JPH0339708B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a rotating cylindrical structure in which a magnetic pole generating section is fixed to a spindle, and the magnetic pole generating section is enclosed and rotated by the magnetic force of the magnetic pole generating section. An electromagnetic drive machine is constructed by rotatably attaching the spindle to the spindle, a firing rod is provided on the rotator of the drive machine, the spindle is rotatably attached to the mounting board, and the magnetic pole is set by operating the ball-striking operation unit. By changing the stopping angle of the generating part, the rotation angle of the rotator is changed,
This invention relates to an electric ball hitting device for a pachinko machine that adjusts the return force of the traction spring to adjust the spring force of the firing rod.

<Prior art> A conventional ball hitting device for a pachinko machine using a rotary solenoid has at least one pair of magnetic poles fixed to the outside of a rotatable rotor located at the center, facing toward the center, and the magnetic poles are energized. A field pole is formed by winding a coil, and the rotor at the center is rotated by a certain angle by magnetic force, and this rotational force is transmitted to the firing rod via the rotation axis of the rotor, causing rapid rotation of the firing rod. The ball was hit at the firing position by the .

In addition, to adjust the firing force of the firing rod,
As shown in Publication No. 57-16825, the amount of rotation of the firing rod can be controlled by rotating the stopper that regulates the firing preparation position of the firing rod by rotating the handle and changing the firing preparation position of the firing rod. It was increased or decreased and the explosive power was adjusted.

<Problems to be Solved by the Invention> The conventional electric ball hitting device described above requires a space in the center for the rotor to rotate, so if an attempt is made to increase the number of turns of the excitation coil to increase the generated torque, the device will become significantly larger. In addition, it was difficult to obtain large torque despite the large size.

Furthermore, since the firing rod that fires the ball is connected to the rotating shaft of the rotor, the length of the firing rod becomes long. For this reason, lateral vibration is likely to occur during rotation, resulting in inconveniences such as uneven flight of the ball and unstable flight distance.

Further, in adjusting the spring force of the firing rod, a stopper is required to regulate the firing preparation position of the firing rod. This stopper is required to be wear resistant, but if a hard material is used, when the firing rod comes into contact with the stopper and stops, an abnormal noise will be generated, which will be heard in the hands of the player who is holding the handle. It was making me feel uncomfortable. Furthermore, the flight distance of the ball is adjusted by rotating the stopper by rotating the handle and changing the initial position (launch preparation position) of the firing rod, but when the firing rod collides with the stopper, the firing rod As the ball rebounded a little, the initial position of the firing rod varied, making it impossible to accurately adjust the flight distance of the ball in response to the amount of rotation of the handle.

On the other hand, in this type of electric ball hitting device, if electrical parts such as variable resistors are used to adjust the firing force of the ball, these electrical parts are likely to break down in pachinko machines that are frequently operated. Furthermore, repairs required a specialized technician, making it difficult to repair them easily at pachinko parlors. In addition, if the resistance value of a variable resistor is changed to electrically adjust the electromagnetic force to adjust the launch force of the batted ball, the resistance value will change due to the temperature rise due to heat generation, so the flight of the batted ball will change. There is a disadvantage that the distance tends to vary.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and reduces the lateral vibration of the firing rod during the firing operation of the ball, and eliminates uneven skipping by eliminating the need for a stopper to regulate the initial position of the firing rod. The purpose of the present invention is to provide an electric ball hitting device for a pachinko machine that can operate a stable ball flight distance and that can be easily maintained, inspected, and repaired even at a pachinko parlor. The magnetic pole generator, which becomes a magnetic pole by supplying power to the coil, is fixed to the spindle, and a cylindrical rotator containing the magnetic pole generator and rotated by the magnetic force of the magnetic pole generator is rotatably attached to the spindle. A firing rod is provided on the cylindrical rotor of the electromagnetic driving machine, and under normal conditions, the firing rod is initially biased by a traction spring toward the firing position at the base end of the firing rail. The shaft is rotatably attached to the mounting board, and the shaft rotation member fixed to the support shaft is connected to the variable member of the ball-striking operation section, and the stop angle of the magnetic pole generating section is changed by operating the ball-striking operation section. Accordingly, the rotation angle of the rotator is changed, thereby adjusting the return biasing force of the traction spring, thereby adjusting the elastic force of the firing rod.

