JPH0242313Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is applicable to, for example, a variable batted ball winning device that changes the acceptance state of batted balls by driving an electromagnetic solenoid, an indicator incorporating a light emitting source such as a lamp or a light emitting diode, etc. The present invention relates to a pachinko machine equipped with a circuit board having electronic components for electrically controlling an electrical gaming device.

(Prior art) In order to increase the interest of pachinko games, electric game devices such as variable batted ball winning devices and lamp indicators are installed on the front side of the game board, and these electric game devices are electrically controlled. Pachinko machines with the above-mentioned features are disclosed in, for example, Japanese Utility Model Application Publication No. 149190/1982 and Japanese Patent Application No. 24482/1983.

<Problems to be solved by the invention> Since the conventional pachinko machines described above have made extensive use of relay circuits and mechanical timer mechanisms, electrical game devices such as variable batted ball winning devices and lamp indicators have been used. Since the electrically controlled control device is relatively unaffected by external noise, static electricity, etc., and has few parts that generate heat, a less sophisticated case is sufficient for the control device. However, in the case of recent pachinko machines, control devices that electrically control the above-mentioned electrical game equipment have been replaced by control devices in which multiple electronic components such as transistors and integrated circuits are arranged on a circuit board. , manual ball launchers have been replaced by electric ball launchers. On the other hand, the environment surrounding pachinko machines has changed considerably compared to the past, as even pachinko machine array equipment in which a large number of pachinko machines are installed are equipped with large ball circulation devices and ball polishing devices inside. Therefore, the electronic components on the circuit board installed in the pachinko machine are affected by electrical noise generated from the above-mentioned electrical drive source or by electrical charges on the surfaces of the many balls polished by the ball polishing device, and as they flow down. Not only is it susceptible to the negative effects of static electricity accumulated on the back side of the mechanism panel, but it is also susceptible to the heat generated by the electronic components themselves due to long-term operation.For example, the electronic components may malfunction, or static electricity may This has caused damage to electronic components due to heat generation. As a result, electrical game equipment such as manual ball winning devices and lamp indicators may not operate normally or may stop operating, causing inconvenience to players and creating a sense of distrust. It was becoming.

Additionally, when pachinko parlors open a new store, they often replace the pachinko machines with new game boards and make adjustments to each pachinko machine after the store closes the day before the new store opens. The electrical control device that controls the electrical gaming equipment installed in the game board can be replaced in an extremely short time, and the electrical control device and back mechanism panel that are replaced depending on the various game boards are compatible. It was wanted.

In view of both the changes in the environment surrounding pachinko machines and the fact that circuit boards are equipped with electronic components that are susceptible to electrical noise, static electricity, and heat, the present invention was developed to suppress the negative effects of electrical noise and static electricity on electronic components.
In particular, a pachinko machine that can maintain good operation of the electrical game equipment installed on the game board by reducing the negative effects of heat generated by the electronic components themselves, and also allows the electrical control device to be easily attached to and removed from the back mechanism panel. The purpose is to provide.

