JPH05256604A - Detecting device - Google Patents

Abstract

PURPOSE:To detect accurately and simply moving conditions such as a moving direction and the like of a body to be detected such as a pachinko ball and the like. CONSTITUTION:A coil is formed on a circuit board 13, and two detecting portions 10A, 10B, which are composed of oscillating circuits, oscillating using the inductance component of the coil, and switching circuits, are adjacently established. The detecting portions 10A, 10B determine the moving conditions of a body to be detected by the output conditions of the two detecting portions 10A, 10B. The changing orders of the outputs of the detecting portion 10A and the detecting portion 10B are different according to the moving directions when a pachinko ball P passes through a through hole. Thereby the moving direction is detected so as to detect the total number of the pachinko balls P supplied to a pachinko playing board 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact detection device for detecting movement information such as the presence or the direction of movement of an object to be detected made of a magnetic material or a metal material.

[0002]

2. Description of the Related Art Conventionally, as a detecting portion of a detecting device of this type, there is known a detecting portion which utilizes the magnetism or conductivity of an object to be detected to change the circuit constant of an oscillation circuit and detect the proximity thereof. As shown in FIG. 13, when the detected body K enters the magnetic field generated from the oscillation coil L in the high frequency oscillation circuit of several tens kHz, an eddy current flows in the detected body K. The generation of this eddy current causes current loss and consumes the oscillation energy of the high-frequency oscillation circuit, so that oscillation normally stops,
The presence of the detected object K is detected from this oscillation state.

Also, when the object to be detected is a magnetic material,
When the detected object K enters the magnetic field of the oscillating coil L, the interlinkage magnetic flux Φ of the oscillating coil L changes, so that the self-inductance value of the oscillating coil L changes and the high-frequency oscillating condition collapses, and oscillation stops. Similarly, the presence of the detected object K can be detected.

Therefore, if a plurality of such detecting units are provided and the detecting condition is determined based on the oscillating condition of each detecting unit, it is possible to know the proximity condition such as the moving direction and moving speed of the object K to be detected.

[0005]

However, as shown in FIG.
In the detection part of the detection device shown in (1), since it is necessary to provide the oscillation coil L having a relatively large size beside the passage of the detected object K, there is a problem that the entire device cannot be designed compactly. .. In order to know the close condition of the detected body K in detail, it is necessary to provide more detection units on the movement path of the detected body K, and the problem becomes more remarkable. Moreover, in order to know the approaching speed of the object K to be detected, it is not enough to detect that the object K has passed at an approximate position, and so to speak, pinpoint detection is required. In the device, there is a problem that the detection position has a considerable variation, and it is difficult to accurately detect the proximity speed and the like.

Further, since the conventional detecting device is composed of a plurality of oscillating coils L and a circuit board electrically connected to the oscillating coils L, the number of parts is large, the assembling work is complicated, and the reliability is high. There was a problem of low. In particular, when a lead wire or the like is used for electrical connection between the plurality of oscillation coils L and the circuit board, not only the number of assembling steps is increased, but also the connection is wrong and the reliability of the device is lowered. It was If the wiring relationship is incorrect, it may be possible to recognize the moving direction of the detected object K in the opposite direction to the actual direction, and this will greatly affect the reliability of the apparatus.

The detection device of the present invention has been made for the purpose of solving such problems and improving the reliability and the assembling workability, and at the same time, enabling the miniaturization of the entire device, and has the following constitution. ..

[0008]

A detection device of the present invention is a coil formed by a wiring pattern, an oscillation circuit that oscillates by using the inductance component of the coil, and an ON circuit according to the oscillation state of the oscillation circuit. A detection unit including a switching circuit that is turned off, at least two coils of the detection unit are arranged adjacent to each other, and the coils are
A movement information determination unit that is disposed in a passage of an object to be detected and is made of a magnetic material or a metal body, and determines information about the movement of the object to be detected including at least the moving direction of the object from the detection states of the plurality of detection units. It is the gist to provide. Here, the two coils of the plurality of detection units may be realized by circuit patterns formed on the front and back surfaces of the circuit board. It is also preferable as one embodiment of the present invention to form a coil around a through hole provided on the substrate and dispose the through hole in the game ball passage path of the game device.

