JPS61268276A - Ball projector 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 a ball firing device for a pachinko machine, and more particularly to an improvement of a ball firing device for a pachinko machine using a small motor.

(Prior Art) Conventionally, as shown in FIG. 12, the rotation speed of a small motor (4) in a ball firing device of a pachinko machine using a small motor (4) is controlled by a rotation speed control circuit (frequency conversion circuit (19) or - This was done by varying the resistance value of the variable resistor (15) of the next layer pressure control circuit.

This Fig. 12 shows a ball firing device of a conventional pachinko machine, in which a variable resistor (15) is operated by a variable resistor (16) provided in the handle, and a variable resistor (15) is provided in the 8-(17). a slider (18) that moves on a variable resistor,
As the operating lever (17) is rotated, the slider (18)
) is moved on the variable resistor (16) so that the resistance value of the variable resistor (15) can be varied. For this example,
Turning the operating lever (17) clockwise increases the resistance value and increases the rotation speed of the small motor (4). Conversely, turning the control lever (17) counterclockwise decreases the resistance value and lowers the rotation speed. In addition, a cam (5) fitted to the rotating shaft of the small motor (4)
) rotated against the force of the spring (11) pulling the hammer (6), driving the hammer (6) back and forth and firing the pachinko balls (8). In other words, by controlling the rotational speed of the small motor (4), the interval at which the ball is hit by the hammer (6) is controlled, thereby controlling the interval at which the ball is fired by the ball firing device. Note that the microswitch (20) in the figure is a power cutoff switch. Further, the hammer is a load on the small motor (4), which in this case is an irregular load.

An irregular load is a load applied to the small motor (4) during a load period (a period during which the cam (5) of the small motor (4) rotates against the spring (jl) force that pulls the hammer (6)). This means that the no-load period (the period in which the cam (5) of the small motor (4) rotates under no-load condition) alternates.

(Conventional problems) However, the prior art has the following drawbacks.

If the control lever is operated to lower the rotation speed of the small motor (4) in order to lengthen the ball firing interval, the force with which the cam hits the hammer is weak, making it impossible to consistently fire balls, which means that the player A problem arises in that the ball does not fly to the desired location on the game board, and in more extreme cases, the ball stops shooting. Therefore, the present invention allows the ball firing interval to be expanded more than before, and when the ball firing interval is long,
The object is to provide a ball launching device for a pachinko machine that can stably launch balls.

(Means for Solving Problems) The present invention focuses on the fact that the load on the small motor (4), that is, the hammer is an irregular load.

That is, the ball launcher of the present invention includes an electric circuit (2) that drives the small motor (4) at a rated value during at least a load period that includes the time when the cam is released from the hammer;
The present invention is characterized by comprising an electric circuit (3) for driving the small motor (4) under rotational speed control at times other than the above.

By this means, it is possible to shoot balls more stably when the ball shooting interval is longer than in the past.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail by way of example with reference to the drawings. However, the configurations described in this example are not intended to limit the scope of the present invention to only those configurations, unless otherwise specified.
This is just an illustrative example. First, let me give a brief explanation of the drawing.

FIG. 1 is a partially cutaway front view of the entire pachinko machine showing one embodiment of the present invention, and shows the mounting positions of elements constituting a ball firing device.

(1) is an example of the electrical circuit switching mechanism (14);
It is a rotary encoder, and as shown in Figure 4, it is installed integrally with a small motor (4).
) has a function of independently extracting pulse signal outputs corresponding to rotation angles.

(2) is a rated drive circuit, which is an electric circuit that drives the small motor (4) at a rated value.

(3) is a rotation speed control drive circuit, which is an electric circuit that drives the small motor (4) under rotation speed control.

(4) is a small motor, which reciprocates the hammer (6) via a cam (5) fitted to the rotating shaft of the small motor (4), and drives the pachinko ball (6) back and forth with a constant force. 8) Fire. The pachinko ball (8) passes through the launch rail (8), which is the launch path, and the guide rail (34), and reaches the game board surface (j
O).

FIG. 2 is a circuit diagram of this embodiment. Small motor (4)
The hammer (6) is reciprocated via the cam (5).

At this time, the small motor (4) is driven by an electric circuit switching mechanism (14) between the rated drive circuit (2) and the rotational speed control drive circuit (3) according to the load that changes depending on the state of the hammer.
).

FIG. 3 is a front view showing a ball launcher using a rotary encoder (1).

FIG. 4 is a perspective view showing the installed state of the rotary encoder (1). FIG. 5 shows a front view showing the load period (21) and the no-load period (22) of the small motor (4).

FIG. 6 is a waveform diagram showing the pulse signal output waveform from the rotary encoder.