<Means for Solving the Problems> The present invention was proposed in view of the above, and is arranged on the back side of the game board, and the balls drawn out from the prize ball tank installed at the top by the ball ejection gutter are flowed down to a predetermined number. a back mechanism board mainly made of synthetic resin material and equipped with a prize ball ejecting device for discharging the game board; an electric game device attached to the front side of the game board; and an electronic component for electrically controlling the electric game device. A pachinko machine comprising a circuit board and a circuit case that houses the circuit board, the circuit board having a control area for attaching electronic components for controlling the electrical gaming equipment, and a control area for attaching electronic components for controlling the electrical gaming equipment; and a connection area for attaching a connection pin for removably connecting the connector attached to the end of the connection line, and the circuit case has an opening large enough to accommodate at least the control area of the circuit board therein. It is constructed by combining a box-shaped first shielding member in which a part is formed and a lid-shaped second shielding member capable of closing an opening of the first shielding member, and a first locking part is formed on the outer surface. The back surface of the back mechanism panel is provided with a protrusion that forms a first space between the back surface and the second shielding member, and a second locking portion that is detachable from the first locking portion. The circuit case is provided with a second space between the second shielding member and the circuit board, and a second space between the first shielding member and the circuit board, the volume of which is larger than the second space. The circuit board is arranged with three spaces formed respectively, and the first locking part is removably locked to the second locking part, so that the circuit case can be attached to and detached from the back surface of the back mechanism panel. By forming a gap between the edge of the circuit board and the inner surface of the first shielding member, the second space and the third space of the circuit case in this installed state are connected to the circuit board. The circuit case is communicated with the inside of the case, and also communicated with the outside of the circuit case through a ventilation hole formed in the first shielding member, so that the heat generated by the electronic components is transferred to convection in the second and third spaces in the circuit case. The electronic component is characterized in that heat is radiated through the air vents and radiated to the outside air through the ventilation holes, and static electricity generated on the surface of the back mechanism panel is prevented from affecting the electronic components by forming the first space. It is something to do.

<Function> Since the pachinko machine according to the present invention is constructed as described above, while reliably suppressing the negative effects of electrical noise and static electricity on electronic components, the heat generated by the electronic components of the circuit board can be effectively dissipated from the circuit. It is possible to efficiently dissipate the radiation outside the case, and to attach the circuit case containing the circuit board in a detachable manner to the back mechanism panel.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

On the front side of the pachinko machine 1, as shown in FIG.
A gaming section 9 surrounded by guide rails 8 is formed on the surface of the gaming board 7, which is mounted so as to cover the window section of the board. In addition to the mouth 10, there is also a central batted ball winning device 11 and a variable batted ball winning device 1, which are electrical game devices.
2nd prize is provided.

According to the illustrated embodiment, the central batted ball winning device 11 allows the player to play a special game based on a specific winning mode of the batted ball, for example, winning in the specific winning hole 10, and as shown in FIGS. 8 to 10, As shown, it has a lamp indicator 13 and a digital indicator 14 inside, and movable receiving pieces 15, 15 on the outer periphery, respectively.
When the batted ball enters the special winning hole 10, the lamp 13' of the lamp display 13 blinks at high speed according to the electric signal from the electric control device, and the digital display 14 displays numbers from "0" to "9". High-speed display for one address. Then, when the player operates the stop switch 16 on the front of the pachinko machine, the high-speed flashing of the lamp display 13 and the high-speed display of the digital display 14 are stopped, and in this stopped state, both the displays 13,
When the prize mode is formed on the display 14, the electromagnetic solenoid 17 is excited by an electric signal from the electric control device to tilt the movable receiving piece 15, converting it into a state where it is easy to accept the batted ball into the central batted ball winning device 11. It is.

On the back side of the pachinko machine 1, that is, on the back side of the game board 7, as shown in FIG.
A base plate 19 of the central batted ball winning device 11 is provided in the gap between the back mechanism board 18 and the game board 7, and a winning ball collection gutter 20 is formed. A detector 21 that electrically detects a batted ball that enters the area and sends an electric signal to an electric control device, and an electromagnetic solenoid 17 that tilts the movable receiving piece 15 based on an electric signal from the electric control device.
is provided.

In addition, a prize ball tank 22 is provided on the back of the back mechanism panel 18.
A ball deriving gutter 23 for deriving a ball from the sphere, the ball deriving gutter 23
A prize ball discharging device 24 that allows a certain number of balls to flow down, a prize ball discharging gutter 25 that guides the balls discharged from the prize ball discharging device 24 to the ball supply tray 3 or the receiving tray 4 on the front of the pachinko machine 1, etc. It is provided.

The ball outlet gutter 23 connects the inlet 23a at the upper end of the slope to the ball outlet 22' of the prize ball tank 22, changes the direction of flow at a bent part 23b formed in the middle of the ball outlet gutter 23, and connects the inlet 23a at the upper end of the slope to the ball outlet 22' of the prize ball tank 22. 23c is connected to the prize ball ejecting device 24.

