JPH0796054B2 - Ball device for pachinko machines - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ball device for a pachinko machine that utilizes the repulsive force of a permanent magnet.

(Prior Art) A ball-ball device for a pachinko machine uses a cam driven by a motor to pull down the ball-hammer, and when the ball-cam is disengaged from the cam, the spring tension is used to rapidly raise the ball-hammer. It is usual that the ball is made to perform a ball movement. However, such a conventional ball-ball device cannot avoid fluctuations in ball flight caused by surging, buckling, etc. peculiar to springs, and avoid inferior spring quality due to long-term use. Can not. Further, in such a conventional ball hitting device, since the strength of the hit ball is controlled by adjusting the tension of the spring by the dial operation, there is a drawback that the vibration of the hit ball is transmitted to the dial through the wire or the gear.

Therefore, recently, as a new ball-ball device, a system in which a ball hammer is electrically driven by a rotary solenoid has been invented, but a lamp, a motor, which operates at the time of winning a prize,
If a voltage drop occurs due to a change in the load of the solenoid,
There was a drawback that the strength of the hit ball became unstable due to the change in the ball force.

Furthermore, recently, in addition to mounting a permanent magnet on the mallet shaft of a bullet mallet, a permanent magnet with adjustable ball force that can rotate in conjunction with the dial is mounted on the board side to repel the mutual force of these permanent magnets. It is also proposed to use the ball to make a ball movement. However, this ballistic device has the drawback that the repulsive force between the magnets is directly transmitted to the dial and gives a feeling of weight, and it is difficult to obtain the positional accuracy of the permanent magnet for adjusting the ballistic force when assembling the ballistic device. was there.

(Problems to be Solved by the Invention) The present invention solves the conventional problems as described above, can always stabilize the strength of a hit ball, and can transmit the vibration and the feeling of weight of the hit ball to the dial. It was completed to provide a ballistic device for no new pachinko machine.

(Means for Solving the Problems) The present invention made to solve the above problems fixes a permanent magnet on the substrate side of a ball-ball device, and a permanent magnet on the mallet shaft side of the ball-and-hammer. Attach facing the permanent magnet,
Further, a crescent-shaped magnetic shield plate is provided between these permanent magnets, which is pulled out substantially radially between the permanent magnets around the outer shaft by a dial operation.

(Example) Hereinafter, the present invention will be described in more detail with reference to the illustrated examples.

In FIGS. 1 and 2, (1) is the substrate of the ball-ball device,
(2) is a mallet shaft rotatably mounted on the bearing portion of the substrate (1), and (3) is a ball hammer which is integrally mounted on the mallet shaft (2). The maximum deflection angle of the ball hammer (3) is regulated by the stoppers (4) and (5) attached to the substrate (1), and the final retreat angle is a cam for a ball hammer driven by a motor. It is determined by the amount by which the cam follower (6) fixed to the shaft (2) is displaced.

A disk-shaped permanent magnet (7) in a case (7a) is fixed to the substrate (1) side around the mallet shaft (2). This permanent magnet (7) has N at 90 ° intervals as shown in FIG.
The poles and the S poles are distributed. Also, on the side of the hammer shaft (2) of the ball hammer (3), a disk-shaped permanent magnet (8) which is opposed to the hammer and is housed in the case (8a) is attached. As shown in Fig. 3, the S pole of the permanent magnet (7) has an N pole
The poles face each other, and the S pole faces the N pole of the permanent magnet (7). However, when the ball mallet (3) is swung to the final retracted position by the ball cam, the permanent magnet (8) on the side of the mallet shaft (2) moves from the stable position where the S pole and the N pole face each other. When the cam follower (6) is rotated by about -40 ° and is disengaged from the ball cam, the repulsive force of the magnet causes the ball to rapidly return to its original stable position, in which case a ball movement is performed.

Between these permanent magnets (7) and permanent magnets (8),
A magnetic shield plate (9) made of a material having a magnetic shield capability such as an iron plate is provided. This magnetic shield (9) is crescent-shaped and has a shaft (1) outside the permanent magnet (7).
It is possible to swing substantially in the radial direction around (0). The swing amount is adjusted by the dial shaft (11). That is, the wire (1
2) is connected, and when the dial shaft (11) is rotated, the wire (12) is pulled along with it, and the magnetic shield plate (9) is swung about the shaft (10) in a substantially radial direction. The permanent magnets (7) and (8) are moved to the outside. When the dial shaft (11) is returned, the magnetic shield (9) returns to its original position by the action of the return spring (13).

