JP4914977B2 - Tennis racket strike identification counter - Google Patents

Description

The present invention relates to a racket hit counter that measures the number of hits of a tennis racket.

In Patent Literature 1, which has a batting number detection unit, a counter unit, a batting number display unit and the like inside the tennis racket grip end, the reaction force of the gut is converted into an electric signal when hit, and this is counted and displayed. A hit number counter has been proposed for determining whether or not a sweet spot has been hit.
JP 59-90577 A

However, as part of improving tennis skills, it is important to practice intensively in the field of forehand batting practice and the field of batting practice in the backhand. I only had a sensuous memory of whether I hit it or not. Therefore, we aim to numerically know and grasp the number of forehand and backhand shots hit by the practitioner, effectively adjust the number of shots, overcome the weaknesses, and improve overall tennis skills.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a practitioner with a hit number identification counter that displays the number of forehand hits and the number of backhand hits on a racket.

Therefore, as a solution, the first is a forehand hitting ball hitting on the surface of the gut surface and two detection sensors (uniaxial, directional) for detecting a backhand hitting ball hitting the back side of the gut surface. A calculation unit for accumulating the number of strokes, a display unit for displaying a numerical value, a reset unit for resetting the numerical value, and a power supply unit are provided in the housings of the two counters, respectively. The case is fixedly integrated with the band, and the casing is attached to the grip maximum detection band where the impact direction of the hit and the detection direction are the same direction with the grip band, and is detachable.

Therefore, as a solving means, in one counter housing, a uniaxial directional impact detection sensor for detecting a forward hit ball, a uniaxial directional impact detection sensor for detecting a reverse hit ball, and a forward direction and a calculation unit for accumulating the reverse direction of each stroke number values in both directions, a memory unit for storing the droplet value of the bi-directional, a reset unit for resetting each droplet wherein the numerical values of both, the bats values of the bi-directional and their There is provided a total number display switching unit, a numerical value display unit for displaying each striking value in both directions and the total number thereof, and a power source unit, and the case is integrally fixed to a grip band, and the impact of the hitting the case The grip band is detachable on the grip outer periphery where the direction and the detection direction are the same.

And, in the tennis racket hit number identification counter, the reached hit number setting part preset by the practitioner, the hit number calculation comparison processing part for comparing and calculating the current hit number and the set hit number, a notification sound part emitted when the set hit number is exceeded, It is comprised from the arrival reset part which resets the arrival number.

A grip band fixing band is provided on the outer periphery of the grip to prevent the grip band from loosening during intense practice.

In the present invention, the tennis player can easily attach and detachably attach to the grip of various tennis rackets, and the number of strikes and the number of total strikes of the forehand and backhand are displayed on the display unit. To understand and improve the skills, how much the amount of practice to be short should be done can be practiced systematically without any excess or deficiency. Excessive number of strikes, especially how important the forehand or backhand in practice is. Analyzing and grasping deficiencies is a great guide for improving overall technology.

(Composition of tennis racket strike counter)
In the batting number identification counter according to the present invention, as shown in FIG. 6, a sensor having a single axis and directionality is selected, and corresponds to either the forehand direction Pf or the backhand direction Pb of the X axis. The detection unit has a function of detecting an impact, and the sensor having the uniaxial direction includes an acceleration sensor (piezoelectric element, vibration sensor), a pendulum, and the like. The calculation unit is configured with a base for counting up the electric pulse signal output from the sensor. The display unit is composed of an LCD (liquid crystal display), etc., and displays the cumulative number of shots, etc., and the above-mentioned units including the power supply unit are provided in the counter housing, and the housing is fixed on the grip band. The counter for the one-way detection is formed as shown in FIG. The two counters described above are attached to the maximum detection zone (described later) on the outer periphery of each grip with a grip band to constitute a tennis racket hitting counter. 3, 4, 7, 8, and 9 are perspective views of the mounting appearance.