Further, the bent portion 23b is provided with a ball extraction mechanism 26, and is connected to an upper opening 27a of a ball extraction gutter 27 disposed on the right side of the back mechanism panel 18 in the vertical direction, so that the ball extraction mechanism 26 can be operated. The bent portion 23b
A ball extraction port (not shown) provided in the figure is opened, and the balls in the prize ball tank 22 are extracted from the ball extraction port through the ball extraction gutter 27 to the outside of the pachinko machine 1.

In the illustrated embodiment, the prize ball discharging device 24 has a tilting gutter 28 that accommodates a certain number of balls pivoted to the back mechanism panel 18, and the inlet 28a of the tilting gutter 28 is connected to the ball ejecting gutter 23. To exit 23c, exit 28
b to the upper openings of the prize ball discharge gutter 25, and in order to avoid the rear part of the central batted ball winning device 11 that protrudes from the back side of the pachinko machine 1, the prize ball discharge device 24 is placed on either the left or right side of the back mechanism panel 18. It is provided closer to the side (left side in the illustrated embodiment).

The prize ball ejection gutter 25 consists of a vertical portion 25a located on either the left or right side (the left side in the illustrated embodiment) of the back mechanism panel 18, and an inclined portion 25b that slopes gently downward from the lower end of the vertical portion 25a. It is a substantially L-shaped gutter, and the upper opening of the vertical part 25a is the prize ball ejecting device 2.
4, and the lower end of the inclined portion 25b passes through the back mechanism board 18 and the game board 7 and is connected to the ball supply tray 3 on the front surface of the pachinko machine 1. Also, the inclined part 2
A diversion gutter 30 is extended from the switching valve 29 provided in the middle of the pachinko machine 5b, and the lower opening of the diversion gutter 30 is connected to the pachinko machine
Connect to the saucer 4 on the front.

The back surface of the prize ball discharge gutter 25 is, for example, a flat surface substantially parallel to the surface of the back mechanism panel 18, and the electric control device 31 is attached to a suitable position on the back surface of the prize ball discharge gutter 25, which is this flat surface.

The electrical control device 31, as shown in FIG.
A control area 33a provided on a circuit board 33 by effectively combining electronic components 32 such as ICs and LSIs, and connection pins 34 electrically connected to predetermined electronic components 32.
A connection area 33b is formed which is concentrated on one side of the circuit board 33, and this circuit board 33 is housed in a circuit case 35, and the electrical signals from each detector can be stored or It performs arithmetic processing based on a pre-stored program and transmits electrical signals to control various electrical gaming devices such as the central batted ball winning device 11.

The circuit case 35 described above includes a first shielding member 35a and a second shielding member 35b made of a metal with good thermal conductivity such as aluminum, and is appropriately sized to accommodate at least the control area 33a of the circuit case 35. a first shielding member 35a shaped like a casing frame with an opening formed therein; and the first shielding member 3
A lid-shaped second shielding member 35 that can close the opening of 5a.
It is constructed by combining b.

A large number of ventilation holes 3 are provided on the upper surface of the first shielding member 35a.
6... and a first locking member 37 is provided on the outer surface (in the illustrated embodiment, the left side and right side),
Fixing pieces 39 having female threaded holes 38 are formed inside the four corners of the opening.

Further, a fixing piece 41 having a hole 40 at a position corresponding to the fixing piece 39 of the first shielding member 35a is bent into an L-shape on the second shielding member 35b.

In order to house the circuit board 33 having the electronic components 32 in the circuit case 35, for example, the electronic components 32...
The control area 33a formed by... is faced to the opening of the first shielding member 35a, and the connection area 33b formed by the connecting pins 34... is located outside the first shielding member 35a (lower in FIG. 3). In this state, the circuit board 33 is held between the first shielding member 35a and the second shielding member 35b, the screw 42 is inserted through the hole 40 of the fixing piece 41, and the screw 42 is inserted into the circuit board 33.
The circuit board 33 is inserted into the through hole 43 of the fixing piece 39 and then firmly fastened to the female screw hole 38 of the fixing piece 39.
The circuit case 35 can be assembled with the control area 33a housed in the metal circuit case 35 and the connection area 33b exposed to the outside.

