JP3426751B2 - Ball moving speed measuring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball striking tool moving speed measuring device for measuring a moving speed of a ball hitting tool when a subject grips the ball hitting tool and swings.

[0002]

2. Description of the Related Art A ball hitting tool moving speed measuring device measures a moving speed of a ball hitting tool when a subject grips and swings a ball hitting tool such as a baseball bat, a tennis or badminton racket. . Conventionally, two light detection means, each of which is composed of a light emitting means for emitting measurement light and a light receiving means for receiving measurement light from the light emitting means and the light receiving means, are arranged above and below the ball hitting tool moving space. In this state, the light receiving means is located side by side in the moving direction of the ball striking tool at a distance from each other. The time until the light reception of the means is blocked by the hitting tool,
That is, by measuring the moving time during which the ball hitting tool moves between the two light detecting means, and calculating the moving speed of the ball hitting tool based on the measured moving time and the interval between the two light detecting means. , Was configured to measure the moving speed of the ball hitting tool. That is, when the distance between the two light detecting means is D and the measurement moving time is Tm, the moving speed V of the hitting tool is calculated by the following equation: V = D / Tm .... (1) In order to measure the movement time of the ball hitting tool moving between the two light detecting means, the interval D between the two light detecting means is set to be larger than the width W along the moving direction of the ball hitting tool. ing.

[0003]

When the subject swings the ball hitting tool and measures the moving speed of the ball, the position and direction in which the subject swings the ball hitting tool are not constant but change. In the conventional device, when the position and the direction in which the subject swings the ball hitting tool changes and the swing position and the swing direction of the ball hitting tool with respect to the two light detecting means change, the light receiving means on the moving side in the moving direction is correspondingly changed. The distance traveled by the ball hitting tool changes from the time when the light is blocked by the light receiving means on the lower side in the moving direction, and therefore the moving speed V of the ball hitting tool is measured. There was a problem that the error was large. This will be described below with reference to FIGS. 10 and 11. However, FIG. 10 and FIG. 11 are plan views, and in the figures, 23f indicates the light receiving means on the upper side in the moving direction, 23r indicates the light receiving means on the lower side in the moving direction, and 15 attaches the light receiving means 23f, 23r. The support is shown.

First, referring to FIG.
A case will be described in which a swing is performed so as to rotate about the center of rotation. As shown in FIG. 10A, in the plan view, the rotation center P of the ball hitting tool B is located on the perpendicular bisector with respect to the virtual line a connecting the two light detecting means, and in FIG. As shown in (b), when the rotation center P of the ball hitting tool B is laterally displaced from the vertical bisector, the light receiving means 23f on the moving direction upper side is blocked after the light receiving means 23f is blocked from moving on the moving direction lower side. The rotation angle at which the ball hitting tool B rotates before the reception of light by the light receiving means 23r is different. That is, if the rotation angle when the rotation center P is on the vertical bisector is α and the rotation angle when the rotation center P is deviated from the vertical bisector is α ′, α ′ <α Therefore, there is a tendency for the difference between α and α ′ to increase as the center of rotation P shifts from the vertical bisector. That is, even if the actual moving speed of the ball hitting tool B is the same, if the position of the rotation center P of the ball hitting tool B when swinging deviates from the vertical bisector, the measured moving time Tm tends to become shorter. is there. However, in both (a) and (b) of FIG. 10, the light receiving means 23f on the moving direction side of the ball hitting tool B is 23f.
The distance between the rotation center P and the portion that shields the measurement light heading to is equal to R.

