JPH02255173A - Proximity switch for detecting pinball - Google Patents

Abstract

PURPOSE:To constitute a proximity switch for detecting pinball so that it is hardly influenced by a disturbance caused by a radio wave and to prevent the generation of a malfunction by integrating a detection coil provided so as to be positioned on the side face of a passing pinball into the proximity switch. CONSTITUTION:A proximity switch 1' consists of a detection coil 2' of a miniature and short solenoid type, and an equipment 5 in which an oscillating circuit 7 for supplying an electromagnetic wave, and an amplifying circuit 8 for amplifying and outputting a detecting signal are integrated unitedly. This proximity switch 1' is used by being provided so as to be placed in an adjacent position of the side face of a pinball 6 passing through the detection coil 2', and when the pinball 6 passes through the front of the detection coil 2', oscillation energy is lowered by absorbing an electromagnetic wave emitted from the detection coil 2', therefore, the equipment 5 detects and amplifies it, and thereafter, outputs a fact that the pinball 6 passes through, as a signal. In such a way, since the detection coil is miniaturized, other part than the detecting surface can be covered easily with a shielding material, etc., in accordance with necessity, and by preventing an interference caused by a radio wave from the outside, the function of a pinball machine can surely be held.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a proximity switch that is attached to a pachinko ball slot of a pachinko machine and used to detect pachinko balls passing through the slot. It is.

(Prior Art) Conventionally, the following types of detectors have been used for detecting pachinko balls that are attached to the slots of pachinko machines and pass through the slots.

(1) A method that uses the weight of a pachinko ball to convert it into mechanical motion, and then converts it into an electrical signal. There are two methods: a method that opens and closes a photoelectric switch based on movement, and a method that opens and closes a magnetic switch based on the movement of a moving part.

(2) A method of converting directly into an electrical signal, which falls into this category: ■ A method in which a transmissive photoelectric switch is opened and closed by pachinko balls; ■ A method in which a reflective photoelectric switch is opened and closed by a pachinko ball; 'f [magnetic wave type near 1] by pachinko ball
×There is a method of opening and closing the switch.

Among the typical methods mentioned above, the detectors in (1)-■ ~ have disadvantages such as relatively quick wear of the mechanical part and slow response speed; However, there are disadvantages in that the detection sensitivity decreases due to dirt on the photoelectric material, and malfunctions occur due to disturbances caused by light, so detectors based on method (2)○ are currently used in large quantities.

As shown in FIG. 4, the detector or proximity switch IO according to the method (2)-0 above includes a detection coil 12 having an air core through which pachinko balls 11 can pass, and an electromagnetic wave (400 KH) applied to the detection coil 12. It consists of a device 13 equipped with an oscillator circuit that supplies f (I MHz) and an amplification circuit that amplifies and outputs the detection signal, and its operating principle is that when a pachinko ball 11 approaches a detection coil 12, Alternatively, when it passes through, it absorbs all the electromagnetic waves from the device 13, thereby lowering the transmitted energy, so that it is used as the second detection signal.

(Problem to be solved by the invention) Since the proximity switch IO uses a large open magnetic path type air-core coil for the detection coil 12, the detection (transmission/reception) range is wide, so the following problems occur. is happening.

(1) Due to the long distance to react to nearby metals other than pachinko balls 11 (including objects made of conductive plating on plastic), there are restrictions on the installation of motors, metal parts and structures, etc. becomes large, and there are many design problems.

According to the specifications of current typical pachinko machines, when there is a metal plate (iron plate with a thickness of lyntpr) around the detection coil 12, an average of 5gM on the side surface and 15yrtm on the bottom surface.
m.

(2) When attempting to install multiple devices, the distance at which mutual interference occurs is long, so the restrictions on placement are large and there are many problems in design.

According to the specifications of current typical pachinko machines, when the detection coils 12 are arranged parallel to each other on the same plane, or arranged above and below on parallel planes, they are separated by an average of 150 M from each other.

(3) It is easily susceptible to disturbances caused by radio waves, which can cause malfunctions.

A pachinko machine that is fully equipped with a proximity switch IO that incorporates all the detection coils 12, which has the above-mentioned drawbacks, may become open when a commercially available transceiver tuned to a specific frequency is brought close to the camera in about 10 countries. I understand, it has been reported in weekly newspapers that this is a matter of life and death in the pachinko industry, and the industry strongly desires this improvement.

(Means for Solving the Problems) The present invention has been made by focusing on the above-mentioned problems of the conventional technology, and uses a detection coil arranged to be located on the side of passing pachinko balls in close proximity to each other. The overall purpose is to solve the above problems by incorporating it into a switch.

Misfire 1! The IJ has a detection filter disposed on the side of passing pachinko balls, an oscillation circuit that supplies the required electromagnetic waves to the detection coil, and an amplification circuit that amplifies and outputs the detection signal, respectively. Alternatively, it is a proximity switch for detecting pachinko balls, which consists of an integrated device.

