JP2007282867A - Feed object selector for game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple, highly reliable and low-cost feed object selector for a game machine without using expensive parts such as a microcomputer or complicated software in order to prevent fraudulence using external light. <P>SOLUTION: The feed object selector is provided with a photosensor for using a light projecting element and a light receiving element, receiving the pulse light of the light projecting element by the light receiving element and detecting the presence/absence of a detection object passing through the light projecting element and the light receiving element. For light projecting pulse signals, the duty ratio of High (H) and Low (L) is 1. In a standby state, by detecting non-matching of the light projecting pulse signals and light receiving pulse signals by using an exclusive OR circuit, it is confirmed that the light projecting pulse signals to the light projecting element and the light receiving pulse signals from the light receiving element are continually synchronized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an input selector for a game machine that is used when counting inputs such as coins of game machines and medals of slot machines.

  In a game machine such as a slot machine, a game can be played by inserting medals and coins prior to game play. An optical sensor is used for checking the inserted medals and coins and counting the number of coins.

  Such an optical sensor applies a direct current to the light projecting element, emits flat light from the light projecting element, receives the light by the light receiving element, and changes the light quantity due to light shielding by the input item (medal or coin). One using a pair of light projecting elements and light receiving elements, or using two pairs of similar light projecting elements and light receiving elements, and using these two pairs of light projecting elements and light receiving elements There are sensors arranged in the passing direction, and the latter optical sensor detects the phase difference between the output signals of two pairs of light projecting elements and light receiving elements, and detects the passing direction and number of the input objects (detected objects). .

  The operation of the optical sensor will be described including an unauthorized operation. However, in the light receiving element (for example, photo IC), when the light from the light projecting element (for example, light emitting diode) is received, the output unit may be high or low, Now, the description will be made on the assumption that it becomes high (H).

  FIG. 16 is an external perspective view of a general optical sensor, FIG. 17 is a general circuit diagram of the optical sensor, and FIG. 18 shows an example of the light projection signal and the light reception signal output of the optical sensor.

  The optical sensor 100 includes a light projecting unit 101 having a light projecting element LED, a light receiving unit 102 having a light receiving element PD, and an input (medal, coin, etc.) provided between the light projecting unit 101 and the light receiving unit 102. ) Passage groove 103. In such an optical sensor 100, a current is passed through the light projecting element LED to cause the light projecting unit 101 to emit light. This light is received by the light receiving element PD of the light receiving unit 102, and the output current of the light receiving element PD is amplified by the amplifier 104. After the waveform is shaped by the Schmitt circuit 105, a signal is output via the output transistor Q. In this case, the number of inputs is counted by a signal output when the input passing through the passage groove 103 is shielded from light.

  In addition, fraud currently commonly performed on this type of optical sensor 100 will be described. In this case, as shown in FIG. 19, a fraudulent tool 120 in which a line 122 is inserted into the light-transmitting film 121 with a light-transmitting magic or a light-impermeable tape (not shown) is attached. By inserting / withdrawing the unauthorized tool 120 into / from the passage groove 103 of the optical sensor 100, as shown in FIG. Point, output C at point C), output at the time of withdrawal (output L at point C, point B, point A), a total of six inputs passed through, and the coins, medals, etc. A fraudulent game similar to the one in which an input is input is performed.

  In order to prevent such an unauthorized operation, a measure for detecting the passing direction and the number of inputs using the optical sensor 110 having two pairs of light projecting units 111a and 111b and light receiving units 112a and 112b as shown in FIG. There is also. In this case, with respect to an unauthorized operation by an unauthorized tool (translucent film 131 having opaque light 132 inserted) 130, as shown in FIG. 22, when the unauthorized tool 130 is inserted into the passage groove 113. The phase is reversed between the phase of the output signal (point X) and the phase of the output signal (point Y) when the unauthorized device 130 is pulled out. For example, if the insertion time is the addition number and the extraction time is the subtraction number The number of inputs will be offset. This can be used to prevent a game due to fraud, or after Y point, a signal is drawn from the storage side to the throwing side as a signal, which can be used to detect fraudulent operations. ing.

  Further, as a medal selector for this type of illegal operation, a second medal passing sensor is added below the first medal passing sensor, and only when the first and second medal passing sensors are detected and operated, a proper medal is inserted. Has been proposed (see, for example, Patent Document 1).

  However, recently, unauthorized operations using the unauthorized tool 140 as shown in FIG. The dishonesty tool 140 includes two small chip LEDs 141 and 142 that are light projecting elements, and a pair of light projecting units 111a and 112a of the optical sensor 110 and a pair of light projecting units 111b and 112b. The lead wires 143 and 144 that are attached to the opaque film 145 according to the interval and connected to the respective chip LEDs 141 and 142 are led out of the opaque film 145.

  The dishonest tool 140 is inserted into the passage groove 113 of the optical sensor 110, a pulse current as shown in FIG. 24 is passed through the lead wires 143 and 144, and the chip LEDs 141 and 142 are caused to emit light with a phase difference. An injustice has been made to generate a signal as if it was thrown.