Since the detection sensor is installed in the counter casing as described above, the impact detection direction is the same as the direction of the counter casing. same as below.

The counter housing with the detection sensor has the same impact on the entire racket as the direction of impact received by the gut at the moment of impact. Is the best.

There are two ways of distinguishing the forehand hit ball and the backhand hit ball depending on the position and direction of mounting the counter housing on the outer periphery of the grip, and one is a method of mounting on the opposite maximum detection zone on the outer periphery of the grip. The second method is based on the detection direction of the sensor (counter housing) mounted on the grip outer circumference maximum detection zone.

Embodiments of the present invention will be described below with reference to the drawings.
As a condition of the present invention, first, in order to discriminate and count the number of hits of the so-called forehand hitting on the surface of the racket and the number of hits of the backhand hitting on the back of the racket, the sensor has a uniaxial and directional characteristic as a characteristic. Basically, the condition (detects the forward direction but does not detect the reverse direction) and detects when the detection direction of the sensor is the same as or close to the impact direction of the hit ball.
(For claim 1)

1 shows two grips 1 and 2 on the grip band 5 (the same applies after the pair of front and back fastener convex surfaces 6 and 7 are attached), a counter housing F29, a counter housing B39, and a grip band fixing belt 10 It is a mounting perspective view of the striking number identification counter comprised by these. The counter housing F29 and the counter housing B39 are arranged on the same grip maximum detection band a2 and are mounted with detection directions opposite to each other, so that each counter becomes a forehand hitting counter and a backhand counter. .

FIG. 2 is an external view of the striking discriminating counter configured by fixing two units of the counter housing F29 and the counter housing B39 on the grip band 5 at intervals of a half circumference of the grip outer periphery. When mounted on the grip 1, the counter casing F29 and the counter casing B39 are mounted on the grip maximum detection band a2 and the grip maximum detection band b3 facing each other with the grip 1 therebetween.

In FIG. 3, two counter casings F29 and B39 are fixed to one grip band 5, and grip 1 is sandwiched between two counter casings, and grip maximum detection band a2 and grip maximum detection band b3 are shown. It is a perspective view integral with the racket of the hit number identification counter with which it was mounted. The two counter housings can balance their weight.

FIG. 4 shows a racket of a striking discriminating counter in which one counter case is fixed to one grip band 5, and the counter case F29 is attached to the maximum grip detection band a2 and the counter case B39 is attached to the maximum grip detection band b3. FIG. Each has the advantage that the detection angle and detection sensitivity of the counter can be changed independently.

FIG. 5 is a block diagram showing an internal configuration of a batting number identification counter having two counters. The counter housing 29 includes a detection unit 20 including a sensor for detecting a forehand hit ball, an integration unit 21 for integrating impact electric signals of hitting, a display unit 22 for displaying numerical values, a reset unit 23 for resetting numerical values, a power source A portion 24 is provided. The counter housing 39 includes a detection unit 30 including a sensor for detecting a backhand hit ball, an integration unit 31 for integrating the impact of an impact on an electric signal, a display unit 32 for displaying a numerical value, a reset unit 33 for resetting the numerical value, a power source This is a striking number identification counter composed of two counter housings having a section 34 therein.

As shown in FIGS. 1, 2, 3, 4, and 5, the striking number identification counter according to the present embodiment includes a detection unit, a calculation unit, a display unit, a reset unit, a power source, and the like.

FIG. 6 is a perspective view of the counter casing F29 (the counter casing B39 is also the same type). The detection direction of the detection sensor is the Sf direction, the Sb direction is not detected, and the Pb direction that receives the impact impact is detected because it is the same direction as the Pf direction that receives the impact impact. , Having directionality, detecting only one direction of the xx ′ axis, and not detecting the yy ′ axis and the zz ′ axis).
The counter housing F29 is fixed to the grip band 5, and the front and back surfaces of the grip band 5 are bonded to each other with fasteners 6 and 7 respectively.