[0009]

In the detecting device of the present invention constructed as described above, each detecting section operates as follows. If the object to be detected, which is made of a magnetic material or a metal material, does not exist in the vicinity of the coil formed in the wiring pattern on the circuit board (in the through hole when the through hole is provided), the oscillation circuit is It oscillates using the inductance component of. On the other hand, when the detected object is close to the coil (passes through the through hole if there is a through hole) and the detected object is positioned in the magnetic field created by the coil, the self-inductance value of the coil changes or the vortex The oscillation condition is collapsed due to the current loss, the oscillation state of the oscillation circuit changes, and oscillation stops. The switching circuit is turned on / off according to the oscillation state of this oscillation circuit,
A signal is output to the outside according to the presence or absence of the detected object.

The coil of the detection unit is arranged in the passage of the object to be detected, which is made of a magnetic material or a metal body, and the plurality of coils are arranged adjacent to each other. The detection status of changes. Therefore, it is possible to determine the information regarding the movement including at least the movement direction of the detected object based on the signals from the plurality of detection units. In particular, when a through hole is provided to allow the detected object to pass through the through hole, each detection unit can detect the detected object extremely accurately, and pinpoint detection can be performed if the detection accuracy is increased. The accuracy of is improved.

[0011]

EXAMPLES In order to further clarify the constitution and operation of the present invention described above, preferred examples of the detection apparatus of the present invention will be described below. FIG. 1 is a perspective view showing the appearance of the detection unit 10, FIG. 2 is an explanatory view showing the schematic configuration of a pachinko gaming machine 1 equipped with the detection device 2 of the embodiment, FIG. 3 is an exploded perspective view of the detection unit 10A, and FIG. Is a circuit diagram of the detection unit 10, and FIG. 5 is a circuit diagram of the entire detection device. Hereinafter, description will be given with reference to each drawing as appropriate.

In this embodiment, a pachinko ball is the object to be detected, and the detection device is a pachinko ball which is launched toward the game board 3 in the pachinko game table 1 and detects the game situation of the pachinko ball actually used for the game. It was used as a ball launch detection device. This pachinko ball firing detection device is shown in FIG.
The detection unit 10 shown in FIG. 5 and the control circuit 70 as the movement information determination unit shown in FIG. For the purpose of explaining the use of the pachinko gaming machine 1, the detecting unit 1
The description will start from 0. As shown in FIG. 2, the detection unit 10 is in the middle of the launch path 5 in which a pachinko ball launched from a pachinko ball launching device (not shown) jumps out to the pachinko game board 3, and a branch point with the return ball path 9. It is located downstream.

The return ball path 9 (the one-dot chain line in the figure) is returned to the launch path by the return ball when the initial speed of launch from the pachinko ball launching device is insufficient, or by the elastic force of the nail of the pachinko gaming machine. It is configured so that the returned returning ball is guided to the tray 7 and does not hinder the firing of the next pachinko ball. Therefore, the pachinko ball to the detection unit 10 normally passes in the direction from the pachinko ball launching device to the pachinko game board 3,
If the initial velocity of launch is insufficient, the vehicle will pass in the opposite direction.

Next, the structure of the pachinko ball firing detection device 10 will be described. As shown in FIG. 1, the pachinko ball firing detection device 10 has a shape in which two identical detection units 10A and 10B are stacked. The detection units 10A and 10B are
It can be used alone. Here, two of them are stacked and adhered with an adhesive or the like. The pachinko ball firing detection device 10 includes a detector 10A on the pachinko ball firing path.
Is on the upstream side, that is, in the case of a pachinko ball fired by the firing device, the detection unit 10A is arranged to detect it first. The detailed structure of the detection units 10A and 10B will be described. The two detectors 10A and 10B have the same structure, and both detectors 10A and 10B have the same structure in order to avoid duplication of description.
Structures common to A and 10B will be described by omitting reference numerals A and B.