  In order to prevent fraud due to an operation using a fraudulent tool equipped with such a light emitting element, when inserting a fraudulent tool from the medal slot, the insertion sensor does not detect the insertion of the fraudulent tool. Since it is necessary to insert the light emitting element in a light emitting state, the light emission of the unauthorized device is performed by the light receiving unit of the light emission detecting sensor arranged upstream of the arrangement position of the closing sensor and on the same side as the light receiving unit of the closing sensor. A slot machine that determines an abnormality when light emitted from an element is received is disclosed (see, for example, Patent Document 2).

Further, the light projecting unit disposed on the medal take-in side path, the first light receiving unit disposed opposite to the light projecting unit, and the medal from which light from the light projecting unit flows to the first light receiving unit is reflected. The medal insertion is determined by the transition of the light receiving state of the input medal sensor including the second light receiving unit disposed at a position where the reflected light can be received, and the medal flowing upstream from the inserted medal sensor is captured. There has been disclosed a slot machine that determines an abnormality when a detection time by a passage sensor that detects a retracted state of an abutting piece provided so as to retreat out of a side passage has passed a predetermined time (see, for example, Patent Document 3).
JP 2001-17611 A JP 2005-342397 A JP 2005-349044 A

  As described above, since fraudulent use using a fraudulent tool equipped with a light emitting element has been carried out so much, game centers and pachinko parlors have caused enormous damage and have had a great impact on sales. Even if an unauthorized tool using a light emitting element is used, the slot machines described in Patent Document 2 and Patent Document 3 can prevent unauthorized use. However, in the above-mentioned Patent Document 2, it is necessary to provide a light-receiving element for detecting unauthorized insertion, and in the one described in Cited Document 3, a passage sensor using a contact piece must be provided, and the sensor portion is enlarged. The problem of high costs remains.

  This invention has been made paying attention to the above problems, and in order to prevent unauthorized operation using external light, without using expensive parts such as a microcomputer, complicated software, other parts, The object is to provide a simple, reliable and low-cost input selector for game machines.

In order to achieve the above object, an input selector for a game machine according to claim 1 of the present invention comprises an optical sensor comprising a light projecting element and a light receiving element for receiving light from the light projecting element, and In an input selector for an amusement machine that detects the presence or absence of an input that passes between an optical element and a light receiving element,
A pulse oscillation circuit for outputting a pulse signal for driving the light projecting element, and receiving and logically receiving the pulse signal of the pulse oscillation circuit and the light receiving output of the light receiving element, and the light emitting pulse signal When the pulse signal of the light reception output is synchronized with the light projection and light reception period, a signal indicating a standby state is output, and when the pulse signal for light projection is the light projection period, there is no light reception output. And a logic circuit that outputs a signal indicating detection of an input when there is a light reception output during the non-light projection period.

  An input selector for a gaming machine according to claim 7 of the present invention includes a first light projecting element and a first light receiving element that receives light from the first light projecting element. The first light projecting element includes a second light sensor including a light sensor, a second light projecting element, and a second light receiving element that receives light from the second light projecting element. The presence or absence of an input that passes between the first and second light receiving elements and then passes between the second light projecting element and the second light receiving element is detected by the outputs of the first and second light receiving sensors. A pulse oscillation circuit that outputs a pulse signal for driving the first and second light projecting elements, a pulse signal of the pulse oscillation circuit, and a light reception output of the first light receiving element. Receive and process logically, and the pulse signal for light projection and the pulse signal of the light reception output are synchronized in the light projection and light reception periods. When a signal indicating a standby state is output, when the light-receiving output is absent when the pulse signal for light projection is a light-projecting period, and when there is a light-receiving output during a non-light-projecting period, The first logic circuit that outputs a signal indicating input detection, the pulse signal of the pulse oscillation circuit, and the light-receiving output of the second light-receiving element are received and logically processed, and the light-projecting pulse When the signal and the pulse signal of the light receiving output are synchronized in the light projecting and light receiving period, a signal indicating a standby state is output, and when the light projecting pulse signal is in the light projecting period, the light receiving output is And a second logic circuit that outputs a signal indicating detection of an input when there is a light reception output during a non-projection period, and when the first logic circuit and the second logic circuit are provided. The presence or absence of a predetermined input is detected based on the output

  In the input selector of the present invention, it is preferable that the duty ratio of High (H) and Low (L) is 1: 1 for the light projection pulse signal output from the pulse oscillation circuit.

  In the present invention, the logic circuit, the first logic circuit, or the second logic circuit is an exclusive OR circuit, and the pulse signal for light projection and the pulse signal for the light reception output have logic values. It is preferable that mismatch detection is performed in different states, and a signal indicating a standby state is output based on the detection.

  In the present invention, the logic circuit, the first logic circuit, or the second logic circuit receives a light reception signal from the light receiving element during a period in which the light emitting pulse signal is not light emitting. It is preferable to output a signal indicating the presence of unauthorized input.

  In the present invention, a phase adjustment circuit for delaying a pulse signal is provided between the pulse oscillation circuit and the logic circuit or the first logic circuit and the second logic circuit, and It is preferable that an optical pulse signal is input to the logic circuit, the first logic circuit, or the second logic circuit via a phase adjustment circuit.

  In the present invention, the delay of the light projection pulse signal of the phase adjusting circuit can be delayed in time at the rising edge of the pulse signal.