In addition, the first shielding member 35a has an appropriate depth so that the electronic component 32 provided on the circuit board 33 does not come into contact with the inner surface of the first shielding member 35a, and the first shielding member 35a has an appropriate depth, and the edge of the circuit board 33 inside the circuit case and the first shielding member 35a have an appropriate depth. The opening of the first shielding member 35a is appropriately larger than the outer periphery of the circuit board 33 so that a gap 33c is formed between the first shielding member 35a and the inner surface of the first shielding member 35a.
A shielding member 35a is formed, and a second shielding member is formed in a required shape to appropriately close the opening of the first shielding member.
A shielding member 35b is formed.

The first locking member 37, which is a first locking portion provided on the outer surface of the circuit case 35, is, for example, a first shielding member 35a.
A large diameter head 4 is attached to the mounting piece 45 protruding from the outer surface of the
An operating knob 47 having a vertical section 6 is provided so as to be movable back and forth, and a leg 4 having a dogleg shape in vertical section is provided on the outside of the head 46.
8 and 48 are provided facing each other.

Further, a second locking member 37 that can be freely engaged and detached from the first locking member 37 is provided.
The second locking member 44, which is a locking portion, has bosses 50 protruding from a mounting base 44a, which is a plate material of an appropriate thickness and is fixed to a predetermined position on the back surface of the ball discharge gutter 25 with screws or the like. , the first locking member 3
A locking hole 49 is provided in an appropriate number of bosses 50 arranged at predetermined positions corresponding to 7, and the locking hole 49 has an internal depth longer than the length of the leg 48, and the internal space is larger in diameter than the entrance. It's like this.

Such a first locking member 37 and a second locking member 44
The electric control device 31 is controlled by the ball discharge gutter 25.
For example, as shown in FIG.
With the locking member 37 facing each of the second locking members 44 and the operating knob 47 pulled (indicated by the two-dot chain line in FIG. 6), the tip of the first locking member 37, that is, the tip of the leg 48 is inserted into the boss 50 through the locking hole 49, and then the operation knob 47 is pushed toward the back side of the prize ball discharge gutter 25 as shown by the solid line in FIG.

As a result, the large-diameter head 46 that has entered the space between the tips of the legs 48 spreads the legs 48, 48 laterally, and the base ends of the legs 48, 48 expanded inside the boss 50 engage with the locking hole 49. Since the first locking member 37 and the second locking member 44 are locked, the electric control device 31 can be detachably attached to the back surface of the prize ball discharge gutter 25. .

To remove the electrical control device 31, pull the operation knob 47 as shown by the chain line in FIG. When the operating knob 47 is pulled, the head 46 is removed from the distance between the tips of the legs 48, 48, so the distance between the legs 48, 48 is elastically reduced, and the legs 48, 48 can be removed from the locking hole 49.
Therefore, the electrical control device 31 is connected to the pachinko machine 1.
It can be easily removed from the

In order to electrically connect the electrical control device 31 attached to the pachinko machine 1 and various electrical gaming devices such as the central ball winning device 11, each electrically operated device, specifically the electromagnetic solenoid 17, lamp 1
3', connectors 52 are provided at the ends of the connecting wires 51 extending from parts that directly input and output electrical signals such as the detector 21, and these connectors 52 are connected to predetermined connecting pins 34 of the electrical control device 31. Fit into... In this embodiment, the connection area 33b is exposed from the circuit case 35, but the entire circuit board 33 is completely housed within the circuit case 35, and each It can also be configured so that the connection lines 51... are pulled out.

In addition, power is supplied to the electrical control device 31 by connecting a connector 52' provided at the tip of a power cord 53 to a terminal base 54 disposed above the back mechanism panel 18 to which an external power source (not shown) is supplied. This is done by connecting.