As shown in FIGS. 1 and 3, the detection unit 10 includes
An upper lid 11 and a lower box 12 are provided, and a circuit board 13 is provided inside the combination of both members. The upper lid 11 is provided with a pair of substantially L-shaped L-shaped pieces 21 and 22 and a pair of substantially T-shaped T-shaped pieces 23 (only one side is shown in the figure). Includes a pair of projecting pieces 31 and 32 engaging with the L-shaped pieces 21 and 22, respectively, and a pair of projecting pieces 33 and 34 engaging with the T-shaped piece 23 (only one side is shown in the figure). Is provided. The upper lid 11 and the lower box 12 are engaged with each other by a single touch to form a cubic box body. In addition, the upper lid 11 and the lower box 12,
Through holes 41 and 42 through which the pachinko balls P penetrate are provided respectively.

One end of the circuit board 13 projects out of a box body composed of an upper lid 11 and a lower box 12 thereof, and is used as terminals T1 and T2 for connecting to a control circuit 70 which will be described later. The coil L shown in FIG. 4 is provided on the circuit board 13.
1, electronic components such as the transistors Tr1 and Tr2 are assembled. As shown in FIG. 3, the circuit board 13
Is provided with a through hole 51 of the pachinko ball P at a position communicating with the through holes 41 and 42 when the upper lid 11 and the lower box 12 are combined, and the coil L1 has the through hole 5 thereof.
The wiring pattern 52 has a total of two turns, one turn on each of the front and back sides formed around the circumference of one. The back surface of the double-sided board is a Faraday shield, which prevents noise and prevents the circuit board 13 from malfunctioning.

On the circuit board 13, as shown in FIG.
A power supply terminal T1 to which 2 volts is supplied and a detection terminal T2 are provided. The detection terminal T2 also serves as the ground level of the circuit, and is grounded via the resistor RD on the MPU 72 side. The circuit board 13 has an oscillator circuit C.
O and a switching circuit SW that turns on and off based on the oscillation state of the oscillation circuit CO are provided.

The switching circuit SW has a power supply terminal T1.
The voltage of 12V is applied from the
2 is grounded by the resistor RD (resistance value 680Ω in this embodiment), the power supply voltage of the switching circuit SW (voltage between terminals T1 and T2) is equal to the switching circuit S.
It changes depending on the ON / OFF state of the W transistor Tr2. On the other hand, in the oscillator circuit CO, the Zener voltage Vz (this embodiment) which is stabilized by the resistor R1 (resistance value 27 KΩ in this embodiment) interposed between the power supply terminal T1 and the detection terminal T2 and the Zener diode D1 is provided. About 5.5 Volts) is supplied.

The oscillator circuit CO is a twin transistor Tr in which two transistors having the same characteristics are formed in the same chip.
1 and a capacitor C1 and a coil L1 interposed between one emitter of the twin transistor Tr1 and the ground line, and between the other emitter of the twin transistor Tr1 and an intermediate tap of the coil L1. The resistor R3 and the capacitor C2 constitute a Colpitts type high frequency oscillation circuit. The base of the twin transistor Tr1 is connected to the power supply line via the resistor R2. The oscillation frequency of this oscillation circuit CO is the inductance of the coil L1 and the capacitors C1 and C.
2 and the capacity is about 300 KHz in this embodiment.
Has become.

One of the collectors of the twin transistor Tr1 is not used, but the other is connected to the base terminal of the transistor Tr2 of the switching circuit SW. To the base terminal of the transistor Tr2, the capacitor C3 is connected to the ground line, and the resistor R4 is connected to the power supply line. A resistor R5 (220Ω in this embodiment) is connected to the emitter terminal. The collector terminal of the transistor Tr2 is connected to the power supply line. When the oscillating circuit CO is oscillating, the twin transistor Tr1 is repeatedly turned on and off at about 300 KHz, and when the twin transistor Tr1 is on, its collector current flows from the base of the transistor Tr2 of the switching circuit SW, and the transistor Tr2 is turned on. Turn on Tr2. On the other hand, the oscillator circuit CO
While the bi-transistor Tr1 is turned off for a short time due to the oscillation of, the base current of the transistor Tr2 is continued by discharging and charging the capacitor C3, and the transistor Tr2 is kept in the on state.

