JPH07106251B2 - Position detection device for motor rotating shaft of pachinko machine - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A variable display device of a pachinko game machine which has been used conventionally is arranged on a game board and can be variably displayed in a plurality of display states. Now attached FIGS. 7 to 9
Based on the above, the configuration and operation will be described. 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 a drive mechanism portion attached to the back surface of the game board 40. The configuration of the mounting substrate 56 will be described below mainly with reference to FIG. A winning hole 58 is usually formed on the top of the mounting board 56, and the upper decorative plate 5 is formed on the front surface of the winning hole 58.
7 is attached to the front surface of the opening / closing plate 67 of the opening / closing plate 67 of the variable winning ball device 64.
Is provided, and to the left and right of the number-of-opening display 59, a start winning opening 4 provided below the number-of-game display 59.
Starting prize winning memory display devices 60a to 60d are provided to inform that the number of winning balls won in 2a and 42b is stored up to four. A square opening (not shown) is formed in the lower portion of the mounting substrate 56, and this opening transparent lens cover (not shown) is mounted in an arc shape. The lens cover enlarges the drawing board P drawn on the surfaces of the rotating drums 87a to 87c to a size such that the drawing board P can be distinguished. Further, the mounting substrate 56 on both sides of the opening (not shown) is provided with line indicators 61a to 61f for notifying the combination that the specific display state should be established. That is, the line indicators 61a to 61f are respectively arranged at the positions corresponding to the left and right of the three symbols (identification information), and the lines provided at the center left and right on the line connecting the line indicators 61a and 61d provided on the upper left and right sides. On the line connecting the display devices 61a and 61b, on the line connecting the line display devices 61b and 61e provided at the center left and right, and the line display device 61c provided at the lower left and right,
61f, a line indicator 61a, 61f provided on the left upper side and the right upper side, and a line indicator 61c, 6 provided on the lower left side and the upper right side.
When the predetermined symbols (identification information) are aligned on the five lines on the line connecting 1d, the specific display state, that is, the big hit.
Specifically, as shown in FIG. 7, a big hit occurs when three symbols, for example, a symbol crown and a symbol mushroom type are aligned on five lines. Further, 16 symbols are displayed on one rotating drum, and the three symbols are drawn one by one, so that the appearance probability of the specific display state (big hit) on the display is (3 × 5 / 16 ³ = 1/273).

In FIG. 7, the drive unit storage box 63 is formed in a box shape with the front open, and the rotary drums 87a to 87c are stored therein. Rotating drum 87a-
87c are rotating drum mechanisms 86a to 86, respectively.
Unitized as c, drive unit storage box 6 can be easily
It is designed to be stored in 3. That is, the rotary drum mechanisms 86a to 86c have rotary drums 87a to 87c having a plurality of identification information (patterns) P drawn on the outer peripheral surface thereof, stepping motors 88a to 88c for rotating these rotary drums 87a to 87c, and these stepping motors. It is composed 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. A rectangular winning opening 6 is provided above the mounting board 65.
6 is opened, and the winning opening 66 is closed by an opening / closing plate 67 which pivotally supports the lower end side and which can be opened / closed in the vertical direction with respect to the mounting substrate 65. This open / close plate 67
Is controlled to open and close by a solenoid (not shown), and receives a ball hitting the game area during opening and guides it to the winning opening 66 to be a winning ball. Then, when the player is handling the pachinko balls with the handle, the starting winning holes 42a, 42
b, a rotary drum 87 provided in the variable display device 55 in accordance with the pachinko balls that have entered through the winning opening 66.
a to 87c perform predetermined rotations and stop by stepping motors 88a to 88c that operate via an electronic circuit (not shown) provided separately, and depending on the combination of symbols drawn on the outer circumference of the rotary drums 87a to 87c. It is judged whether or not it is a big hit. The present invention relates to a stepping motor for rotating and stopping a rotary drum of a pachinko game machine of this type.