As described above, when the first locking member 37 is locked to the second locking member 44 and the electric control device 31 is attached to the prize ball ejection gutter 25 of the back mechanism panel 18, from the back side of the prize ball ejection gutter 25. Since a boss 50, which is a protrusion that protrudes appropriately, is provided on the mounting base 44a, a first space 55 is formed between the back surface of the prize ball discharge gutter 25 and the second shielding member 35b of the circuit case 33. .

Further, in the circuit case 35, a second
A second space 56 is provided between the inner surface of the shielding member 35b and the circuit board 33, and a third space 57 having a larger volume than the second space 56 is provided between the first shielding member 35a and the circuit board 33. are formed, respectively, and both the spaces 56 and 57 communicate with the outside air through the ventilation hole 36, and are connected to the gap 33c formed between the inner surface of the first shielding member 35a and the edge of the circuit board 33. Therefore, the second space 56 and the third space 57 are communicated with each other.

In the circuit case 35 configured as described above, the air inside the circuit case 35 warmed by the heat generated by the electronic components 32 when the electrical control device 31 is operated is transferred to the third space by convection. Part 5
7 and is radiated to the outside through the vent hole 36. At the same time, relatively low-temperature outside air approximately equal to the volume of the discharged air flows into the circuit case through the vent hole 36.

The outside air that has flowed into the circuit case through the ventilation hole 36 descends through the second space 56 formed between the back surface of the circuit board 33 and the inner surface of the second shielding member 35b, which releases relatively little heat due to convection. 1st
It flows into the third space 57 through the gap 33c formed between the inner surface of the shielding member 35a and the edge of the circuit board 33, is heated by the electronic component 32, and is heated by the electronic component 32.
It ascends through the space 57 and is discharged to the outside through the ventilation hole 36.

That is, the second space 56 inside the circuit case 35
A natural convection of air occurs between the space 57 and the third space 57 due to the temperature difference, and this natural convection causes the electronic component 32 to
As well as promoting heat dissipation, the temperature of the circuit case 35 has increased.
By discharging the air inside to the outside air through the ventilation hole 36, the heat generated by the electronic components is dissipated to the outside.

Furthermore, when the temperature inside the circuit case 35 increases appropriately due to heat radiation from the electronic components 32 over a long period of time, the amount of heat of the heated air is transferred to the first and second shielding members 35a, which have good thermal conductivity, It is also transmitted to 35b and dissipated into the outside air.

Therefore, since the first space 55 is formed between the back surface of the prize ball discharge gutter 25 and the second shielding member 35b, the air in the second space 57 is transmitted to the second shielding member 35b. The heat is dissipated to the air in the first space, the heated air in the first space 55 rises, and outside air approximately equal to the volume of the risen air flows into the first space 55 from the surroundings. First, the first
Air flow occurs in the space 55.

That is, the heat transmitted from the air in the second space 56 to the second shielding member 35b by the air flow generated in the first space 55 is efficiently dissipated, and the heat emitted from the electronic component 32 is dissipated into the second shielding member 35b. This prevents heat from being intensively stored in the second space 56.

Therefore, the temperature of the second space 56 does not rise above the temperature of the third space 57, so the natural convection that occurs between the second space 56 and the third space 57 does not disappear. This prevents a decrease in the amount of heat radiated from the circuit case 35 to the outside, and minimizes malfunctions and failures of the electronic components 32 due to temperature rise.

In addition, since the first space 55 is formed, the static electricity charged by the ball is accumulated on the back mechanism panel 18 (in this embodiment, the prize ball discharge gutter) side, and this accumulated static electricity is transferred to the electronic components. Adverse effects (malfunction of electronic components,
(destruction of electronic components).

Further, since the third space 57 has a larger volume than the second space 56, the electrical control device 31 is constructed with the electronic component mounting side of the circuit board 33 facing the third space 57. In this case, the amount of air inside the circuit case is intentionally increased to absorb the heat emitted from the electronic components 32, which have a relatively high heat dissipation amount,
This increases the amount of heat dissipated from the electronic component 32 to the air inside the circuit case, thereby more effectively preventing the temperature of the electronic component 32 from rising.

