JP3574414B2 - Ball launch mechanism of pachinko machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for removing static electricity generated by a ball launching mechanism that launches a ball serving as a game medium in a pachinko machine.
[0002]
[Prior art]
Generally, a ball launching mechanism continuously repeats a ball launching operation. In this repeated ball firing operation, there are many parts where two members made of different materials rub against each other, so that a large amount of static electricity is generated due to separation, separation, and friction after contact between the two members. there is a possibility.
[0003]
[Problems to be solved by the invention]
When the static electricity as described above is generated, a control device that performs the game control process through a wiring around the ball launching mechanism is a noise that adversely affects the game control process using a computer or a semiconductor device or the like including a CPU, a ROM, a RAM, and the like. When such noise enters the control device, the game control processing becomes abnormal, and there is a possibility that an appropriate game cannot be continued.
[0004]
Accordingly, the present invention is to provide a ball firing mechanism of the pachinko machine capable of eliminating static electricity.
[0005]
[Means for Solving the Problems]
In the ball firing mechanism according to the present invention, a plunger of an electromagnetic solenoid is movably inserted into an internal space penetrating in a front-rear direction formed by a yoke on which an excitation coil of an electromagnetic solenoid is mounted, and is rearward from the internal space of the yoke. A return spring is mounted on a rear end of the protruding plunger, a front end of the return spring is received by a rear end of the yoke, and a rear end of the return spring is received by a spring stopper connected to the rear end of the plunger. A hammer supporting rod is coaxially coupled to the front end of the hammer, and a hammer that hits a ball as a game medium is attached to a tip of the hammer supporting rod protruding forward from the inner space of the yoke, and a hammer and a front end of the yoke are provided. The hammer support rod between the plunger and the hammer support rod is received by the front end of the yoke by the backward movement of the return spring due to the spring force of the return spring. Have cushioning member for determining the firing start position of mer is fixed, by an interrupting power supply to the exciting coil, a pachinko machine spheres firing mechanism hammer makes a ball firing operations repeating the backward linearly advancing , The return spring received by both the rear end of the yoke and the spring stopper coupled to the rear end of the plunger is formed of a metal coil spring, and the spring stopper is formed of metal. The yoke and the return spring are electrically connected to each other, and the ground wire is connected to the yoke, so that the static electricity generated inside the ball firing mechanism due to the ball firing operation is transferred from the ball firing mechanism to the earth wire. Can be properly escaped.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a ball launching mechanism 14 of a pachinko machine according to the first embodiment. In FIG. 1, as the ball launching mechanism 14, a solenoid mount 51 made of a conductive synthetic resin is mounted on a mechanism base 50 by a backlash absorbing mechanism 52 that absorbs a reaction force of the ball launching drive, and is mounted on the solenoid mount 51 as a ball launching drive source. An example in which the electromagnetic solenoid 70 is mounted will be described.
[0007]
The backlash absorbing mechanism 52 includes a metal guide rail 53, a plurality of dampers 54 mounted on the guide rail 53 and made of an elastic material such as rubber or soft synthetic resin, and a roll guide 55 made of synthetic resin such as polyacetal. A metal roll slider 56 fitted in a groove 55a formed in the roll guide 55, and a damper 57 made of an elastic material such as rubber or soft synthetic resin mounted on the roll guide 55 and the solenoid mount 51. The damper 54; 57 absorbs the reaction force generated in the same direction as the axial direction of the plunger 77 due to the ball firing drive by the electromagnetic solenoid 70, and the mechanism base 50 with the guide rail 53 of the solenoid mount 51 as the center. On the other hand, the roll movement to rotate in the front and back directions in FIG. Overcome by fitting between 55 and roll slider 56.