When the pachinko ball P, which is a metallic object to be detected, passes through the through hole 51 of the circuit board 13 while the oscillation circuit CO is oscillating, the magnetic flux of the coil L1 causes the pachinko ball P to move.
As a result, an eddy current flows in the pachinko ball P, causing a current loss. The pachinko balls P are usually made of metal, but even if the pachinko balls are made of a material other than metal and have their surfaces plated, a thin film such as a plated film has a small cross-sectional area, resulting in a considerably large eddy current loss. Since the generation of the eddy current consumes the oscillation energy of the oscillation circuit CO, the high frequency oscillation is significantly attenuated and almost stopped.

When the pachinko ball P does not pass through the through hole 51 and is not close to the coil L1, that is, when the oscillation circuit CO is oscillating, the transistor Tr2 is in the ON state, while the oscillation circuit is on. When the CO oscillation is almost stopped, the transistor Tr2 of the switching circuit SW is
Turns off. Since the resistance value of the resistor R5 is smaller than that of the resistor R1 (220Ω: 27KΩ in this embodiment), when the transistor Tr2 is turned on, the current flowing from the power supply terminal T1 to the Zener diode D1 via the transistor Tr2 and the resistor R5. Is larger than the current flowing through the resistor R1 (in the present embodiment, about 130 times). Since this current finally flows to the ground side via the resistor RD connected to the detection terminal T2, the voltage across the resistor RD, that is, the voltage at the input port P of the MPU 72, is when the transistor Tr2 is in the off state. About 0.2 volts,
It will be about 4.9 volts in the on state. Therefore, MPU72
By monitoring the state of the input port P, it is possible to easily know the state in which the detection unit 10 detects the pachinko balls P (low level) and the state in which they are not detected (high level).

As described above, the detection signals from the detection units 10A and 10B are input to the input ports PA and PB of the MPU 72, and the MPU 72 can know the passing status of the pachinko balls in the middle of the launch path. The input port PA,
The PB can be read at once. Figure 5 shows this MP
It is a circuit block diagram of the control circuit 70 comprised centering on U72. This control circuit 70 operates as a movement information determination unit, but at the same time drives and controls the number of rotations of a motor 82 that constitutes the pachinko ball launching device 80, a pachinko gaming console accessory, and the like.

As shown in the figure, the MPU 72 is a one-chip computer having built-in peripheral circuits such as a ROM storing a program in a non-volatile manner and a RAM temporarily storing information. Further, the MPU 72 controls not only the detection signal from the detection unit 10 described above but also the motor driver 74 that adjusts the supply voltage to the DC motor 82 that drives the pachinko ball launching device 80, and is provided in the pachinko game board 3. The various input / output devices 90 are connected to the input / output interface 7
Controlled or monitored via 6. I / O device 90
There are input devices such as a touch sensor that detects the operation of the handle 92, a winning ball sensor that detects a winning ball, various switches, and electrical components such as a solenoid for driving a accessory and a lamp.

Next, a description will be given of an effective sphere count processing routine that realizes the function of processing the detection signals from the detection units 10A and 10B in various programs executed by the MPU 72. FIG. 6 is a flowchart of the pachinko ball firing program. This program is repeatedly processed by the interrupt process at the same time that the MPU 72 starts the energization control of the DC motor 82 when the player detects that the player operates the firing handle 92 by the touch sensor. This repeated processing is executed at sufficient intervals to detect the moving direction of the pachinko balls P. The flags Fn, F in the processing described below
The default value of r and the like is 0.