Next, a case where the ball hitting tool B swings so as to move in parallel will be described with reference to FIG.
As shown in (a) of FIG. 11, in a plan view, the movement direction of the ball hitting tool is parallel to the virtual line a, and as shown in (b) of FIG. 11, the moving direction of the ball hitting tool is the virtual line. Line a
In the case of intersecting with the
The light receiving means 2 on the lower side in the moving direction after the light reception of f is cut off
The distance traveled by the ball hitting tool B before the light reception of 3r is interrupted is different. The moving distance M when swinging in parallel to the virtual line a is equal to the distance D between the two photodetecting means, but the moving distance when swinging in a direction intersecting the virtual line a at a crossing angle θ. M ′ becomes (D ÷ cos θ), and M ′> M. Therefore, even if the actual moving speed of the ball hitting tool B is the same, when the player swings in the direction intersecting with the virtual line a, the measured moving time Tm tends to be long.

That is, in the conventional device, the ball hitting tool B is operated after the light receiving means 23f on the upper hand side in the moving direction is cut off until the light receiving means 23r on the lower hand side in the moving direction is cut off.
The moving speed is calculated by the above calculation formula (1), where D is the moving distance of moving (including rotation). However, as described above, when the position or direction of swinging the hitting tool B changes. Along with that, the moving distance actually moved by the ball striking tool B changes from the time when the light receiving means 23f on the upper side in the moving direction is cut off to the time when the light receiving means 23r on the lower side in the moving direction is cut off. Therefore, the measurement error of the moving speed V becomes large.

The present invention has been made in view of the above circumstances, and an object thereof is to move a ball hitting tool with a small error in measuring the moving speed of the ball hitting tool, regardless of changes in the position and direction of swinging the ball hitting tool. To provide a measuring device.

[0008]

A first characteristic configuration of a ball hitting tool moving speed measuring device according to the present invention is a moving speed consisting of a light emitting means for emitting measuring light and a light receiving means for receiving measuring light therefrom. The detection light detecting means is provided in a state in which the light emitting means and the light receiving means are separately arranged above and below the ball hitting tool moving space in which the ball hitting tool moves by the swing of the subject holding the ball hitting tool. Light-blocking time measuring means for measuring the light-blocking time when the reception of measuring light is blocked by the ball-hitting tool, light-blocking time measured by the light-blocking time measuring means, and movement of the ball-hitting tool moving in the ball-hit tool moving space. The point is that an arithmetic means for calculating the moving speed of the hitting tool based on the width along the direction and an output means for outputting the arithmetic result of the arithmetic means are provided.

The second characteristic configuration is to detect passage of the ball striking tool at a position on the upper hand side in the moving direction of the ball striking tool than the optical path of the measuring light, and to detect the light shielding time to the light shielding time measuring means. A ball hitting tool passage detection means for instructing the start of a new measurement detects a passage of the ball hitting tool on the left side of the optical path of the measuring light, and a state on the right side of the optical path of the measuring light. The point is that it is provided so as to be freely selectable in a state where passage of a ball hitting tool is detected.

In a third characteristic configuration, two light detecting means, each of which is a combination of a light emitting means and a light receiving means for receiving light from the light emitting means, distribute the light emitting means and the light receiving means to above and below the ball striking tool moving space. In the arranged state, the left side of the pair of light detecting means is provided side by side in the moving direction of the ball hitting tool, and the ball passing tool detecting means is the one on the right side. Switching means for switching between a state of using as speed detecting light detecting means and a state of using the right side as the hitting tool passage detecting means and using the left side as moving speed detecting light detecting means Is provided.

A fourth characteristic configuration is that a width setting means for changing and setting the width of the hitting tool is provided.

A fifth characteristic configuration is that a target object which is a target when a subject swings the hitting tool is provided in the hitting tool moving space.

A sixth characteristic configuration is that the moving speed detecting light detecting means, the hitting tool passage detecting means, the light-shielding time measuring means, the calculating means, the output means and the target are:
It is attached to the support.

According to a seventh characteristic configuration, the moving speed detecting light detecting means and the ball hitting tool passage detecting means are assembled to a support, and the light shielding time measuring means, the calculating means and the output means are provided. The control unit and the target object are provided separately from the support body.