7, 8, and 9 show the best mounting position of the hit number identification counter, and FIG. 10 is an external view of the non-detecting mounting position.

FIG. 11 is a side view of a racket in which only a one-way counter casing 29 is wound with a band fixing band on the grip maximum detection band a2 and a one-way counter casing is mounted thereon.

FIG. 12 is an external view showing a weak detection position where the grip band fixing band 10 is adhered and the mounting angle of the striking number identification counter is changed.

FIG. 16 is a cross-sectional view taken along the line AA ′ of FIGS. FIG. 10 is a position diagram of the counter housing 29 and the counter housing 39 facing each other on the grip outer circumference and at a reference axis GL of 360 degrees from 0 degrees.
(For claims 2 and 3)

FIG. 17 shows a batting identification counter in which one counter housing 110 is fixed to one grip band 5 and the detection means 100 in which the detection direction is opposite to the normal direction and the detection means 2102 are arranged in a cross section. FIG. The detection directions are the forehand direction Sf and the backhand direction Sb.

FIG. 18 is a block diagram of the racket strike number identification counter of FIG.
A forehand sensor in the detection unit 1101 having a uniaxial direction and a backhand sensor in the detection unit 2102 are provided, the calculation unit 103 for counting the number of hits, the memory unit 104 for storing the count number, and the count number are displayed. The display unit 106 for setting the hit number, the hit number setting unit 111 for setting the hit number, the hit number calculation comparison processing unit 113 for comparing the hit number, the reset unit 107 for resetting the count number, and the alternate changeover switch of the switching unit 105 of the display unit 106 Forehand batting number display and backhand batting number display, a total display of both batting numbers, an indication of the reaching batting number setting, a reaching batting number setting unit 111 for setting the reaching batting number, an arithmetic unit 113 for performing the batting number reaching calculation, A reset unit 117 that resets the number of hits, a power supply unit 108, and an arrival sound notification unit 11 that notifies when the number of hits is reached. A bats identification counter that internally provided and.
(For claim 4)
In FIG. 1, the grip band is loosened during practice. To prevent the grip band from being loosened, a grip band fixing band 10 is provided on the outer periphery of the grip in advance, and is wound and fixed. The looseness of the grip band can be easily eliminated by pasting together the fastener surface paired with the back surface of the grip band. In addition, a flexible band and a rubber band are also preferable.
(Tennis racket hitting counter operation / wearing)

To place the sensor on the outer periphery of the grip and take the detection characteristics, as shown in FIG. 15 (cuts in the direction of arrows AA ′ in FIGS. 3 and 9), the sensor F20 and sensor B30 are 360 degrees from the strike reference axis 0 degrees. The characteristic curves during rotation are shown in FIGS. FIG. 15 is a sensitivity characteristic curve of a hit number discrimination counter in which the sensor F20 and the sensor B30 are simultaneously mounted.

In FIG. 16, the vertical line of the gut surface is used as the reference axis of the impact direction (most hit balls are impact directions close to vertical), and the detection sensor Sf and the detection sensor Sb are spaced 180 degrees on the outer periphery of the grip. FIGS. 13 and 14 show detection sensitivity characteristics when rotated clockwise by 360 degrees.
"Grip maximum detection zone a"

In FIG. 13, the detection direction of the sensor F is 0 degree of the batting reference direction, the detection axis is positive from 0 degree to 180 degrees, increases from 0 degree to 90 degrees, and the maximum sensitivity point is reached at 90 degrees. Become. A part of the surface formed by the grip outer circumference tangent direction and the grip longitudinal direction at this angle is the grip maximum detection band a2 (however, this angle includes practically within ± 45 degrees and does not hinder practical detection). Call. This is the best mounting position for the counter housing. Decrease from 90 degrees and zero sensitivity at 180 degrees. From 180 degrees to 360 degrees, the back surface of the gut surface is detected, and the detection direction of the sensor F is reversed, so that the sensitivity of the sensor F has a zero sensitivity characteristic.
"Grip maximum detection band b"

