Metallic ball detection sensor and its manufacturing method

Abstract

To provide a highly reliable detection structure making it easy to take electric discharge measures in addition to the thinning of a sensor structure, not by building an antistatic shield member into the interior, but by providing a conductive member doubling as a case on the outer circumference, as antistatic measures for protecting an internal coil winding from external static electricity, as to a metallic ball detection sensor for detecting a metallic ball by causing it to pass therethrough. This metallic ball detection sensor includes a coil spool made by winding a coil winding on the outer circumference of a through hole for causing a conductive ball to pass therethrough, a wiring board mounted with a sensor circuit made by connecting both ends of the coil winding wound on the coil spool, and the base for mounting thereon the coil spool and the wiring board in a manner in which they are separated from each other on one side and on the other side. This detection sensor is made by covering the conductive member, as an external shell member, at least, on either the ball infall side or the ball run out side on the periphery of the through hole.

Description

technical field [0001] The present invention relates to a metal ball detection sensor built in, for example, a pinball machine installed in a game hall, and more specifically, to a metal ball detection sensor and a metal ball detection sensor capable of reducing the thickness of the sensor structure for detecting whether a metal ball passes. manufacturing method. Background technique [0002] Hereinafter, a case where the metal ball detection sensor is used in a pinball machine will be described. [0003] Generally, in a pinball machine, when a game metal ball (hereinafter referred to as a ball) is obtained from a prize slot provided on the game board, or when the ball passes through the dispensing path, the passage of the ball is detected by a through-type metal ball detection device. . [0004] Such a metal ball detection sensor is assembled into various units such as the winning slot unit for managing the passage of balls, and detects and confirms the passage of balls i...

AI Technical Summary

Problems solved by technology

This through-type proximity sensor detects disturbances in the magnetic field by coil windings wound on the outer peripheral surface of the through-hole, but in this case also, the case covering the wiring board must be placed up and down, and the coil needs to be covered up and down as a countermeasure against static electricity. There is a pair of upper and lower shield rings on the outer circumference of the winding, so it is difficult to shorten the dimension in the vertical direction, and there is a limit to reducing the thickness of the through-type proximity sensor

[0011] In addition, in the above-mentioned two patent documents, by using the linear winding to guide the static electricity absorbed from the charged ball or the like to other positions separated from it to discharge, the coil winding is protected from static electricity damage, but due to the static electricity of the discharge It will cause adverse effects on peripheral circuits or various components, so it is desired to be improved

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