[0008]
A bush made of a synthetic resin such as polyacetal fixed to the solenoid mount 51 is provided at a fitting portion between the guide rail 53 in which the lower portion of the solenoid mount 51 is movably inserted in the same direction as the movement of the plunger 77 and the solenoid mount 51. The guide rail 53 protruding outward from the solenoid mount 51 is fixed to the mechanism base 50. The damper 54 has fixed receiving portions 59 made of a synthetic resin such as polyacetal at both ends, and one receiving portion 59 is received by a bush 58, and the other receiving portion 59 is fixed to a guide rail 53 by a retaining ring 60. Accepted by. The roll guide 55 is fixed to the mechanism base 50, and the roll slider 56 is fixed to the solenoid mount 51.
[0009]
The electromagnetic solenoid 70 stores an exciting coil 75 mounted on a heat-resistant synthetic resin bobbin 74 in an inner space of an iron-based metal yoke including a main yoke 71, an outer sub yoke 72, and an inner sub yoke 73. A hammer support rod 76 and an iron-based plunger 77 having the hammer support rod 76 coaxially connected thereto are inserted into the bobbin 73 and the bobbin 74, and the hammer support rod 76 protruding outward from the yokes 71 to 73 is made of silicon rubber or the like. A buffer member 78 made of a suitable material and a hammer 79 made of a material such as silicone rubber are mounted so as to prevent falling off and can be replaced, and are attached to a metal spring stopper 80 connected to a plunger 77 projecting outward from the yokes 71 to 73. A metal sheet such as a coil spring is provided between the main yoke 71 and the spring sheet 81 made of synthetic resin such as polyacetal. A spring 82 is disposed, and the buffer member 78 is received by the outer and sub yoke 72 by the spring force of the return spring 82, while one end of the return spring 82 is connected to the main yoke 71, and the other end of the return spring 82 is Connect to The fact that the yokes 71 to 73 and the plunger 77 are connected to each other by the return spring 82 to achieve conductivity has a novel structure.
[0010]
A shock absorbing member 83 made of rubber or soft synthetic resin is fixed to the plunger 77 located inside the return spring 82 on the side of the yoke 71 to 73 from the spring sheet 81 so that the main yoke 71 and the plunger 77 A liner guide 84 made of an iron-based metal and a liner 85 made of a synthetic resin are arranged between them. The liner guide 84 is attached to the main yoke 71, and the liner 85 is attached to the liner guide 84. A liner guide 86 made of an iron-based metal and a liner 87 made of a synthetic resin are disposed between the inner sub-yoke 73 and the hammer support bar 76, and the liner guide 86 is attached to the inner sub-yoke 73, and the liner 87 is connected to the liner guide. 86. A retaining ring 88 made of rubber or soft synthetic resin projecting outward from the inner sub-yoke 73 is received by the bobbin 74, and the outer sub-yoke 72 is joined to the main yoke 71 to support the inner sub-yoke 73.
[0011]
In the above-described structure, when power for ball launch is supplied from a control device such as a ball launch control device (not shown) to the excitation coil 75, a closed magnetic path is formed through the yokes 71 to 73 and the plunger 77, and the plunger 77 is formed. Is rapidly sucked into the inner sub-yoke 73 while compressing the return spring 82, and the plunger 77 is advanced by the sudden suction, so that the hammer 79 is fixed to the mechanism base 50 at a predetermined interval before the metal. It fires so as to hit a ball (not shown) placed on a ball shooting rail 15 made of steel. When the power supply to the exciting coil 75 is cut off, the closed magnetic circuit disappears, the return spring 82 retreats the plunger 77, the buffer member 78 hits the yokes 71 to 73, and the hammer 79 returns to the original position. . By repeating the power supply and the cutoff, the ball firing mechanism 14 continuously repeats the ball firing operation.
[0012]
In the first embodiment, a contact portion between the plunger 77 and the liner 85, a contact portion between the hammer support bar 76 and the liner 87, a contact portion between the guide rail 53 and the bush 58, a contact portion between the receiving portion 59 and the bush 58, A sliding portion between two members made of different materials, such as a contact portion between the roll guide 55 and the roll slider 56, a contact portion between the shock absorbing member 83 and the yokes 71 to 73, and a contact portion between the cushioning member 78 and the yokes 71 to 73. The applicant has confirmed that static electricity is generated due to separation, separation and friction after contact between the two members, and in order to remove the static electricity, First to fifth experiments were performed. At the time of the experiment, a solenoid mount 51 made of a general synthetic resin that is an electrical insulating material was used.