[0015]

The operation of the first characteristic configuration is as follows. When the subject swings the ball hitting tool so as to move in the ball hitting tool moving space between the light emitting means and the light receiving means, the ball hitting tool cuts off the reception of the measurement light by the light receiving means, and the light interception is blocked. The time is measured by the light shielding time measuring means. Then, based on the light-shielding time Tn measured by the light-shielding time measuring means by the calculating means and the width W along the moving direction of the ball-striking tool moving in the ball-striking tool moving space, the ball-hitting tool is calculated by the following formula (2). Is calculated, and the calculation result is output to the output means. V = W / Tn ... (2) However, the width W along the moving direction of the hitting tool is set to the width of the hitting tool (the length in the direction orthogonal to the longitudinal direction of the hitting tool).

Next, with reference to FIGS. 7 and 8, a process in which the reception of the measuring light by the light receiving means is blocked by the hitting tool will be described. 7 and 8 are plan views, in which 21 indicates a light receiving means and 11 indicates a support to which the light receiving means 21 is attached.

First, the above process will be described with reference to FIG. 7 in the case where the ball striking tool B is swung so as to rotate around the point P as the center of rotation. Let R be the distance between the rotation center P and the portion of the ball hitting tool B that blocks the measuring light toward the light receiving means 21. As shown in FIG. 7A, the ball striking tool B has a fan-shaped center with a radius R and a chord length W while the measurement light received by the light receiving means 21 is blocked by the ball striking tool B. Rotate the angle β corresponding to the angle. Therefore, the moving speed V of the ball hitting tool B can be obtained by dividing the length of a fan-shaped arc having a radius R and a central angle β by the measured light-shielding time Tn measured by the light-shielding time measuring means. However, a hitting tool B such as a baseball bat, badminton or tennis racket
Is sufficiently small with respect to its length, the central angle β becomes small, and when the central angle β is small, the difference between the length of the fan-shaped chord and the length of the arc is extremely small. There is no problem in practical use even if the moving speed V is calculated by the above calculation formula (2). The rotation center P of the hitting tool B is (a) in FIG.
Even if the position shown in FIG. 7 is shifted from the position shown in FIG. 7 to the position shown in FIG. If there is, the light receiving means 21 receives the measuring light and the hitting tool B
The angle at which the ball hitting tool B rotates while being blocked by is the same as β. Therefore, even if the position of the rotation center P of the ball hitting tool B changes, if the actual moving speed of the ball hitting tool B is the same, the measured light shielding time Tn is the same.

Next, with reference to FIG. 8, a process in which the ball hitting tool B blocks the light receiving means 21 from receiving the measuring light when the ball hitting tool B swings so as to move in parallel will be described. When the width direction of the ball hitting tool B and the moving direction of the ball hitting tool B are parallel, as shown in (a) and (b) of FIG.
Even if the position and direction of the swing are changed, the movement distance L of the ball hitting tool B is equal to the width W while the light receiving means 21 is blocking the measurement light from being received.

Further, as shown in FIG. 8C, the hitting tool B
In the case where the moving direction of B crosses the width direction of the ball hitting tool B, when the crossing angle between the width direction and the moving direction is θ, while the ball receiving tool B blocks the reception of the measuring light by the light receiving means 21, The moving distance L ′ that the ball hitting tool B moves is (W ÷ cos
θ). Here, the case where the moving direction of the ball hitting tool B is parallel to the width direction of the ball hitting tool B, and the moving direction of the ball hitting tool B is
Difference of the moving distance between the case of crossing the width direction of
L is ΔL = W × (1 / cos θ−1). On the other hand, in the conventional device, the difference ΔM in the moving distance between the case of swinging parallel to the virtual line a and the case of swinging in the direction intersecting the virtual line a at the intersection angle θ is ΔM = D × (1 / cos θ−1). Here, since W <D, ΔL <ΔM.