  In addition, the delay of the light projection pulse signal of the phase adjustment circuit can also delay the time at the falling edge of the pulse signal.

  In addition, the delay of the light projecting pulse signal of the phase adjustment circuit can also delay the time at the rise time and the fall time of the pulse signal.

    In the input selector for game machines according to the present invention, each circuit unit such as a light projecting element, a light receiving element, a logic processing circuit, and an output circuit is preferably housed in a single case.

  According to the present invention, a pulse oscillation circuit that outputs a pulse signal for driving the light projecting element, a pulse signal of the pulse oscillation circuit, and a light reception output of the light receiving element are received as input and logically processed to project light. When the light pulse output signal and the light reception output pulse signal are synchronized in the light projection and light reception period, a signal indicating a standby state is output, and when the light emission pulse signal is in the light emission period, the light reception output is In the case of no, a logic circuit that outputs a signal indicating input detection is configured, and an expensive microcomputer or the like is not used, so that an inexpensive and small input selector can be provided.

  In addition, the light projecting unit is driven by the pulse signal, and the standby state is confirmed and the input is detected by logical processing of the pulse signal and the pulse signal of the light reception output, so that the frequency of the pulse signal is increased. Thus, the received light pulse can be monitored with a high-speed pulse signal, and illegal play can be completely prevented. In addition, since the circuit is simple, high reliability in operation can be obtained.

  Hereinafter, the present invention will be described based on embodiments. However, since the input selector for game machines according to the present invention is characterized by a circuit, the following description will be focused on the circuit.

  An example of the circuit of the input selector for game machines according to the embodiment is shown in FIG. In this embodiment, the input selector for a game machine drives a pair of light projecting unit 1 and light receiving unit 2, pulse oscillation circuit 3, and LED 11 of light projecting unit 1 in accordance with a pulse signal from pulse oscillation circuit 3. The light projecting drive circuit 4 for performing the above operation, the phase adjusting circuit 5 for adjusting the phase of the pulse signal from the pulse oscillating circuit 3, the output signal PO of the light receiving unit 2 and the pulse signal of the pulse oscillating circuit 3 are input via the phase adjusting circuit 5 An exclusive OR circuit (element U4) 6 that receives the received signal as both input signals, a detection circuit 7 for detecting and smoothing the output of the exclusive OR circuit 6, and the output of the detection circuit 7 and a reference voltage And an output circuit 8 including a comparison circuit COM1 for outputting a signal. Each circuit unit shown in FIG. 1 is housed in a single case, for example, like an optical sensor shown in FIG.

  The pulse oscillating circuit 3 includes an inverter oscillating circuit that is generally well-known by inverters U1, U2, U3, resistors R1, R2, and a capacitor C1. The oscillation frequency is regulated by the charge / discharge time constant of the capacitor C1 and the resistor R2. The oscillation frequency of this oscillation circuit is selected to be higher than the commercial frequency, and specifically, is set to several hundred HZ to several tens KHZ. Incidentally, the resistor R1 is a reverse voltage protection resistor at the input portion of the inverter U1 by the capacitor C1.

  Note that the pulse signal of the pulse oscillation circuit 3 is high (H) and low (L) in order to increase the S / N ratio and reliability because of the use of high (H) and low (L) signals in logic processing. It is preferable that the duty ratio of (L) is 1: 1. Therefore, here, the pulse oscillation circuit 3 configured simply and inexpensively is used, and the duty ratio of high (H) and low (L) is 1: 1.

  When the clock pulse signal CL of the pulse oscillation circuit 3 is high (H), a light projecting pulse is applied to the base of the transistor Q1 of the light projecting drive circuit 4 via the resistor R3, and a base current flows, whereby the transistor Q1 Is turned on, a current flows to the LED 11 through the resistor R5, and the LED 11 emits light.

  The photo IC constituting the light receiving unit 2 includes a photodiode 21, an amplifier 22, a Schmitt circuit 23 for waveform shaping, and a signal output circuit 24 including resistors R24, R25, R26 and a transistor Q2. . The phase adjustment circuit 5 is configured by connecting a resistor R7 in parallel to a series circuit of a diode D1 and a resistor R6, and further connecting a capacitor C2 between the parallel circuit and ground, and one end of the parallel circuit is the output of the pulse oscillation circuit 3. The other end of the parallel circuit is connected to one input end (point A) of the exclusive OR circuit 6. As will be described later, the phase adjustment circuit 5 is provided in consideration of the case where the light receiving pulse may be delayed in the light receiving unit 2. If the delay is small, the phase adjustment circuit 5 is omitted. The output unit of the inverter U3 may be directly connected to the input (point A) of the exclusive OR circuit 6. The other input terminal of the exclusive OR circuit 6 is connected to receive the output signal PO of the light receiving unit 2.

  The output of the exclusive OR circuit 6 is detected by the diode D2 of the detection circuit 7, smoothed by the integration of the integration circuit composed of the resistor R8, the resistor R12, and the capacitor C3, and applied to the (−) input terminal of the comparison circuit COM1. Entered. On the other hand, a reference voltage VC obtained by dividing the power supply voltage VCC by the resistors R9 and R10 is input to the (+) input terminal (point D) of the comparison circuit COM1. The comparison result of the comparison circuit COM1 is output from the output terminal P as the signal output OUT. When the voltage input to the (−) input terminal of the comparison circuit COM1 is larger than the reference voltage VC, the output of the comparison circuit COM1 is inverted and becomes low (L). However, when the input voltage to the (−) input terminal is smaller than the reference voltage VC, the output of the comparison circuit COM1 becomes high (H).

