JPH0559749B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a drive control circuit for a motor for a trigger device of a pachinko machine, and in particular, even a single specification synchronous motor can operate in both the Kanto and Kansai frequency ranges. Concerning improvements to enable common use.

<Conventional technology> In recent pachinko machines, most of the ball launches are driven by motors, and for this purpose, synchronous motors are used, which have a long life, high rotational accuracy, and a simple structure. ing.

It is true that synchronous motors are qualified to be widely used in various fields due to the above advantages, but the only drawback is that, as the name suggests, they rotate in synchronization with the AC power frequency. Regions with different frequencies may not be compatible.

Therefore, even if a pachinko machine is equipped with such a synchronous motor, the number of bullets fired per unit time cannot be changed in both the Kanto and Kansai frequency regions, and the speed reduction mechanism etc. Since it would be wasteful to make adjustments, we ended up preparing products with special specifications for each of the products to be shipped to the Kanto area and those to be shipped to the Kansai area, and shipped them separately to avoid mistakes. Ta.

<Problems to be Solved by the Invention> As mentioned above, the synchronous motors for pachinko machines have two specifications: one for the Kanto region with a power frequency of 50Hz and one for the Kansai region with a power frequency of 60Hz. were prepared and used depending on the shipping destination.

However, it would be even better if it were to have a single specification that could be used in both commercial frequency bands. This simplifies the assembly line for pachinko machines and allows the use of a large number of synchronous motors with a single specification, which lowers unit costs and ultimately contributes to lower prices for pachinko machines.

In view of this point, the present invention aims to provide a motor drive control circuit which is a synchronous motor for a specific frequency and can be commonly used in different power supply frequency ranges.

<Means for solving the problem> For example, suppose we have a 50Hz synchronous motor. When the triggering device of the pachinko machine driven by this applies AC power with the predetermined frequency of 50Hz to this synchronous motor,
It is assumed that the configuration is such that the number of shots per predetermined unit time can be obtained.

In such a case, if this explosive device were to be used in the commercial frequency range of 60Hz,
The number of bullets per unit time increases unreasonably.

However, the reason why such inconveniences were considered unavoidable in the past was that the only consideration was to drive the synchronous motor in its original form directly with a commercial AC power supply. This is because the.

On the other hand, if you create a predetermined frequency by chopping the DC power supply and use this to drive a synchronous motor, it will be possible to determine in which commercial frequency range a pachinko machine equipped with the synchronous motor will be used. In both cases, the frequency of such a commercial AC power supply becomes completely irrelevant.

In view of these findings, the present invention provides a motor control circuit for a pachinko machine triggering device having the following configuration.

The pachinko machine has first and second drive current input terminals, and by supplying alternating current to the first and second drive current input terminals, the pachinko machine rotates at a rotation speed corresponding to the frequency of the alternating current. A drive control circuit for a synchronous motor for an explosive device; a DC power source that rectifies a commercial alternating current and generates a DC power supply voltage between both positive and negative terminals; and a frequency suitable for driving the synchronous motor. an oscillation circuit that oscillates a frequency signal; and a first and second drive current input of the synchronous motor to both positive and negative power supply terminals of the DC power supply according to the frequency of the frequency signal oscillated by the oscillation circuit; A drive control circuit for a motor for a triggering device of a pachinko machine, comprising: a switching circuit for periodically and alternately switching terminals;

<Function> In the above-mentioned configuration, the switching circuit generates an equivalent alternating current power supply current according to the frequency of the frequency signal oscillated by the oscillation circuit.

In other words, if the oscillation circuit oscillates a specific frequency signal of 50Hz or 60Hz, during a certain time interval,
For example, during a half cycle of the frequency signal, the switching circuit connects the first drive current input terminal of the synchronous motor to the positive terminal of the DC power supply and the second drive current input terminal to the negative terminal.

However, after a predetermined period of time, e.g. during the next half cycle, the same switching circuit now switches the second drive current input terminal of the synchronous motor to the positive terminal of the DC power supply and vice versa. A state is realized in which the drive current input terminal is changed to the negative terminal, and so on.

