JPH04295388A - Position detecting device for motor shaft of pachinko (japanese pinball) playing machine - Google Patents

Abstract

PURPOSE:To provide a method detecting the position of a motor shaft which drives the rotating drum of a variable display unit disposed on a pachinko playing machine and capable of changing display into plural states. CONSTITUTION:A motor comprising a reflecting portion 7 and a nonreflecting portion 8 both provided on one side face of a rotor 6, a reflection type photosensor 10 provided on a rotor circuit substrate 11 and emitting and receiving light at its opposite position to the reflecting portion 7 as the rotor 6 rotates, thus driving the rotating drum of the variable display unit of a pachinko playing machine wherein the position of the rotary shaft of the motor is detected by a detection circuit 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating shaft position detecting device for a rotating drum drive motor employed in a variable display device for a pachinko game machine.

0002

2. Description of the Related Art A variable display device for a pachinko game machine that has been used in the past is arranged on a game board and is configured to be able to variably display a plurality of display states. Attached now Figures 7 to 9
The structure and operation will be explained based on the following. First, the variable display device 55 is divided into a mounting board 56 attached to the front surface of the pachinko game board 40 and a drive box (not shown) that houses the drive mechanism part attached to the back surface of the game board 40. The configuration of the mounting board 56 will be explained below mainly with reference to FIG. 8. At the top of the mounting board 56 there is a normal prize opening 5.
8 is formed, and an upper decorative plate 57 is provided in front of this winning hole 58.
is attached, and a variable winning ball device 6 is attached to the front of it.
An opening number display 59 indicating the number of openings of the opening/closing plate 67 of No. 4 is provided, and on the left and right of this opening number display 59,
Starting prize opening 42a provided below the game board number display 59
, 42b are provided with starting winning memory display devices 60a to 60d for notifying that the number of winning balls has been stored up to a maximum of four. In addition, a square opening (not shown) is provided in the lower part of the mounting board 56, and this opening transparent lens cover (
(not shown) are attached in an arc shape. This lens cover enlarges the drawing board P drawn on the surface of the rotating drums 87a to 87c to a size that allows it to be recognized. Furthermore, line indicators 61a to 61f are provided on the mounting board 56 on both sides of the opening (not shown) to notify combinations that should establish a specific display state. That is, the line indicators 61a to 61f are arranged at positions corresponding to the left and right sides of the three symbols (identification information), respectively, and the lines provided on the left and right sides of the center are on the line connecting the line indicators 61a and 61d provided on the left and right sides of the upper part. Line indicators 61c and 61 are provided on the line connecting the indicators 61a and 61b, on the left and right sides of the center, and on the line connecting the indicators 61b and 61e, and on the left and right sides of the bottom.
f, on the line connecting the line indicators 61a and 61f provided on the upper left side and the upper right side, and on the line indicators 61c and 61d provided on the lower left side and the upper right side.
When the predetermined symbols (identification information) are aligned on five lines connecting the , a specific display state, that is, a jackpot occurs. Specifically, as shown in FIG. 7, a jackpot is achieved when, for example, three symbols, 7, a crown symbol, and a mushroom shape, line up on 5 lines. Also, 16 symbols are displayed on one rotating drum, and the above three symbols are drawn one by one, so the probability of appearance of a specific display state (jackpot) on the display is (3 x 5/ 163=1/273).

In FIG. 7, a drive unit storage box 63 is formed into a box shape with an open front, and rotary drums 87a to 87c are accommodated therein. Rotating drum 87a~
87c are the rotating drum mechanisms 86a to 86, respectively.
It is unitized as c and can be easily stored in the drive unit storage box 6.
It is designed to be stored in 3. That is, the rotating drum mechanisms 86a to 86c include rotating drums 87a to 87c on which a plurality of identification information (patterns) P are drawn on the outer peripheral surface, stepping motors 88a to 88c that rotate these rotating drums 87a to 87c, and these stepping motors. It consists of motor fixing plates 89a to 89c for fixing.