<Operation> In normal conditions, the firing rod is initially biased by the traction spring toward the firing position at the base end of the firing rail.

When you operate the batting operation part, the variable member rotates,
As the spindle rotating member connected to the variable member rotates, the stopping angle of the magnetic pole generator changes, and the rotating angle of the rotator becomes larger than normal, which causes the mechanical force of the traction spring itself to change. The return biasing force is increased and the firing force of the firing rod can be adjusted.

When power is supplied to the excitation coil, a magnetic force is generated in the magnetic pole generator, and the rotor rotates toward the firing preparation position, and the firing rod provided on the rotor also rotates to the firing preparation position.

Then, when the power supply to the excitation coil is stopped, the firing rod is rotated back toward the firing position at the base end of the firing rail by the biasing force of the mechanical traction spring corresponding to the rotation angle of the rotator, and the firing rod is rotated back toward the firing position at the base end of the firing rail. hit the ball.

<Example> The present invention will be described below based on drawings of an example.

An electric ball hitting device 1 according to the present invention includes an electromagnetic drive machine 4 provided on a mounting board 3 attached to a lower part of the back surface of a frame-shaped front frame 2 of a pachinko machine, and a firing rod 6 attached to a rotor 5 of the electromagnetic drive machine 4. and the firing rod 6
is initially biased toward the firing position 8 at the base end of the firing rail 7 by the traction spring 9, the firing rod 6 is rotated in a direction away from the firing position 8 by the driving force of the electromagnetic drive machine 4, and then the traction spring 9 The firing rod 6 is rapidly returned and rotated by the biasing force of , and the ball at the firing position 8 is hit.

As shown in FIG. 2, the electromagnetic drive machine 4 includes a magnetic pole generator 1 that becomes a magnetic pole by supplying power to an exciting coil 10.
1 to the spindle 12, and the magnetic pole generator 1
A cylindrical rotating body 13 is fitted on the outside of the rotating body 1 and rotatably attached to the support shaft 12.

The magnetic pole generator 11 is made of a magnetic material such as iron,
A spindle 12 which has an end that becomes a magnetic pole on the outer circumferential side, and also includes an excitation coil 10 that generates an S pole, an N pole, etc. in the end, and attaches these to the mounting board 3.
It is fixed at Magnetic pole generator 11 shown in FIG.
A disk-shaped side plate 15 is formed at one end of the cylindrical boss 14, and magnetic pole generating pieces 16a, 16b, 16 slightly shorter than the boss 14 are formed from the outer peripheral edge of the side plate 15.
A first magnetic pole generating member 11a extending horizontally at three locations with a distance of 120 degrees from each other and a second magnetic pole generating member 11b having the same configuration as the first magnetic pole generating member 11a are connected to both magnetic pole generating pieces 16a. 16d, 16b and 1
6e, 16c, and 16f are combined in a substantially cylindrical shape so as to face each other, and end portions 16a' and 16d', 16b' and 16e', located approximately in the center on the outer circumferential side,
16c' and 16f' face each other with a distance l, and the bosses 14,1
A space 17 for accommodating the excitation coil 10 is formed around 4'. Note that if the end surface of one boss 14' is formed into a convex shape and the end surface of the other boss 14 is formed into a concave shape and then fitted together, the first magnetic pole generating member 11a and the second magnetic pole generating member 11b can be reliably joined at a predetermined position. can do.

The excitation coil 10 is made by winding a conducting wire, and in the illustrated embodiment, it is wound into a cylindrical shape so that all the magnetic pole generating pieces 16a, 16b, 16c, . . . can be excited by a single excitation coil, and a wire is formed at the center. The bosses 14, 14' are inserted from both openings of the through hole 18, respectively.
is inserted and accommodated in the space 17. The excitation coil 10 may have any configuration as long as it can excite the magnetic pole generating section 11 by energization, and may be provided for each magnetic pole generating piece 16, or it may be provided for each magnetic pole generating piece 16, or it may be provided for each of the bosses 14, 14' as in the embodiment. It may be wound along the length or radially from the bosses 14, 14'.