Therefore, if this mechanism is repeated over time, even though the original driving energy is obtained from the DC power supply, the AC power supply current specified by the frequency of the frequency signal determined in the oscillation circuit will be reduced. This is equivalent to driving a synchronous motor.

Therefore, in order not to waste the conventional synchronous motor for the time being, for example, when using a synchronous motor for 50Hz, the frequency signal of the oscillation circuit is set to the frequency of 50Hz, and when using a synchronous motor for 60Hz, If you set them to 60Hz and 60Hz, you can expect the same operation as before.

For this reason, in the case of a pachinko machine to which the present invention is applied, even if a synchronous motor of a single specification is used for the triggering device, the problem will occur regardless of the commercial AC frequency, that is, depending on the region. You will always be able to get the predetermined number of bullets without having to do anything.

Also, of course, since the oscillation frequency can be arbitrarily and easily varied, even if it becomes necessary to change the number of bullets per unit time for some reason, if the present invention is applied, the firing device No particular mechanical modification is required, and the problem can simply be reduced to changing the oscillation frequency of the oscillation circuit.

<Embodiment> FIG. 1 shows a preferred embodiment of a motor drive control circuit for a trigger device of a pachinko machine constructed in accordance with the present invention.

This circuit first includes a DC power supply 20 that rectifies a commercial AC power supply and outputs a DC power supply current i+ that is the source of energy for driving the synchronous motor 10.

However, the specific circuit configuration inside this DC power supply 20 itself does not need to be anything special, and a normal rectification method may be used. In this embodiment, the alternating current applied to the alternating current input terminals Tac, Tac is rectified by the bridge rectifier 21 to produce a direct current output at both positive and negative terminals, the negative terminal is grounded as usual, and the positive Corresponding terminals of each circuit system described later are connected to the terminals.

Furthermore, the output of the bridge 21 is further attached to a simple open-circuit type constant voltage circuit 22, and its output VDD is used as a power source at an appropriate level to drive each logic gate, etc., which will be described later. Ru.

Looking at the path of the main DC power supply current i+ from the positive terminal V+, as will be described later, it flows alternately through one of the two divided paths.
The first path is from resistor R1 to transistor Q3.
There is a path leading to , and the second path is the resistance R2
There is a path from to transistor Q4.

As will be explained in detail later, these transistors Q3 and Q4 perform complementary on and off operations with the transistors Q1 and Q2 connected to their emitters, and at the moment both of them are turned on. No, when one is on, the other is off.

Assuming a certain moment here and now, the transistor Q
Assume that transistor Q3 is on and transistor Q4 is off, so that transistor Q1 is off and transistor Q2 is on due to the action described below.

Then, of the DC power supply current i+ applied to one end of the resistors R1 and R2, only the current i1 is generated through the resistor R1, and this flows from the transistor Q3 to one drive current input terminal 11 of the synchronous motor 10 (this After flowing into the motor, the other drive current input terminal
That is, it flows out from the second terminal 12 and takes a route to ground via the transistor Q2. This route is schematically shown in the figure by a series of solid arrows.

Next, consider another instant, and assume that at this time transistor Q3 is off and transistor Q4 is on, so that transistor Q1 is on and transistor Q2 is off.

Then, among the DC power supply current i+ applied to both ends of the resistors R1 and R2, only the current i2 is generated through the resistor R2, as shown by the line of virtual line arrows in the figure, and this current flows through the transistor Q4. After flowing into the second terminal 12 of the synchronous motor 10 and flowing inside the motor in the opposite direction,
It flows out from the first terminal 11 and takes a route to ground via the transistor Q1.

What becomes clear from these operations is that if a set of transistors Q1 and Q4 and transistors Q2 and Q3, both of which are on or off for the same period, are turned on and off alternately at a predetermined period, then Synchronous motor 10 with corresponding alternating current
This means that you can obtain the same result as driving the .

The switching circuit 30, rather than the oscillation circuit 40, is constructed precisely to satisfy these functions.

To simplify the explanation, let us assume that the illustrated synchronous motor 10 is for 50 Hz. In other words, this synchronous motor 1
Pachinko machine triggering device incorporating 0 (not shown)
The frequency of the synchronous motor 10 is 50Hz.
It is assumed that the game ball is configured to fire a game ball at a predetermined number of shots per unit time when driven by an alternating current of .