When this routine is started, the MPU 72
First, a process of reading the states of the ports PA and PB is performed (step S100), and then this state is determined (step S110). When the pachinko ball P passes from the detection unit 10A side, that is, along the normal launch path 5, the detection unit 10A detects the invasion of the pachinko ball P before the detection unit 10B, so that the port PA has a low level (value 0). ), The port PB becomes high level (value 1). In this case, the process proceeds to step S120, and the process of setting the value 1 to the flag Fn is performed (step S120).

On the other hand, when the pachinko ball P enters the detection unit 10 from the detection unit 10B side, the port PB is at the low level and the port PA is at the high level, which is the timing first. In the case where the pachinko ball P enters from the detection unit 10B side, when the pachinko ball P bounces on the nail of the pachinko game board 3 and returns, or the initial speed of the pachinko ball launching by the pachinko ball launching device 80 is small, the pachinko ball P is too small. This occurs when the ball passes through the firing detection device 2 and returns to the firing path 5 without being hit by the pachinko game board 3. In this case, the process of setting the flag Fr to the value 1 is performed (step S130).

The pachinko ball P is a pachinko ball firing detection device 2
Flag Fn depending on which direction
Alternatively, after setting the flag Fr (step S12
0, 130) and whether or not the contradictory flags Fr, Fn have the value 1 is determined (steps S140, 150). Immediately after the pachinko ball P enters the detection unit 10, the contradictory flags Fr or Fn are not set, so M
After resetting the timer built in the PU 72 (t ← 0) (step S155), the process exits to “NEXT” and this routine is once terminated. On the other hand, the pachinko ball P is the detection unit 1.
When passing through 0, or when the detection unit 10 has just returned halfway and returned, both flags will be set. Therefore, the behavior of the pachinko ball P and the state of determination will be described.

The state of the ports PA and PB is detected by the detection unit 10
Based on the outputs of A and 10B, both are pachinko balls P
Assuming that the state in which one is not detected is represented by “11”, the state in which one is detected is represented by “01” and “10”, and the state in which both are detected is represented by “00”, by the behavior of the pachinko ball P, The following five types of changes are possible. When the pachinko ball P is fired and passes normally "11" → "01" → "00" → "10" → "11" When the pachinko ball P returns from the pachinko game board 3 and passes through "11" → “10” → “00” → “01” → “11” When the pachinko ball P comes to the middle of the pachinko ball firing detection device 2 and returns (A) When only the detection unit 10A detects and returns “11” → “01” → “01” → “01” → “11” (B) When both the detection units 10A and 10B detect and return “11” → “01” → “00” → “01” → “11” (C) When only the detection unit 10B detects once and then returns: "11" → "01" → "00" → "10" → "00" →
"01" → "11"

In the case of step S150, the determination in step S150 finally becomes "YES", and the variable CS indicating the total number of shots of the pachinko balls P is incremented by 1 (step S160). In this case, the determination in step S140 finally becomes "YES", and a process of decrementing the variable CS indicating the total number of shots of the pachinko balls P by 1 is performed (step S170). In the case of (C), since the determination in step S150 is once "YES" and the variable CS is incremented, the determination in step S140 is subsequently "YES" and the variable CS is decremented. As a result, the variable CS indicating the total number of shots does not increase or decrease. After the processing of steps S120 to S170, the MPU 72 resets the built-in timer by writing the timer variable t value 0, and starts the processing from 0 (step S155).

In the cases of (A) and (B), step S
The judgments at 140 and 150 are never "YES". In such a case, the pachinko ball P is detected by the detection unit 10.
When the ports are released from, both ports PA and PB eventually become high level (value 1), and the process proceeds to step S180. In step S180, the timer t reset in step S155 determines whether or not the time t1 has elapsed since the last pachinko ball P was detected. If the time t1 has not elapsed, the flags Fn and Fr are set to 0. (Step S190), the process goes to "NEXT" and the present routine is ended. As a result, in the cases of (A) and (B), the flag finally returns to the initial state, and the variable CS indicating the total number of shots does not change.