(Operation) In the ball-ball device of the pachinko machine of the present invention configured as described above, when the ball-cam is driven by the motor to forcibly rotate the ball-hammer (3) in the backward direction, the board (1) A repulsive force is applied between the permanent magnet (7) on the side) and the permanent magnet (8) on the side of the mallet shaft (2) facing the permanent magnet (7). From this state, when the ball cam further rotates and disengages from the cam follower (6), the permanent magnet (8) on the mallet shaft (2) side rapidly moves to the position shown in FIG. 1 by the repulsive force. The ball rotates, and at this time, the ball moves.

Further, when the player wants to increase the strength of the hit ball, the crescent-shaped magnetic shield plate (9) is moved to the outside by a dial operation. In this way, when the magnetic shield plate (9) located between the permanent magnets (7) and (8) is pulled outward in the substantially radial direction,
As schematically shown in FIG. 4, the lines of magnetic force between the two magnets are no longer blocked, and the repulsive force increases and the elastic force increases.
On the contrary, a crescent-shaped magnetic shield plate by dial operation (9)
When the magnet is deeply interposed between both magnets (7) and (8), the magnetic force lines are short-circuited as shown schematically in FIG. 5, the repulsive force is reduced, and the flight of the ball is reduced. Thus, the ball force can be freely adjusted by the dial. Moreover, since the magnetic shield plate (9) of the present invention is a member independent of the ball hammer (3), vibration of the hit ball is not transmitted to the dial, and no magnetic force acts on the magnetic shield plate (9) itself. Therefore, the dial can be operated lightly without causing the dial to feel heavy.

Needless to say, the shapes of the permanent magnets (7) and (8), the distribution of magnetic poles, and the like can take various forms other than the embodiment.

(Effect of the invention) As is apparent from the above description, the present invention utilizes the repulsive force between the permanent magnet on the substrate side and the permanent magnet on the mallet shaft side to perform the ball-ball movement. It is possible to avoid the variation of ball jump caused by surging, buckling, deterioration of spring quality, etc. like the conventional one used,
It is possible to eliminate chatter vibration when the mallet is returned by the attractive force of the magnet. Further, in the present invention, a crescent-shaped magnetic shield plate that is pulled out to the outside by a dial operation is provided between the permanent magnets on the substrate side and the permanent magnets on the mallet shaft side to adjust the elastic force. Therefore, there is an advantage that vibration of a hit ball, a feeling of weight, etc. are not transmitted to the dial, and the positions of both permanent magnets can be fixed even when assembling the apparatus, which facilitates the assembling work. In the present invention, since the crescent-shaped magnetic shield plate is swung in the radial direction, when the magnetic shield plate is moved, the permanent magnet on the substrate side and the permanent magnet on the mallet shaft side are shielded from the outer peripheral direction. Become. Therefore, since the center point of the magnetic force does not deviate in the circumferential direction, the rotation angle of the bullet mallet can be made constant at all times.

Therefore, the present invention has an extremely great practical value as a ball device for a pachinko machine that solves the conventional problems.

[Brief description of drawings]

1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway bottom view thereof, and FIG. 3 is a perspective view showing an example of magnetic pole distribution of a permanent magnet, FIGS. 4 and 5. The figure is a cross-sectional view showing the action of the magnetic shielding plate. (1): substrate, (2): mallet axis, (3): ball mallet,
(7): Permanent magnet on the substrate side, (8): Permanent magnet on the mallet shaft side, (9): Magnetic shield plate, (10): Shaft

Claims (1)

[Claims] 1. A permanent magnet (7) on the substrate (1) side of a ball-ball device.
The permanent magnet (8) is mounted on the hammer shaft (2) side of the bullet hammer (3) so as to face the permanent magnet (7), and these permanent magnets (7), (8) are fixed. Between the permanent magnets (7) and (8) centered on the outer shaft (10) by a dial operation, a crescent-shaped magnetic shield plate (9) is drawn outward in the radial direction. A ball-ball device for a pachinko machine.