FIG. 7 is a waveform diagram showing a rectangular wave signal output waveform from the signal processing circuit.

FIG. 8 is a waveform diagram showing rectangular wave signal output waveforms from relays A and B drive circuits.

Now, referring to FIG. 5, the operation of controlling the rotation of the small motor in the ball launcher of the present invention will be specifically explained below.

First, in this example, b) Rotary encoder (1) mouth) Signal processing circuit (23) c) Relay A drive circuit (24) 2) Relay B drive circuit (25) E) Relay A (2B) to) Relay B (27) g) Rated drive circuit (2) h) Rotation speed control drive circuit (3) li) Small motor (4) Nu) Hammer (6) It is equipped with

Next, the functions of a) to n) above will be explained.

b) Rotary encoder (1): This is a pulse signal output waveform A corresponding to the rotation angle of the small motor (4).
(28), B (29) (absolute position output) are each independently taken out. (See Figures 5 and 6.) Signal processing circuit (23): As shown in Figure 7, this is the pulse signal output waveform A (2B), B (2
9) are each independently rectangular wave signal output waveform A 1 (30)
, Bi (31) has a function of signal processing. This is a logic circuit using a flip-flop IC.

c) Relay A drive circuit (24): As shown in FIG. It has a function of extracting the wave signal as an output waveform A 2 (32).

2) Relay B drive circuit (25): As shown in FIG. It has a function of extracting the wave signal as an output waveform B 2 (33).

e) Relay A (2B): This is the rated drive circuit (2) with the square wave signal output waveform A 2 (32).
It has a function to turn ON and OFF.

f) Relay B (2?): This has the function of turning on and off the rotation speed control drive circuit (3) using the rectangular wave signal output waveform B 2 (33).

g) Rated drive circuit (2): This is the relay A (2
A circuit that drives the small motor (4) at the rated value by turning B) ON and OFF.

h) Rotation speed control drive circuit (3): This is the
A circuit that controls the circuit by turning B (27) ON and OFF, and controls the rotation speed of the small motor (4) by sliding the variable resistor (15) installed inside the handle.

) Small motor (4): This has the function of reciprocating the hammer (6).

N) Hammer (8): This has the function of launching the pachinko ball (8) from the launch rail (8) onto the game board surface (10).

Next, the mutual relationship between (a) to (n) above will be explained.

a) As shown in Fig. 5, the load period (21) and no-load period (22) of the small motor (4) are independently pulsed using the rotary encoder (1) as shown in Fig. 6. The signal output waveforms are extracted as A (28) and B (29).

b) As shown in Fig. 7, the independently extracted pulse signal output waveforms A (28) and B (29) are input to a signal processing circuit (a logic circuit using a flip-flop IC), and each As independent outputs, a rectangular wave signal output waveform A I (30), a rectangular wave signal output waveform B1 (31
), the signal is processed and extracted.

C) As shown in FIG. 8, the square wave signal output waveform A1 (
30) and B l (31) are independently voltage amplified by relay drive circuits (24) and (25).

d) Voltage amplified rectangular wave signal output waveform A 2 (32
), the relay A (28) is ONI, the rated drive circuit (2) is activated for the load period (angle) (21), and the small motor (4) is driven at the rated value. In addition, relay A
In this case, the terminals (2B) are N, O, (normally open)
Use the terminal.

e) Next, after the end of the load period, the voltage amplified square wave signal output waveform B 2 (33) is transferred to relay B (27).
is turned on, the rotation speed control drive circuit (3) is activated for a no-load period (22), and the small motor (4) is driven under rotation speed control.

Note that the terminals of relay B (27) are N, 0 in this case.
Use the ゜ (normally open) terminal.

f) After that, the operations described in a) to e) above are repeated.

In this embodiment, the small motor is driven at its rated value during the entire load period, and the small motor is driven under rotational speed control during the no-load period; however, as another example, the cam ( The small motor may be driven at its rated value during the load period including the time when the motor 5) leaves the beating machine (6).

This is because by using the rated drive, the repulsive force against the spring (11) of the striking machine when the cam (5) leaves the striking machine (6) becomes constant, and as a result, the firing speed of the method becomes constant. Because it will be. During periods other than those mentioned above, the small motor may be driven by controlling the rotational speed.

It should be noted that in addition to what is shown in the above embodiments, an electrical circuit switching mechanism (
14) may be a mechanism using a microswitch or a rotary switch. Moreover, a -order voltage control circuit may be used instead of the frequency conversion circuit (18) as the one-rotation speed control drive circuit.

As another example, let us consider a case where a microswitch is used as the circuit switching mechanism.

