JPS6029159A - Hitting number counter for hitting tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a hit counter for a hitting tool.

(Background Art) In recent years, an extremely large number of people are playing sports to improve their health or as a hobby, and in particular, hitting sports using equipment such as baseball, tennis, badminton, table tennis, and golf have become extremely popular as they are easy for anyone to play. ing. For lovers of these sports, it is important to know the amount of practice required to complete the daily exercise requirement and improve one's technique, or in the case of tennis, exercise such as so-called tennis elbow. It is desirable to accurately know the number of strokes of the pole or shuttlecock in order to prevent the number of strokes from becoming excessive.

However, the reality is that there are no hitting equipment (bats, rackets, clubs, etc.) for the above-mentioned sports that are equipped with a stroke counter function.

(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to use rackets with two guts such as baseball bats, tennis rackets e badminton rackets, table tennis rackets, golf clubs, etc. The object of the present invention is to provide a batting tool that can be applied to all hits such as balls, etc., and can accurately determine the number of hits at all times by detecting the impact force when hitting the ball, etc., with a hit detection sensor installed inside the ball, and displaying a count. .

(Disclosure of invention) The following is the invention according to the drawings? explain.

FIG. 1 shows one tennis racket to which the present invention is applied. This tennis racket 1 has a gut surface 2 that functions as a hitting surface by extending guts to a frame 3 at the tip of the tennis racket, which has a substantially oval shape. The frame 3 and the grip 5 are connected by a shaft 4V that transmits vibrations from the hitting surface, and the end of the grip 5 is equipped with a display section, a vibration detection sensor, etc. A grip end portion 6 is provided.

FIG. 2 shows the impact acceleration waveform at the grip end portion 61C when the ball is hit. In other words, the direction of acceleration acts perpendicularly to the gut surface 2, and the 10 direction indicates the direction of the ball. The first velocity waveform in this period is a decaying waveform of a sine wave, and in this case, the maximum acceleration value is approximately 200 G, and the impact duration (T) is ζ40fn5ec″c.This acceleration value and the impact duration ‘l″t1 The strength of the sword that hits the ball, the position of the ball where it hits the gut surface 2, the gut tension, or the structure and material of the vibration transmission part (frame 3, shaft 4, grip 5) from the gut surface 2 to the grip end 6, etc. of the racket. It also depends on the difference.

However, although there are differences in the above degree, the acceleration waveform is generally as shown in Figure 2, and the maximum acceleration value is between +60G and +30G.
0G, impact duration T = 30 to 50 m sec. It is false, the maximum acceleration value of the vibration acceleration waveform of the grip end during practice swing shown in Figure 3 is approximately 10G, vibration duration (T') L; clearly different from 250 msec.

However, in order to detect and count all the number of strokes, the second
It is sufficient to output a count of 71 acceleration waveforms as shown in the figure. To do this, detect the first positive (or negative) acceleration ai of the acceleration waveform shown in Figure 2, and either do not detect a sound below the second positive (minimum negative) acceleration, or do not output a count even if it is detected. All you have to do is prepare the means.

Figures 4 through 6 show an embodiment specifically showing the above-mentioned means. In this embodiment, a vibrator is disposed inside the grip end, and the vibration tray of the vibrator is mechanically counted when the racket hits the ball. Can you configure it to show the number of hits of the ball?
rl (VC).

That is, the grip end portion 6 is provided with a reverse tapered portion 7 for use in swinging out, and the inside of the cylindrical case 5a along the length direction of the grip 5 is made of polyacetal resin,
A vibrator 9 made of nylon resin or the like and having eight weights made of brass or the like at its tip is arranged so as to be able to vibrate freely by an ankle shaft 10VC.

The weight of this oscillator 9! At 1118, there is a piston 12 connected to the connecting rod 11. b- Dashpot 14 consisting of a cylinder 13 in which a machine piston 12 slides;
It is well arranged. In addition, on the other end side of the vibrator 9, a fork 15 is connected in a bifurcated manner at n7, and this fork 15 moves in response to the perturbation of the vibrator 9 through the pallet shaft 102 [7]. It is possible. The tip of the pallet anchor 15 is arranged to mesh with the teeth of a rotatable escape wheel 16.