In order to rotatably attach the magnetic pole generating section 11 and the excitation coil 10 to the mounting board 3, the magnetic pole generating section 1
The support shaft 12 is fitted into the bosses 14 and 14' of the support shaft 12, and the base end of the lever-shaped support shaft rotation member 19 is fixed in the middle of the support shaft 12 with a screw or the like. The magnetic pole generator 11 and the exciting coil 10 are integrated. And the support shaft 12 on the support shaft rotation member 19 side
The tip is inserted into the shaft hole 20 from the back side of the mounting board 3 and fitted into the bearing 21 attached to the surface of the mounting board 3. The bearing 21 has bearings 23, 23 fitted into both ends of a cylindrical housing 22, and a flange 22' formed at one end of the housing 22 screwed to the surface of the mounting board 3.
3 and 23, the support shaft 12 can be rotatably supported. In the illustrated embodiment, the support shaft 12 is passed through the magnetic pole generation section 11, but independent shafts may be provided on both sides of the magnetic pole generation section 11, and the attachment may be performed using these shafts, or the support shaft may be attached to the first magnetic pole. Generating member 1
1a and may be rotatably attached to the mounting board 3.

The rotor 5, which rotates along the outer circumferential surface of the magnetic pole generating section 11 formed as described above, carries the cylindrical rotating body 13 so as to enclose the magnetic pole generating section 11 on the outside of the magnetic pole generating section 11. The rotating body 13 is rotatably provided.
A magnetic adsorption plate 26 is disposed on the body portion of the magnetic pole generator 11 in correspondence with the portion that becomes the magnetic pole of the magnetic pole generating portion 11, that is, the end portions 16a', 16b', . In the illustrated embodiment, disks 24 and 24' having a diameter slightly larger than that of the magnetic pole generating section 11 are rotatably attached to the supporting shaft 12 protruding from both sides of the magnetic pole generating section 11 by bearings 25 and 25, respectively. support,
Three magnetic adsorption plates 26a, 26b, 2 made of magnetic material such as iron are arranged at intervals between the outer peripheries of both discs 24, 24'.
6c are installed at 120 degree intervals corresponding to the three pairs of ends 16a' and 16d', 16b' and 16e', and 16c' and 16f', and are fixed with screws, etc., and the remaining parts are covered with synthetic resin. Protective side plates 27a, 27b, 27c made of non-magnetic material such as
It is configured to be able to rotate concentrically with the enclosed magnetic pole generating section 11.

Note that the distance between the inner surfaces of the magnetic adsorption plates 26a, 26b, and 26c and the outer surface of the magnetic pole generating section 11 is desirably close enough that they do not come into contact with each other.

In addition, in the illustrated embodiment, the magnetic adsorption plate 2
6a, 26b, 26c and protective side plates 27a, 27
The body of the cylindrical rotating body 13 was constructed by fixing the cylindrical rotating body 13 alternately in the circumferential direction. Magnetic adsorption plates 26a, 26b, and 26c may be fixed to the inner or outer surface of the protective side plate. In FIG. 2, reference numeral 28 indicates an arc-shaped elongated hole formed in the disc 22, through which the conducting wire 10' of the coil 10 passed through the conducting wire take-out hole 29 formed in the magnetic pole generating section 11 is inserted. It has an appropriate length that does not cause any problem even when the rotator 5 rotates. Instead of opening this elongated hole 28, a notch may be provided. The firing rod 6 that shoots the ball has a springing part 6' made of an elastic body at the upper end.
The base end is fixed to the rotator 5, and the rotor 5 rotates integrally with the rotor 5. In order to urge the firing rod 6 toward the firing position 8 at the base end of the firing rail 7, a traction spring 9 is stretched between the stay 30 protruding from the rotator 5 and the protrusion 31 of the mounting board 3. do. Note that this traction spring 9 moves the firing rod 6 to the firing position 8.
Any configuration may be used as long as it has the function of biasing toward. For example, it may be directly connected to the firing rod 6, or the free end side of the support shaft 12 may be extended, and a helical spring may be fitted to the extended portion to bias it.

In the illustrated embodiment, the proximal end of the firing rod 6 is fixed to the disk 24 on the mounting board 3 side with screws, but it may be formed integrally with one of the magnetic adsorption plates 26, for example 26a, so that the entire L The vertical part of the L-shape may be used as the firing rod 6, and the horizontal part may be used as the suction plate 26a. When integrally molded with the suction plate 26 in this manner, both can be attached and detached by one operation. That is, by screwing the left and right ends of the suction plate 26 to the disks 24, 24', the firing rod 6 can be firmly fixed.