Hereinafter, the rotation of this type of stepping motor,
A publicly known example of a motor position detection device by stopping will be described. 10 (A) and (b), the motor shaft 4 having the rotor 6 attached thereto is rotatably supported by the bearing 9.
A stator pole plate 2 having a coil 3 built-in is provided on the outer periphery of the rotor 6, and the motor shaft 4 is covered with the motor shaft 4, the rotor 6, the pole plate 2 of the stator, and the like.
The position detection drum 30 is rotatably attached to the. At the end of the position detecting drum 30, a reflecting portion 32 having a notch (not shown) is formed. The photosensor 31 provided with the light emitting portion 33 and the light receiving portion 34 is fixed to the mounting plate 1 so as to face the outside of the reflecting portion 32. When the position detection drum 30 rotates along with the rotation of the motor shaft 4, the reflecting portion 3
The light from the light emitting portion 33 of the photo sensor 31 is reflected by the notch 2 and is received by the light receiving portion 34, the light receiving portion 33 is turned on, and the position of the motor is detected.

As yet another known embodiment, a motor for driving the rotary drum of the variable display device of the pachinko gaming 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 1 is formed in the passage holes 108a to 108c.
00 drum position detectors 102a to 102c
Is coming. Therefore, the passage holes 108a to 10a
When the rotary drum mechanisms 86a to 86c are fixed to the drive storage box 63, the rotary drums 8a to 8c.
Notches 95a to 95c formed on the outer peripheral edge of one side of 87c are drilled so as to correspond to the rotating positions. Then, the drum position detectors 102a to 102c have the cutouts 9
It is set to be ON when 5a to 95c are detected, and is set to 0FF at positions other than the cutouts 95a to 95c. Reference numerals 91a to 91c are rotation shafts of the motors 88a to 88c, and the drums 87a to 87c.
Are fixed to the color members 94a to 94c of the motor 88a to
88c rotates together with the drums 87a to 87c. See you
A photo sensor for detecting the position of the rotor is installed inside the rotor.
There are known examples provided. For example, Japanese Patent Application No. 2-17123
No. 4 (JP-A-4-58963). However, this
In the publicly known example, the detected part and the low
Yes, it does not have a reflective photo sensor provided on the bearing mounting plate.
However, when the rotor is rotating,
Even if the light is reflected on a surface other than the detected area, it is received by the light receiving area.
It does not have a structure to prevent

[0007]

However, in the above-mentioned conventional example, since the photo sensor and the position detecting device for detecting the position of the motor are provided outside the rotor, not only a large space is required but also a large space is required. Further, since a position detecting device such as a photo sensor is arranged outside the motor, there is a problem that it is easily affected by external light. Photo sensor
In another conventional example in which the position detection device is installed inside the rotor,
In this case, the light from the light emitting part is reflected on the surface outside the detected part.
May be received by the light receiving unit, and
No means are provided for this. Therefore, in order to solve the above-mentioned problems, the present invention provides a position detecting device such as a photo sensor inside the rotor and a photo sensor while the rotor is rotating.
The light from the light emitting part of the mirror reflects on the surface of the non-reflective part
In order to prevent light from being received by the receiver of the
Form a certain angle on the reflective surface with respect to the reflective photo sensor
And non-reflection facing the photo sensor
( EN) Provided is a position detecting device for a motor rotating shaft, the surface of which is satin finished .

[0008]

[Means for Solving the Problems] Means for solving the problems will be described below with reference to the reference numerals used in the drawings for explaining the embodiments. A position detecting reflecting section 7 having a reflecting surface formed on a part of one inner face of the rotor 6, the position detection
A reflecting portion 8 having a non-reflecting surface formed on a part of the other inner surface of the rotor 6 symmetrically with the use reflecting portion, and the reflecting portion 7 and the non-reflecting portion 8 are sequentially faced while the rotor 6 is rotating. And a reflection type photosensor 10 provided on the rotor bearing mounting plate 1 so as to enable the reflection type photosensor 1
The light from the light emitting portion 17 of 0 is reflected by the non-reflecting portion 8 and is received by the light receiving portion.
Non-reflection of the non-reflecting portion 8 to prevent light from being received by 18.
This is a position detecting device for a motor rotating shaft in which a surface is provided so as to form a predetermined inclination angle with respect to the photosensor 10, and a surface of the non-reflective portion 8 facing the photosensor 10 has a satin finish.