In FIG. 8, a variable winning ball device 64 is provided on the pachinko game board 40 below the variable display device 55. Rectangular winning opening 6 above the mounting board 65
6 is opened, and this winning opening 66 is closed by an opening/closing plate 67 which is pivotally supported on the lower end side and can be opened and closed in a direction perpendicular to the mounting board 65. This opening/closing plate 67
is controlled to open and close by a solenoid (not shown), and while it is open, it receives a ball falling from the gaming area and guides it to the winning opening 66 to become a winning ball. Therefore, when the player is handling pachinko balls with the handle, the starting prize openings 42a, 42b
, a rotating drum 87a provided in the variable display device 55 according to the pachinko balls entering the inside from the winning opening 66.
~87c are rotated and stopped in a predetermined manner by stepping motors 88a~88c operated via a separately provided electronic circuit (not shown), and a jackpot is won according to a combination of symbols drawn on the outer periphery of the rotating drums 87a~87c. A determination is made whether or not. The present invention relates to a stepping motor for rotating and stopping a rotating drum of this type of pachinko game machine.

[0005] Below, the rotation of this type of stepping motor,
A known example of a motor position detection device based on stopping will be described. , FIGS. 10A and 10B, the motor shaft 4 to which the rotor 6 is attached is rotatably supported by a bearing 9. As shown in FIGS. A stator magnetic pole plate 2 with a built-in coil 3 is provided on the outer periphery of the rotor 6, and the motor shaft 4 is installed so as to cover the outer periphery of the motor consisting of the motor shaft 4, rotor 6, stator magnetic pole plate 2, etc.
A position detection drum 30 is rotatably mounted on the drum. A reflecting section 32 having a partial cutout (not shown) is formed at an end of the position detection drum 30. A photosensor 31 provided with a light emitting section 33 and a light receiving section 34 is fixed to the mounting plate 1 so as to face the outside of the reflecting section 32 . When the position detection drum 30 rotates with the rotation of the motor shaft 4, the reflection part 3
Light from the light emitting section 33 of the photosensor 31 is reflected on the notch 2, and is received by the light receiving section 34, which turns on the light receiving section 33 and detects the position of the motor.

As yet another known embodiment, a motor for driving the rotary drum of the variable display device of the pachinko game machine described above will be described. In FIG. 9, passage holes 108a to 108c are formed in the rear surface of the drive storage box 63, and the drive control board 10 is inserted into the passage holes 108a to 108c.
Drum position detectors 102a to 102c provided in 00
is coming. Therefore, the passage holes 108a to 10
8c indicates that when the rotating drum mechanisms 86a to 86c are fixed to the drive storage box 63, the rotating drums 87a to
Notches 95a to 95c formed on one side outer peripheral edge of 87c are bored so as to correspond to the rotational position. Therefore, the drum position detectors 102a to 102c are connected to the notch 9.
It is set to be turned on when the notches 5a to 95c are detected, and set to be turned off when it is at a position other than the notches 95a to 95c. Reference numerals 91a to 91c are rotation shafts of motors 88a to 88c, and drums 87a to 87c.
are fixed to the collar members 94a to 94c of the motors 88a to 94c.
88c rotates together with the drums 87a to 87c.

[0007]

However, in the conventional example described above, the photo sensor and position detection device for detecting the position of the motor are provided outside the rotor, which not only requires a large space. Further, since the position detection device such as a photo sensor is disposed outside the motor, there are problems such as being easily affected by external light. Therefore, in order to solve the above-mentioned problems, the present invention provides a position detecting device for a motor rotating shaft in which a position detecting device such as a photo sensor is disposed inside the rotor.

[0008]

[Means for Solving the Problems] Hereinafter, the means for solving the problems will be explained using the reference numerals used in the drawings for explaining the embodiments. A position detection reflecting section 7 having a reflecting surface formed on one inner surface of the rotor 6, a reflecting section 8 having a non-reflecting surface formed on the other inner surface of the rotor 6,
It has a reflective photosensor 10 that can sequentially face the reflective part 7 during rotation, and has a slit 15 through which light from the light emitting part 18 and light receiving part 17 of the reflective photosensor 10 can pass. forming a mask on the photosensor 10,
This is a position detecting device for a motor rotation shaft in which the surface of a non-reflective portion 8 facing the photosensor 10, which is provided to form a predetermined inclination angle with respect to the photosensor 10, is finished with a satin finish.