As described above, since the firing rod 6 in the present invention is fixed to the cylindrical rotating body 13, the length can be made shorter than that fixed to the output shaft of a conventional rotary solenoid. Therefore, lateral vibration during rotation can be extremely reduced, and defective firing caused by lateral vibration can be eliminated.

To attach the ball hitting device 1 constructed as described above to a pachinko machine, as shown in FIG.
Place the mounting board 3 at a predetermined position on the back surface of the front frame 2 so that the projecting portion 6' of the board enters the firing position 8 at the base end of the firing rail 7 attached to the game board, and secure it with screws or the like. . In order to adjust the firing part 6' of the firing rod 6 to enter the center of the firing position 8, a shim or the like is inserted between the bearing 21 and the mounting board 3, and the position of the firing rod 6 is adjusted. adjust.

The ball hitting device 1 according to the present invention includes a magnetic pole generating member 11
By changing the stop angle of the rotor 5, the rotation angle of the rotator 5 is changed, thereby adjusting the return urging force of the traction spring 9, thereby adjusting the firing force of the ball. Therefore,
A stopper 32 made of rubber or the like is planted on the mounting board 3 below the firing position 8, and the stopper 32 regulates the forward stopping position of the firing rod 6. This stopper 32 is arranged so that the firing portion 6' of the firing rod 6 is at the firing position 8.
It is placed in such a position that it will come into contact with the launch rod 6 immediately after entering.

Further, in order to regulate the rear stopping position of the firing rod 6, the stopping angle of the magnetic pole generating member 11 is adjusted by rotating the spindle rotating member 19 to a desired position, and the stopping angle of the magnetic pole generating member 11 is adjusted. The rearward rotation angle of the rotator 5 is adjusted by the stop angle. For this purpose, a variable member 33 for adjusting the stop position of the spindle rotating member 19 is exposed on the back side of the mounting board 3, and the variable member 33 is connected to a ball hitting operation section 34 on the front surface of the pachinko machine.

As shown in FIG. 5, the ball-hitting operation section 34 includes an operation lever 38 rotatably provided between a front handshake member 35 and a rear handshake member 37 having a cylindrical holding section 36. is urged counterclockwise by a spring 39, and the base end of the holding portion 36 is brought into contact with the front surface of the mounting board 3, and is fixed from the rear surface of the mounting board 3 with screws 40. Then, the shaft 41 of the operating lever 38 is made to penetrate through the inside of the rear handshake member 37 and protrude from the back surface of the mounting board 3.
1, the variable member 33 is fixed to the tip with a screw or the like. The variable member 33 shown in FIGS. 4 and 5 is a spiral cam whose distance from the shaft 41 gradually increases, and is designed to prevent the vibration of the spindle rotating member 19 from being transmitted from the ball-striking operation section 34 to the player. It consists of a cushioning material such as rubber. In the natural state (fourth illustrated line) in which the operating lever 38 is not rotated, the spindle rotating member 19 biased by the spring 39 comes into contact with the cam circumferential surface with a small eccentricity (distance from the shaft). As the operating lever 38 is rotated clockwise, it comes into contact with the circumferential surface of the cam with a large amount of eccentricity, as shown by the dotted line in FIG. 4, and rotates the magnetic pole generator 11 in the direction of arrow A in FIG. It is set as. That is, the magnetic pole generating member 11 is
It rotates in accordance with the amount of rotation of the operating lever 38. Therefore, the firing preparation position where the firing rod 6 is separated from the firing position 8 and stopped moves backward according to the amount of rotation of the operating lever 38, and the rotation angle of the firing rod 6 is determined by the amount of rotation of the operating lever 38. It will increase accordingly.
And the larger the rotation angle of the firing rod 6,
Since the traction spring 9 strongly biases the firing rod 6, the return rotation speed of the firing rod 6 increases, and the kinetic energy of the firing rod 6 also increases, which increases the elasticity of the ball and increases the impact of the ball. The flight distance is also extended.