  Next, the operation in the circuit of this embodiment will be described. First, the case where the phase adjustment circuit 5 is not connected (not employed) and the clock pulse signal CL of the pulse oscillation circuit 3 is directly input to the exclusive OR circuit 6 will be described (the output of the light receiving unit 2 is the light projection signal). Is assumed to be not delayed).

  When there is no input such as a coin or a medal in the passage groove between the light projecting unit 1 and the light receiving unit 2, the photodiode 21 of the light receiving unit 2 receives the light from the LED 11 of the light projecting unit 1. As shown in FIG. 2, the output PO of the light receiving unit 2 becomes high (H) in synchronization with the period in which the light projection pulse CL is high (H).

  Here, the phase adjustment circuit 5 is omitted, and the clock pulse signal CL output from the inverter U3 is directly connected to the point A of the exclusive OR circuit 6, so that it synchronizes with the clock pulse signal CL for light projection. In the standby state where the output PO (light reception signal) of the light receiving unit (photo IC) 2 is generated, the clock pulse signal CL and the output PO of the light receiving unit 2 are synchronized. For this reason, the output (point B) of the exclusive OR circuit 6 is obtained from the signal waveform diagram of FIG. 2 and the truth value table of the exclusive OR circuit 6 shown in FIG. In either case of high (H) or low (L), low (L), that is, 0V is always maintained, and the output of the detection circuit 7 and the point C are also low (L). Is lower than the reference voltage VC of the comparison circuit COM1, the OUT signal at the output terminal P of the analog comparison circuit COM1 is kept high (H). That is, a high (H) signal indicating a standby state is output from the output terminal P of the output circuit 8.

  When the light from the LED 11 is blocked by the passage of the input material, as is apparent from the truth table of FIG. 3, the output PO of the light receiving unit 2 holds the low (L) during the light blocking, and this low (L ) Is input to the exclusive OR circuit 6, while the clock pulse signal CL is input to the exclusive OR circuit 6, so that the clock pulse signal CL is synchronized with the clock pulse signal CL every time the clock pulse signal CL is high (H). The exclusive OR circuit 6 outputs a high (H) pulse. This high (H) pulse is detected by the detection circuit 7 by the diode D2, charged and smoothed by the capacitor C3 via the resistor R8, and becomes a DC voltage, which is applied to the (−) input terminal of the comparison circuit COM1. The voltage at the (−) input terminal becomes larger than the reference voltage VC, and the output is inverted to low (L). by this. A low (L) signal indicating input detection is output from the output terminal P.

    If the external light due to fraud is irradiated onto the photodiode 21 of the light receiving unit 2, the output PO of the light receiving unit 2 holds high (H) during the irradiation. Then, low (L) and high (H) are input to the other input of the exclusive OR circuit 6 by the clock pulse signal CL, so that the exclusive OR circuit 6 receives the low (L) of the clock pulse signal CL. ), A high (H) pulse is output every time. For this reason, after the output of the exclusive OR circuit 6, the same operation as in the case of the passage of the input is performed.

  As described above, even when illegal external light is applied to the photodiode 21 of the light receiving unit (photo IC) 2, an output signal similar to that of detection of the detected object is output from the output terminal P of the output circuit 8.

  However, when external light is input illegally, the operation takes a long time, so even if the output of the exclusive OR circuit 6 is high (H), a predetermined input such as a medal having a time length of 20 to 50 mS is obtained. Since the detection signal is much longer than the detection signal, the control unit (not shown) of the game machine compares the length of the detection signal input from the output terminal P with the external light input. Can detect unauthorized operations.

  By the way, since the photo IC of the light receiving unit 2 actually has responsiveness, the photo IC has a delay time of TDH until it receives light and the output becomes high (H). There are various types such as those having a time of TDL until Q1 is turned off and light is lost and the output of the photo IC becomes low (L), or those having a delay time of both (TDH, TDL).

  FIG. 4, FIG. 5 and FIG. 6 show the related waveforms when the above-described delays occur when the phase adjustment circuit 5 is not provided in the detection circuit of FIG. FIG. 4 shows a case where the delay occurs when the output PO of the photo IC changes from low (L) to high (H) and from high (H) to low (L). FIG. 5 shows a case where a delay occurs when the output PO of the light receiving unit 2 changes from low (L) to high (H). FIG. 6 shows a case where a delay occurs when the output PO of the light receiving unit 2 changes from high (H) to low (L).

  As can be seen from FIGS. 4 to 6, if delay processing is not performed on the output PO (light reception signal) of the photo IC of the light receiving unit 2, a delay is generated at the output B point of the exclusive OR circuit 6 due to the delay of the output PO. A pulse having a small pulse width is output by the detection circuit 7 and detected and smoothed by the detection circuit 7 (see the waveform at point C in FIGS. 4 to 6), and input to the (−) input terminal of the comparison circuit COM1. An unnecessary voltage is always applied to the input C point of the analog comparison circuit COM1, and if a noise voltage is added to the input C point, the analog comparison circuit COM1 is liable to malfunction even with a slight noise, and its reliability is lowered. There is a fear.

