JPH0376766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a rotary solenoid that rotates back and forth through a constant angle.

[Prior art and its problems]

Examples of this type of rotary solenoid include:
An example is a rotary solenoid for driving an operating lever that hits pachinko balls in an electric pachinko game machine. This will be explained with reference to FIG. In the figure, a pair of magnetic poles 2a, 2b whose tips are arcuate are integrally protruded from the inner periphery of an annular stator yoke 1 and are opposed to each other.
A pair of salient poles 4 in an arc shape with a gap in between
A and 4b are formed, and a rotor 4 made of a magnetic material with a rotating shaft 5 provided at its axis is arranged concentrically, and a bracket (not shown) that rotatably supports the rotating shaft 5 is attached to the stator yoke 1. Stator coils 3a and 3b are wound around the pair of magnetic poles 2a and 2b, respectively, and connected in series to a DC power source 9. An operating rod 6 is attached to the rotating shaft 5, and the operating rod 6 is Stoppers 7 and 8 for regulating the rotation range are provided protruding from a mounting plate (not shown), so that the operating rod 6 can be rotated by a certain angle α between the stoppers 7 and 8, and the operating rod 6 is connected to the stator. When the coils 3a and 3b are not energized, they are received by a stopper 7 which is the starting side, and the DC power source 9
As a result, when current flows through the stator coils 3a, 3b, magnetic flux flows through the magnetic poles 2a, 2b via the rotor 4, and the magnetic poles 2a, 2b are magnetized, for example, into N and S poles, and the magnetic poles 2a, 2b and salient poles 4a, 4b are magnetized. A suction force acts between them, and the operating rod 6 moves in the direction of arrow _F1 together with the rotation of the rotor 4, hitting a pachinko ball (not shown) that has been transferred to the vicinity of the stopper 8, which is the end of the movement, and hits the stopper. 8 and the current is cut off, causing the rotor 4 to return to rotation until the operating rod 6 is received by the stopper 7 on the starting side, and then energizing the stator coils 3a and 3b again, in the same manner as described above. Operate to hit the pachinko ball, and press the operation lever 6.
Return to starting position. Since the frequency of hitting balls in an electric pachinko game machine is stipulated by law to be within 100 balls per minute, the stator coils 3a and 3b are energized by a pulse signal outputted at a constant cycle by a control circuit (not shown). It is becoming more and more controlled.

However, there are only a few electric pachinko game machines that use a rotary solenoid configured in this way.
If 100 machines were installed and used simultaneously, there would be a problem in that the power supply voltage would fluctuate drastically, and the torque generated in the rotor would fluctuate, making the hitting force against the pachinko balls unstable. In order to improve this, increasing the coil current and increasing the torque results in the problem of increasing the power supply capacity and increasing the size of the power supply device. It is necessary to use a large device, which has the drawback of making the device expensive. Moreover, if the magnetic flux density is kept constant and the torque is increased, the solenoid itself becomes larger, making it difficult to install it in a narrow space.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a device that can obtain high torque without increasing the current or increasing the size of the solenoid itself. It's about doing.

[Summary of the invention]

In order to achieve the above object, the present invention provides a notch diagonally in at least one of the U-shaped magnetic poles of the stator yoke and the salient poles of the rotor.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. In Figures 1 and 2, 11
The stator yoke is formed by stacking U-shaped electromagnetic steel sheets punched out to a predetermined thickness and fixing them with rivets or the like. On the inner surface of the open end of the stator yoke 11, magnetic poles 11a and 11b whose tips are in a concentric arc shape with a rotor 12, which will be described later, are integrally formed facing each other. The cutout portions 11c and 11d are provided at diagonal positions. Reference numeral 13 denotes a stator coil wound around the bridge portion 11e of the stator yoke 11, and the coil frame 1 is divided into two with an arcuate cross section.
3a and 13a are fitted from both sides of the laminated end face of the bridging portion 11e and bonded with adhesive tape or the like, and a coil conductor (not shown) is wound around the coil frame 13a a predetermined number of times. The rotor 12 has a pair of salient poles 12 formed by a magnetic rod-like body having a length corresponding to the stacking thickness of the stator yoke 11.
a, 12b are formed in an arc shape, and the rotation axis 1 is located at the axis center.
2c is provided to protrude from the axial end face.
Reference numeral 14 denotes a bracket which has a bearing part in the center part through which the rotating shaft 12c of the rotor 12 is inserted and rotatably supports it, and which extends from both sides and is attached to both sides of the stator yoke 11 in the stacking direction with screws 15. be. Reference numeral 16 denotes a mounting seat made of a nut material and disposed on one side of the stator yoke 11 in the stacking direction and fastened from the other side with a mounting screw 22. Reference numeral 17 denotes an operating rod that is attached to one end of the rotating shaft 12c of the rotor 12 and moves together with the rotor 12. This operating rod 17 will be explained with reference to FIG. 3, which shows a ball hitting rod for pachinko balls in an electric pachinko game machine.
The rotary solenoid is mounted on the mounting board 18 by passing one end of the rotary solenoid through the mounting seat 16 of the stator yoke 11 with a screw 19, and attaching the rotary solenoid to the mounting board 18.
The base of the operating rod 17 is movably attached to the rotation shaft 12c passing through the rotation shaft 12c, and stoppers 20, 21 are provided on the mounting board 18 to restrict the rotation range of the operating rod 17.
is attached so as to restrict the rotation angle of the operating rod 17 to, for example, 60 degrees. This stopper 2
0, 21, the position of the stopper 20 on the starting side is the magnetic pole 11a, 11 of the stator yoke 11.
The rotor 12 rotates by θ ₁ (for example, 5°, θ ₁ in Fig. 4) so that the pole centers of the salient poles 12a and 12b of the rotor 12 are perpendicular to the line connecting the pole centers of b. In this state, the operating rod 17 is installed so that it is received by the stopper 20, and the position of the stopper 21, which is the final movement side, is, for example, 60 degrees from the above θ ₁ (θ ₂ in Fig. 4), and the operating rod 17 is attached to the stopper 20. 21.