Further, since the circuit board 33 is formed in the control area 33a and the connection area 33b, the connection area with a relatively small amount of heat radiation is connected to the circuit case 33 as in this embodiment.
If the electrical control device 31 is configured such that only the control region 33a is exposed outside the circuit case 35 and the control region 33a is housed inside the circuit case 35, the storage volume of the circuit case 35 can be reduced, and the connection region 33b Even when configured to be housed in the circuit case 35, the connecting wires 51 extending from the connector 52 that fit into the connecting pins 34 can be pulled out all at once, so that the connecting wires 51 can be avoided. can be prevented and maintenance can be made easier.

Since the first space 55 is formed by a protrusion (in this embodiment, the boss 50 of the second locking member 44) provided on the back surface of the back mechanism panel 18 of the pachinko machine 1, When replacing a new pachinko machine, the electrical control device 31 (replaced along with the circuit case), which is replaced as needed to match the game board 7 on the front of the pachinko machine 1, is designed to be more flexible than ever before by keeping the shape of the circuit case 35 constant. It can be installed while maintaining compatibility with the back mechanism panel 18.

Note that the first locking member 37 provided on the outer surface of the circuit case 35 and the second locking member 37 provided on the back surface of the prize ball discharge gutter 25
The locking members 44 may have any structure as long as they can be freely engaged and detached from each other, and the location of the second locking members 44 is not limited to the rear surface of the prize ball discharge gutter 25.

In addition, in this embodiment, the protrusion for forming the first space 55 between the back surface of the prize ball discharge gutter 25 and the second shielding member 35b of the circuit case 33 is connected to the boss 50 of the second locking member 44. However, the protrusion for forming the first space and the second locking part do not necessarily have to be provided as the same member, and the protrusion may be formed separately.

Furthermore, in the present embodiment described above, a large number of ventilation holes 36 are provided only on the upper surface of the first shielding member 35a, but the opening positions of the ventilation holes 36 are not limited to the upper surface. If the circuit case 35 is opened at the side surface, bottom surface, etc., or if an appropriate gap is created at the joint between the first shielding member 35a and the second shielding member 35b, the circuit case 35 can be opened from other than the ventilation hole 36 on the top surface.
The air flowing in and the second and third spaces 56, 5
Due to the interaction of the convection currents within the circuit case 7, a turbulent flow of air is generated within the circuit case 35, and this turbulence can further improve the heat dissipation of the electronic component 32.

Note that by forming both the first shielding member 35a and the second shielding member 35b with conductive metal plates or the like, static electricity, electrical noise, etc. generated on the back mechanism panel 18 can be efficiently suppressed, and the electrical noise can be effectively suppressed. This allows the circuit case to have a high shielding effect.

The present invention has been explained above with reference to the embodiments of the drawings.
The present invention is not limited to the above embodiments,
Any modifications can be made within the scope of the configuration described in the claims for utility model registration.

<Effects of the invention> As explained above, according to the invention, air convection is generated in the second and third spaces formed in the circuit case, and air is created between the circuit case and the back surface of the back mechanism panel. Air flow is generated in the formed first space, and the air flow efficiently dissipates heat generated from the electronic components of the circuit board to the outside of the circuit case, and the electronic components of the circuit board have a large amount of heat dissipation. By exposing the installation side to the third space, which has a large volume, heat dissipation from electronic components is effectively promoted, minimizing the temperature rise inside the circuit case, and preventing various electronic components from rising in temperature. malfunction may occur,
Alternatively, the inconvenience of electronic components being destroyed could be prevented.

In addition, since the circuit board is formed with a control area for attaching electronic components and a connection area for attaching connection pins, the electronic components can be arranged in an orderly manner and the circuit board can be formed compactly.
The insertion portions of the connectors are consolidated, and the wiring process for connection lines from the electrical game equipment is concentrated, making maintenance easier.