[0009]

[Operation] When the rotor 6 rotates, the position detection reflective part 7 formed on one inner surface of the rotor 6 and the reflective part 8 having a non-reflective surface formed on the other inner surface of the rotor are displaced to form a reflective type. When the photosensor 10 faces the reflecting section 7, the photosensor 1
The position of the motor rotation shaft is detected by a position detection circuit 16 that converts light from zero into an electrical signal.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the attached drawings 1 to 5, the motor shaft 4 is mounted on the bearing 9 fixed to the mounting plate 1 by caulking etc.
The rotor 6 is rotatably supported by the motor shaft 4. The inner surface of the rotor 6 is formed with a reflective part 7 having a reflective surface and a non-reflective part 8 for detecting the rotational position of the rotor, and the outer peripheral surface of the rotor 6 is magnetized 6a. . In this embodiment, a stepping motor (hereinafter simply referred to as a motor) is used, and a coil 3 is housed inside a stator magnetic pole plate 2 provided between a cover member 5 of a rotor 6 and a mounting plate 1. The plate 2 is arranged so as to face the outer peripheral magnetized portion 6a of the rotor. Circuit board 11 is placed on the rotor 6 side of the mounting plate 1.
is provided, and a reflective photosensor 10 is disposed on this circuit board 11. This photosensor 10 includes a light emitting section 17 and a light receiving section 1.
It has 8. When the rotor 6 rotates, the reflecting section 7 has its mirror surface polished to a glossy finish so that the light from the light emitting section 17 of the reflective photosensor 10 is efficiently reflected and received by the light receiving section 18. They are placed so that they face each other in parallel and equidistant from each other. On the other hand, non-reflective part 8
In contrast to the reflecting section 7, during the rotation of the rotor 6, the photo sensor 1
0 at a predetermined angle of inclination.
It is placed on the inside, and the surface has a satin finish (
(See Figures 2(A), (B), and (C)). Further, the reflective photosensor 10 and the reflective surface of the reflective portion 7 of the rotor are configured so that their focal lengths match, while the surface of the non-reflective portion 8 and the reflective photosensor 10 do not have the same focal length. The settings are as follows. Therefore, the light from the photosensor 10 is received by the reflective part 7, but not by the non-reflective part 8.

A detection circuit 16 for detecting the rotor rotation axis position is mounted on the same substrate 11 on which a reflective photosensor 10 is arranged.
The photo sensor 10, the reflective section 7, and the non-reflective section 8 are housed inside the rotor 6. Reference numeral 12 is a lead wire for position detection. FIG. 3 illustrates the detection circuit 16 of an embodiment of the invention. A DC power supply 19 is connected to the detection circuit, and an A-phase input 20 and a B-phase input 21 are input. The coil 3 is energized via the switching transistor 25, the rotor magnetic pole plate 2 is energized, and the rotor 6 starts rotating in response to the input signal due to its relative action with the outer peripheral magnetized surface 6a of the rotor 6. When the rotor 6 rotates and the reflective surface of the reflective section 7 formed integrally with the rotor 6 comes to the upper surface of the reflective photosensor 10, an output current begins to flow due to the light emitting and light receiving functions of the photosensor 10. When this current reaches a level e determined by the inputs of the Zener diode 22 and the position detection transistor 23, the output f of the position detection transistor 23 rises. The operating waveforms of the detection circuit for these axis angles are as shown in FIG. As shown in the figure, the output width of the position transistor output f is wide, but in order to obtain a more accurate output than this, it is necessary to AND the drive waveform g of the motor A phase input 20 and the drive waveform h of the motor B phase input 21. 24 (AND), narrow position output waveform i
It is something that creates Although this position output waveform signal is input to a separately installed microcomputer and processed, the accurate position of the motor rotation shaft can be detected. Furthermore, the accuracy of the mounting position of the reflective photosensor 10 can be significantly relaxed. In this way, the reference position of the stepping motor can be detected with high precision when the rotor is rotating.

Next, another embodiment according to the present invention is shown in FIG. 5(B).
, illustrated in FIG. Light emitting section 17 of reflective photosensor 10
, the photosensor 10 is covered with a mask 14 having a slit 15 above the light receiving section 18 . The light emitted from the light emitting part 17 of the photosensor 10 passes through the slit 15 and is reflected by the reflecting surface of the reflecting part 7, and then passes through the slit 15 again and can be received by the light receiving part 18. Since the width of the output current of the reflective photosensor 10 can be set narrowly, this is useful for improving the accuracy of the photosensor 10. The symbol α in FIG. 6 is the width of the output current passing through the slit 15 of the mask 14 relative to the axis angle, and β is the width of FIG. 5 without the mask.
(A) shows the width of the output current with respect to the axis angle in the case shown in the figure.