(Function) Instead of the conventional large loop-shaped detection coil that allows pachinko balls to pass through, the proximity switch incorporates a detection coil that is placed on the side of the pachinko balls passing through.・The detection coil is small. As a result, the spread of magnetic flux can be minimized, significantly shortening the distance at which it reacts with metal plates, etc., and the distance at which mutual interference occurs when multiple devices are installed in parallel, as well as being less susceptible to disturbances caused by radio waves. I was able to make it difficult.

In addition, since the detection coil of the proximity switch can be made smaller, it becomes easier to cover the area other than the detection surface with a shielding material, etc., so that its characteristics can be further improved.

(Example) The present invention will be described in detail below based on an example shown in FIGS. 1 to 3. In FIG. 1 showing a block diagram of the proximity switch 1 for detecting pachinko balls, a detection coil 2, an oscillator 3 connected to the detection coil 2 and containing a complete oscillation circuit for supplying electromagnetic waves, and connected to the oscillator 3, The amplifier 4 includes an amplifier 1j circuit for amplifying and outputting the detection signal.

In FIG. 2 showing a proximity switch 1 according to an embodiment of the proximity switch 1 shown in FIG.
and a device 5 that integrally incorporates an amplifying circuit 8 for amplifying and outputting a detection signal.

The proximity switch is used by being placed close to the side of the pachinko ball 6 passing through the detection coil 2, and when the pachinko ball 6 passes in front of the detection coil 2, It absorbs electromagnetic waves and lowers the oscillation energy, so after the device 5 detects and amplifies it,
The fact that the pachinko ball 6 has passed is outputted as a total signal.

This proximity switch 1 has a small and short solenoid-type detection coil 2 placed close to the side of the pachinko ball 6, so that the magnetic flux of electromagnetic waves does not diverge too much in unnecessary directions other than the detection direction. The structure is such that the balls are concentrated in a short space on the side of the pachinko balls 6. As a result, the separation distance between the detection coil 2 and a metal plate made of iron, aluminum, etc. is 3 m.
m, and considering that the separation distance between detection coils i to avoid mutual interference is 40 to 50 m, and the intensity of electromagnetic waves decreases rapidly in a curved line rather than linearly with respect to the distance from the source. , the characteristics are significantly improved compared to conventional ones.

In this case, the proximity switch 1 incorporates a detection coil 2 arranged so as to be located on the side of the passing pachinko ball 6 instead of the conventional loop-shaped detection coil 12, so the detection coil 2 can be miniaturized. Since we have been able to minimize the spread of magnetic flux, we have significantly shortened the distance at which it reacts with metal plates, etc., and the distance at which mutual interference occurs when multiple pieces are installed side by side, and the outer hole is not affected by radio waves. I could have been jealous.

Since it has become possible to cover the surface other than the detection surface with a shielding material, magnetic material, etc., its characteristics can be further improved.

In the above embodiment, a solenoid type detection coil 2 is used as the detection coil 2 of the proximity switch 1, but the present invention is not limited to this type as long as it achieves the same purpose.

Also, one detection coil 2 is arranged parallel to the traveling direction of the pachinko balls 6, but the installation position and method are not limited as long as it can be placed near the side of the pachinko balls 6. Also, the number of attachments is not just one, but a plurality of them may be installed.

(Effects of the Invention) Since the present invention has the above configuration, it has the following effects.

(1) Since the detection coil was placed on the side of the passing pachinko balls, the overall size of the detection coil was minimized and the spread of magnetic flux was minimized, so the separation distance from the metal plate and the distance between the detection coils It becomes possible to significantly reduce the separation distance for avoiding mutual interference between the players, and the performance of the pachinko machine can be further improved.

(2) Since the detection coil has been miniaturized, parts other than the detection surface can be easily covered with shielding material, etc. if necessary, preventing interference from external radio waves and ensuring full functionality of the pachinko machine. be able to.

(3) Items (1) and (2) above make it possible to provide pachinko machines with excellent functionality, which contributes to increased sales and corporate profits.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention.
The figure is a block diagram, Figure 2 is a schematic diagram for explaining the arrangement method, Figure 3 is a circuit diagram for oscillating electromagnetic waves and amplifying and outputting the detection signal, and Figure 4 is a schematic perspective view showing a conventional example. be. 3... Oscillator 5... Equipment 7... Oscillation circuit 4... Amplifier 6... Pachinko ball 8... Amplifier circuit

Claims (1)

[Scope of Claims] 1) A detection coil disposed on the side of passing pachinko balls, a transmitting circuit that supplies the required electromagnetic waves to the detection coil, and an amplification circuit that amplifies and outputs the detection signal. A proximity switch for detecting pachinko balls consisting of one of the two devices, either separately or integrated. 2) The proximity switch for detecting pachinko balls according to claim 1, characterized in that it is equipped with a small and short solenoid type detection coil. 3) The proximity switch for detecting pachinko balls according to claim 1 or 2, wherein the detection coil other than the detection surface is covered with a shielding material or the like as necessary. 4) The proximity switch for detecting pachinko balls according to any one of claims 1 to 3, characterized in that it includes a detector that integrates an oscillation circuit and an amplification circuit. 5) The proximity switch for pachinko ball detection according to any one of claims 1 to 3, characterized in that it comprises an oscillator having an oscillation circuit and an amplifier having an amplification circuit.