[0013]
In the first experiment, the ground wire A was connected to the yokes 71 to 73 via a 10 kΩ resistor, the ground wire B was connected to the guide rail 53 via a 10 kΩ resistor, and the ground wire C was connected to the roll slider 56. Was connected via a 10 k ohm resistor. In the second experiment, the ground wire A was connected to the yokes 71 to 73 via a 10 k ohm resistor, the ground wire B was connected to the guide rail 53 via a 10 k ohm resistor, and the ground wire C was Was removed. In the third experiment, the ground wire A was directly connected to the yokes 71 to 73, and the ground wire B was directly connected to the guide rail 53. In the fourth experiment, the ground wire A was directly connected to only the yokes 71 to 73 without inserting a resistor. In the fifth experiment, the ground wire B was directly connected only to the guide rail 53 without inserting a resistor.
[0014]
In the first to fifth experiments, while the ball launching mechanism 14 was activated to launch a ball, a 5 volt control power supply of a ball launch control device (not shown) was observed, and the trigger voltage of the oscilloscope was set to 6 volts. When it was checked whether or not the noise occurred, the noise was not generated in the first to fourth experiments, but the noise was generated only in the fifth experiment. As the ground wires A and C, flexible electric wires which do not adversely affect the backlash absorption of the solenoid mount 51 were used. According to the above experiment, in a state where the plunger 77 and the yokes 71 to 73 are connected by the return spring 82, there is no practical problem if the yokes 71 to 73 are connected directly or at least through a 10 kΩ resistor. It could be confirmed. Therefore, as in the first embodiment, the yoke of the electromagnetic solenoid 70 is formed by making the solenoid mount 51 made of a conductive synthetic resin and connecting a ground wire (not shown) made of a flexible electric wire to the solenoid mount 51. The sliders 71 to 73 and the roll slider 56 are connected to the ground wires corresponding to the ground wires A and C via the solenoid mount 51 having a predetermined resistance value determined by the conductive synthetic resin, so that the static electricity can be appropriately removed. .
[0015]
2 and 3 show a second embodiment. FIG. 2 shows that the ball launching mechanism 14 is mounted on the front plate 10 and at least one of the ground wires A and C is connected to the rear plate 4 and the ground wire B is connected. FIG. 3 shows a gaming machine frame 1 of a pachinko machine connected to a ball launching rail 15 and provided with a frame-side contact body 40 for connecting the ball launching rail 15 and the frame support 21 to a front plate 10; 3 shows a cross section of a connection structure between the launch rail 15 and the frame support 21.
[0016]
The gaming machine frame 1 will be described with reference to FIG. The game machine frame 1 has a front frame 3 and a front makeup body 20 attached to a frame-shaped outer frame 2 by hinges so as to be openable in the front lateral direction. The front frame 3 has a frame shape, and forms a game board storage portion in cooperation with a metal rear plate 4 fixed on the back side as a reinforcing member of the front frame 3. The rear plate 4 is provided with board lock mechanisms 6; 7; 8 at the left and right edges and an upper edge around the central opening 5, a front plate 10 at a lower edge, and further to the upper left side of the front plate 10. A relief hole 9 is provided at a portion where the hole is located. The front plate 10 includes a speaker unit 11, a hooking mechanism 12, a foul ball gutter 13, a ball firing mechanism 14, a ball firing rail 15, an out ball relay port 16, and a frame-side contact body 40.