Next, FIG. 14 shows sensitivity characteristics in which the sensor B is mounted on the grip maximum detection band b3 in which the detection direction is the opposite direction to that described above. That is, from 0 degrees to 180 degrees in the reverse direction, the sensor detection direction is the reverse direction, and thus zero sensitivity is obtained. On the other hand, from 180 degrees to 360 degrees, the forward direction is reversed, from 180 degrees to 270 degrees, and the maximum sensitivity is reached at 270 degrees. A part of the surface formed by the tangential direction on the grip outer periphery and the grip longitudinal direction at this angle is the grip maximum detection band b3 (however, this angle includes practically within ± 45 degrees and does not hinder practical detection). Call. This is the best mounting position for the counter housing. The sensitivity characteristic is reduced from 270 degrees to 360 degrees and becomes zero sensitivity at 360 degrees.

When the sensor F is mounted at 90 degrees in the forward direction on the outer periphery of the grip shown in FIG. 16 and the sensor B is mounted at 270 degrees in the reverse direction on the outer periphery of the grip, forming a batting identification counter and rotating from the reference axis GL0 to 360 degrees FIG. 15 shows the sensitivity characteristics. From this, it is physically convenient that two maximum sensitivity points exist at the opposite positions of 90 ° and 270 ° on the outer periphery of the grip (a tangential line on the outer periphery of the grip and a belt in the longitudinal direction) and 180 ° apart. The counter case for the forehand is positioned 90 degrees on the outer periphery of the grip at the maximum sensitivity point (the sensor detection direction is the same as the counter direction since the sensor is installed in the counter case. The same applies hereinafter). Wearing and mounting the counter case for the backhand on the 270 degree part on the outer periphery of another maximum sensitivity point grip, the forehand sensor F is the maximum sensitivity point. Detect. At that time, the backhand sensor B is not detected because it is in the reverse axis.

The hit ball hit on the back hand surface is detected by the back hand sensor B at the maximum sensitivity point, but at that time the fore hand sensor F becomes the reverse direction axis and is not detected. This makes it possible to discriminate and distinguish between a hit ball hit on the front surface of the racket and a hit ball hit on the back surface, and the forehand hit ball and the back hand hit ball can be identified and counted.

With respect to claim 1, the grip position of the two counter housings is the maximum detection sensitivity point and the detection directions are opposite to each other in the maximum grip detection zone a2 and the maximum grip detection zone b3, respectively. The case is mounted on the outer periphery of the grip in the same detection direction. All impact electric pulses detected by the impact detection sensor of the detection unit F of the forehand casing are counted by the calculation unit F, sent to the display unit F, and numerically displayed as a forehand hit ball. Unnecessary numerical values before the start of measurement are cleared to zero by the switch operation of the reset unit. All impact electric pulses detected by the impact detection sensor of the detection unit B of the backhand casing are counted by the calculation unit B, sent to the display unit B, and numerically displayed as a backhand hit ball, before the start of measurement. Unnecessary numerical values are cleared to zero by the switch operation of the reset unit.
The forehand hitting counter and the backhand hitting counter can be distinguished by the difference in the grip mounting position of the counter housing.