The phase adjustment circuit 5 is provided to solve this problem. A countermeasure against delay by the phase adjustment circuit 5 will be described. First, a case where the photo IC of the light receiving unit 2 is delayed by both rising and falling (TDH, TDL) of a pulse as shown in FIG. 4 will be described.
In the input selector of FIG. 1, when the output clock pulse signal CL of the pulse oscillation circuit 3 becomes high (H), the phase adjustment circuit charges the capacitor C2 via the parallel combined resistance of the resistors R6 and R7. 5, the voltage applied to the point A of the exclusive OR circuit 6 becomes a voltage having a fixed delay time (see the waveform at the point A in FIG. 7). Further, when the clock pulse signal CL becomes low (L), the voltage charged in the capacitor C2 is the pulse oscillation circuit 3 only through the resistor R7 due to the diode D1 (with the cathode connected to the resistor R6 side). Since the voltage is discharged at the output of the inverter U3, the voltage has a certain delay time (see the waveform at point A in FIG. 7).

  In this delayed waveform, the logical processing functions at the threshold voltage VTH of the exclusive OR circuit 6 which is approximately a half of the power supply voltage VCC. The time of each delayed voltage waveform is set to TDH and TDL, respectively.

  Therefore, the voltage at the point A input to the exclusive OR circuit 6 and the output PO of the light receiving unit 2 are completely synchronized, and the output of the exclusive OR circuit 6 holds a complete low (L). Since the C point is also 0V, it can be made highly reliable with a high S / N ratio. These waveforms are shown in FIG.

  Next, when the photo IC of the light receiving unit 2 is delayed only when the waveform rises as shown in FIG. 5, that is, when it goes from low (L) to high (H), the clock pulse signal CL is similarly Only the rising part needs to be delayed. Therefore, the diode D1 in FIG. 1 may be reversed and the resistor R6 may be short-circuited. In this case, the phase adjustment circuit 5 shown in FIG. 8 is used. In the phase adjustment circuit 5 of FIG. 8, the diode D1 is connected with the polarity reversed from that shown in FIG. 1, the diode D1 and the resistor R7 are connected in parallel, and the capacitor C2 is connected between the parallel circuit and the ground. Is.

  When the photo IC of the light receiving unit 2 is delayed when going from high (H) to low (L) as shown in FIG. 6, the clock pulse signal CL may be delayed only at the falling portion. Therefore, the resistor R6 in FIG. In this case, the phase adjustment circuit 5 shown in FIG. 9 is used. In the phase adjustment circuit 5 of FIG. 9, except for the resistor R6 shown in FIG. 1, the diode D1 has the same polarity as in FIG. 1, and is connected in parallel with the resistor R7, and a capacitor C2 is connected between the parallel circuit and ground. Is.

  The clock signal CL subjected to the delay processing as described above and the output PO of the light receiving unit 2 synchronized therewith are subjected to logical processing by the exclusive OR circuit 6. The output of the exclusive OR circuit 6 is detected by the diode D2 of the detection circuit 7, smoothed by integration by the resistor R8 and the capacitor C3, and input to the (−) input terminal of the analog comparison circuit COM1 as a DC voltage. .

The resistor R8 and the capacitor C3 constitute an integrating circuit, and the function thereof is one of the following a, b, and c.
a) When the setting of the delay times TDH and TDL when there is no input is slightly deviated from the output PO of the light receiving unit 2, the hazard output from the exclusive OR circuit 6 is absorbed (see FIG. 4).
b) When there is an input, the light receiving unit 2 does not receive light, and its output PO becomes low (L), and a high (H) pulse synchronized with the clock pulse signal CL output from the exclusive OR circuit 6 Is smoothed and converted to direct current (see FIG. 11).
c) When external light is applied to the light receiving unit (photo IC) 2 and fraud is performed, the light receiving unit 2 receives light and its output PO becomes high (H), so that the exclusive OR circuit 6 is the same as described above. To invert pulses of the signal corresponding to the timing of the threshold voltage VTH applied to the point A. This pulse is smoothed and converted to direct current (see FIG. 12).

  FIG. 13 shows a signal and truth table of each part in the above various situations.

When there is no input or external light, it is in a standby state. In this state, there is no output pulse from the exclusive OR circuit 6, and the voltage charged in the capacitor C3 is discharged through the resistor R12 to 0V. .
Further, FIG. 10 shows the relationship between the pulses of the respective parts in the normal standby state.

  When the voltage at point A on which the output PO of the light receiving unit 2 and the clock pulse signal CL have been processed is input to the exclusive OR circuit 6, the exclusive OR circuit 6 performs logic operation according to the truth table shown in FIG. It is processed. As can be seen from this truth table and FIG. 10, only the normal standby state is low (L) at point B and point C, that is, 0 V, and the power source voltage is divided by the resistors R9 and R10 to about 1/2. The signal OUT at the output terminal P of the analog comparison circuit COM1 is high (H) because it is lower than the reference voltage VC set at VCC.