Therefore, even if the position and direction of the swing are changed, the measuring light is received by the light-receiving means B.
The moving distance of the ball hitting tool B while the ball is blocked by the ball hitting tool B does not change when the width direction of the ball hitting tool B and the moving direction of the ball hitting tool B are parallel to each other.
Even when the moving direction of the crossing intersects the width direction of the hitting tool B, the change ΔL thereof is smaller than the difference ΔM of the moving distance in the related art. As a result, according to the first characteristic configuration,
The measurement error of the moving speed V can be made smaller than before.

The operation of the second characteristic configuration is as follows. When the subject swings the ball hitting tool, the ball hitting tool passage detection unit detects the passing of the ball hitting tool at a position on the upper side in the moving direction of the ball hitting tool with respect to the optical path of the measurement light, and a new light blocking time is provided to the light blocking unit. Command to start a new measurement. Therefore, the subject does not need to instruct the apparatus to start a new measurement when starting a new measurement.
Further, the ball hitting tool passage detection means detects the passage of the ball hitting tool on the left side of the optical path when the ball hitting tool moves from the left side to the right side of the optical path of the measuring light (hereinafter, Right swinging state) and a state in which when the ball striking tool moves from the right side to the left side of the optical path, a state of detecting passage of the ball striking tool on the right side of the optical path (hereinafter, left direction) It can be switched to a swing state), for example, when measuring the moving speed when a baseball bat is swung, in the case of a right-handed person, the hitting tool passage detection means is set to the leftward swing state. In the case of a left-handed person, the hitting tool passage detecting means is switched to the right swing state. When measuring the moving speed when swinging a badminton or tennis racket, by switching the ball hitting tool passage detection means between the rightward swing state and the leftward swing state, it is possible to swing in the forehand and backhand. It is possible to measure each moving speed when swinging.

By the way, when the hitting tool passage detecting means is provided so as to be selectively operable in the rightward swing state and the leftward swinging state, the hitting tool passage detecting means is provided on the right side and the left side of the optical path of the measuring light. One is provided for each, so that the left and right hitting tool passage detection means can be selectively operated,
One hitting tool passage detecting means is selectively attached to the right side and the left side of the optical path of the measuring light.

According to the third characteristic configuration, two light detecting means are provided, and they are also used as the moving speed detecting light detecting means and the hitting tool passage detecting means.

According to the fourth characteristic configuration, the width of the ball hitting tool along the moving direction can be changed and set according to the ball hitting tool to be used, so that the type of ball hitting tool is changed to a baseball bat, a badminton or a tennis racket. Even if the type of hitting tool is the same or the thickness is different, the moving speed of the hitting tool can be accurately measured. When measuring the moving speed of a badminton or tennis racket, the thickness of the handle portion of the racket shall be the width along the moving direction.

According to the fifth characteristic configuration, since there is a target when swinging the ball hitting tool, it is easy to determine the position and direction of the swing. For example, the moving direction of the ball hitting tool is as wide as possible. It is possible to swing so as to be parallel to the direction, and it is possible to avoid as much as possible a state in which the movement direction of the hitting tool crosses the width direction of the hitting tool.

According to the sixth characteristic configuration, it is possible to unitize the hitting tool movement speed measuring device.

According to the seventh characteristic configuration, the control section and the target are provided separately from the support, and only the light moving speed detecting light detecting means and the ball hitting tool passage detecting means are attached to the support. Therefore, the strength of the support can be weakened.
If the strength of the support is weakened, the vibration when the hitting tool hits the target object is transmitted to the support, and the moving speed detection light detection means and the hitting tool passage detection means vibrate, and the accuracy of the moving speed measurement deteriorates. However, according to the seventh characteristic configuration, the target object is provided separately from the support member, and the vibration when the hitting tool hits the target object is not transmitted to the support member. It is possible to prevent the measurement accuracy of the moving speed from decreasing.

[0028]

According to the first characteristic configuration, it is possible to provide a ball hitting tool moving speed measuring device having a small error in measuring the moving speed of the ball hitting tool irrespective of changes in the position and direction of swinging the ball hitting tool. It became so.