Accordingly, in this embodiment, the oscillation circuit 40 oscillates a square wave pulse train Sf with a frequency of 50 Hz by adjusting a volume 41 as an oscillation frequency adjusting means. However, this oscillation circuit 4
The specific circuit configuration of 0 itself is not directly defined by the present invention, and may be configured in an arbitrary design by appropriately utilizing known existing technology and commercially available integrated circuit modules. .

The oscillation pulse waveform of this oscillation circuit 40, that is, the waveform of the frequency signal Sf, is schematically shown in FIG. 2. The frequency signal Sf is provided at the input stage of the switching circuit 30 in FIG. For the two timing setting circuits 31 and 32,
It is applied to one side as it is, and to the other side through an inverter 33 with its logic level inverted.

In the case shown in the figure, the timing setting circuits 31, 3
2 each have NAND gates 34 and 35, the first input of which receives the frequency signal Sf as it is or its inverted form, and the second input of which receives the frequency signal Sf or its inverted signal, circuit 3
It receives a signal multiplied by integration by 6 and 37.

The effect of this arrangement will be explained with respect to the first timing setting circuit 31.
As shown in the figure, when the frequency signal Sf oscillated by the oscillator circuit 40 rises to logic "H", this rising transition is immediately captured for one input of the NAND gate 34, but the other input Due to the presence of the integrating circuit 36, the input of the signal is not immediately given as a significance level.

Therefore, as shown in Figure 2, Nando's
When viewed from the output of the inverter 38 (FIG. 1), which is connected to the output of the gate 34 and further inverts its output logic, t1 still remains at the inverter 38 for a while after the transition of the rising edge of the frequency signal Sf.
The output logic of 8 is maintained at "L".

However, depending on the time constant defined in the integration circuit 36, the other input of the NAND gate 34 becomes
When the detection threshold of the NAND gate 34 is reached after a delay of the predetermined time t1, the output of the NAND gate 34 becomes logic "L" for the first time, and accordingly, the output of the inverter 38 also becomes logic "L" for the first time. It becomes “H”.

After that, the frequency signal Sf passes half a period,
When the logic "H" falls to the logic "L", the output of the inverter 38 mentioned above immediately returns to the logic "L", but this falling transition is caused by the output of the inverter 33 on the input side. For the second timing setting circuit 32 receiving the signal, this is the rising edge of the input, so regarding this rising edge, exactly the same operation as described for the first timing setting circuit 31 occurs,
After the rising time, only after a time t2 corresponding to a time constant specific to the integrating circuit 37 provided at one input side of the NAND gate 35 has elapsed,
The output of the corresponding inverter 39 becomes logic "H".

For this reason, both inverters 38 and 3 selectively drive the transistors Q1 and Q2 mentioned above depending on their output logic.
The output of 9 is, as shown well in Figure 2,
When one returns to logic “L” and the other returns to logic “H”
Although there is a slight lag in the time when the signal becomes oscillating, the duty is slightly smaller by t1 and t2, which corresponds to the oscillation frequency of 50 Hz, but turns on and off later than the frequency signal Sf. The pulse trains have a phase difference of 180° from each other.

As mentioned above, the outputs of inverters 38 and 39 directly drive respective corresponding transistors Q1 and Q2 via resistors R3 and R4, respectively, but in addition to this, the outputs of NAND gates 34 and 35 drive Transistors Q6 and Q5 are driven through resistors R6 and R5, respectively, and these transistors Q6 and Q5 constitute an inverted driver stage for transistors Q4 and Q3.

Therefore, after the frequency signal Sf becomes logic "H" as shown in FIG. Since the output logic is "L" and the output logic of the other NAND gate 35 is "H", the transistor Q6 is turned off, the transistor Q5 is turned on, the corresponding transistor Q4 is turned on, and the transistor Q3 is turned on. Also, since the output logic of the inverter 38 is "H" and the output logic of the other inverter 39 is "L", the transistor Q1 is turned on and the transistor Q2 is turned off.

Therefore, the path of the DC power supply current i+ given from the DC power supply 20 at this time becomes the power supply current path i2 shown by the virtual line arrow array in FIG. 1, as described above.