  On the other hand, when the input material passes through the passage groove between the light projecting unit 1 and the light receiving unit 2, the same pulse as the clock pulse signal CL is generated at the point B as shown in FIG. The signal is detected by the diode D2, charged and smoothed by the capacitor C3 via the resistor R8, and the DC voltage at the point C becomes high (H). Then, the OUT signal at the output terminal P of the analog comparison circuit COM1 is inverted to low (L), and a detection signal with an input is output.

  Further, when illegal external light is applied, a pulse signal inverted from the clock signal CL is generated at point B as shown in FIG. 12, and this pulse is detected by the diode D2 and charged by the capacitor C3 via the resistor R8. Smoothed, the DC voltage becomes high (H), and is input to the (−) input terminal (point C) of the analog comparison circuit COM1. Since this DC voltage becomes higher than the comparison voltage VC, the analog comparison circuit COM1 inverts the output, the signal OUT at the output terminal P becomes low (L), and a detection signal is output.

  The detection output by the external light and the detection output by the passage of the detection object are also low (L), but when the input is input to the selector, it is detected when it corresponds to the light emission period of the clock pulse. While the signal becomes low (L), the detection output by external light corresponds to the non-projection period of the clock pulse, so that the detection signal becomes low (L). Both can be identified.

  Further, when the input is input to the selector, the input passes through the optical sensor at a constant speed, and therefore the detection output time is determined by the mechanism. The detection output time due to the passage of the detection object is in a certain range of about 10 to 50 mS, and is known in advance.

  Embodiment The pulse oscillator circuit 3 of the input selector has a very high frequency of several hundred HZ to several tens KHZ. For example, when the frequency of the clock pulse is set to 10 KHZ, a pulse signal having a frequency synchronized with this is generated. It is difficult to cheat by turning on a light emitting element that is input from the outside. Even if pulse light of 9.9 KHZ is incident on the frequency of 10 KHZ, a beat signal of 0.1 KHZ is generated with the 10 KHZ signal. As a result, it is almost impossible to succeed in fraud.

    Further, it takes a very long time to align the light receiving portion of the optical sensor with the external light (light from the chip LED), and it cannot be performed in a few tens of milliseconds. Further, by comparing the output time with the passage time of the input that is known in advance, it is possible to identify that it is due to external light instead of the predetermined input.

  In addition, the impermeable film 145 of the dishonest tool 140 as shown in FIG. 23 (in this case, having only one chip LED 142 according to one light sensor) is detected before the chip LED 142. By monitoring the output time, fraud can be easily detected.

  As described above, when a hazard such as that shown in FIGS. 4 to 6 occurs and the S / N ratio may be somewhat deteriorated or the detection speed may be reduced, the resistor R8, By increasing the value of R12 and capacitor C3 to increase the time constant, of course, the phase adjustment circuit 5 can be omitted and the output part of the inverter U3 can be directly connected to the input A point of the exclusive OR circuit 6. Works without problems.

  When the output signal may be inverted, the comparison reference voltage of the analog comparison circuit COM1 can be connected to the (−) input terminal, and the signal part C point from the detection can be connected to the (+) input terminal. .

  Next, FIG. 14 shows an example of a circuit of an input selector for game machines according to another embodiment. This input selector includes an optical sensor having two pairs of light projecting units and light receiving units, and uses an optical sensor of the type shown in FIG. This embodiment selector includes a pair of light projecting unit 1a, light receiving unit 2a, pulse oscillation circuit 3, light projecting drive circuit 4a, phase adjustment circuit 5, exclusive OR circuit 6, and detection circuit 7a. And the output circuit 8a are the same as the circuit shown in FIG. This circuit portion having the same configuration as that of the circuit shown in FIG. 1 constitutes a first input selector circuit 10a.

  This embodiment selector further includes a pair of light projecting unit 1b, light receiving unit 2b, exclusive OR circuit 6b, detection circuit 7b, and output circuit 8b. In the exclusive OR circuit 6b, The output PO2 of the light receiving unit 2b is input, and the clock pulse signal CL of the pulse oscillation circuit 3 is input to the exclusive OR circuit 6b via the phase adjustment circuit 5. The newly added circuit portion includes the pulse oscillation circuit 3 and the phase adjustment circuit 5 to constitute a second input selector circuit 10b. Each circuit unit of the embodiment shown in FIG. 14 is also housed in one case, for example, as an optical sensor shown in FIG.

  In the input selector of this embodiment, the first input selector circuit 10a and the second input selector circuit 10b are the same in operation as the circuit shown in FIG. However, in this embodiment, since the second pair of light projecting units 1b and the light receiving unit 2b are shifted in the inserting direction with respect to the first pair of light projecting units 1a and 2a, the coins An input such as a medal is first detected by the first input selector 10a, and then a passing signal is obtained by the second input selector 10b, so that the input can be reliably detected.

  When an illegal tool as shown in FIG. 23 is used, that is, when external light is added, the frequency of the clock pulse signal of the pulse oscillation circuit 3 is set to several hundred Hz to several tens KHz, For example, it takes a long time to align the light emitting part of the unauthorized device with the two light receiving elements, and a long time output signal is output or synchronized with the frequency of the clock pulse signal CL. For example, if the difference is very small, a beat signal having a difference frequency is output from the output circuit, so that it is possible to notify the unauthorized use, and it is possible to avoid unauthorized use using a light emitting element or the like. .