With respect to claim 2, since a detection sensor having a direction opposite to the detection direction is provided in a single hit number identification counter housing, only one of the grip maximum detection band a2 or the grip maximum detection band b3 is provided. Attach to. If the wearing is reversed, the display of the forehand hit ball and the backhand hit ball is reversed. In the strike number identification counter block diagram of FIG. 17, the detection unit 1 for forward direction detection, the detection unit 2 for detecting reverse direction detection, and sensor impact signals from both directions are sent to the calculation unit 103 as impact electrical pulse signals, integrated, and impact The number of pulses is stored in the memory unit 104, and the number of strokes detected by the detection unit 1 is numerically displayed on the display unit 106 as the number of forehand hits by the switch operation of the display switching unit 105. The number of hits detected by the detection unit 2 is sent as an impact signal pulse to the calculation unit 103 as the number of backhand hits, the pulses are integrated, the number of impact pulses is stored in the memory unit 104, and the detection unit is operated by a switch operation of the display switching unit 106 The number of hits detected in 2 is displayed numerically on the display unit 106 as the number of backhand hits. This switching operation is performed by switching the forehand strike number, the backhand strike number, the total number of strokes, and OFF with the alternate switch. To reset the numerical value, the memory is cleared by the reset switch of the reset unit 107.

Regarding claim 3,

In the block diagram of FIG. 18, in the batting number calculation comparison processing unit 113 that performs a comparison calculating process of the cumulative number of batting counts from the memory unit 104 of the above-described batting number identification counter and the reaching batting number of the reaching batting number setting unit 111 that sets the reaching batting number in advance. When reaching the number of hits, the arrival sound notification unit 116 notifies the arrival sound. In order to clear the reaching hit number, the reaching number reset unit 117 is operated by a switch.
About claim 4

As shown in FIGS. 1, 11, and 12, the grip fixing band 10 is wound around the grip and fixed by the grip band to stabilize the counter housing.
(Grip mounting position and method of tennis racket identification counter)

In the striking number identification counter configuration of the present invention, one counter case is fixed to one grip band, and one counter case is fixed to one grip band, and the number of hits is identified by two units. There are two types, one that constitutes the counter, and the other that consists of two counter cases fixed on one grip band.

There are two methods of wearing. There are two ways to attach the counter housing to the maximum detection zone on the outer periphery of the grip. The first is 1 in the one grip band mentioned above
A method of attaching a counter counter case to the grip maximum detection zone, and then attaching it to the maximum detection zone on the outer periphery of the grip, which conflicts in the same direction as the counter case of the same type. The second is a method of mounting two counter housings in the opposite direction on the same grip maximum detection zone.

In an identification counter that includes a detection unit in which a detection direction is a forward direction and a reverse direction in a 1 grip band and 1 counter housing, there is a method of mounting on a 1 grip maximum detection band.

As shown in FIG. 4, one counter housing 29 is placed in the same direction as the vertical direction GL of the racket gut surface G (most of the impact receiving directions are substantially the same as Pf), and the grip maximum detection zone a2 on the grip outer periphery on the same surface. Then, the detection direction Sf of the counter housing 29 is aligned with the vertical direction GL of the gut surface, and the grip band 5 is wound around the grip band 5 and attached to the grip band 5 at the position. Next, another counter case 39 of the same type as the above is used in the grip maximum detection band b3 (opposite to the grip maximum detection band a2) in the vertical direction GL of the racket gut surface G, and the detection direction of the counter case 39 is detected. Sb is aligned with the vertical direction GL of the gut surface G, and the grip band 5 is wound around and attached to the grip band 5 on the front and back of the grip band 5 at that position. The two counter housings will be installed at opposite positions on the opposite side, 180 degrees apart, with the grip periphery.

FIGS. 1 and 8 are counters for determining the number of hits mounted on the same grip maximum detection zone on the outer periphery of the grip, with the detection direction axes of the two counters being opposite to each other.

FIG. 2 shows a batting number identification counter in which two counter housings are fixed on one grip band. On the plane, the detection direction is the same direction, but if they are attached to the outer periphery of the grip, they will be in opposite directions, so they are opposite to each other.
FIGS. 3 and 9 are examples of mounting of a hit number identification counter in which two counter housings are fixed on one grip band. One of the two housings is fitted to the grip maximum detection zone for easy one-touch mounting. In addition, there is an advantage that the weight of the front, rear, left and right of the racket is balanced, and the mounting is simple and easy.