On the other hand, regarding the next half cycle of the frequency signal Sf, after the predetermined time t2 determined in the integrating circuit 37 has elapsed, the above-mentioned transistor is turned on.
All of the off-relationships are reversed, and therefore, as shown by the solid line arrows in Figure 1, the current power supply current i
A power supply current i1 flows in the opposite direction to that of 2.

In this way, the synchronous motor 10 is equivalent to being driven with AC at the frequency determined by the oscillation circuit 40, in this case 50Hz, and conventionally, it is driven directly with the AC power supply current of 50Hz. It will now rotate at the same number of rotations as it was.

Of course, when using a 60Hz synchronous motor, the frequency signal Sf generated by the oscillation circuit 40
All you need to do is set the frequency of oscillation circuit 4 to 60Hz.
If the oscillation frequency adjustment means 41 in the 0 range is used for fine adjustment, the rotational speed of the synchronous motor 10 can also be finely adjusted, and therefore it is also possible to correct deceleration errors in the spring mechanism system.

Furthermore, since it is easy to change the oscillation frequency by a considerable range of variation, even if there is a large change in the number of bullets per unit time, it can be done without any modification to the mechanical system of the bullet device. Of course, there is no need to reload the synchronous motor, and by operating the oscillation frequency adjustment means 41, it is possible to respond to this request immediately.

In this embodiment, configurations that would be desirable to have in an actual pachinko machine are also added to the above-mentioned base component that conforms to the idea of the present invention.

One of them is the addition of a power-on reset circuit 50.

When the power is turned on, the output voltage VDD of the constant voltage circuit 22 changes to this power-on reset circuit 50.
It is applied to one input of the NOR gate 52 inside. However, since the capacitor C1 is also connected to this input, the transition threshold at the input of the NOR gate is not reached until a time corresponding to the time constant determined with the series resistor R7 has elapsed.

Therefore, until then, the output logic of the NOR gate 52 is fixed at "H", and this output is connected to the transistor Q through resistors R8 and R9.
5. From giving it to Q6, the previously mentioned Nando
No matter what logic signals are applied from gates 34, 35, transistor Q
3 and Q4 are both turned off, so that the synchronous motor 10 is not supplied with power supply current in either direction and remains in a stopped state.

In this way, the synchronous motor 10 is prevented from being driven unexpectedly after the power is turned on until each circuit system is stabilized.
After the specified time has passed after the power is turned on, the Noah
One input of the gate 52 becomes a logic "L" as opposed to the above explanation, so this power-on
As far as reset circuit 50 is concerned, its reset command will be cancelled.

However, from this point on, the output of the touch sensor circuit 60, which is additionally configured in this embodiment, has priority over the output of the NOR gate 52.

Although not shown, the above power-on
Of course, reset may be applied to various integrated circuit sections as well as in known and existing electronic circuit technology.

Now, the touch sensor circuit detects the condition and operates the synchronous motor only when the player is operating the trigger handle or grip, and automatically stops it when the player is not operating the trigger handle or grip. The purpose of this circuit is to prevent fraud, such as when a coin or other object is caught in a grip, etc., and then the user removes his/her hand to play the game. However, this circuit itself is already well known and has only been used in commercially available pachinko machines. It is also a long time ago.

However, since the present invention does not even specify the specific configuration of such circuit 60, only the operation will be briefly described here. Also, various detection principles have been proposed, but the one used in this embodiment utilizes the capacitance or AC grounding property of the human body.

First, if the player is not touching the conductive sensing portion 61 provided on the trigger grip or the like with the palm of the hand or fingers F, then the stand is empty or the player is using his or her own hand to play the game. If there is no intention to do so, or if there is an attempt to illegally fire the weapon by holding something in between, the oscillator 62
The oscillation frequency causes the flip-flop 64 to fluctuate at that frequency, so that after passing through the integrating circuit 65, the DC voltage level detected by the diode 66 is applied to the NOR gate 6 which functions as an inverter.
Therefore, the output logic of the NOR gate 67 becomes logic "L", which is applied to the other input of the NOR gate 52 mentioned above.