  FIG. 15 shows the relationship between signals at various parts related to the overall operation of the circuit of the embodiment shown in FIG.

  Further, in the above embodiment, when a predetermined input such as a medal or the like passes through, or when an illegal device LED or the like is inserted, a low (L) signal is output from the output terminal P (Pa, Pb). It is output as a detection signal. Therefore, when the input detection signal is taken in from the output terminal and counted by the control unit of the game machine, the width (time length) of the detection signal is within the set value. If it is within the set value, it is determined that the predetermined input is detected, and if it exceeds the set value, it is determined that it is due to external light.

  However, in the case where it is desired to output only the detection of the input product excluding external light as the detection signal from the output terminal P of the input product selector, for example, a comparison is made between the output terminal of the comparison circuit COM1 in FIG. When the width (time length) of the low (L) signal [detection signal] output from the circuit COM1 is within the set value, if it is within the set value, the predetermined input is detected and exceeds the set value May be provided with a circuit for determining an abnormality due to external light or the like, and the low (L) signal [detection signal] may be output from the output terminal P only when it is determined as a predetermined input.

  As another countermeasure, an AND circuit that takes the logical product of the inverted signal of the clock pulse signal CL and the light reception output PO is provided, and when the external light is input as shown in FIG. When it is high (H) and the inverted signal of the clock pulse signal CL is high (H), the logical product becomes high (H). Therefore, the high (H) output of the provided AND circuit causes the output terminal P to The signal output from may be forced high (H).

It is a circuit diagram which shows an example of the circuit structure of the input selector for game machines which concerns on one Embodiment. It is a figure which shows the signal of each part in case there is no response delay of the output PO of the light-receiving part (photo IC) in the input selector for the game machine. It is a figure which shows the truth table of the signal of each part when there is no response delay of the output PO of the light-receiving part (photo IC) in the input selector for the game machine. In the game machine input selector, there is no delay processing circuit, and the signal of each part when the received light pulse signal PO is delayed at both the rise and fall of the pulse signal with respect to the projection pulse signal is shown. In the game machine input selector, there is no delay processing circuit, and the signal of each part when the received light pulse signal PO is delayed only when the pulse signal rises with respect to the light projection pulse signal is shown. In the game machine input selector, there is no delay processing circuit, and the signal of each part when the received light pulse signal PO is delayed only when the pulse signal falls with respect to the light projection pulse signal is shown. FIG. 5 is a diagram illustrating a signal waveform when the signal of FIG. 4 is processed by a delay processing circuit and an output signal of an exclusive OR circuit logically processed. FIG. 3 is a circuit diagram showing a phase adjustment circuit in the case where the input selector for the game machine is delayed only when a light reception pulse signal PO rises. In the same game machine input selector, it is a circuit diagram showing a phase adjustment circuit in the case of delaying only when the light reception pulse signal PO falls. It is a figure which shows the signal of each part in the normal standby state in the input selector for game machines. It is a figure which shows the signal of each part in case the detection thing exists in the passage groove | channel between a light projection part and a light-receiving part in the input selector for the game machine. In the input selector for game machines, it is a figure which shows the signal of each part at the time of irradiating the external light which concerns on unauthorized operation to a light-receiving part. In the game machine input selector, it is a diagram showing a signal of each part and a truth table in various situations. It is a circuit diagram which shows an example of the circuit structure of the input selector for game machines which concerns on other embodiment of this invention. It is a figure which shows the signal of each part which concerns on the whole operation | movement of the input selector for game machines of the embodiment. It is an external appearance perspective view of a common optical sensor. It is a circuit diagram concerning a conventional example of a general photosensor. In a general optical sensor, it is a figure which shows the light projection signal and light reception signal at the time of detection of an input. It is a figure which shows the example of the unauthorized operation using an unauthorized tool with respect to a general optical sensor. FIG. 20 is a diagram showing a light projection signal and a light reception signal when the unauthorized operation shown in FIG. 19 is performed. It is a figure which shows the example of the unauthorized operation using an example unauthorized tool with respect to the optical sensor which has two pairs of light projection parts and a light-receiving part. FIG. 22 is a diagram showing a light projection signal and a light reception signal and fraud prevention when the unauthorized operation shown in FIG. 21 is performed. It is a figure which shows the example of unauthorized operation using the unauthorized tool of another example with respect to the optical sensor which has two pairs of light projection parts and a light-receiving part. FIG. 24 is a diagram showing a light projection signal and a light reception signal when the unauthorized operation shown in FIG. 23 is performed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a, 1b Light emission part 2, 2a, 2b Light reception part 3 Pulse oscillation circuit 4, 4a, 4b Light emission drive circuit 5 Phase adjustment circuit 6, 6a, 6b Exclusive OR circuit 7, 7a, 7b Detection circuit 8 , 8a, 8b Output circuit PO Photo IC (light receiving element) output COM1 Analog comparison circuit VC Comparison voltage 11, 11a, 11b Light emitting diode (light emitting element)
21, 21a, 21b Photodiode (light receiving element)
CL clock pulse TDH Rise delay time TDL Fall delay time P, Pa, Pb Output terminal