[0017]
As shown in FIG. 3, the frame-side contact body 40 is in the form of a band made of metal such as stainless steel, and one end of the frame-side contact body 40 is formed of a stainless steel ball launch rail 15 so as to secure the ball path. An elastic body having conductivity such as conductive rubber is connected to the front side and fixed to the ball launching rail 15 with a metal set screw 41, and the other end of the frame support 21 is disposed on the front side of the front plate 10. 42. The elastic body 42 is compressed and arranged between the frame support 21 and the frame-side contact body 40 and is elastically connected to the frame support 21 and the frame-side contact body 40 by restoring elasticity. Press on Frame 3. The front frame 3 has a locking device 17 on a right edge thereof, a lower plate device 18 on a lower edge portion than the upper plate device 24, and a handle on the right side of the lower plate device 18 for operating the ball firing strength of the ball firing mechanism 14. A grip 19 is provided.
[0018]
The front decorative body 20 forms a front design covering the front frame 3, and includes a frame support 21, a peripheral decoration 22, a panel frame 23, and an upper plate device 24. The frame support 21 is made of metal, and is fixed to the inner peripheral edge of the front frame 3 with a plurality of set screws such as wood screws (not shown). At least one set screw 25 made of metal among the set screws for fixing the frame support 21 to the front frame 3 is connected to and fastened to the rear plate 4 through the front frame 3. The peripheral decoration 22 is fixed to the front frame 3 so as to cover the left and right edges and the upper edge of the front frame 3 and the frame support 21. The panel frame 23 has a frame shape attached to the frame support 21 inside the peripheral decoration 22 with a hinge (not shown) so as to be able to open in the front lateral direction, and has a transparent property to cover the inner opening of the panel frame 23. A panel 26 made of synthetic resin, glass, or the like is provided.
[0019]
The upper plate device 24 has an upwardly open upper plate ball storage chamber 29 protruding forward and disposed below the panel frame 23, and includes a box plate 27 serving as an upper plate mounting base and a upper plate front design. And a dish portion 28. The box plate 27 is made of metal which is attached to the frame support 21 with a metal hinge 30 so as to be openable at the front side in a state of being electrically conductive. The upper plate lock mechanism 33 is provided. An upper ball inflow gutter 31 discharges a ball dispensed from a ball dispensing mechanism (not shown) provided on the back side of the front frame 3 to an upper ball storage chamber 29, and a ball outlet 32 is provided from the upper ball storage chamber 29. The ball is led out to the ball launching rail 15 of the ball launching mechanism 14.
[0020]
On the back side of the rear plate 4, there is provided a power supply device 90 for converting an alternating current into a direct current used in a game machine. The power supply device 90 is fixed by contacting a metal case having a built-in AC / DC converter 91, a surge absorber 92 such as an arrestor and a varistor, and other electric components with a set screw 93 made of metal. A ground wire 95 is wired to the case of the power supply device 90 with a set screw 96 made of metal. The set screw 96 also serves as a screw for fixing the ground terminal of a circuit board such as a printed circuit board on which the AC / DC converter 91 and the surge absorber 92 and other electric components are mounted to the case. The power supply plug 97 of the power supply device 90 is connected to an island-side power supply 98 that outputs 24 VAC, such as an island transformer.
[0021]
Next, when a clerk turns on the power switch of the power supply device 90 in a state where a game board (not shown) is mounted inside the gaming machine frame 1, an AC power supply of 24 VAC is supplied from the island side power supply 98 to the power supply device 90. A constant voltage power supply such as DC 24 volts, DC 12 volts and DC 5 volts, which is supplied and converted by the AC / DC converter 91 of the power supply device 90 from the island power supply 98, is connected to the back side of the front frame 3 or the game board by wiring. The main control device, special symbol control device, indicator light control device, sound control device, ball payout control device, and ball discharge control device, which are provided on the backside of the device, output to a plurality of control devices that are separately configured according to functions. Then, when the player puts a ball into the upper plate device 24 and operates the handle grip 19, the ball firing mechanism 14 fires the ball supplied from the upper plate device 24. The shot hits from the ball shooting rail 15 and jumps out to the game board side.