According to the second characteristic configuration, when the subject starts a new measurement, it is not necessary to instruct the device to start a new measurement, which is convenient and the moving speed can be measured. Since a normal swing can be performed without being conscious of doing so, it is possible to perform measurement in accordance with the actual situation. By the way, if the subject instructs the device to start a new measurement, the subject may become overconscious and unable to perform a normal swing.In this case, the measurement according to the actual situation may occur. Can't do. Also, it can be used by any right-handed or left-handed person, and can be used for both forehand and backhand swings in badminton and tennis, so that versatility can be improved. became.

According to the third characteristic structure, any one of right-handed and left-handed persons can be used with a simple structure in which only two light detecting means are provided, and forehand and back in badminton and tennis. It has become possible to provide a highly versatile device that can be used in any swing of the hand.

According to the fourth characteristic configuration, even if the type of the ball hitting tool changes, or if the thickness of the ball hitting tool changes even if the type of the ball hitting tool is the same, the moving speed of the ball hitting tool can be accurately adjusted. Since the measurement can be performed well, the versatility can be improved.

According to the fifth characteristic configuration, even if the position or direction of swinging the ball hitting tool changes, the measurement error of the moving speed of the ball hitting tool is reduced, and the position or direction of the swinging ball is kept in an appropriate state. Therefore, it is possible to avoid a state in which the ball hitting tool swings so that the moving direction of the ball hitting tool intersects the width direction of the ball hitting tool as much as possible, and it is possible to further reduce the measurement error.

According to the sixth characteristic configuration, the device can be easily moved.

According to the seventh characteristic configuration, the strength of the support is weakened while preventing the accuracy of measurement of the moving speed from decreasing.
It has become possible to reduce costs.

[0035]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1 to FIG. 3, the ball hitting tool moving speed measuring apparatus includes a stand 1 as a support, two light detection means 2, a control unit 3, and a subject when the ball hitting tool B swings. The target object 4 to be the target is assembled and unitized.

The stand 1 is constructed so that it can be moved and installed on the ground or floor, and a base 12 having a plurality of adjusters 11 attached thereto, and a column 13 standing upright on the base 12. And an arm portion 14 attached to the column 13. The space between the base 12 and the arm portion 14 serves as a ball striking tool moving space K in which the ball hitting tool B moves by the swing of the subject holding the ball hitting tool B.
The moving direction of the ball hitting tool B that moves in the ball hitting tool moving space K is the left-right direction (the left-right direction in FIG. 1) in a front view.

The light detecting means 2 comprises a combination of a light emitting device 21 as a light emitting device and a light receiving device 22 as a light receiving device for receiving light from the light emitting device 21, and two of the light detecting devices 2 are moved by the ball striking tool B. They are arranged side by side. Although the two light detecting means 2 have the same structure, for the sake of explanation, the right side in the front view will be described as 2R and the left side will be described as 2L. Further, the light-emitting device of the right-side photo-detecting means 2R is described as 21R, the light-receiving device is described as 22R, the light-emitting device of the left-hand photo-detecting means 2L is described as 21L, and the light-receiving device is described as 22L. By attaching the light emitter 21R of the right-side photodetection means 2R to the arm portion 14 of the stand 1 and the light receiver 22R to the base 12, the light emitter 21R and the light receiver 22R are moved up and down in the ball striking tool moving space K. It is distributed and arranged. Similarly, the light emitter 21L of the left side light detecting means 2L is set to the stand 1
By attaching the light receiver 22L to the base 12 and the light receiver 21L and the light receiver 2L.
2L is arranged above and below the ball hitting tool moving space K.