Furthermore, since the circuit board is accommodated inside the circuit case and the circuit case is arranged with the first space formed on the back surface of the back mechanism panel, electrical noise from various electrical drive sources can be avoided. It was possible to maintain good operation of the electrical game equipment installed on the game board by suppressing the negative effects of static electricity that is charged on the surface of many balls and accumulated on the back mechanism board side as they flow down. It is.

In addition, the circuit case can be attached to the back mechanism board by the first locking part provided on the outer surface of the circuit case, and the first locking part and the second locking part which are removably provided on the back surface of the back mechanism board. Since it is removably attached to the game board, it is extremely easy to replace the electrical control device along with the game board, and daily maintenance and repair work can also be performed extremely easily.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view of a pachinko machine, Fig. 2 is a rear view of the pachinko machine, Fig. 3 is an exploded perspective view of the electrical control device, and Fig. 4 is a An enlarged vertical sectional view of the electric control device attached to the prize ball discharge gutter, FIG. 5 is a perspective view showing the installed state of the electric control device and the prize ball discharge gutter, and FIG. 6 is the first locking member. FIG. 7 is a partially cutaway side view showing the state of engagement between the electrical control device and the second locking member, FIG. 7 is a schematic perspective view showing the state of connection between the electrical control device and each electrical game device, and FIG.
The figure is a front view of the central batted ball winning device, FIG. 9 is a longitudinal sectional view of the central batted ball winning device, and FIG. 10 is a rear view of the central batted ball winning device. In the figure, 1 is a pachinko machine, 7 is a game board, 11 is a central batted ball prize device, 12 is a variable batted ball prize device, and 18
2 is a back mechanism panel, 22 is a prize ball tank, 23 is a ball lead-out gutter, 24 is a prize ball discharge gutter, 32 is an electronic component, 33 is a circuit board, 33a is a control area, 33b is a control area, 33c is a gap, 34 35 is a connection pin, 35 is a circuit case, 35a is a first shielding member, and 35b is a second
a shielding member; 36 is a ventilation hole; 37 is a first locking member;
44 is a second locking member, 50 is a boss, 55 is a first space, 56 is a second space, and 57 is a third space.

Claims (1)

[Scope of Claim for Utility Model Registration] A game board is equipped with a prize ball discharging device that is arranged on the back side of the game board and allows a predetermined number of balls to be drawn out from a prize ball tank provided at the top to flow down to a predetermined number, and is made mainly of synthetic resin material. the formed back mechanism board; an electrical game device attached to the front side of the game board; a circuit board including electronic components for electrically controlling the electrical game device; and a circuit case housing the circuit board. The circuit board includes a control area for attaching electronic components for controlling the electrical gaming equipment, and a connector attached to the end of the connecting wire from the electrical gaming equipment, which can be attached and detached. a first box-shaped shielding member having an opening large enough to accommodate at least a control region of the circuit board; , and a lid-shaped second shielding member capable of closing the opening of the first shielding member are combined, and a first locking portion is provided on the outer surface, and on the back surface of the back mechanism panel, A protrusion that forms a first space between the back surface and the second shielding member, and a second locking portion that is removably connected to the first locking portion are provided, and the circuit case is arranged so that the second shielding member The circuit board is arranged by forming a second space between the member and the circuit board, and a third space having a larger volume than the second space between the first shielding member and the circuit board. The first locking part is removably locked to the second locking part to removably attach the circuit case to the back surface of the back mechanism panel, and the second locking part of the circuit case in this attached state is The space part and the third space part are made to communicate inside the circuit case by forming a gap part between the edge of the circuit board and the inner surface of the first shielding member, and the first shielding member The circuit case is communicated with the outside through the opened ventilation hole, and the heat generated by the electronic components is radiated by convection within the second and third spaces inside the circuit case, and is also radiated to the outside air from the ventilation hole. A pachinko machine, characterized in that static electricity generated on the surface of the back mechanism panel is prevented from affecting the electronic components by forming the first space.