JPS6048764A - Hitting excerciser - 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 batting practice machine for tennis, table tennis, baseball, etc.

[Background technology]

Conventionally, batting practice machines have been used that are equipped with a buzzer, a lamp, or the like to warn when a ball will be hit.

However, the interval between when the buzzer sounded and when the pole was launched was fixed. Therefore, the timing at which the buzzer sounds had to be precisely adjusted during assembly, making assembly extremely troublesome. Furthermore, even if the timing is once adjusted, there is a drawback that the main body must be disassembled and the adjustment must be made again each time the voltage of the power source that drives the batting practice machine changes. This drawback has been a big problem, especially when dry batteries are used as a power source, since the voltage decreases as the capacity of the battery decreases.

[Purpose of the invention]

This invention makes it possible to change the interval from the time of notification of the notification means that foretells the launch of the ball to the launch of the ball, which eliminates timing problems caused by poor adjustment during assembly and drop in power supply voltage. To provide a batting practice machine capable of practicing hitting the ball slowly and rapidly as in a game.

[Disclosure of the invention]

The batting practice machine of the present invention includes a detection switch that detects the launch of a ball, a notification device driven by an input signal from the detection switch, and a notification timing variable device that changes the notification timing of the notification device. It is prepared.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 8. In the figure, reference numeral 1 denotes a casing, in which a pole supply hole 2 is opened on one side of the front part of the top surface, and a ball punching hole 3 is opened from the other side of the top surface to the front side. A handle 4 and a switch 5 are provided at the rear of the upper surface of the casing 1. Inside the casing 1, a pole receiving plate 6, a hitting arm 7, etc., which serve as a means for hitting a ball, are housed.

The pole receiving plate 6 is connected from the pole supply hole 2 to the ball ejection hole 3.
It has a width reaching , and has a slope where the ball ejecting hole 3 side is lower. The pole receiving plate 6 has an arm portion 6a extending rearward from its lower side edge.
The tip is supported by a support shaft 8 on a base frame 9 so as to be vertically movable. The base end of the arm portion 6a serves as a stopper wall 6b, and the tip thereof is bent downward to extend a spring-loaded lever 6C. A switching handle 10 is fixed to the pole receiving plate 6, and the switching handle 10 projects forward from the I/handle engagement hole 11 of the casing 1. The l/nd μ engagement hole 11 has upper and lower engagement notches 11a and llb, and the handle 10 has these upper and lower engagement notches 11a.

11b. In addition, the pole receiving plate 6
A pole support plate 12 is erected on the base frame 9 along the rear edge.

The striking arm 7 is fixed to a rotating shaft 13, and the rotating shaft 13 is supported by a base frame 9 and a gear case 16 by a pair of bearings 14 and 15. 17 and 18 are retaining rings. The striking arm 7 has a striking piece 19 at its tip and a spring-locked pin 20 at its other end.
has. A striking spring 22 is hung between the spring locking pin 20 and the spring locking pin 21 of the spring hanging lever 6C of the pole receiving plate 6. A gear 24 is attached to the rotating shaft 13 of the striking arm 70 via a one-way clutch (not shown).
Gears 26 provided on the motor shafts of motors 2 and 5 are in mesh with each other. The one-way clutch prevents the striking arm 7 from rotating in the reverse direction and freely allows it to rotate in the forward direction (direction of arrow E in FIG. 3). The gear case 16 is fixed to the base frame 9, and the motor 25 is fixed to the gear case 16.

The advance notice means will be explained. Rotation shaft 1 of striking arm 7
An eccentric cam 31 (Fig. 2) is attached to one end of the cam 3, and a strike detection switch SW□ consisting of a microswitch is installed.
turn on and off. The signal from the detection switch SW is input to the circuit section 32, and the timer circuit T (in the circuit section 32) is inputted to the circuit section 32.
(FIG. 7), a buzzer SP serving as a notification means is sounded via a drive circuit O20 and the like.

The timer circuit T is provided with a variable resistor VR, and its resistance value can be adjusted using the knob 33. The volume 30 is attached to the casing 1.

Details of the circuit section 32 will be described later. Note that the starting switch SW is connected to the battery B as shown in FIG. 6, and is also connected to the notification circuit section via the regulator REC.