An example of using a microswitch will be described below based on FIGS. 9, 10, and 11. FIG. 9 is a front view of a ball launcher using a microswitch as a circuit switching mechanism, and FIG. The figure is a partially enlarged view of FIG. 9, and FIG. 11 is a perspective view showing the outer shape of the cam. In the case of this embodiment, the microswitch C is connected to the cam as shown in FIGS. The relay C is turned ON and the cam drives the motor at the rated value during the period after the cam turns the micro switch D to 0.

During periods other than the above, that is, after microswitch D is turned on, microswitch C is turned on. The period until H is
The motor is driven at a rotational speed M using a frequency conversion circuit or a negative voltage control circuit. In this embodiment, the shape of the cam is as shown in FIG.

In the case of this embodiment, the unit price of the microswitch is lower than that of the previous embodiment (using a rotary encoder), so
The manufacturing cost of the ball launcher is reduced.

(Effect of the invention) As described above, the present invention provides the following effects.

■ Conventionally, when the ball firing interval was long, the motor torque value decreased and the cam could not rotate against the hammer, causing the motor to stop or become unstable.However, with the structure of the present invention, For example, during a load period that includes at least the time when the cam leaves the hammer, the cam of the small motor is rotating against the spring force that pulls the hammer.
Since the motor is driven at the rated speed, stable ball launch is possible. In other words, the ball can always be fired stably to the desired location on the game board.

(2) During the load period, at least during times other than the load period including the time when the cam leaves the hammer, the motor is driven under rotational speed control, so that the ball firing interval can be greatly expanded compared to the conventional method.

By making this possible, the player can enjoy the game while freely adjusting the firing interval in the same way as with a manual ball firing device.

■ As a means of controlling the rotation speed, for example, it is possible to completely stop the motor rotation by turning off the power to the motor, but in this case, the power must be turned on and off repeatedly. However, it has the disadvantage that it easily generates noise, which adversely affects the control circuit operation of microcomputer-based pachinko machines.

Roughly repeating the ON and OFF operation of the motor is
When starting the motor, an impulse current exceeding the rated value flows, damaging the motor and shortening its life. Therefore, it is necessary to provide an impulse current removal circuit. In this regard, in the present invention, since ON and OFF operations are not repeated,
There are no such drawbacks.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the entire ball firing device for a pachinko machine showing an embodiment of the present invention, FIG. 2 is a circuit diagram of the embodiment, and FIG. 3 is a diagram of the present invention using a rotary φ encoder. FIG. 1 is a front view showing a ball firing device of a pachinko machine in one embodiment. FIG. 4 is a perspective view showing how the rotary φ encoder is installed. FIG. 5 is a front view showing the load period and no-load period of the small motor. FIG. 6 is a waveform diagram showing the pulse signal output waveform from the rotary encoder. FIG. 7 is a waveform diagram showing a rectangular wave signal output waveform from the signal processing circuit. FIG. 8 is a waveform diagram showing rectangular wave signal output waveforms from relays A and B drive circuits. FIG. 9 is a front view showing a ball firing device of a pachinko machine using a microswitch. FIG. 10 is a partially enlarged view of FIG. 9. FIG. 11 is a perspective view showing the outer shape of the cam. FIG. 12 is a front view showing a ball launching device of a conventional pachinko machine. In the figure, (1) is a rotary encoder, (2) is a rated drive circuit, (3) is a rotation speed control drive circuit, (4) is a small motor, (5) is a cam, and (6) is a hammer. , (14)
is an electrical circuit switching mechanism, (15) is a variable resistor, and (19) is a variable resistor.
) is the frequency conversion circuit, (21) is the load period, C22) is the no-load period, (23) is the signal processing circuit, (24) is the relay A drive circuit, (25) is the relay B drive circuit, (26)
is relay A, (27) is relay B, (2nd) is pulse signal output waveform A, (29) is pulse signal output waveform B, (3
o) is the rectangular wave signal output waveform Al, (31) is the rectangular wave signal output waveform Bl, (32) is the voltage amplified rectangular wave signal output waveform A2, and (33) is the voltage amplified rectangular wave signal output. Waveform B2 (35) is microswitch C1 (3G)
is micro switch D. Patent Applicant Sanyo Bussan Co., Ltd. 1s1 Figure 211 4th Flash Figure 10 Figure 11 Figure 12 Figure 111111-

Claims (2)

[Claims] (1) An electric circuit that drives the small motor at its rated value during the load period, which is the period in which the cam of the small motor rotates against the spring that pulls the hammer, and which includes at least the time when the cam leaves the hammer. 1. A ball firing device for a pachinko machine, comprising: and an electric circuit that controls the rotational speed of a small motor at times other than those described above. (2) A ball firing device for a pachinko machine according to claim 1, wherein an electric circuit for rated driving and an electric circuit for controlling rotational speed are electrically switched by a rotary encoder.