JPH06292753A - Metal ball detector - Google Patents

Abstract

PURPOSE:To provide a metal ball detector which has longevity and is hard to receive the effect of an outside factor, by detecting the passage of a metal ball by detecting by means of a hole sensor that magnetic flux density between the metal ball and a magnetization portion increases when the metal ball has passed a detection hole. CONSTITUTION:This metal ball detector is equipped at the prize opening or the like of a pachinko (Japanese pin ball game) machine and detects the passage of a metal ball. In this instance, a detection hole 3 having a hole diameter through which the passage of a metal ball is possible, is penetrated through a case body 1 that is made of synthetic resin and forms a thin plate shape, in a plate thickness direction. A magnetization portion 5, a hole sensor 6, a signal processing circuit 7 and a wiring portion 8 or the like for connecting these together are assembled into the inside of a housing portion 4 provided on one side portion of the detection hole 3 in the case body 1. When a metal ball passes the detection hole 3, magnetic flux density between the metal ball and the magnetization portion 5 increases, so this is detected by means of the hole sensor 6, and the passage of the metal ball is detected. As a result, a detector which has longevity and is hard to receive the effect of an outside factor, is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal ball detector used for detecting passage of a metal ball, which is provided at a winning opening of a pachinko machine.

[0002]

2. Description of the Related Art Conventionally, this type of detector is provided with a detection hole which allows passage of a metal ball, and when the metal ball passes through the detection hole, it is detected and a detection signal is output. . Various methods have been proposed for detecting the passage of the metal ball, and currently, a contact type, an optical type, an electromagnetic induction type, etc. are put into practical use.

Of these, the contact type is one in which the movable piece is displaced by a metal ball and the contact mechanism is turned on and off to detect passage of the metal ball in the detection hole. In the optical type, the metal ball blocks the optical path between the light emitting element and the light receiving element to change the amount of light received by the light receiving element to detect the metal ball. The detection operation of the metal ball is performed by approaching the oscillation coil of the LC high frequency oscillation circuit and changing the oscillation state of the oscillation circuit.

[0004]

However, the contact type has the drawback that the contact part has a short life due to wear and the charring phenomenon is likely to occur. Further, the optical type is susceptible to the influence of ambient light, while the electromagnetic induction type is susceptible to the influence of radio waves.

The present invention has been made in view of the above problems. By detecting the passage of a metal sphere through a detection hole by a magnetic method, a new metal sphere can be detected that has a long life and is not easily influenced by external factors. The purpose is to provide a container. Another object of the present invention is to provide a metal ball detector which has a small number of parts and which can be easily manufactured and assembled by integrating the constituent members.

[0006]

In order to solve the above problems, the metal ball detector of the present invention has the above-mentioned structure. A container in which a metal ball can move, and a magnetized portion and a Hall sensor are provided near the container.

A container in which a metal ball can move, and a magnetizing unit and a Hall sensor so as to sandwich the container are provided. It is provided with a container in which a metal ball can move, a magnetized part and a hall sensor, and the hall sensor is located between the container and the magnetized part.

A detection groove in which the metal ball can move, and a magnetized portion and a Hall sensor are provided in the vicinity of the detection groove. It is provided with a detection groove in which the metal ball can move, and a magnetized portion and a Hall sensor so as to sandwich the detection groove.

A detection groove in which a metal ball can move, a magnetized portion and a Hall sensor are provided, and the Hall sensor is located between the detection groove and the magnetized portion. A detection hole having a hole diameter through which a metal ball can pass, and a magnetized portion and a hall sensor are provided near the detection hole.

A detection hole having a hole diameter through which a metal ball can pass, a magnetized portion positioned so as to sandwich the detection hole, and a hall sensor are provided. A detection hole having a hole diameter that allows passage of a metal sphere, a magnetized portion and a hall sensor are provided, and a magnetized portion and a hall sensor positioned so as to sandwich the detection hole are provided, and the hall sensor includes a detection groove and a magnetized portion. It has a structure located in between.

[0011]

The magnetic field around the magnetic field formed by the magnetized portion changes in strength and direction each time the metal sphere, which is a metal sphere, passes. By detecting the change in the magnetic field with the Hall sensor, it is possible to detect whether or not the metal ball has passed.

Since the metal balls are detected by the magnetic method as described above, the wear and chattering phenomenon of the contact portion unlike the contact type does not pose a problem, and the external factors such as the optical type and the electromagnetic induction type cause no problem. It will not be adversely affected. In addition, a container in which a metal ball can move, a magnetized part and a hall sensor are integrally formed, a detection groove in which a metal ball can move, a magnetized part and a hall sensor are integrally formed, and a detection hole having a hole diameter through which a metal ball can pass. The number of parts is reduced by integrally forming the magnetizing unit and the Hall sensor.

[0013]

1 shows the appearance of a metal ball detector according to one embodiment of the present invention. This metal ball detector is arranged inside a winning opening of a pachinko machine, and has a detection hole 3 having a hole diameter through which a metal ball 2 can pass in a case body 1 made of synthetic resin, which is a thin plate. It is formed so as to penetrate in the thickness direction.

In this case body 1, one side portion of the detection hole 3 serves as an accommodating portion 4 for the constituent members. Inside the accommodating portion 4, as shown in FIGS. The sensor 6, the signal processing circuit 7, and the wiring 8 connecting the Hall sensor 6 and the signal processing circuit 7 are incorporated.