Next, the control section 3 will be described. The control unit 3 includes a casing 5, a control circuit 6 installed in the casing 5, and an operation panel 7 provided on one surface of the casing 5.
The control panel 7 is attached to the column 13 of the stand 1 with the operation panel 7 facing the front. As shown in FIG. 4, the operation panel 7 has a display 8 as an output means for digitally outputting the measured moving speed of the hitting tool B.
And a state where the ball hitting tool B swings from right to left in front view (hereinafter abbreviated as a left swing state), and a ball hitting tool B swings to move from left to right in front view. A swing direction changeover switch 9 for changing over to a state (hereinafter abbreviated as a rightward swing state) and a thickness setting section 10 for changing and setting the thickness W of the hitting tool B are provided.

For example, when measuring the moving speed when a baseball bat is swung as the hitting tool B, the right-handed person is in the leftward swing state, and the left-handed person is in the rightward swing state. , And the swing direction selector switch 9 is switched. Also, when measuring the moving speed when swinging a badminton or tennis racket, for example, in the case of a right-handed person, when swinging in the forehand, it is in the leftward swing state, and when swinging in the backhand, it is in the rightward direction. The swing direction selector switch 9 is switched to the swing state. In the thickness setting unit 10, when measuring the moving speed when a baseball bat swings as the ball hitting tool B, the thickness of the batted ball portion of the bat is set, and when a badminton or tennis racket is swung. When measuring the moving speed of
Set the thickness of the racket handle.

As shown in FIG. 5, the control circuit 6 includes an amplifier 61R which amplifies an output signal from the light receiver 22R on the right side,
Amplifier 6 that amplifies the output signal from the left light receiver 22L
1L, a reference frequency oscillator 62A, a count gate control unit 62B, a pulse counter unit 62C, a count data latch unit 62D, and a latch reset unit 62E, and a photodetector of any one of the two photodetector units 2R and 2L. In the light-shielding time measuring means 62 for measuring the light-shielding time Tn in which the reception of the measuring light by the 22R and 22L is blocked by the ball hitting tool B, and the light-shielding time Tn measured by the light-shielding time measuring means 62 and the thickness setting section 10. Set hitting tool B
The calculation means 63 calculates the moving speed V of the ball hitting tool B based on the thickness W of the ball. The computing means 63 is composed of a microcomputer.

Next, the procedure for calculating the moving speed V of the ball hitting tool B in the control circuit 6 will be described with reference to the flowchart shown in FIG. When the swing direction change-over switch 9 is switched to the leftward swing state, when the light blocking signal is input from the light receiver 22R of the light detecting means 2R, the previous count held in the count data latch unit 62D is counted. When the light cutoff signal is input from the light receiver 22L of the photodetector 2L after resetting the pulse count number P, while the light cutoff signal is being input,
The number of pulses is counted, and the newly counted pulse count number P is held in the count data latch unit 62D (steps # 1 to # 8). Further, when the swing direction change-over switch 9 is switched to the rightward swing state, when the light cutoff signal is inputted from the light receiver 22L of the light detection means 2L, the previous time held in the count data latch section 62D. When the counted pulse count number P is reset and subsequently the light cutoff signal is input from the light receiver 22R of the light detection means 2R, while the light cutoff signal is being input,
The number of pulses is counted, and the newly counted pulse count number P is held in the count data latch unit 62D (steps # 1 to # 8).

Then, the calculating means 63 has the pulse count number P held in the count data latch section 62D.
Then, based on the thickness W of the ball hitting tool B set by the thickness setting unit 10, the moving speed V of the ball hitting tool B is calculated by the following calculation formula (step # 9). V = (W × Ck) ÷ P However, Ck (KHz) is a reference frequency (unit is KHz), and light-shielding time Tn (unit is second) is Tn = P ÷ Ck. Since the moving speed V calculated by the above calculation formula is the speed per second (m / s), the calculating means 63 converts this into the speed per hour (Km / h) and then displays it on the display 8 (step # 10). .