[0022]
According to the structure of the second embodiment, by connecting at least one of the ground wires A and C of the ball firing mechanism 14 to the rear plate 4, the static electricity generated in the ball firing mechanism 14 itself can be appropriately applied to the rear plate 4. You can escape. Also, the ground wire B is connected to the sphere launching rail 15 and the conductive sphere launching rail 15 and the conductive frame support are connected by the conductive frame side contact body 40, the conductive set screw 41 and the conductive elastic body 42. By connecting the frame support 21 to the conductive rear plate 4 with the conductive set screw 25 by connecting the frame support 21 and the frame support 21, the ball is fired by collision with the hammer 79 of the ball firing mechanism 14 or friction with the ball firing rail. The static electricity charged on the sphere and the static electricity charged on the guide rail 53 by the friction with the solenoid mount 51 also cause the set screw 41, the frame-side contact body 40, the elastic body 42, the frame support 21, and the set screw 25 from the ball firing mechanism 14. Can be properly released to the rear plate 4 via the order.
[0023]
The static electricity charged on the rear plate 4 is gradually and naturally discharged from the rear plate 4 to the atmosphere. Sudden air discharge occurs and electromagnetic waves are generated. When the amount of static electricity charged on the rear plate 4 for suppressing the generation of the electromagnetic wave exceeds a predetermined value, the static electricity is released from the rear plate 4 to the island power supply 98 via the surge absorber 92 and the power plug 97. .
[0024]
In the structure of the second embodiment, the frame support 21, the panel frame 23, and the frame-side contact body 40 are covered with a skin layer made of an electrically insulating material such as a synthetic resin or a paint, so that a human body such as a player or a clerk in a game state is provided. Does not cause unpleasant static discharge. In this case, it is necessary that the contact portion between the frame-side contact body 40 and the set screw 41 retains electrical conductivity.
[0025]
4 and 5 show a third embodiment. FIG. 4 shows a front view of a connection structure between a ball launching rail 15 and a hooking mechanism 12, and FIG. 5 shows a cross section around a frame-side contact body 43. In FIG. 4, the frame-side contact body 43 is in the form of a metal band connecting the ball launching rail 15 and the hooking mechanism 12, and one end of the frame-side contacting body 43 secures the ball path of the stainless steel ball launching rail 15. Is connected to the front side of the ball launching rail 15 and is fixed to the ball launching rail 15 with a metal set screw 44, and the other end is connected to the latching mechanism 12 by a fixing portion 45.
[0026]
In FIG. 5, the fixing portion 45 inserts a portion protruding from the front plate 10 into a through hole formed in the fulcrum base 116 of the locking mechanism 12 and a through hole formed in the frame side contact body 43, and then contacts the frame side. When the fixing portion 45 protruding forward from the body 43 is crushed while being melted by heat, the frame-side contact body 43 is connected to and fixed to the fulcrum base 116. The fixing portion 45 may be replaced with a metal set screw. In the locking mechanism 12, the operation lever 118 is rotatably connected to the fulcrum base 116 by inserting a lever shaft 117 formed in the fulcrum base 116 into a bearing hole 119 formed in the operation lever 118. The operation lever 118 is provided with an annular hook 120 rotatably. The fulcrum base 116, the lever shaft 117, the operation lever 118, and the latch 120 that constitute the latch mechanism 12 are made of metal.
[0027]
Then, the gaming board 104 corresponding to the gaming board (not shown) is stored inside the gaming machine frame 1, and the operator stops the operation lever 118 at the position indicated by the phantom line in FIG. 5 is moved from the imaginary line position to the one-dot chain line position, and the operating lever 118 is moved from the imaginary line position to the solid line position in FIG. Then, the latch 120 is moved downward by the rotational movement of the operation lever 118 about the lever shaft 117 as the rotation center. In the process of moving the hook 120 downward, the free end of the hook 120 engages the hook 103 of the outer band fitting 102 from above and below, and then the hook 103 is moved toward the front plate 10. Lower. The game board 104 and the front plate 10 are fixed to each other by the lowering of the hook mechanism 12 by the hook 120.