The magnetic field around the magnetized portion is as shown in FIG. 4 when there is no metal ball, but when the metal ball passes through the detection hole, the position A between the metal ball and the magnetized portion is as shown in FIG. Then the magnetic flux density becomes higher. A similar phenomenon also occurs at the position B on the extension line connecting the magnetized portion and the metal ball. It can be seen from FIGS. 2 and 3 that the Hall sensor is fixed at the position A so that the change in the magnetic flux density can be detected by the Hall sensor. FIG. 6 shows a sectional view of a metal ball detector in which a Hall sensor is fixed at position B so as to detect a change in magnetic flux density at position B.

FIG. 7 shows the appearance of a metal ball detector according to another embodiment of the present invention. This metal ball detector is
It is provided in a metal ball insertion part or a discharge part in a pachinko machine, and a groove 9 through which a metal ball 2 can pass is formed in a synthetic resin case body 1 forming a gutter-shaped groove.

In this case body, the accommodating portion 4 of the constituent member is adjacent to one measuring portion of the groove. Inside the accommodating portion 4, as shown in FIGS. 8 and 9, the magnetized portion 5, the Hall sensor 6 are provided. The signal processing circuit 7 is incorporated. As described above, the magnetic field around the magnetized portion 5 becomes as shown in FIG. 10 when there is no metal sphere, but when the metal sphere passes through the detection hole, as shown in FIG. 11, between the metal sphere and the magnetized portion. At position A, the magnetic flux density becomes higher. A similar phenomenon occurs at position B on the extension line connecting the magnetized portion and the metal ball, and also at point C in the vicinity. It can be seen from FIG. 8 and FIG. 9 that the Hall sensor is fixed at the position A so that the change of the magnetic flux density can be detected by the Hall sensor. FIG. 12 shows a sectional view of a metal ball detector in which a Hall sensor is fixed at position C so as to detect a change in magnetic flux density at position C.

The present invention utilizing this phenomenon can be applied not only to the detection hole and the groove but also to the container in which the metal ball is movable. The present invention has been described with a structure having a detection hole and a passage groove, but any container may be used as long as it has a difference in detection sensitivity as long as it can pass the magnetic field lines in a container in which a metal ball can move. Further, not only the metal ball detector but also the proximity switch can be applied.

[0019]

According to the present invention, it is possible to realize a novel metal ball detector which has a long life and is hardly affected by external factors by detecting the passage of the metal ball through the detection hole by a magnetic method. .

Further, according to the present invention, it is possible to provide a metal ball detector in which the constituent members can be integrated, the number of parts is small, and the manufacture and assembly are easy. In addition to the above effects, the position A between the magnetized portion and the object to be detected has a greater amount of change in the magnetic field depending on the presence or absence of the object to be detected than the position B on the extension line between the magnetized portion and the object to be detected. Since the size of the Hall sensor is large, the detection function can be improved by fixing the Hall sensor so as to be positioned between the magnetized portion and the object to be detected, even if the deviation in the performance of the Hall sensor due to the manufacturing capability of the Hall sensor becomes large. There was also a great effect that the Hall sensor, which was not damaged and resulted in high yield and low cost, could be used and the price of the metal ball detector could be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a sectional view showing an embodiment of the present invention.

FIG. 4 is a magnetic field when a metal ball is not present in the vicinity according to one embodiment of the present invention.

FIG. 5 is a magnetic field when a metal ball is in the vicinity according to an embodiment of the present invention.

FIG. 6 is a plan view showing an embodiment of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a side view showing another embodiment of the present invention.

FIG. 9 is a sectional view showing another embodiment of the present invention.

FIG. 10 is a magnetic field when there is no metal ball in the vicinity according to another embodiment of the present invention.

FIG. 11 is a magnetic field when a metal ball is in the vicinity according to another embodiment of the present invention.

FIG. 12 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 1 case body 2 metal sphere 3 detection hole 4 accommodating portion 5 magnetized portion 6 hall sensor 7 signal processing circuit

Claims (9)

[Claims] 1. A container in which a metal ball can move and allows magnetic flux to pass,
A metal ball detector comprising a magnetized portion provided near the container and a Hall sensor fixed near the magnetized portion so that the distance between the magnetized portion is constant. 2. The metal ball detector according to claim 1, wherein the magnetized portion and the Hall sensor are located with the container sandwiched therebetween. 3. The metal ball detector according to claim 1, wherein the container and the magnetized portion are located with the Hall sensor interposed therebetween. 4. A metal ball comprising a detection groove in which the metal ball can move, a magnetized portion provided in the vicinity of the detection groove, and a Hall sensor fixed in the vicinity of the magnetized portion so that the distance to the magnetized portion is constant. Detector. 5. The metal ball detector according to claim 4, wherein the magnetized portion and the hall sensor are located with the detection groove sandwiched therebetween. 6. The metal ball detector according to claim 4, wherein the detection groove and the magnetized portion are located with the hall sensor interposed therebetween. 7. A detection hole having a hole diameter through which a metal ball can pass, a magnetized portion provided near the detection hole, and a hole fixed near the magnetized portion so that the distance between the magnetized portion is constant. A metal ball detector consisting of a sensor. 8. The metal ball detector according to claim 7, wherein the magnetized portion and the hall sensor are located with the detection hole sandwiched therebetween. 9. The metal ball detector according to claim 7, wherein the detection hole and the magnetized portion are located with the hall sensor interposed therebetween.