[0009]

When the rotor 6 rotates, the position detecting reflection portion 7 formed on one inner side surface of the rotor 6 and the reflection portion 8 having a non-reflective surface formed on the other inner side surface of the rotor are displaced to form a reflection type. When the photo sensor 10 faces the reflecting portion 7, the photo sensor 1
The position detection circuit 16 that converts light from 0 into an electric signal detects the position of the motor rotation shaft.

[0010]

DETAILED 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 or the like.
The rotor 6 is rotatably supported on the motor shaft 4. The inner surface of the rotor 6 is formed with a reflecting portion 7 and a non-reflecting portion 8 each having a reflecting surface for detecting the rotor rotation position, 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 the cover member 5 of the rotor 6 and the mounting plate 1 are used.
The coil 3 is housed inside the stator magnetic pole plate 2 provided between and, and the magnetic pole plate 2 is arranged so as to face the outer peripheral magnetized portion 6a of the rotor. The circuit board 1 is attached to the rotor 6 side of the mounting plate 1.
1 is provided, and the reflection type photo sensor 10 is provided on the circuit board 11.
To arrange. The photo sensor 10 includes a light emitting portion 17 and a light receiving portion 18. When the rotor 6 rotates, the reflector 7 polishes the mirror surface of the reflective photosensor 10 so that the light from the light emitter 17 can be efficiently reflected and received by the light receiver 18, and the reflective photosensor 10 is also provided. Are arranged so as to face each other in parallel at an equal distance. On the other hand, the non-reflecting portion 8 is opposite to the reflecting portion 7 while the rotor 6 is rotating,
In order to prevent the light from the light emitting portion 17 of the photosensor 10 from being reflected and received in the direction of the light receiving portion 18, the photosensor 10 is arranged inside the rotor 6 so as to face the photosensor 10 at a predetermined inclination angle, Further, the surface thereof is subjected to a satin finish (see FIGS. 2A, 2B and 2C). Further, the reflective photosensor 10 and the reflecting surface of the reflecting portion 7 of the rotor are configured so that their focal lengths match, while the surface of the non-reflecting portion 8 and the reflective photosensor 10 do not have the same focal length. Is set as follows. Therefore, the light from the photosensor 10 is received by the reflecting portion 7 and is not received by the non-reflecting portion 8.

A detection circuit 16 for detecting the rotor rotation axis position is provided on the same substrate 11 on which the reflection type photosensor 10 is arranged.
It is formed above, and is housed inside the rotor 6 together with the photosensor 10, the reflecting portion 7, and the non-reflecting portion 8. Reference numeral 12 is a position detecting lead wire. FIG. 3 illustrates the detection circuit 16 of an embodiment of the present invention. The DC power supply 19 is connected to the detection circuit, and the A phase input 20 and the B phase input 21 are input. The coil 3 via the switching transistor 25
Is energized, the rotor magnetic pole plate 2 is excited, and the rotor 6 starts rotating in response to the input signal by the relative action with the outer peripheral magnetized surface 6a of the rotor 6. When the rotor 6 rotates, the reflecting surface of the reflecting portion 7 formed integrally with the rotor 6 has a reflection type photosensor 10
When it comes to the position of the upper surface, the output current starts to flow due to the light emitting and light receiving actions of the photo sensor 10. When this current reaches the 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 operation waveforms of the detection circuit with respect to these axis angles are as shown in FIG. Although the output width of the position transistor output f is wide as shown in the figure, in order to obtain an output with higher accuracy than this, the logical product of the drive waveform g of the motor A phase input 20 and the drive waveform h of the motor B phase input 21 is used. 24 (AND) is taken to create a narrow position output waveform i. Although not shown, this position output waveform signal is input to a separately installed microcomputer,
By taking measures, the accurate position of the motor rotating shaft can be detected. In addition, the reflection type photo sensor 10
The mounting position accuracy of can be greatly eased. In this way, the reference position of the stepping motor during rotation of the rotor is detected with high accuracy.