Therefore, the swing direction selector switch 9
Is switched to the leftward swing state, the right-hand side photodetector 2R of the pair of photodetectors 2R, 2L is located on the upper hand side in the moving direction of the ball hitting tool B than the optical path of the measuring light. As the ball hitting tool passage detecting means Sp for detecting the passage of the ball hitting tool B in the above and instructing the light blocking time measuring means 62 to start a new measurement of the light blocking time Tn, and the left light detecting means 2L is the moving speed. When the swing direction changeover switch 9 is switched to the rightward swing state in the state of being used as the detection light detecting means Sv, the left side light detecting means 2L of the pair of light detecting means 2R, 2L is selected. In this state, the ball hitting tool passage detecting means Sp is used and the right side light detecting means 2R is used as the moving speed detecting light detecting means Sv. Further, the swing direction change-over switch 9 corresponds to a changing means.

As shown in FIGS. 1 to 3, the target object 4
Is a rod-shaped body 41 attached to the base 11 in a vertical posture by a screw (not shown), an elastic body 42 connected to the upper end of the rod-shaped body 41 and biased to return to the vertical posture, and the elastic body thereof. 42
And a baseball ball 44 attached to the upper end of the rod 43,
It is configured to be selectively attached to the right side and the left side of the base 11 with screws. The elastic body 42 is made of a spring or rubber. That is, when a right-handed person swings a baseball bat, the target object 4 is attached to the left side of the base 11, and when a left-handed person swings a baseball bat, the target object 4 is right side of the base 11. Attach to.

Another Embodiment Next, another embodiment will be described. In the above embodiment, two light detecting means 2R, 2L are provided side by side in the moving direction of the ball hitting tool B, and they are also used as the ball hitting tool passage detecting means Sp and the moving speed detecting light detecting means Sv. Although illustrated, instead of this, the moving speed detecting light detecting means Sv including the light emitting device 21 that emits the measuring light and the light receiving device 22 that receives the measuring light from the light emitting device 21.
Above and below the ball striking tool moving space K.
2 and 2 are provided separately, and ball hitting tool passage detection means Sp is provided on each of the left and right sides of the moving speed detection light detection means Sv so that the left and right ball hitting tool passage detection means Sp can be selectively operated. May be. Alternatively, one hitting tool passage detecting means Sp may be selectively attached to the right side and the left side of the moving speed detecting light detecting means Sv. In these cases, as a specific configuration of the ball hitting tool passage detection means Sp, in addition to the light detection means 2 including the light emitter 21 and the light receiver 22 shown in the above-mentioned embodiment, for example, a reflection type optical sensor or an ultrasonic sensor. Can be applied.

When swinging the tennis racket, the baseball 4 in the above embodiment is used as the target 4.
Instead of 4, a tennis ball may be attached and configured. Further, when swinging the badminton racket, a blade (shuttle cock) as the target object 4 may be configured to be hung from the arm portion 14 with a string.

A printer that prints out the calculation result of the calculation unit 63 may be provided as the output unit.

As shown in FIG. 9, the control unit 3 and the target 4 may be provided separately from the stand 1. Control unit 3
Is a CRT that displays and outputs the measured moving speed of the hitting tool B.
It comprises a display 31, a casing 32 in which the control circuit 6 is installed, a keyboard 33 for switching between the leftward swing state and the rightward swing state, and changing and setting the thickness W of the hitting tool B. is there. Therefore, the keyboard 33 corresponds to a switching unit and a width setting unit. The result of switching between the leftward swing state and the rightward swing state by the keyboard 33, and
The setting result of the thickness W of the hitting tool B is also displayed on the CRT display 3
1 is displayed. The target object 4 includes a base 45, a rod-shaped body 41 attached to the base 45 in a vertical posture, and an elastic body 42 connected to the upper end of the rod-shaped body 41 and biased to return to the vertical posture. The rod-shaped body 43 connected to the upper end of the elastic body 42 and the baseball ball 44 attached to the upper end of the rod-shaped body 43 are configured to be installed on the ground or floor. .

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a front view of a ball hitting tool movement speed measuring device.

FIG. 2 is a left side view of a ball hitting tool movement speed measuring device.