In order for the firing rod 6 to rotate back and forth between the firing preparation position and the batted ball firing position, the firing rod 6 must be in the firing preparation position and at the maximum angle of inclination, that is, the firing rod 6 When the rotation angle of the rotator 5 is maximized (dotted line in Figure 4), the magnetic pole generator 1
The ends 16a', 16b'... of 1 and the center lines of the magnetic adsorption plates 26a, 26b... provided correspondingly coincide with the radial straight line from the support shaft 12, so that the overlapping area is maximized. The positional relationship between the magnetic pole generator 11 and the adsorption plate 26 is adjusted in advance. Then, when the firing rod 6 is rotated back to the ball firing position by the bias of the traction spring 9, the overlapping area is reduced or becomes zero. However, even if the overlapping area is zero, when power is supplied to the excitation coil 10, the ends 16a', 16b'... of the magnetic pole generator 11 and the magnetic adsorption plates 26a, 26b... provided correspondingly are attracted to each other. Make sure it matches.

Next, the operation of the ball hitting device 1 will be explained. When a player turns the rotatable operating lever 38 of the operating section 34 provided at the lower part of the front side of the pachinko machine, the activation switch 43 provided inside the operating section 34 is activated by the pressure of the pressing piece 44 of the operating lever 38. When it is opened and turned on, a pulse of a constant width is supplied to the excitation coil 10 connected via a lead wire from the control circuit 45 that controls the rotation of the firing rod 6, and the excitation coil 1
0 is momentarily excited. As a result, the magnetic pole generating section 11 is magnetized, and each magnetic pole generating piece 16a, 16b, 1
A magnetic pole is generated at each end 16a', 16b', 16c', . For example, the support shaft rotating member 19 side is N.
If it is a pole, the other end becomes the S pole, and the magnetic flux coming out from the N pole is at the end 1 of the magnetic pole generating pieces 16a, 16b, 16c.
6a', 16b', and 16c' respectively form N poles, and the ends 16 of the other magnetic pole generating pieces 16d, 16e, and 16f.
S poles are formed at d', 16e', and 16f', respectively. Therefore, the magnetic pole generating piece 16a end 16a' (N pole), end 16d' (S pole), 16b' (N pole) and 16e' (S pole)
very)
A strong magnetic field is generated between 16c' (N pole) and 16f' (S pole), and the respective adsorption plates 26
a, 26b, and 26c are instantly attracted. Due to the attractive force of this magnetic force, the rotator 5 rotates in the direction of arrow A in FIG. 4 against the bias of the traction spring 9. In this case, when the player operates the operating lever 38 to the maximum rotation amount, as described above, the magnetic pole generating section 11 is also rotating greatly, so the rotation angle of the rotator 5 increases, and the traction spring The return urging force 9 also increases, and the firing rod 6 is rotated to the dotted line in Figure 4 and stopped.
On the other hand, if the amount of rotation of the operating lever 38 is less than the above, the amount of rotation of the rotator 5 will also decrease, and the return biasing force of the traction spring 9 will also decrease, causing the firing rod 6 to move halfway (as shown by the two-dot chain line in FIG. 4). Rotate it until it stops.

By the time the ends 16a', 16b'... of the magnetic pole generator 11 and the magnetic adsorption plates 26a... overlap, even if the start switch 43 is ON, the pulse power supply to the excitation coil 10 is stopped, so the magnetic pole The magnetic field at each end of the generator 11 disappears. For this reason, the rotator 5 is rapidly returned and rotated by the bias of the traction spring 9. Therefore, the springing portion 6' of the firing rod 6 enters the firing position 8 and hits the ball at the firing position 8. Note that the rebound force of the ball can be adjusted as desired by changing the stop angle of the firing generating section 11 and changing the return biasing force of the traction spring 9, as described above.

When the next pulse is supplied to the excitation coil 10, the magnetic pole generator 11 is again excited, causing the rotator 5 and the firing rod 6 to rotate integrally. Thereafter, by repeating this process, the ball at the firing position 8 is intermittently hit.
Note that the control circuit 4 supplies pulse power to the excitation coil 10.
5 is a pulse generation circuit 46 as shown in FIG.
A known method may be used that amplifies pulses from the source using a power amplification circuit and supplies pulse power. Further, the activation switch 43 may be configured by a micro switch as in the above embodiment, or the batting ball operating portion 34 may be chrome plated to provide conductivity, so that when the player touches the batting ball operating portion 34. It may also be configured by a so-called touch switch that is turned on at times.