[0028]
Also, the outer band 101 has a conductive band nail 114, a conductive outer band fitting 102, a conductive locking mechanism 12, a conductive frame side contact body 43, the conductive ball launching rail 15 of FIG. 4, the conductive frame-side contact body 40, the conductive elastic body 42 of FIG. 3, the conductive frame support 21 of FIG. 4, and the conductive set screw 25 of FIG. Connected to the outer band 101, the static electricity charged to the ball on the outer band 101 is also reduced from the outer band 101 to the band nail 114, the outer band fitting 102, the hooking mechanism 12, the frame side contact body 43, the ball launching rail 15, and the frame side contact body. 40, the elastic body 42, the frame support 21 and the set screw 25 can be properly released to the rear plate 4 in order.
[0029]
FIG. 6 shows a front view of a connection structure between the ball launching rail 15 and the locking mechanism 12 according to the fourth embodiment. In the fourth embodiment, a frame-side contact body 46 is provided on the side of the hook mechanism 12 instead of the frame-side contact body 40 of FIG. The static electricity charged to the rear plate 4 is appropriately released to the rear plate 4. The frame-side contact body 46 is connected to the frame-side contact body 43 by overlapping one end thereof on the front side of the frame-side contact body 43 and crushing the fixing portion 45, and the other end is connected to the elastic body 42 shown in FIG. It is connected to the frame support 21 via a corresponding elastic member (not shown).
[0030]
FIGS. 7 to 9 show a fifth embodiment. FIG. 7 shows a pachinko machine provided with a metal coil spring 131 for connecting the ground wire A of the ball firing mechanism 14 mounted on the front plate 10 to the rear plate 4. 8 shows a coil spring 131, and FIG. 9 shows a connection structure between the coil spring 131, the box plate 27, and the yokes 71 to 73 of the electromagnetic solenoid 70. As shown in FIG.
[0031]
7, a mounting portion 132 extending from one end of the coil spring 131 is mounted on the back surface of the box plate 27 with a metal set screw 133. In FIG. 8, the coil spring 131 has a drum shape in which the coil diameter becomes thinner from one end toward the center and gradually becomes larger from the minimum diameter toward the other end. 9, when the box plate 27 is closed and locked to the front frame 3 in FIG. 7, the other end of the coil spring 131 contacts the yokes 71 to 73, and the coil spring 131 is connected to the box plate 27 and the yokes 71 to 73. 73 and compressed.
[0032]
Therefore, as shown in FIGS. 7 to 9, even when the ball firing mechanism 14 performs the ball firing operation, one end of the coil spring 131 is formed on the box plate 27 because the coil spring 131 is formed in a drum shape. The other end of the coil spring 131 moves in accordance with the movement of the electromagnetic solenoid 70 while being fixedly in contact with the yokes 71 to 73, and the middle part of the coil spring 131 moves in accordance with the movement of the electromagnetic solenoid 70. The swinging movement does not adversely affect the ball firing operation of the electromagnetic solenoid 70, does not cause the connection failure between the coil spring 131 and the box plate 27, and causes the connection failure between the coil spring 131 and the yokes 71 to 73. Without causing the static electricity generated in the ball firing mechanism 14 itself, the coil spring 131, the box plate 27, the hinge 30, the frame It can be appropriately released to the rear plate 4 by way of the bearing member 21 and screw 25.
[0033]
FIG. 10 shows a structure of the ball launching mechanism 14 according to the sixth embodiment provided with a metal strip-shaped connecting plate 141 such as stainless steel for connecting the ground wire B to the rear plate 4. In FIG. 10, a connection plate 141 connects the guide rail 53 of the ball firing mechanism 14 and the ball firing rail 15. One end is connected to the tip of the guide rail 53 and the guide rail 53 is fixed to the mechanism base 50. The other end is connected to the front side of the ball launching rail 15 so as to secure the ball path of the ball launching rail 15, and the ball launching rail is fixed by a metal set screw 143. Fix to 15. Accordingly, static electricity generated in the contact portion between the guide rail 53 and the bush 58 and the contact portion between the receiving portion 59 and the bush 58 by the ball firing operation of the ball firing mechanism 14 is transferred from the ball firing rail 15 to the connection plate 40 and the elastic member 42. 7 can be properly released to the rear plate 4 via the frame support 21 and the set screw 25 shown in FIG.