FIG. 3 is a plan view of a ball hitting tool movement speed measuring device.

FIG. 4 is a front view of an operation panel of a ball hitting tool movement speed measuring device.

FIG. 5 is a block diagram of a control circuit of a ball hitting tool movement speed measuring device.

FIG. 6 is a diagram showing a flowchart of control operation of a control circuit of a ball hitting tool movement speed measuring device.

FIG. 7 is a plan view illustrating the operation.

FIG. 8 is a plan view illustrating the operation.

FIG. 9 is a front view of a ball hitting tool movement speed measuring device according to another embodiment.

FIG. 10 is a plan view of a main part of a conventional ball hitting tool movement speed measuring device.

FIG. 11 is a plan view of a main part of a conventional ball hitting tool movement speed measuring device.

[Explanation of symbols]

1 support 3 control unit 4 target 8 output means 9 Switching means 10 width setting means 2R, 2L light detection means 21,21R, 21L light emitting means 22,22R, 22L light receiving means 62 Shading time measuring means 63 computing means B ball hitting tool K ball striking tool movement space Sv moving speed detection light detection means Sp hitting tool passage detection means W width

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A63B 69/00 G01P 3 / 36,3 / 68

Claims (5)

(57) [Claims] 1. A light emitting means (21 ) for emitting measuring light.
R), (21L) and light receiving means (22R), (21L) for receiving measuring light from the moving speed detection light detecting means (Sv), the swing of the subject holding the ball hitting tool (B). By means of the light emitting means (21R), (21) above and below the ball hitting tool moving space (K) in which the ball hitting tool (B) moves.
L) and light receiving means (22R), (22L)
Installed side by side in the moving direction of the ball hitting tool (B).
The light-shielding time measuring means (62) for measuring the light-shielding time when the light-receiving means (22R), (22L) is interrupted by the ball hitting tool (B) for receiving the measuring light. 62) measures the light-shielding time and the moving speed of the ball hitting tool (B) based on the width (W) along the moving direction of the ball hitting tool (B) moving in the ball hitting tool moving space (K). a calculation for calculating means (63), output means (8) and the shot tool moving velocity measuring device der provided for outputting the calculation result of the calculating means (63)
Then, the moving direction of the hitting tool (B) rather than the optical path of the measuring light
The passage of the ball hitting tool (B) at the improvement hand side is detected.
The light-shielding time is measured by the light-shielding time measuring means (62).
Ball hitting tool passage detection means (S) for instructing the start of new measurement
p), the light emitting means (21R), (21L) and the light emitted therefrom are
Combination with the light receiving means (22R), (22L) for receiving light
Of the light detecting means (2R) and (2L) consisting of
Of the left side is the hitting tool passage detecting means (Sp).
And the one on the right side is the light detecting means for detecting the moving speed.
The state used as (Sv) and the one on the right side are
The ball pass detection means (Sp) and the one on the left side
State used as moving speed detection light detection means (Sv)
A ball tool moving speed measuring device provided with a switching means (9) for switching to and . Wherein said ball-hitting instrument Claim width setting means for setting changes the width in (B) (10) is provided with 1
The ball hitting tool movement speed measuring device described. To wherein the hitting member moving space (K), subjects the ball striking device target as a target during the swing (B) (4) according to claim it is provided 1 or 2, wherein the hitting member Moving speed measuring device. 4. The light detecting means for detecting the moving speed (S)
v), the hitting tool passage detecting means (Sp), the light-shielding time measuring means (62), the calculating means (63), the output means (8) and the target object (4) on the support (1). The hitting tool movement speed measuring device according to claim 3, which is assembled. 5. The light detecting means (Sv) for detecting the moving speed
And the hitting tool passage detection means (Sp) is a support (1).
The control unit (3) assembled to the light shielding time measuring unit (62), the calculating unit (63) and the output unit (8), and the target object (4) are respectively connected to the support (1). ) Is provided separately from the ball hitting tool moving speed measuring device according to claim 3 .