On the other hand, when it is determined that the time t1 has elapsed, the pachinko ball firing detection device 2 does not detect the pachinko ball P for the predetermined time t1 even though the player operates the firing handle 92. In this case, it can be determined that the pachinko balls P have not been supplied to the saucer or that ball clogging or the like has occurred, so abnormal processing is performed (step S200). For abnormal processing, pachinko game machine 1
It is conceivable to perform processing such as notifying the host computer connected to, or stopping the pachinko ball launching device 80 for a predetermined time.

As described above, according to the pachinko ball firing detection device 2 of the present embodiment, the passing direction of the pachinko balls P can be reliably ensured only by installing this device at one location on the pachinko ball firing path 5. It is possible to identify and reliably detect the total number CS of the pachinko balls P supplied to the pachinko game board 3. The total number CS is reset to 0 every predetermined time,
You may count as a number per unit time. Also,
The pachinko ball firing detection device 2 of this embodiment is a pachinko ball P.
Can be reliably detected without contact. In addition, since the detection unit 10 has the coil L1 configured by the wiring pattern 52 formed on the circuit board 13, it is integrated with the circuit board 13 and the number of components is reduced. Therefore, reliability can be improved. Further, since the number of parts is reduced, the assembling workability is excellent, and in particular, it is not necessary to assemble the coil L1 to the circuit board 13. Moreover, the size of the detection unit 10 is limited only to the size of the circuit board 13 itself, and can be made thin and compact.

In addition, the MPU 72 can be simply configured to measure the time from the setting of the flag Fn to the setting of the flag Fr. In this case, the firing speed of the pachinko ball P is detected. It's also easy.

Next, another embodiment of the present invention will be described. FIG. 7 is a circuit diagram showing a schematic configuration of the second embodiment. As shown in the figure, this detection device uses the detection units 10A and 10B described in the first embodiment as they are,
In the control circuit 70, a detection circuit including a pachinko ball passing direction is provided in hardware. The detection result is MPU7
MPU7 by 2 interrupt input INT and input port PC
2 will be notified.

In this embodiment, the output signals from the detectors 10A and 10B are CMOS type Schmitt triggers 2
01 and 202, and after being waveform-shaped here, both are input to the 2-input NAND gate 204, and the output of the Schmitt trigger 201 is applied to the data terminal D of the D-type flip-flop 205 and the Schmitt trigger 2
The output of 02 is input to the clock terminal CLK of the D-type flip-flop 205. The output of the NAND gate 204 is supplied to the interrupt input INT of the MPU 72 by D
The positive output Q of the type flip-flop 205 is input to the input port PC of the MPU 72.

Detection unit 10A or detection unit 1 of the detection device
When 0B detects a pachinko ball P, as shown in FIG.
The output of the NAND gate 204 becomes high level and the MPU
The interrupt request INT is applied to 72. On the other hand, changes in the outputs of the detection unit 10A and the detection unit 10B have a deviation due to the passage of the pachinko balls P, so the D-type flip-flop 20
The output Q of 5 is the pachinko ball P as shown in FIG.
Is maintained at a low level when passing from the detection unit 10A side to the detection unit 10B side, and is set at a high level in the opposite case as shown in FIG. 8B. Therefore, the MPU 72 that receives the interrupt request receives the input port P after a predetermined time.
By reading the state of C, the passing direction of the pachinko ball P can be known.

According to the second embodiment described above, the same effect as that of the first embodiment can be obtained, and the pachinko ball P can be used in hardware.
Since it is possible to detect the passing direction of the MPU 72, the load on the MPU 72 can be reduced. In this circuit, the D-type flip-flop 205 does not need to be reset or set to the initial state, and the circuit configuration is simple.

Next, a third embodiment of the present invention will be described. Compared to the first embodiment, the detection device of this embodiment is provided with two sets of the oscillation circuit CO and the switching circuit SW on the same substrate, and further has the direction determination circuit DD for detecting the passing direction of the pachinko balls P on the substrate. It was built into. As shown in FIG. 9, this detection device includes a first coil L1A, a first oscillation circuit COA, and a first switching circuit SWA on one surface of a substrate 210 having an opening 209 through which an object to be detected passes. And a direction discriminating circuit DD. Also,
A second coil L2B and a second coil L2B are provided on the back surface of the substrate 210.
The oscillator circuit COB and the second switching circuit SWB are provided.

The electrical construction of the detection device is shown in FIG.
The outputs from the first and second switching circuits SWA and SWB are input to the direction discriminating circuit DD, and the outputs SA and SB of the direction discriminating circuit DD are input to the microcomputer. The direction determination circuit DD includes signals QA and QB from the first and second switching circuits SWA and SWB.
Input Schmitt triggers 211 and 21 for waveform shaping
2, a 2-input NOR gate 214 connected to the outputs of the Schmitt triggers 211 and 212, a D-type flip-flop 21 that operates using the output of the Schmitt trigger 211 as data D and the output of the Schmitt trigger 212 as the clock CLK.
5. AND gates 217 and 21 for masking the output QC of the NOR gate 214 and outputting the negative output Qn and the positive output Qp of the D-type flip-flop 215 as the outputs SA and SB.
It is composed of 8.

The operation of the direction discriminating circuit DD will be described with reference to the timing chart of FIG. As shown in the figure, when the object to be detected passes from the coil L1A side to the coil L1B side, the oscillation of the first oscillation circuit COA stops first, and the output QA of the first switching circuit SWA goes low first. Invert. Then, the second oscillator circuit COB
Stops and the output QB of the second switching circuit SWB is inverted to the low level. Therefore, while both signals fall to the low level, the output QC of the NOR gate 214
Is inverted to high level.

At this time, the D-type flip-flop 215
Operates in the same manner as in the second embodiment, and the detected object moves from the A side to the B side.
When passing to the side, the negative output Qn is at the high level, and as a result, the output SA of the AND gate 217.
Becomes high level only during the period when the output QC of the NOR gate gate 214 becomes high level, and the pulse signal is output only to the output SA. On the other hand, when the object to be detected passes from the B side to the A side, the positive output Qp becomes high level, so that the pulse signal is output only to the output SB of the AND gate 218.

As described above, according to the detection apparatus of this embodiment, the passage of the object to be detected can be detected as the pulse signal output which differs depending on the passage direction. Therefore, for example, the first
If the total number of objects to be detected that have passed in one direction is detected as in the embodiment, the outputs SA and SB may be connected to the count-up input terminal and the count-down input terminal of one up-down counter, respectively. If the number of detection objects that have passed in each direction is to be detected separately, it may be connected to two independent counters. Further, in this embodiment, since the oscillation circuits COA, COB and the like are formed on both sides of the substrate 210 and the coils L1A, L1B are formed on both sides of the substrate 210, the device can be further downsized. Since the coils L1A and L1B are formed on both surfaces of the substrate 210, it is possible to detect the movement of the detected object with extremely high accuracy.

In the present embodiment, the coils L1A and L1B are provided very close to each other, so that it is not always necessary for the object to be detected to pass through the through hole. For example, in the above-described embodiment, the circuit board 210 may be configured such that the through hole is not provided, the portion of the substrate 210 where the coils L1A and L1B are provided is exposed from the case, or this portion is covered with a laminate film or the like. .. In this case, the object to be detected approaches the surface of the substrate 210 on which the coil L1A is provided or the surface of the substrate 210 on which the coil L1B is provided. If the sensitivities of the first and second oscillating circuits COA and COB are adjusted so as to stop the oscillation even when the object to be detected approaches from the back surface of the coils L1A and L1B,
It is easy to detect which surface the object to be detected has approached after the oscillation of the first and second oscillation circuits COA and COB is stopped. Similarly, a plurality of circuit boards each having a coil formed thereon are arranged at positions sandwiching the passage of the object to be detected, and the positions of the coils are shifted by a predetermined distance along the moving direction of the object to be detected. If you don't have a through hole,
The passage of the object to be detected can be detected including the passage direction.