The operating ball 1vM enters the casing 1 from the pole supply hole 2, rolls on the pole receiving plate 6, and stops at the position where it touches the switch wall 6b. It is launched from. Before launching the ball M, a switch SW detects 70 rotations of the hitting arm.
The system detects this and issues a warning using the buzzer SP. Therefore, the practitioner can prepare by listening to this notification sound. Bo fVM after the buzzer SP warning sound sounds.
The interval until the is struck is obtained by the delay of the timer T, but this interval can be easily changed by operating the variable resistor VR from the outside. Therefore, there is no need to make any troublesome adjustments during assembly.

Further, even if the timing at which the buzzer SP sounds changes due to a decrease in battery voltage due to a decrease in the capacity of battery B, the capacity can be adjusted. Furthermore, the practitioner can freely adjust the interval and practice hitting Po A/M at any speed, just like in an actual match.

The launch operation will be explained. When the switch SW2 is turned on, the motor 25 rotates the striking arm 7 in the direction of arrow E, gradually extending the striking spring 22. When the striking arm 7 rotates to an angle at which the striking spring 22 is fully extended,
Due to the restoring force of the striking arm 7 and the action of the one-way clutch,
The striking arm 7 momentarily rotates at high speed and launches the Bohr 1/M.

Figure 3 shows the lower engagement notch 1 of the switching node/L'IO.
1b and fixes the ball receiving plate 6 downward, the moment the ball is hit/L'M is created. In this case, the arrow C is perpendicular to the angle of the striking arm 7 at this time.
is launched in the direction. In other words, Poe /l/M is launched diagonally forward.

Figure 4 shows the switching hand/l/10 at the upper engagement notch 11j.
It shows a state in which the ball receiving plate 6 is fixed upward by being engaged with the ball receiving plate 6.

At this time, since the striking arm 7 hits the Paw A/M in a substantially horizontal state, the Paw/L/M is launched almost directly above it, as shown by the arrow. At this time, the spring locking pin 21 that defines one end of the impact spring 22 is
As the ball receiving plate 6 moves inward as it moves upward, the deflection length of the impact spring 22 decreases, so the force that launches the ball μM moves forward as shown in Figure 3. It is smaller than when launching.

FIG. 5 shows an example in which this batting practice machine is used for tennis batting practice. The 54th episode shows the case where the ball M is hit forward and the ball M is hit back with a racket of 3 degrees. The ball M hit back to the net 28 supported by Pau p27
The ball is received at Gaitley/l/29 and returns to the ball supply hole 3 of the casing l of this batting practice machine. Figure 5 [F]
1 shows an example in which the ball M is hit directly above and returned with no pound. In this case, since the power to launch Po A/M is weakened, Po μM can only rise to the height shown in the figure, making it easier to practice.

The circuit section 32 will be explained. FIG. 7 is a block diagram of the circuit section 32. In the same figure, D is the detection switch SW.
This circuit removes chattering from the closing signal of the mechanical contact to obtain a falling signal.

The T circuit is a timer circuit that starts operating at the falling edge of the circuit D□, and the timer time ΔT can be varied by the user. D2 is a circuit that detects the timer operation end signal of T□ and generates a signal for operating timer T2;
2 is a timer circuit operated by the falling Q signal from circuit D2, which determines the sounding time of the buzzer SP. O20 consists of an oscillation circuit for operating the buzzer and a drive circuit for driving the buzzer SP. FIG. 8 shows operating waveforms of each part of the block diagram of FIG. 7.

FIG. 9 shows a specific circuit example of the block diagram shown in FIG. Each circuit D, T□, D2. T2. O20 corresponds to FIG. 7, respectively. R□~R8 are resistances, C
1't-C6 is a capacitor. VR is a variable resistor used to adjust the delay time, and IC2 is I for the timer.
C, and when a falling pulse is input to the input terminal T, the timer operation is started. The timer operation time is determined by the resistance values of variable resistor VR and resistor R4, and capacitor c2. It is proportional to the time constant determined by the capacitance of c4. IC
, IC, constitutes an astable multivibrator with I'qAND gate, resistors R5, R6, and capacitor c5. Resistor R7, R8,) transistor Q1s Q2
*Q3 w Capacitor c6 is for power amplifying the output of the fishing stabilizing multivibrator and driving the buzzer SP.