Next, another embodiment according to the present invention will be described with reference to FIG.
(B) is shown in FIG. The photosensor 10 is covered by a mask 14 having slits 15 provided above the light emitting part 17 and the light receiving part 18 of the reflective photosensor 10. The light emitted from the light emitting portion 17 of the photosensor 10 passes through the slit 15 and is reflected by the reflecting surface of the reflecting portion 7, and then passes through the slit 15 again and can be received by the light receiving portion 18. Since the width of the output current of the reflective photosensor 10 can be set narrow, it is useful for improving the accuracy of the photosensor 10. 6 indicates the width of the output current passing through the slit 15 of the mask 14 with respect to the axial angle, and β shows the width of the output current with respect to the axial angle in the case shown in FIG.

[0013]

In the present invention, the means having the function of detecting the axial position of the motor for driving the rotary drum of the variable display device of the pachinko gaming machine is housed inside the rotor, so the number of steps for providing a complicated member outside is eliminated. , The motor itself is compact, and the reflection part and the non-reflection part of the light from the photo sensor are integrally formed on the rotor and the inner side surface, so that the structure is simple, the manufacturing cost is reduced, and the reflection surface of the non-reflection part is reduced. To
Provided to form a predetermined inclination angle with respect to the photo sensor
Therefore, while the rotor is rotating, the light from the photo sensor
Prevents the light from being reflected by the reflection part and received by the light receiving part.
The surface that forms the inclination angle has a satin finish and is non-reflective.
Can more effectively prevent the reflection of light in the section
This contributes to improving the accuracy of the motor shaft position detection function.
There is a fruit.

[Brief description of drawings]

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

FIG. 1B is a cross-sectional view taken along the line CC of FIG.

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

FIG. 2A is a front view of a reflective photo sensor.

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

FIG. 2C is an enlarged schematic diagram of the non-reflective surface of the rotor and the photo sensor.

FIG. 3 is a circuit diagram for output detection.

FIG. 4 is an output current with respect to a shaft angle of a photo sensor, a position output detection transistor output waveform, a motor drive waveform, and AND.
Logic circuit output waveform diagram.

FIG. 5A is a schematic cross-sectional view of a photo sensor without a mask.

FIG. 5B is a schematic cross-sectional view of a photo sensor provided with a mask.

FIG. 6 is a graph showing a width of an output signal with respect to an axis angle.

FIG. 7 is a perspective view of a rotary drum of the variable display device of the pachinko gaming machine.

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

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

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

FIG. 10B is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Mounting Plate 2 Magnetic Pole Plate 3 Coil 4 Motor Shaft 6 Rotor 7 Reflecting Part 8 Non-Reflecting Part 9 Bearing 10 Reflective Photo Sensor 11 Circuit Board 14 Lead Wire Mask 15 Slit 16 Detection Circuit 17 Light Emitting Section 18 Light Receiving Section 19 DC Power Supply 20 A Phase Input 21 B-phase input 22 Zener diode 23 Position output transistor 24 AND logic circuit 25 Switching transistor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-58968 (JP, A) JP-A 1-227698 (JP, A) Actually open 1-14-1785 (JP, U) Actually open 63- 182665 (JP, U) '89 Latest Optical Semiconductor Device Specification Table CQ Publishing Company, P.P. 321

Claims (1)

[Claims] 1. A motor for driving the rotating drum of a variable, variable display device into a plurality of display states are arranged in pachinko platen, position detection having a reflecting surface formed on a part of the inner surface of the rotor Symmetric with the reflection part and the position detection reflection part
The non-reflective portion formed on a part of the inner surface of the rotor is provided on the mounting plate of the rotor bearing so that the non-reflective portion can be sequentially faced with the non-reflective portion while the rotor is rotating.
A position detecting device for a rotary shaft of a motor of a pachinko gaming machine, in which a mounting reflection plate is provided with a reflection type photo sensor and a detection circuit capable of outputting a drive signal and a position detection signal .
And the light from the light emitting part is reflected by the non-reflecting part while the rotor is rotating.
In order to prevent light from being received by the light receiving section of the photo sensor .
Therefore, place the reflective surface of the non-reflective part against the reflective photo sensor.
It provided so as to form a tilt oblique angle constant, versus the photosensor
And wherein a surface of the non-reflective portion that direction has no a satin finish
A position detection device for the motor rotating shaft of a pachinko machine .