As shown in FIGS. 9, 11, and 15, the impact detection sensitivity can be adjusted by changing the mounting angle of the counter housing on the outer periphery of the grip (0 to 90 degrees). This adjustment method is easy.

The above is an example in which two identical sensors (counters) having directionality are mounted so as to sandwich the outer periphery of the grip. Other examples are shown below.

As shown in Fig. 8, the detection axis that constitutes the identification counter is composed of two counter bodies that use the forward and reverse directions, and because it is mounted on the same surface on the outer periphery of the grip, it is easy to mount and the display is easy to see.

FIG. 17 shows an alternator in which a forward direction detection unit 1 and a reverse direction detection unit 2 are arranged in one counter body, and the number of forehand hits, the number of backhand hits, the total number of hits, and the number of hits set are reached. FIG. 3 is a perspective sectional view of a batting number identification counter having main parts such as a gate changeover switch and a reset switch.

FIG. 18 is a block diagram of the hit number discrimination counter described above. The sensor impact signal from both directions of the forward direction detection detection unit 1 and the reverse direction detection detection unit 2 is sent to the calculation unit 103 as an impact electric pulse signal and integrated. Then, the number of impact pulses is stored in the memory unit 104, and the number of hits detected by the detection unit 1 is numerically displayed on the display unit 106 as the number of forehand hits by the switch operation of the display switching unit 105. The number of hits detected by the detection unit 2 is sent as an impact signal pulse to the calculation unit 103 as the number of backhand hits, the pulses are integrated, the number of impact pulses is stored in the memory unit 104, and the detection unit is operated by a switch operation of the display switching unit 106 The number of hits detected in 2 is displayed numerically on the display unit 106 as the number of backhand hits. This switching operation is performed by switching the forehand strike number, the backhand strike number, the total number of strokes, and OFF with the alternate switch. To reset the numerical value, the memory is cleared by the reset switch of the reset unit 107. Since a pair of fasteners are attached to the front and back sides of the grip band, it can be easily attached to the outer periphery of the grip with a single touch, and it is very simple and easy in appearance. In addition, it is very effective because there is little discomfort.

As shown in the block diagram of FIG. 18, when reaching the set number of forehand hits and backhand hits, the trainer is informed with a different kind of notification sound.

As shown in FIG. 12, the detection sensitivity can be adjusted by changing the grip outer peripheral mounting angle of the counter housing from the maximum sensitivity angle. For example, if the counter housing mounting angle is set to 45 degrees, the detection sensitivity is reduced to about 1/2 as shown in FIGS. 13, 14, and 15, and a hit ball can be detected, but a weak hit ball cannot be detected. This means that only the hard hitting ball is selected and counted, and it can be used as a counter for exclusive hitting. If it is set to strong sensitivity, it will be a counter that counts the number of all hits. It is a good tool for tennis technique point practice.

In addition, the detection sensitivity may be adjusted by electrically adjusting the detection output signal of the detection unit.

An identification counter is mounted on the outer circumference of the grip, and due to the impact of striking during practice, the grip band comes loose. It will be necessary to retighten each time. Therefore, when one surface of a pair of fasteners is pasted on the grip outer circumference in advance as the fastener surface 7 in FIG. 10, and tightened with the fastener surface 6 already attached to the back surface of the grip band of the pairing identification counter. Very stable wearing.

A hit number identification hit counter is attached to a grip such as grand golf or hockey ball game, and is applicable.