The operation of this circuit section 32 is such that when the striking arm 70 rotates, the detection switch sw□ closes and generates a falling signal, and after using this as input, the timer circuit T operates for ΔT time, and then the buzzer sP sounds for a certain period of time. This notifies the user of the timing of the blow.

Note that the circuit section 32 is not limited to the configuration shown in FIG. 9, and may be any structure provided with a delay circuit that can vary the sounding time from turning on of the detection switch sW□ to sounding the buzzer SP.

Further, although the above embodiments provided a buzzer SP as a notification means, it may be used in combination with a lamp, or only a buzzer SP may be used. Furthermore, the detection switch SW work is the striking arm 7.
However, an ultrasonic switch that detects the presence of the bow A/M may be used as a detection switch for the buzzer SP when launching the bow/l/M.

〔Effect of the invention〕

The batting practice machine of the present invention is capable of changing the interval from the time of notification of the notification means that predicts the launch of the pole to the launch by an external operation, and timing failure due to poor adjustment during assembly or drop in power supply voltage. This problem can be solved, and it also has the effect of allowing you to practice hitting the pole as quickly and slowly as you would in an actual match.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a large-scale embodiment of the present invention, Fig. 2 is a cross-sectional plan view thereof, Fig. 3 is a vertical side view thereof, and Fig. 4 is a longitudinal side view of a different operating state from Fig. 3. Figure 5 is a usage explanatory diagram, Figure 6 is a power supply circuit diagram, Figure 7 is a block diagram of the notification circuit, and Figure 8 is an operating waveform diagram of the notification circuit. Similarly, FIG. 9 is a specific circuit diagram of the notification circuit section. DESCRIPTION OF SYMBOLS 1... Casing, 3... Punching hole, 6... Pole receiving plate, 7... Strike arm, 22... Strike spring, 2
5... Motor, 31... Faith cam, 32... Circuit section, M... Pole, SW... Detection switch, T□
...Timer circuit, SP... Buzzer procedural amendment (voluntary) 1982 Patent Application No. 155616 2, name of invention batting practice machine 3, relationship with the person making the amendment case Applicant's address Osaka Prefecture 1048 Kadoma, Oaza, Kadoma City Name (
583) Matsushita Electric Company representative: Iku Kobayashi 4, agent: 5 Date of amendment order: 1920, month, day Voluntary amendment 6, Subject of amendment (1) Page 3, line 4 of the specification, `` Correct the text "defect" to "defect". (2) On page 3, lines 18 and 19 of the specification, "switch 5" is corrected to "switch sW2." (3) On page 6 of the specification, lines 1 and 2, "Volume 30" is corrected to read "variable resistance VRj." (4) On page 6 of the specification, line 5, "REC" is corrected. There is rR
Correct it to EGJ. (5) In the third line of page 7 of the specification, the phrase "in capacity" is corrected to "easily." (6) On page 6, line 10 of the specification, "of the striking arm 7" is corrected to "of the striking spring 22." (7) Page 8, lines 15 to 16 of the specification, “
"Ball supply hole 3" should be corrected to "Ball supply hole 2." (8) Figures 2 and 4 of the drawings shall be corrected as shown in the attached sheet. (9) Please correct Figure 3 of the drawing by writing it in red on a separate sheet of paper. 1st P Koman

Claims (3)

[Claims] (1) Ball launching means, a detection switch that detects the ball being launched by the ball launching means, a notification means driven by an input signal from the detection switch, and notification of the notification means by the detection switch. A batting practice machine equipped with a notification timing variable means for making the timing variable. (2) Claim M in which the striking means comprises a rotatable striking arm and its driving means, and the detection switch is operated by the rotation of the striking arm before the striking arm strikes. (A batting practice machine listed in No. 11. (3) The notification timing variable means includes a circuit that obtains a falling signal from a signal from which the detection switch closes, and a timer circuit that starts operating on the falling signal of this circuit and can adjust the timer time using a variable resistor. A batting practice machine according to claim 11 or (2) comprising: