JPH0641574Y2 - Pachinko ball passage detector - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to improvement of a detection circuit in a pachinko ball passage detector.

[Prior art]

In recent pachinko machines, when a pachinko ball wins, it can be opened for a certain period of time (for example, 30 seconds) or until a predetermined number (for example, 10) of prizes are awarded to the special winning opening, and it can be updated. The electronic control is performed, and various detection devices that detect a winning ball are used to determine the opening continuation condition. Conventionally, as such a pachinko ball passage detector, a micro switch utilizing mechanical contact at a passage hole has been used. As a non-contact type detector to eliminate the drawbacks of the micro switch, coils are arranged along the periphery of the passage hole.
There are known a configuration that amplifies a change in the inductance when a winning ball passes through the hollow of the coil to detect a ground, and a configuration that uses a pair of opposed optical sensors. However, in the former case, amplification is indispensable for detecting a slight change in inductance, and a large current is required to operate the amplifier. Therefore, if the resistance is increased, the voltage becomes smaller, which makes it difficult to cope with fluctuations. is there. Furthermore, in the case of this pachinko ball passage detector, in the usual case, three are set side by side without any gaps, so in the case of the same structure, the phenomenon of electromagnetic induction of each electromagnetic coil affects the adjacent electromagnetic coils, so The pachinko ball passage detector has a drawback that the same structure cannot be used. Next, in the latter case, since the optical sensor is used, the above-mentioned drawbacks can be solved, but the problem of durability and malfunction due to dust or the like cannot be avoided.

[Problems to be solved by the device]

This invention was created as a result of earnest research in view of the above circumstances, and its main problem is that there is no risk of malfunction even if pachinko ball passage detectors are set adjacent to each other without a gap, and an amplifier Another object of the present invention is to provide a pachinko ball passage detector capable of highly reliable detection of a winning ball with a simple configuration that does not require parts such as.

[Means for solving problems]

In order to solve the above problems, the present invention provides (a). A pachinko ball passage detector including an oscillation circuit 3 in a frame body 2 having a passage hole 21 through which a pachinko ball passes, and an input side terminal 23 and an output side terminal 24 connected to the oscillation circuit 3. In (b). The oscillating circuit 3 is provided with an oscillating coil composed of a primary coil 31 and a secondary coil 32 which are respectively connected in parallel to the input side terminal 23 and the output side terminal 24 and face each other around the passage hole 21, (c). A transistor that connects the base side to the secondary coil 32 via the first capacitor 33, connects the collector side to the primary coil 31, and detects the oscillation stop of the primary coil 31 when the pachinko ball passes through the passage hole 21. 36 is provided, (d). A first resistor for bias 34 connected in parallel with the secondary coil 32 and the first capacitor 33 is provided, (e). Emitter side and output side terminal of the transistor 36
And a second resistor 37 for limiting current, which is connected between 24 and 24, (f). Providing a second capacitor connected between the base side and the emitter side of the transistor 36 between the first capacitor 33 and the second resistor 37, (g). The emitter side of the transistor 36 and the second resistor 37
A third capacitor 38 for smoothing the voltage and reducing noise, which is connected between the input terminal 23 and the input terminal 23, and (h). The current passing through the primary coil 31 is transferred to the transistor 36
The technical means is taken to allow the passage of the pachinko ball to be detected by flowing it through the output side terminal 24 via.

[Action]

When the winning pachinko ball falls through the passage hole, the pachinko ball passes between the primary coil 31 and the secondary coil 32 arranged in the passage hole. As a result, the transistor 36 whose base side is connected to the secondary coil 32 causes a current to flow from the primary coil 31 side connected to the input side terminal 23 to the output terminal side via the transistor 36. Therefore, the current supplied from the input side terminal 29 is the primary coil.
It does not need to be amplified because it only passes through 31 and transistor 36 and flows to the output side terminal.

【Example】

A preferred embodiment of a pachinko ball passage detector according to the present invention will be described below with reference to the drawings. The pachinko ball passage detector 1 has a configuration in which an oscillation circuit 3 is built in a frame body 2. That is, as shown in FIGS. 1 to 3, the frame body 2 is made of a hollow and substantially rectangular parallelepiped, and a passage hole 21 that vertically penetrates is provided on one side (left side in FIG. 2). It has a known configuration. Here, the passage hole 21 is a hole through which the winning ball passes, and is set to have a diameter slightly larger than the diameter of the pachinko ball. Further, a connecting plate portion 22 having three mounting holes is projected on one side, and an input terminal 23 and an output terminal 24 are provided respectively. Further, the frame body 2 has a laterally divided structure which is divided into upper and lower parts, and the oscillation circuit 3 of the present invention can be housed in the hollow thereof. As shown in FIG. 4, the oscillation circuit 3 has an input side terminal 23 to which an oscillation coil composed of a secondary coil 32 and a primary coil 31 is connected. This secondary coil 32 is a transistor via a capacitor 33.
It is connected to the base side of 34. A bias resistor 34 is connected in parallel with the secondary coil 32 and the capacitor 33. Next, the primary coil 31 is connected to the collector side of the transistor 36. The emitter side of the transistor 36 is connected to the output terminal 24 via the current limiting resistor 37. Further, a transistor 36 is provided between the capacitor 33 and the resistor 37.
A capacitor 35 is connected between the base side and the emitter side of the. Further, a capacitor 38 is provided between the emitter side of the transistor 36 and the resistor 37 and between the input terminal 23 to smooth the voltage and reduce noise. With the above circuit configuration, the transistor 36 operates as a switch. Now, when the pachinko ball does not pass between the oscillation coils (between the primary coil 31 and the secondary coil 32), oscillation is continuously performed between the primary coil 31 and the secondary coil 32, and the base of the transistor 36. Since almost no current flows to the side, the current from the primary coil 31 does not flow to the output terminal 24 side. Next, when the pachinko ball passes between the oscillation coils (between the primary coil 31 and the secondary coil 32), the oscillation of the primary coil 31 does not return to the secondary coil 32, and the oscillation is temporarily stopped. Therefore, since the current flows to the base side of the transistor 36, the current flowing to the primary coil side flows as the collector current through the transistor 36 and flows through the resistor 37 to the output terminal 24. As a result, the current input from the power supply side terminal flows with almost no loss when passing through the pachinko ball, so that the current is limited by the resistor 37 and output from the output terminal 24. The output current is taken out as a change in the voltage across the external resistor 40, and is output to a counter (CMOS, etc.) or other
The IC device 41 can be directly driven. This means that when the amount of change in the above voltage is 12V,
Since the current value can be as large as 1 mA to 13 mA, it can be directly used as a signal for driving IC devices and the like without the need for an amplifier or the like.

[Effect of device]

Since the present invention has the above-mentioned configuration, it consumes much less power when it is not detected than the structure that detects a change in inductance and does not require amplification, so that the power supply capacity is small and the amount of heat generation is small. Further, unlike the conventional configuration for detecting a change in inductance, it is not necessary to have a highly sensitive configuration, it can be used side by side without a gap, and there is no restriction on the configuration of the pachinko ball passage detector. Further, unlike the optical type, it does not malfunction due to dust and the like, and there is no contact, no adjustment, and there is no restriction on the mounting direction, so maintenance-free and highly convenient. Moreover, since the structure is simple, it is suitable for industrial mass production, and a significant cost reduction can be achieved, which is beneficial.

[Brief description of drawings]

FIG. 1 is a side view of a frame body in an embodiment of a pachinko ball passage detector of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a circuit diagram showing an oscillation circuit. . 2 …… Frame 3 …… Oscillation circuit 21 …… Passage hole 23 …… Input side terminal 24 …… Output side terminal 31 …… Primary coil 32 …… Secondary coil 36 …… Transistor

Claims (1)

[Scope of utility model registration request] 1. An oscillation circuit 3 is built in a frame 2 having a passage hole 21 through which a pachinko ball passes, and an input side terminal 23 and an output side terminal 24 connected to the oscillation circuit 3 are provided. In the pachinko ball passage detector, the oscillation circuit 3 is connected in parallel to the input side terminal 23 and the output side terminal 24, respectively, and an oscillation coil composed of a primary coil 31 and a secondary coil 32 facing each other around the passage hole 21 is provided. , The base side is connected to the secondary coil 32 via the first capacitor 33, the collector side is connected to the primary coil 31, and the stop of the oscillation of the primary coil 31 is detected when the pachinko ball passes through the passage hole 21. A transistor 36, a biasing first resistor 34 connected in parallel with the secondary coil 32 and the first capacitor 33, and a current limiting device connected between the emitter side of the transistor 36 and the output side terminal 24. The second resistor 37 of the A second capacitor connected between the base side and the emitter side of the transistor 36 between the sensor 33 and the second resistor 37, between the emitter side of the transistor 36 and the second resistor 37, and the input terminal 23. It is composed of a third capacitor 38 connected between and for smoothing the voltage and reducing the noise, and the current passing through the primary coil 31 is passed through the transistor 36 to the output side terminal 24 to pass the pachinko ball. A pachinko ball passage detector characterized by being capable of detecting.