JPS61293487A - Hitting apparatus of pinball machine - 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 (Field of Industrial Application) The present invention relates to an electric ball hitting device for a pachinko machine.

(Prior art) In electric pachinko machines, solenoids are used to
The ball is hit, but it is necessary that the ball hitting power can be freely adjusted by the player.

A conventional method for adjusting the batting force is to adjust the current supplied to the solenoid, and a specific method for this is for the player to adjust a variable resistor connected in series with the solenoid by operating a handle. There is something. Also, connect a power transistor in series with the solenoid,
Some use a handle-operated variable resistor to adjust the base current.

(Problems to be Solved by the Invention) In the case where the current supplied to the solenoid is directly adjusted by a variable resistor, the power supplied to the solenoid is adjusted by consuming power by the variable resistor, resulting in wasted power. In addition to consuming a large amount of heat, the variable resistor also generates a large amount of heat, making it necessary to use a large variable resistor. In addition, in the case of using a power transistor, there is no problem of heat generation in the variable resistor or increase in size of the variable resistor, but since power is consumed in the power transistor, power loss and heat generation there are still problems.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention chops the current supplied to the solenoid at a relatively high frequency using a switching element such as a transistor or a thyristor. At least one of the above can be adjusted by operating the handle.

(Function) A solenoid that receives chopped current is
A batting force is generated according to the average value of the current, but since this average value increases or decreases depending on the duty ratio and cycle, the player can adjust the batting force by adjusting at least one of the duty ratio or cycle by operating the handle. can be adjusted. Solenoids have a large inductance, so it takes time for the current to rise after switching, but when chopping, the power supply voltage is directly applied to the solenoid without being dropped by a resistor, so the rise time is short. Therefore, the impact force generated by the solenoid becomes larger when the average current is the same, compared to when chopping is not performed. The effective force for hitting a ball is not an average value but an impact force, so even if the same average current is passed through the same solenoid, a large hitting force can be obtained by chopping.

(Example) FIG. 1 shows an embodiment of the invention.

Reference numeral 1 denotes a rotary solenoid that drives a batting rod (not shown) of a pachinko machine, and is connected in series with a transistor 2 as a switching element and then connected to a DC power source 3. The transistor 2 is turned on and off by a pulsed base current supplied from the AND gate 4.

Reference numeral 5 denotes a first oscillator for determining the batting frequency, which is regulated by law to be less than 100 shots per minute, and is oscillated when the player operates the on/off switch 6 (actually, by operating the handle). , generates a low frequency signal of 100 pulses per minute and applies it to one input terminal of the AND gate 4 as a gate signal. A second oscillator 7 determines the chopping period, and oscillates at a much higher frequency than the first oscillator 5.

The output of the second oscillator 7 is input to a duty ratio determining circuit 8, which provides a rectangular wave signal with a duty ratio designated by a handle 9 to the other input terminal of the AND gate 4.

FIG. 2 shows the operation of the circuit.

When the on/off switch 6 is turned on, the first oscillator 5 oscillates and rises at time T o , T s . . .
Since the low frequency signal C that falls at step .

tel t...rises at °, time t 1 e t 3
The chopping signal S falling at t t S '' is gated, and the output signal a is applied to the base of the transistor 2 .

As a result, the transistor 2 becomes conductive while being chopped at the period t (=tz-to) from time T0 to T□.
It becomes completely non-conductive between times T1 and T2.

One ball is hit during one cycle between times T0 and T2, and this process is repeated thereafter. FIG. 2(A) shows the change in the current i□ flowing through the rotary solenoid 1 within one cycle, and FIG. 2(B) shows the change in the terminal voltage v1. The current 11 has a sawtooth shape due to the chopping effect, but its average value is approximately equal to the current 11 when no chopping is performed.

In the conventional type that does not perform chopping, in order to flow the main current 1, the terminal voltage v2 of the rotary solenoid 1 is lowered to a value v2 lower than the power supply voltage v1, but in the present invention that performs chopping, the terminal voltage v1 is lower than the power supply voltage V1.
It remains □.

i□' indicates a current value assuming that this power supply voltage vi is applied to the rotary solenoid 1 without being chopped, and it rises extremely quickly. Therefore, the rise time for obtaining the same average current is faster for the I-type with chopping than in the 12-type that does not. This is important in a ball hitting device that requires impact force, and the present invention, which has a quick start-up, produces a stronger impact force than the conventional rotary solenoid, which has a slow start-up even when the same average current is passed through the same rotary solenoid. This means that it is possible to give Therefore, the rotary solenoid can be made smaller in order to obtain the same impact force (hitting force).

As the duty ratio determining circuit 8, a monostable multivibrator can be used as an example. That is, the period t of the chopping signal is determined by the second oscillator 7, but the pulse width (ti-tI,), (tx-ti)...
is determined by the metastable period of the monostable multivibrator. This metastable period can be adjusted by making variable the resistance constituting the time constant circuit, which is operated by the handle 9.

FIG. 3 shows the change in the average value of the current main 1 flowing through the rotary solenoid 1 when the duty ratio is changed. (B) From the state shown in @, if the power supply voltage V remains unchanged and the duty ratio is decreased as shown in (A), the average value of the current decreases from 2 to 11. This means that the batting power becomes correspondingly weaker.

Similarly, in Figure (C), as the duty ratio increases, the average value increases and the hitting force becomes stronger.

When adjusting the above duty ratio, transistor 2
The only difference is the on and off periods of transistor 2, and no power is consumed by transistor 2, so there is no power loss and no associated heat generation.Also, there is a variable resistor for adjusting the duty ratio. Since it does not need to consume electricity, it can be small.

The average current of the rotary solenoid 1 changes when the chopping duty ratio remains unchanged and the cycle is changed, and decreases as the cycle becomes shorter. Of course, if the duty ratio is also changed, surface changes will be superimposed. Therefore, in order to adjust the batting force, the oscillation frequency of the second oscillator 7 may be changed, or a branching device may be provided following this, and the branching ratio thereof may be adjusted. You can also use it together.

(Effects) As described above, the present invention chops the current flowing through the ball hitting solenoid and adjusts at least one of its duty ratio or cycle to adjust the average current value, thereby adjusting the ball hitting force. There is no need to cause power loss.

Therefore, power can be saved and heat generation is eliminated, so that the cooling efficiency of the gaming hall is increased. Furthermore, a small variable resistor can be used to adjust the hitting force. Furthermore, as the energizing current of the solenoid rises faster, the impact force as a hitting force increases, efficiency increases, and a car-shaped solenoid can be used, which reduces power consumption.

[Brief Description of the Drawings] Fig. 1 is a system diagram of an embodiment of the present invention, Fig. 2 is a graph showing voltage and current waveforms due to chopping in comparison with those not caused by chopping, and Fig. 3 is a duty ratio. 3 is a graph showing changes in average current as a result of changes in . 1...Rotary solenoid 2...Transistor (switching element) 7...Second oscillator 8...Duty ratio determining circuit Patent applicant: Act Giken Co., Ltd. Managing Director Sadao Ito. Figure 1 Figure 3

Claims (1)

[Claims] A switching element is connected to the energizing circuit of a solenoid that drives a ball batting rod, and the switching element is subjected to chopping control at a cycle faster than the batting cycle, and at least one of the duty ratio or the cycle of the chopping is adjustable. A ball hitting device for a pachinko machine characterized by the following.