Therefore, even if the power-on reset has already been released, the output logic of the NOR gate 52 remains at "H", and therefore, both transistors Q3 and Q4 are forcibly turned off by the mechanism described above. It is turned off, and the drive of the synchronous motor 10 is forcibly stopped.

On the other hand, when the player touches the sensing section 61, the output of the flip-flop 64 is fixed at logic "L" due to the level setting relationship, and therefore the output of the NOR gate 67 transitions to logic "H". If the power-on reset has already been released at this time, the output logic of the NOR gate 52 becomes logic "L" at this time.

In this case, one end of the resistors R8 and R9 is grounded, and the other end is equivalent to being connected to the bases of the transistors Q5 and Q6, so the resistor R5, which has one end connected to the bases of the transistors Q5 and Q6, is equivalent to ，
Through R6, the aforementioned NAND gates 34, 35
The logic signal from the synchronous motor 10 comes to have a significant effect, and the synchronous motor 10 starts to be driven by the mechanism described above. In addition,
A volume 63 shown in touch sensor circuit 60 is for sensitivity adjustment.

Although the present invention has been described above with reference to one embodiment, it is of course not limited to this, and arbitrary modifications are possible. For example, other semiconductor switching elements may be used as the switching elements instead of the illustrated transistors.

Also, the transistors controlled by the output from the touch sensor circuit 60 are transistors Q5 and Q via a NOR gate 52 in the case shown.
6. Furthermore, transistors Q3 and Q4 intervened in series with the DC power supply, but by slightly changing the logic circuit system, it is possible to change the transistors Q1 and Q2 to control them, and furthermore, the DC power supply line system can be changed to control transistors Q1 and Q2. Insert a switching element separately and independently into
It is also possible to selectively turn this on and off.

<Effects of the Invention> According to the present invention, by periodically switching the first and second terminals of the synchronous motor to both the positive and negative terminals of the DC power supply, it is possible to convert DC current into AC current. Since the synchronous motor is used as a synchronous motor, it is no different from a case in which an alternating current is applied. In other words, although the results are equivalent to those of conventional AC drive, the present invention allows the bombardment device to be easily applied regardless of the commercial AC frequency, that is, regardless of the region. Even if you use a synchronous motor with one specification, you can always get the predetermined number of bullets.

In addition, since the oscillation frequency can be varied arbitrarily and easily, it can be used not only for fine adjustment but also for synchronous
The motor is not limited to the frequencies that have been used in pachinko machines so far, and a wide range of suitable motors can be found.

Similarly, if it becomes necessary to change the specified number of bullets per unit time for some reason,
If the present invention is applied, there is no particular need for mechanical modification of the bombardment device, and of course there is no need to reload the installed motor, and the problem is simply a change in the oscillation frequency of the oscillation circuit. and can take immediate action.

Furthermore, since a semiconductor switching element is normally used in the switching circuit, it is easy to force the element to perform a predetermined forced operation in conjunction with the touch sensor circuit.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an embodiment of a drive control circuit for a motor for a pachinko machine triggering device according to the present invention;
FIG. 2 is an explanatory diagram of main signal waveforms in the first illustrated circuit. In the figure, 10 is a synchronous motor, 11 is its first drive current input terminal, 12 is its second drive current input terminal, 20 is a DC power supply, 30 is a switching circuit, and 31 and 32 are timing setting circuits. , 34, 35 are Nando Gate, 36, 37
is an integration circuit, 38 and 39 are inverters, 40 is an oscillation circuit, 50 is a power-on reset circuit, and 6
0 is the touch sensor circuit.

Claims (1)

[Scope of Claims] 1. It has first and second drive current input terminals, and by supplying alternating current to the first and second drive current input terminals, rotation according to the frequency of the alternating current is achieved. A drive control circuit for a synchronous motor for a triggering device of a pachinko machine that rotates in number; a DC power supply that rectifies a commercial alternating current and generates a DC power supply voltage between both positive and negative terminals; an oscillation circuit that oscillates a frequency signal with a frequency suitable for driving the synchronous motor; 1. A drive control circuit for a motor for a triggering device of a pachinko machine, comprising: a switching circuit for periodically and alternately switching the first and second drive current input terminals; and;