FIG. 2 is a perspective view of a tennis racket hitting counter in which two grip bands each having a counter housing fixed to one grip band according to the present invention are attached to the grip 1 in directions in which detection directions are opposite to each other. . FIG. 2 is an external view of a striking number discrimination counter in which two counter casings of the same detection direction are fixed on one grip band of the present invention. Fig. 2 is an external view of a grip 1 with a batting identification counter mounted on a grip 1 with a configuration of a grip band and two counters. , FIG. 2 is an external view of a hit number discrimination counter mounted on a grip surface detecting maximum relative surface grip on the outer periphery of a grip in a pair configuration with one counter housing in one grip band of the present invention. FIG. 3 is a block diagram of a batting number identification counter in a two-counter casing configuration. FIG. 3 is an external view showing a detection direction and an impact direction of a counter housing of one grip band. Fig. 2 is an external view of a strike number identification counter in which two detection pairs of one grip band to which one counter casing is fixed are constituted by two detection units in the forward direction and the reverse direction. Consists of two counter housings with one grip band, and a batting identification counter mounted on the maximum detection zone on the outer periphery of the grip Fig. 2 is an external view of a batting number identification counter configured with one grip band and two counter housings in a non-detecting direction. FIG. 4 is a side view of a racket in which a grip fixing band 10 is provided on the outer periphery of the grip and a counter housing is mounted on the grip maximum detection band. FIG. 3 is a side view of a racket in which a counter housing is mounted on a weakly sensitive part of a grip. Is a sensitivity characteristic curve when the forehand sensor F having uniaxial and directional characteristics is placed on the outer periphery of the grip shown in FIG. Is a sensitivity characteristic curve when a uniaxial, directional backhand sensor B is placed on the outer periphery of the grip in FIG. Is a sensitivity characteristic curve up to a sensor angle of 360 degrees when the uniaxial, directional forehand F and backhand sensors B are placed on the outer periphery of the grip in FIG. Is a section taken along the line A-A 'in FIG. FIG. 3 is a cross-sectional appearance view of the striking number identification counters arranged side by side in the single striking number identification counter housing 110 so as to be opposite to each other. 17 includes a detection unit 1 and a detection unit 2 at positions where the detection directions are opposite to each other in one counter housing of FIG. 17, and an arrival hit setting unit is provided in addition to the counter function described above. It is a block diagram of an identification counter that emits a notification sound when reaching.

Explanation of symbols

1 Grip 2 Grip maximum detection zone a
3 Grip maximum detection zone b
4 Grip end 5 Grip band 6 Fastener convex surface 7 Fastener concave surface 8 Gut surface 9 Frame 10 Grip band fixing belt 11 Sensor F
12 Sensor B
19 Frame 20 Detector F
21 Calculation unit F
22 Display F
23 Reset part F
24 Power supply F
25 Counter body F
29 Housing B
30 Detector B
31 Calculator B
32 Display B
33 Reset part B
34 Power supply B
35 Counter body B
39 Housing B
101 detector 1
102 Detection unit 2
103 arithmetic unit 104 memory unit 105 display switching unit 106 display unit 107 reset unit 108 power supply unit 109 counter main body 110 hit number identification counter housing 111 reaching hit number setting unit 112 comparison comparison processing unit 113 reaching sound notifying unit 116 reaching sound notifying unit 117 reaching Strike reset part Pf Impact direction (Forehand side)
Pb Impact receiving direction (backhand side)
Sf Sensor detection forehand direction Sb Sensor detection backhand direction S Power tangent
X_____X '・ ・ ・ ・ ・ X axis
Y_____Y '... Y axis
Z_____Z '... Z axis
GL perpendicular to the gut surface
G Got plane line

Claims (1)

In one counter housing, an uniaxial impact detecting sensor for detecting a hit ball in the forward direction, an uniaxial impact detecting sensor for detecting a hit ball in the reverse direction, and both a forward direction and a reverse direction are provided. a calculation unit for integrating the stroke number values, a memory unit for storing each stroke number value of the bi-directional, a reset unit for resetting each stroke number value of the bi-directional, the bats values of the bi-directional and the display switching unit of the total , A numerical value display unit for displaying each striking value in both directions and the total number thereof, and a power supply unit are provided, the housing is fixedly integrated with a grip band, and the impact direction and the detection direction of the housing are determined. A tennis racket hitting counter capable of being attached and detached with the grip band on the outer periphery of the grip in the same direction.

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