The rotation of the escape wheel 16 is transmitted to the number wheel via a pinion (not shown) used in a well-known electromagnetic counter.

That is, since FIG. 6 shows a counter display MQk provided inside the grip end portion 6, the escape wheel 16
is appropriately connected to a display section 17 consisting of a character wheel transmission mechanism. This character wheel transmission mechanism has number wheels 18 to 20 corresponding to a plurality of digits arranged on the same axis. Also, 2
1 is a reset button covered by a waterproof rubber button cover 22, which can be slid downward. Note that this reset button 21 is also embedded inside the end surface area of the grip end portion 6 to prevent it from being pressed inadvertently. In addition, the number vehicle row is grip end surface 6
They are arranged in the grip end 6 facing the magnifying lens 23 provided with aVC.

Therefore, the dashpot 14 has a cylinder 13
The piston 1 is filled with fL/ and air or machine oil, etc.
This is for damping the movement of the vibrator 9 by the viscous resistance ttC that occurs when the piston 2 moves through the gap between the piston 12 and the wall of the cylinder 13.

The structure of this dashpot 14 is detailed in the fifth section.
As shown in FIG.
Air flows in and out through the three resistors, or through the orifice hole 12a' as shown in Figures 14a and 14a, which are hollow bellows dashbots made of thin rubber as shown in Figures 14a and 14a. It is also possible to make full use of the viscous resistance.

Next, the dynamic state of the counter circuit configured as described above (
11-To explain, when the ball is hit back, Fig. 8 (
The impact acceleration as shown in a) is caused by the grip end 6
, and the vibrator 9 rotates as shown in FIG. 8(b)? do. In this case, dashpot 14 or 14 a
If the viscous resistance of is small, 1 as shown in (a)
To the batted ball in the inning! : 172 times to 3 times count area (
In some cases, the pallet wheel 15 rotates in a rotational range that only moves the escape wheel 16 i 1/2 pitch, and the number wheels 18 to 2o are displayed as 2 or 3. However, if the working fluid, the gap between the cylinder 13 and the piston 12, or the orifice diameter are set to an appropriate value, and the damping ratio is set to 0.4 or more, the result changes to Figure 8(b). As shown, the rotation of the vibrator 9 can be fully controlled so that it rotates once into the counting area, and the first signal sound counter section is constructed to detect the vibration.
can be counted.

FIG. 7 shows a second embodiment of the present invention. In this second embodiment, the grip end portion 6 is
This is a stroke counter that has a vibrator disposed inside the racket and is configured to detect and display the vibrations of the vibrator when a ball is hit by a racket using a Hall element and a magnet.

That is, in the case 5a, a magnet 24 is provided on one side of the weight 8 of the vibrator 9, which is configured in the same manner as in the previous embodiment. The rotation of the vibrator 90 is centered around the vibrator axis 9ai, and stoppers 25 are provided on the left and right sides to limit the total rotational amplitude.

This stopper 25 has a comb V trowel structure with low repulsion elasticity in order to buffer the repulsion when the vibrator 9 collides with it. The rotation of the vibrator 9 is controlled by a vibrator spring 28 which is held in position by one of the spring stoppers 26 provided on the vibrator and an external force spring stopper 27 provided on the case 5a.
It is restored by n. Further, n-
A Hall element 29 is provided opposite the magnet 24V, and the proximity of the magnet 24, fc, 1: the output from the Rehole IC changes.

The output of the Hall element is input to the circuit section and the number of strokes is displayed on the display section.

Next, to explain the entire operating state of this embodiment, when the ball is hit back, an impact acceleration as shown in FIG. 8(a) is generated in the grip end portion 6, and the vibrator 9 is
Rotate as shown in b).