[0034]
In each embodiment, the conductive synthetic resin includes, for example, a material in which ultrafine fibers of stainless steel are dispersed in a thermoplastic synthetic resin, such as Rio Conduct® EMI manufactured by Toyo Ink Co., Ltd .; ) A synthetic resin such as Neocon manufactured by the Company, a material obtained by kneading a conductive polymer such as polyacetylene / polypyrrole / polyaniline, or a metal such as silver / copper / nickel / aluminum with a conductive material such as carbon black. A material in which carbon fibers are filled in a polycarbonate resin, such as Iupilon (registered trademark) CF, a material in which carbon fibers are dispersed in a thermoplastic resin, such as Torayca (registered trademark) pellets, manufactured by Toray Industries, Inc. There is a material obtained by mixing a conductive filler such as carbon fiber with a styrene resin, such as Denka Emicon manufactured by Denki Kagaku Kogyo KK.
[0035]
In FIG. 1, components such as a bush 58, a receiving portion 59, a cushioning member 78, a hammer 79, a spring sheet 81, an impact absorbing member 83, a liner 85, and a liner 87 may be formed of a conductive synthetic resin. The conductive synthetic resin forming the spring sheet 81 is best formed from POM (polyacetal) from the viewpoint of static electricity removal.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing a ball firing mechanism according to a first embodiment.
FIG. 2 is a schematic view showing a gaming machine frame according to a second embodiment.
FIG. 3 is a sectional view showing a connection structure according to a second embodiment.
FIG. 4 is a front view showing a connection structure according to a third embodiment.
FIG. 5 is a sectional view showing a connection structure according to a third embodiment.
FIG. 6 is a front view showing a connection structure according to a fourth embodiment.
FIG. 7 is a schematic view showing a gaming machine frame according to a fifth embodiment.
FIG. 8 is a perspective view showing a coil spring according to a fifth embodiment.
FIG. 9 is a plan view showing a connection structure according to a fifth embodiment.
FIG. 10 is a perspective view showing a connection structure according to a sixth embodiment.
[Explanation of symbols]
A Ground wire B Ground wire C Ground wire 1 Gaming machine frame 14 Ball launching mechanism

Claims (1)

A plunger of an electromagnetic solenoid is movably inserted into an inner space penetrating in the front-rear direction formed by a yoke in which an excitation coil of an electromagnetic solenoid is mounted, and a rear end of the plunger protruding rearward from the inner space of the yoke is provided. A return spring is mounted, a front end of the return spring is received by a rear end of the yoke, a rear end of the return spring is received by a spring stop coupled to a rear end of the plunger, and a hammer support rod is coaxial with the front end of the plunger. A hammer that hits a ball, which is a game medium, is attached to the tip of a hammer support rod projecting forward from the interior space of the yoke, and a plunger and a hammer support rod between the hammer and the front end of the yoke are attached to the tip of the hammer support rod. The hammer support rod is moved backward by the spring force of the return spring and received by the front end of the yoke to determine the starting position of the hammer. Cushioning member be fixed for by an interrupting power supply to the exciting coil, hammer in ball firing mechanism of the pachinko machine to perform the ball firing operations repeating the retraction and linearly advances, the rear end of the yoke The return spring, which is received by both the spring stopper and the spring stopper connected to the rear end of the plunger, is formed of a metal coil spring, and the spring stopper is formed of metal, so that the plunger and the yoke are electrically conductive by the return spring. A ball launching mechanism for a pachinko machine, characterized in that a ground wire is connected to the yoke while being connected with a characteristic.

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