In the embodiment described above, the circuit board 13,
An ordinary printed circuit board made of resin is used as the base material of 210, but instead of this, a highly flexible film-shaped one may be used. With such a configuration, it is possible to provide a circuit board that is further thinned and is less likely to damage the portions around the through holes 51 and 209. Further, it is also suitable for further increasing the detection accuracy of the above-described detection unit 10 in which the object to be detected does not penetrate. For example, it is assumed that a film-shaped printed circuit board is formed into a cylindrical shape or a gutter shape, through which an object to be detected passes, and two or more coils are formed at positions displaced in the passing direction of the object to be detected,
It is also possible to configure the detection device. The detector 10 and the MPU 72 may be formed on the same board regardless of the material of the circuit board.

In some of the above embodiments, coil L1
The wiring pattern 52 forming the wiring pattern has only one turn on the front surface and the back surface. Instead, as shown in FIG. 12, the wiring pattern 61 forming the coil L1 on the circuit board 60 is formed on the surface. It may be formed on the back and two turns each. Of course, a configuration with more turns is also possible.
Further, the number of detecting units is not limited to two, and may be three or more.

The embodiments of the present invention have been described above.
The present invention is not limited to such an embodiment. For example, the circuit board is not stored in a case and is used as it is, and a plurality of through holes are provided on the circuit board to cover any of the through holes. It is needless to say that the present invention can be implemented in various modes without departing from the scope of the present invention, such as a configuration for detecting a detection body when it passes.

The present invention was made by paying attention to the fact that the magnetic flux generated by the coil causes an eddy current in the metal body, or the magnetic material changes the self-inductance of the coil, thereby changing the oscillation condition of the oscillation circuit. The object to be detected may be, for example, a metal other than a pachinko ball, a coin, a part on a production line, a physical distribution product, or the like. In this case, it goes without saying that if a through hole is provided, it will have a shape corresponding to the shape of the object to be detected.

[0049]

As described above, the detection device of the present invention can reliably detect the proximity of a detected object made of a magnetic material or a metal material in the proximity direction without contact.
Moreover, the number of parts of the device can be reduced to improve reliability and assembling workability, and the entire device can be compactly housed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a detection unit 10 of a pachinko ball launch detection device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an arrangement of a detection unit 10 on a pachinko gaming table 1.

FIG. 3 is an exploded perspective view showing a configuration of a detection unit 10.

FIG. 4 is a circuit diagram showing an electrical configuration of a detection unit 10.

FIG. 5 is an electric circuit diagram showing an entire pachinko ball firing detection device 2.

FIG. 6 is a flowchart of a program corresponding to a movement information determination unit of the pachinko ball launch detection device 2.

FIG. 7 is a block diagram showing a main part of a second embodiment.

FIG. 8 is a timing chart explaining the operation of the circuit of the second embodiment.

FIG. 9 is an explanatory diagram showing a configuration of a detection unit 10 in the third embodiment.

FIG. 10 is a block diagram showing a configuration of a determination unit DD in a third embodiment.

FIG. 11 is a timing chart for explaining the same operation.

FIG. 12 is a plan view showing another aspect of the wiring pattern forming the coil.

FIG. 13 is an explanatory diagram showing a state of conventional detection of an object using eddy current.

[Explanation of Codes] 10 Detection Unit 11 Upper Lid 12 Lower Box 13 Circuit Board 51 Through Hole 52 Wiring Pattern 70 Control Circuit 72 MPU CO Oscillation Circuit L1 Coil SW Switching Circuit Tr1 Twin Transistor

Claims (1)

[Claims] 1. A coil formed of a wiring pattern,
A detection unit including an oscillation circuit that oscillates using the inductance component of the coil and a switching circuit that turns on and off according to the oscillation state of the oscillation circuit, and at least two coils of the detection unit are arranged adjacent to each other. In addition, the coil is arranged in the passage of the detected body made of a magnetic material or a metal body, and information on the movement of the detected body including at least the moving direction of the detected body is detected from the detection states of the plurality of detection units. A detection device provided with a movement information determination unit for determining.