[0013]

[Effects] In the present invention, the means having the function of detecting the axis position of the motor that drives the rotary drum of the variable display device of the pachinko game machine is housed inside the rotor, thereby eliminating the need to provide complicated external components. , the motor itself is compact, and the reflective part and non-reflective part for the light from the photosensor are integrally formed on the rotor and the inner surface, which simplifies the configuration and reduces manufacturing costs, as well as drive signal and position detection. By outputting the signals in combination, it is of course possible to contribute to improving the accuracy of the motor shaft position detection function, and providing a mask to the photosensor has the effect of improving the accuracy of the photosensor.

[Brief explanation of drawings]

FIG. 1(A) is a rear view of a motor shaft position detector according to the present invention.

FIG. 1(B) is a sectional view taken along the line CC in FIG. 1(C).

FIG. 1(C) is a front view of FIG. 1(A).

FIG. 2(A) is a front view of a reflective photosensor.

FIG. 2(B) is an enlarged schematic diagram of a rotor reflective surface and a photo sensor.

FIG. 2(C) is an enlarged schematic diagram of the non-reflective surface of the rotor and the photosensor.

FIG. 3 is a circuit diagram for output detection.

[Figure 4] Output current with respect to shaft angle of photo sensor, position output detection transistor output waveform, motor drive waveform, AND
Logic circuit output waveform diagram.

FIG. 5(A) is a schematic cross-sectional view of a photosensor without a mask.

FIG. 5(B) is a schematic cross-sectional view of a masked photosensor.

FIG. 6 is a graph showing the width of the output electric signal relative to the axis angle.

FIG. 7 is a perspective view of the rotating drum of the variable display device of the pachinko game machine.

FIG. 8 is an enlarged plan view of the game board of the pachinko game machine.

FIG. 9 is a sectional view of a motor assembled to a rotating drum.

FIG. 10(A) is a side view of a conventional stepping motor.

FIG. 10(B) is a sectional view taken along line BB in FIG. 10(A).

[Explanation of symbols]

1 Mounting plate 2 Magnetic pole plate 3 Coil 4 Motor shaft 6 Rotor 7 Reflection part 8 Non-reflective part 9 Bearing 10 Reflective photo sensor 11 Circuit board 14 Lead wire mask 15 Slit 16 Detection circuit 17 Light emitting part 18 Light receiving part 19 DC power supply 20 A phase input 21 B phase input 22 Zena diode 23 Position output transistor 24 AND logic circuit 25 Switching transistor

Claims (5)

[Claims] 1. In a motor that drives a rotating drum of a variable display device disposed on a pachinko game board and capable of changing to a plurality of display states, a position detection reflecting part having a reflecting surface formed on an inner surface of a rotor. a reflective part formed on the other inner surface of the rotor and having a non-reflective surface; a reflective photosensor that can sequentially face the reflective part while the rotor is rotating; and a drive signal and a position detection signal. A position detection device for a rotating shaft of a motor of a pachinko game machine, which includes a detection circuit capable of outputting a signal and a detection circuit housed in a rotor. 2. The motor rotation shaft of the pachinko game machine according to claim 1, wherein the photo sensor is provided with a mask having a slit through which light from the light emitting section and the light receiving section of the reflective photo sensor can pass. Position detection device. 3. A reflective portion having a non-reflective surface is provided to form a predetermined inclination angle with respect to the reflective photosensor, and a surface of the reflective portion facing the photosensor has a matte finish. A position detection device for the motor rotation axis of a pachinko game machine. 4. The position detecting device for a motor rotation shaft of a pachinko game machine according to claim 1, wherein the position detecting reflective part is formed on one side of the rotor so as to face the reflective photo sensor equidistantly and parallel to the rotor. 5. The position detection device for a motor rotation shaft of a pachinko game machine according to claim 1, further comprising means for detecting a reference position of the motor by outputting a combination of a drive signal and a position detection signal.