As described above, the electric ball hitting device 1 according to the present invention includes:
The balls supplied to the firing position 8 can be hit one after another, and the flight distance of the balls can be determined by rotating the magnetic pole generator 11 to change its stopping angle, and by mechanically returning the traction spring 9. It can be adjusted as desired by changing the forces. Then, the ball supply mechanism supplies balls one by one to the empty firing position 8 in synchronization with the firing operation of the firing rod 6. Note that the ball supply mechanism may have any configuration as long as it has a function of supplying balls one by one. For example, the ball feeding mechanism shown in FIG. 1 tilts an operating cam 49 each time a firing operation is performed by a hook-shaped rod 48 provided on the firing rod 6, and the ball feeding member 50 is actuated by the tilting of the operating cam 49. The balls guided from the supply tray 51 on the front of the pachinko machine are sent to the outlet 5
2 to the firing position 8.

<Effects of the Invention> As explained above, according to the present invention, the magnetic pole generating portion that becomes a magnetic pole by power supply is fixed to the spindle, and the cylindrical shape that includes the magnetic pole generating portion and rotates by the magnetic force of the magnetic pole generating portion is fixed. An electromagnetic drive machine is constructed by rotatably attaching a rotator to the spindle, and a firing rod is provided on the rotor of the electromagnetic drive machine, and the firing rod is initially attached to the firing position by a traction spring. The spindle is rotatably attached to the mounting board, and the spindle rotation member fixed to the spindle is connected to the variable member of the ball-striking operation section, so that lateral vibration when the firing rod rotates can be prevented. By reducing this, inconveniences such as uneven flight can be eliminated, and stable ball launch can be achieved.

In addition, the configuration of this ball flight distance adjustment uses a variable resistor to change the amount of power supplied, in other words, it is not done by changing the electrical electromagnetic rotational force, but by forcing the firing rod to the firing preparation position. This is done by changing the strength of the return biasing force of the mechanical traction spring after the change, so it not only prevents the power supply from the control circuit from becoming unstable due to the heat generated by the resistor, but also prevents the ball from flying unevenly. , and has excellent durability. Furthermore, the angle of the magnetic pole generation part is mechanically adjusted by the spindle rotating member and the variable member, and the firing preparation position of the firing rod is regulated without using a stopper, and the ball is controlled by the mechanical traction spring. Since the bullet is fired by the return biasing force, the generation of abnormal noise and vibration when the firing rod tilts to the firing preparation position and stops when it collides with the stopper is eliminated, and the unpleasant noise to the firing operation part is eliminated. Not only is there no vibration transmission, but there is no rebound of the firing rod due to the stopper.
The flight distance of the ball can be stabilized.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view from the back side of the front frame, Fig. 2 is an exploded perspective view of the electromagnetic drive machine, and Figs. 3 and 4 are Fig. 2. FIG. 5 is an exploded perspective view of the ball-striking operation section, and FIG. 6 is a block diagram of the control circuit. DESCRIPTION OF SYMBOLS 1... Electric ball hitting device, 3... Mounting board, 4... Electromagnetic drive machine, 5... Rotator, 6... Launching rod, 7... Launching rail, 8... Launching position, 9... Traction spring, 10... Excitation coil, 11... Magnetic pole generating section, 12... Support shaft, 19... Support shaft rotating member, 33... Variable member, 34... Ball hitting operation section.

Claims (1)

[Claims] 1. A cylindrical rotator that has an excitation coil, fixes a magnetic pole generation part that becomes a magnetic pole by supplying power to the excitation coil to a spindle, and encloses the magnetic pole generation part and rotates by the magnetic force of the magnetic pole generation part. is rotatably attached to the above-mentioned support shaft to constitute an electromagnetic drive machine, and a firing rod is provided on the cylindrical rotor of the electromagnetic drive machine, and the firing rod is normally pulled toward the firing position at the base end of the firing rail. Initially biased by a spring, the above-mentioned support shaft is rotatably attached to the mounting board, and the support shaft rotation member fixed to the support shaft is connected to the variable member of the ball-striking operation section, and the above-mentioned It is characterized by changing the rotation angle of the rotor by changing the stop angle of the magnetic pole generator, thereby adjusting the return biasing force of the traction spring and adjusting the elastic force of the firing rod. An electric ball hitting device for pachinko machines.