Claims (15)

In an input selector for a game machine comprising an optical sensor comprising a light projecting element and a light receiving element for receiving light from the light projecting element, and detecting the presence or absence of an input passing between the light projecting element and the light receiving element ,
A pulse oscillation circuit for outputting a pulse signal for driving the light projecting element, and receiving and logically receiving the pulse signal of the pulse oscillation circuit and the light receiving output of the light receiving element, and the light emitting pulse signal When the pulse signal of the light reception output is synchronized with the light projection and light reception period, a signal indicating a standby state is output, and when the pulse signal for light projection is the light projection period, there is no light reception output. And a logic circuit that outputs a signal indicating detection of an input when there is a light reception output during a non-light-projecting period.   2. The input selector for a game machine according to claim 1, wherein the pulse signal from the pulse oscillation circuit has a duty ratio of High (H) and Low (L) of 1: 1.   The logic circuit is an exclusive OR circuit, detects a mismatch between the pulse signal for projection and the pulse signal of the light reception output, and outputs a signal indicating a standby state when they are synchronized. 3. An input selector for an amusement machine according to claim 1, wherein the selector is output.   The logic circuit includes a circuit that outputs a signal indicating the presence of an unauthorized input when the light-receiving pulse signal is received from the light-receiving element during a period in which the light-projecting pulse signal is not light-projected. The input selector for game machines according to claim 1 or claim 2.   A phase adjustment circuit for delaying a pulse signal is provided between the pulse oscillation circuit and the logic circuit, and a pulse signal for light projection from the pulse oscillation circuit is input to the logic circuit via the phase adjustment circuit. The input selector for a game machine according to claim 1, 2, 3, or 4.   The said light projecting element, the said light receiving element, the said pulse signal oscillation circuit, and the said logic circuit are accommodated in one case, The claim 1, 2, 3, 4, or claim characterized by the above-mentioned. Item 5. An input selector for an amusement machine according to Item 5. A first light sensor comprising a first light projecting element and a first light receiving element for receiving light from the first light projecting element; a second light projecting element; and the second light projecting element. A second light sensor comprising a second light receiving element for receiving light from the element is juxtaposed, passes between the first light projecting element and the first light receiving element, and then the second light projecting element. In an input selector for a game machine that detects the presence or absence of an input passing between the optical element and the second light receiving element by the outputs of the first and second light receiving sensors,
A pulse oscillation circuit for outputting a pulse signal for driving the first and second light projecting elements;
The pulse signal of the pulse oscillation circuit and the light reception output of the first light receiving element are received and logically processed, and the pulse signal for light projection and the pulse signal of the light reception output are synchronized between the light projection and light reception periods. A signal indicating a standby state is output when the light emitting output is not in the light emitting period and the light receiving output is in the non-light emitting period. A first logic circuit for outputting a signal indicating input detection;
The pulse signal of the pulse oscillation circuit and the light receiving output of the second light receiving element are received and logically processed, and the pulse signal for light projection and the pulse signal of the light receiving output are synchronized in the light projecting and light receiving periods. A signal indicating a standby state is output when the light emitting output is not in the light emitting period and the light receiving output is in the non-light emitting period. A second logic circuit for outputting a signal indicating input detection;
And an input selector for a game machine that detects the presence or absence of a predetermined input based on outputs of the first logic circuit and the second logic circuit.   8. The input selector for a game machine according to claim 7, wherein the pulse signal from the pulse oscillation circuit has a duty ratio of High (H) and Low (L) of 1: 1.   Each of the first logic circuit and the second logic circuit is an exclusive OR circuit, detects a mismatch between the pulse signal for projection and the pulse signal of the light reception output, and synchronizes 9. The input selector for a game machine according to claim 7 or 8, wherein a signal indicating a standby state is output when the game machine is in operation.   The first logic circuit and the second logic circuit output a signal indicating the presence of an illegal input when the light-receiving pulse signal is received from the light-receiving element while the light-projecting pulse signal is not light-projected. 9. An input selector for a game machine according to claim 7 or claim 8, further comprising:   A phase adjustment circuit for delaying a pulse signal is provided between the pulse oscillation circuit, the first logic circuit, and the second logic circuit, and the phase of the pulse signal for light projection from the pulse oscillation circuit is adjusted. 11. The input selector for a game machine according to claim 7, 8, 9 or 10, wherein the input is made to the first logic circuit and the second logic circuit via a circuit. .   The first and second light projecting elements, the first and second light receiving elements, the pulse signal oscillation circuit, the first logic circuit, and the second logic circuit are housed in one case. A selector for a gaming machine according to claim 7, claim 8, claim 9, claim 10, or claim 11.   12. The game machine according to claim 5, wherein the delay of the light projection pulse signal of the phase adjustment circuit delays the time for the pulse signal to go from low (L) to high (H). Input selector.   12. The game machine according to claim 5, wherein the delay of the light projecting pulse signal of the phase adjusting circuit delays the time when the signal goes from high (H) to low (L). Input selector.   6. The delay of the light projecting pulse signal of the phase adjustment circuit delays the time when the signal goes from low (L) to high (H) and from high (H) to low (L). The input selector for game machines according to claim 11.

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