JPH08112402A - Pachinko ball detection sensor - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents malfunction due to ambient light and false detection of foreign matter made of non-magnetic material. A pachinko ball detection sensor 1 of the present invention comprises a magnetic field generating means 8 arranged to face a pachinko ball detection passage 2 and a detection passage 2, and a Hall element for detecting a magnetic field of the magnetic field generating means 8. It is composed of 9. A permanent magnet or an electromagnet (electromagnetic coil) is used for the magnetic field generating means 8.
The magnetic field received by the hall element 9 decreases in size due to diffusion by the pachinko balls 5 and becomes less than or equal to the threshold value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pachinko ball detection sensor used for detecting passage of a pachinko ball, which is provided at a winning opening of a pachinko machine, and particularly relates to prevention of malfunction due to ambient light.

[0002]

2. Description of the Related Art A conventional sensor 1 of this type is provided with a detection passage 2 for pachinko balls 5 as shown in FIG.
The light emitting element 3 is disposed on one side of the light receiving element 4 and the light receiving element 4 is disposed at the position opposite thereto. When the pachinko ball 5 passes through the detection path 2, the light is blocked for a moment by the pachinko ball 5, so that the amount of light received by the light receiving element 4 changes, and the passage of the pachinko ball is detected. In the case 6 of the detection sensor 1, a circuit for shaping the output of the light receiving element 4, a circuit board 7 on which a power supply circuit and the like are mounted are housed together with the light receiving elements 3 and 4.

[0003]

Since the pachinko ball detection sensor is arranged in the vicinity of the winning port of the pachinko machine,
The light receiving element 4 is easily affected by ambient light and may malfunction. Further, since the optical path is blocked, there is a problem in that, in addition to a pachinko ball, a foreign substance made of a non-magnetic material such as a colored glass ball is also erroneously detected.

[0004]

[Means for Solving the Problems]

(1) The pachinko ball detection sensor according to the invention of claim 1 is composed of a pachinko ball detection passage, magnetic field generating means and a Hall element for detecting the magnetic field, which are arranged to face each other across the detection passage. (2) In the invention of claim 2, in the above item (1), the magnetic field generating means is a permanent magnet or an electromagnet (electromagnetic coil).

When the pachinko ball does not pass through the detection passage, the Hall element detects the magnetic field of the magnetic field generating means.
When the pachinko ball passes, the magnetic field is diffused by the pachinko ball, becomes below the detection threshold value of the hall element, and the passage of the pachinko ball is detected. In this case, since the detection is based on the strength of the magnetic field, it is not affected by ambient light, and erroneous detection of a foreign substance made of a nonmagnetic material can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A shows a perspective view of a pachinko ball detection sensor 1 of the present invention, in which parts corresponding to those in FIG. In this invention, the conventional light emitting element 3 and light receiving element 4 are used.
The magnetic field generating means 8 and the Hall element 9 are used in place of the above. A permanent magnet or an electromagnet (electromagnetic coil) is used as the magnetic field generating means 8.

When the pachinko ball 5 does not pass through the detection passage 2 in the state of FIG. 2A, the Hall element 9 detects the magnetic field of the magnetic field generating means 8, so as shown in FIG. 1B, the "H" level. (Or “L” level) is output. When the pachinko ball 5 is passing through the detection passage 2, the state shown in FIG.
As shown in, the magnetic field of the magnetic field generation means 8 is diffused by the pachinko ball 5, becomes less than the detection threshold value Hth of the hall element 9, and the “L” level (or “H” level) is output, and the pachinko ball 5 passes. Is detected.

[0008]

According to the present invention, since the magnetic field of the magnetic field generating means 8 is diffused by the pachinko balls 5 passing through the detection passage 2 and the strength of the magnetic field is detected by the hall elements 9 arranged facing each other, the optical system is used. As described above, effects such as no influence of ambient light and no malfunction of detecting a non-magnetic foreign substance are obtained.

[Brief description of drawings]

FIG. 1A is a perspective view of an embodiment of the present invention, and B is a waveform diagram of the magnetic field strength and the detection output received by the Hall element 9 of A.

FIG. 2 is a diagram showing a magnetic field distribution between a magnetic field generating means 8 and a Hall element 9 in FIG.

FIG. 3 is a perspective view of a conventional pachinko ball detection sensor.

Claims (2)

[Claims] 1. A pachinko ball detection sensor comprising a pachinko ball detection passage, magnetic field generating means arranged to face each other across the detection passage, and a hall element for detecting a magnetic field generated by the magnetic field generation means. 2. The pachinko ball detection sensor according to claim 1, wherein the magnetic field generating means is a permanent magnet or an electromagnet (electromagnetic coil).