The output of the Hall element or Hall IC at this time is shown in FIG. 8(d). The output waveform of this Hall IC is converted to the first Hall IC output by a comparator 33 (to be described later) and an expansion circuit 34 following it (as shown in Figure 8, the correct number of strokes can be determined. Dashpots 14, 14a' shown in FIGS. 4 and 5
(11-If provided, the Hall IC output will be as shown in Fig. 8(b) (a).9 fL, f-y comparator 33
When processed, the voltage output as shown in FIG. 9(c) is obtained, and the correct number of kneading strokes can be known by counting and displaying the kneading by the counter circuit section.

8i! A complete block diagram of the circuit section of the embodiment shown in FIG. 7 is shown in FIG. In the figure, 30 is a power supply for the Hall element 29, etc., 32 is an amplifier circuit, 33 is a comparator, 34 is an expansion circuit, 35 is a counter circuit, 36 is a reset button, 37 is a reset circuit, 38 is a display drive (b) path, 39 is a display element.

Here, the expansion circuit section 34 is constituted by a monostable multi-by-break circuit and a C-R circuit of a resistor and a capacitor that completely determines the time constant, and in this case, the expansion time is t. is about 50-80 m
It may be set as sec.

Furthermore, the pendulum rotation detection magnet and Hall element 29 used here may be used in combination with other position detection elements (for example, a coil and an iron core, a capacitance, etc.).

In addition, Figure 1O shows an example of displaying the number of strokes for the above two embodiments. (a) is a display example of the first embodiment, and the display section consists of a mechanical counter, while <b) In the display example of the second embodiment, the display section is composed of a 7-segment LED display. Note that the reference numeral 40 in the figure (b) is an electric switch.

(Effects of the Invention) As described above, according to the present invention, a vibrator is disposed within the grip end of a sports equipment such as a racket, and vibrations of the sports equipment when a number of hits are detected mechanically or electrically as the number of hits. Since the count was displayed, how many balls were hit by Paul during play? It is possible to check the optimal amount of exercise and practice according to each player's physical strength and ability, and also has the effect of completely preventing various disorders caused by overexercising.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the racket of the present invention, Fig. 2 is an explanatory diagram of the impact acceleration waveform generated at the grip end of the racket when hitting a ball, Fig. 3 is an explanatory diagram showing the acceleration waveform at the time of practice swing 9, and Fig. 4 The figure shows an embodiment of the present invention for obtaining an impact acceleration waveform when hitting a ball, Figures 5 (a) to (e) are examples of the dashpot mechanism in the same embodiment, and Figure 6 shows the grip end of the present invention. FIG. 7 is a longitudinal sectional view of another embodiment of the present invention, FIGS. 8(a) to (e) are explanatory diagrams of the operation of the present invention, and FIG. 9 is a circuit used in the same embodiment. Block example, Figure 10(a)
, (b) respectively correspond to the first aspect of the present invention. 2 in the second example
An example of how many strokes to play is shown below. 6... Grip end portion, 8... Weight, 9... Vibrator, 9a... Vibrator shaft,
lO: Ankle shaft, 11: Connecting rod, 12: Piston, 13: Cylinder, 14, 14a: Dashpot, 15.
...Ankle, 16...Escape wheel, 24
...Permanent magnet, 25 ...Stopper, 2
6, 27... Spring collar, 28...
- Vibrator spring patent applicant Matsushita Electric Works Co., Ltd. Figure 8 (6) Figure 9 Kibe Figure 10 (a) (b) -

Claims (3)

[Claims] (1) A striking surface, a transmission section that transmits vibrations from the striking surface, a vibration detection sensor provided on this transmission section, a counter section that counts a first signal from this vibration detection sensor, and a second What is the means for not counting all signals below the signal in the counter section? A strike counter for your batting equipment. (2) A patent which is characterized in that the vibration detection sensor consists of a pendulum fully equipped with a weight and a vibrator spring, and the means for not counting signals below the second signal consists of a braking means for limiting the deflection of the pendulum. A strike counter for a striking tool according to claim 1. (3) The month counter for a hitting tool as set forth in claim 1, wherein the means for not counting signals below the second signal comprises means for extending the first signal.