Next, to explain its operation, a current flows through the stator coil 13 from a DC power supply (not shown), and the main magnetic flux generated in the stator yoke 11 is generated by the magnetic poles 11a, 11b, the salient pole 12a of the rotor 12,
12b, through the part where the permeance is maximum (points a and b in Figure 3), while
The permeance between the notches 11c, 11d provided in a, 11b and the salient poles 12a, 12b becomes small, making it difficult for the main magnetic flux to flow, and the torque generated in this part (in the direction opposite to the arrow _F2 shown in Fig. 3) becomes smaller. torque)
is reduced, and the rotor 12 has notches 11c, 1 as shown by curve A in the torque one-angle characteristic diagram in FIG.
Compared to the curve B where 1d is not provided, a torque with a steep rise and a greatly increased maximum torque value is generated, and the rotor 12 is rotated in the direction of arrow _F2 .

The operating rod 17 operates in conjunction with the rotor 12.
The pachinko ball (not shown) is rotated in the direction of arrow _F2 , and the pachinko ball (not shown), which is being transferred to the vicinity of the stopper 21 on the final movement side, is hit by the operating rod 17.
7 comes into contact with a stopper 21, and in response to an output signal from a control circuit (not shown), electricity is cut off to the stator coil, and the operating rod 17 is returned to the starting position by its own weight or other means.

In this way, the magnetic pole 11 of the stator yoke 11
By providing notches 11c and 11d on the diagonal lines of a and 11b, the maximum torque can be increased by about 1.7 times when the current to stator coil 13 is constant compared to the case where notches 11c and 11d are not provided. It has been confirmed by the inventor that the amount can be increased by two times.

FIG. 5 shows the magnetic poles 11a, 1 of the stator yoke 11.
Notches 11c', 1 provided diagonally on 1b
1d' is cut out linearly, FIG. 6 shows a case where notches 12c and 12d are provided at diagonal positions of the salient poles 12a and 12b of the rotor 12, and FIG. Magnetic poles 11a, 11b
and the salient poles 12a and 12b of the rotor 12,
Notches 11c″, 11b″ and 1
2c' and 12d' are installed facing each other. In either case, the maximum torque value can be increased without increasing the size of the solenoid itself or increasing the current, as described above. The width can be increased.

Although the above embodiment has been described as a rotary solenoid applied to an electric pachinko game machine, the present invention is not limited to this and can of course be applied to other machines.

〔Effect of the invention〕

According to the present invention, at least one of the U-shaped magnetic poles of the stator yoke and the salient poles of the rotor is provided with a notch diagonally, so that the generated magnetic flux is directed in the rotating direction of the rotor. The maximum torque generated at the rotor can be greatly increased without increasing the coil current or increasing the size of the solenoid itself. . This means that even if the power supply voltage fluctuates rapidly,
It is possible to obtain the desired torque and respond stably to the load without increasing the power supply capacity, and the element components of the control circuit that controls the solenoid are highly versatile, without requiring large rated current values. This has the great advantage that it can be constructed from parts, and is particularly suitable for devices such as electric pachinko game machines in which a large number of machines are used in parallel at the same time.

In addition, since it is possible to increase the torque without increasing the size of the solenoid itself, it can be configured to be smaller and more compact, making it easier to install in narrow spaces and saving power. It is possible to expand the scope of application.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a side view of FIG. -Angle characteristic diagrams, FIGS. 5 to 7 are explanatory views of main parts showing other embodiments of the present invention, and FIG. 8 is an explanatory view showing a conventional example. 11: Stator yoke, 11a, 11b: Magnetic pole, 11c, 11c', 11c'', 11d, 11d',
11d'': notch, 11e: bridge, 12: rotor, 12a, 12b: salient poles, 13: stator coil, 12c, 12c', 12d, 12d': notch,
17: Operation rod, 20, 21: Stopper.

Claims (1)

[Claims] 1 A pair of magnetic poles facing each other and having arcuate tips are integrally formed inside the open end of the stator yoke, which is U-shaped and has a stator coil wound around the bridge portion. In a rotary solenoid, a rotor having a pair of salient poles having an arc shape is arranged concentrically with a gap between them, and an operating rod attached to the rotary shaft of the rotor is rotated back and forth at a certain angle, A rotary solenoid characterized in that a notch is diagonally provided in at least one of the magnetic poles of the stator yoke and the salient poles of the rotor.