JP4038781B2 - Pachinko machine board lid mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circuit board fraud prevention structure for preventing a fraudulent act on a circuit board mounted on a pachinko machine, and more particularly to a board lid mounting structure for a pachinko machine that covers the circuit board. .
[0002]
[Prior art]
In recent pachinko machines, a main board on which a ROM on which game contents of the pachinko machine are written is mounted. And in order to prevent that the game content of a pachinko machine is changed illegally, various fraud prevention structures are given to the main board.
[0003]
For example, in the main board shown in FIG. 7, the front side of the main board 101 placed on the chassis 100 is covered with the cover 102, and the four corners are fixed with screws 103, and the main board 101 is closed between the chassis 100 and the cover 102. Further, a certificate paper 104 is attached and sealed so as to sandwich the chassis 100 and the cover 102. When the certificate paper 104 is peeled off and pasted again, the trace appears on the certificate paper 104 and can be clearly confirmed with the naked eye. Therefore, the cover 102 cannot be removed intimately from the chassis 100 and is mounted on the main board 101. It is possible to prevent the contents of the ROM 105 from being rewritten illegally.
[0004]
[Problems to be solved by the invention]
However, in the anti-tampering structure applied to the main board of FIG. 7, if the certificate paper 104 is peeled off and pasted again using a special chemical, the trace will not appear on the certificate paper 104. Therefore, the contents of the ROM 105 mounted on the main board 101 may be illegally rewritten.
On the other hand, it is impossible to completely remove the substrate lid by brazing or the like due to another problem. That is, the finished product must undergo a sampling inspection by the authorities, so the substrate lid of any pachinko machine needs to be removable and reassembleable.
[0005]
Accordingly, the present invention has been made to solve the above-described problems, and provides a board lid mounting structure for a pachinko machine that cannot be restored to its original state after performing an illegal act on a circuit board. With the goal.
[0006]
[Means for Solving the Problems]
A substrate lid mounting structure for a pachinko machine according to claim 1, which has been achieved to achieve this object, includes: (a) a fixed control board chassis fixed with a predetermined gap; a plurality of circular holes; A board-side screw fixing plate having an engagement portion having a predetermined height on an outer periphery of the circular hole, and (b) a cylindrical shape having an edge portion having a predetermined thickness on a part of the circumference. , the small diameter portion is fitted in a freely rotatable and slidable in said plurality of circular holes, and a plurality of body stopper with a threaded hole attachment screw is mounted in the center, the engagement portion (c) (D) the edge is formed with a thickness increasing in the clockwise direction, and (e) the mounting screw is counterclockwise with respect to the main body stopper. When rotating around, the engaging portion and the edge portion are not engaged, and the main body stopper is idle. (F) When the mounting screw is rotated clockwise with respect to the main body stopper, the engaging portion and the edge portion are engaged, and the main body stopper is fixed, and the screw is (G) after the abutment surface of the mounting screw comes into contact with the board lid, the main body stopper approaches the control board chassis, and the main body stopper comes into contact with the control board chassis. When the engaging portion is disengaged from the edge portion and the mounting screw is rotated clockwise or counterclockwise, the body stopper rotates together with the mounting screw, and (h) the substrate lid A cutting hole is formed around each of the plurality of formed screw holes, and (i) by cutting a connection portion in the vicinity of the cutting hole, the screw hole is screwed into the screw hole. and characterized by separating the mounting screws are from the substrate lid That.
[0007]
[0008]
[0009]
The operation of the substrate lid mounting structure of the pachinko machine of the present invention having such a configuration will be described.
This is a board lid attachment structure for attaching a board lid to a control board chassis in which a control board to which a ROM or the like is attached is fixed on the back surface of the pachinko machine.
A board-side screw fixing plate is fixed to the control board chassis with fixing screws. Since the head of the fixing screw is covered and hidden by the substrate lid, it is impossible to remove the substrate-side screw fixing plate with the substrate lid closed. A main body stopper is fitted in the circular hole of the board-side screw fixing plate.
[0010]
A mounting screw, which is a right-hand screw, is inserted into one of a plurality of screw holes on the substrate lid side and rotated clockwise. Since the edge of the main body stopper engages with the engaging portion of the board-side screw fixing plate and the main body stopper does not rotate, first, the mounting screw is screwed into the center hole of the main body stopper.
Then, after the contact surface of the mounting screw comes into contact with the board lid, the main body stopper approaches the control board chassis. This is because the main body stopper is slidably fitted into the circular hole.
When the main body stopper comes into contact with the control board chassis, the engagement between the edge of the main body stopper and the engaging portion of the board-side screw fixing plate is released, and the main body stopper comes to rotate with the mounting screw. Of course, even when the attachment screw is rotated counterclockwise in order to remove the attachment screw, the main body stopper rotates with the attachment screw, and therefore the attachment screw cannot be removed.
[0011]
When it is necessary to remove the substrate lid to receive a sampling inspection by the authorities, the connection screw fixing stopper is fixed together with the mounting screw fixing stopper by cutting the connection part near the cutting hole with a nipper or the like. It is possible to remove the substrate lid while leaving it on the plate side. After completion of the inspection, the board lid can be attached to the control board chassis again by using the main body stopper fitted in the remaining one of the plurality of round holes.
According to this mounting structure, when an unauthorized person removes the board cover, the screw hole of the board cover is destroyed, so that the pachinko hall side can be immediately noticed illegally and easily on the spot. There are advantages that can be proven.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A side view, a partial cross-section of the substrate lid mounting structure of the pachinko machine of this embodiment is shown in FIG. 1, and a top view is shown in FIG. The operation diagram is shown in FIG.
A board-side screw fixing plate 12 is attached with two screws 26 to a control board chassis 11 fixed on the back surface of the pachinko machine. A control board (not shown) is attached to the control board chassis 11, and a board lid 18 is attached to cover the control board as shown in FIG. The control board is equipped with a ROM for storing a control program for generating a jackpot of the pachinko machine.
[0013]
The configuration of the board-side screw fixing plate 12 is shown in FIG. (A) is a top view, (b) is AA sectional drawing of (a).
Screw holes 17 are formed at both ends of the board-side screw fixing plate 12. Since the material of the board-side screw fixing plate 12 is resin and a tapping screw is used as a screw, the screw hole 17 is a through hole, and the female screw is not cut. It is the same even if a female screw is cut and a normal screw is used.
On the upper surface where the screw hole 17 is formed, a convex portion 13 for forming a predetermined gap W between the control board chassis 11 and the board-side screw fixing plate 12 is formed. Naturally, the height of the convex portion 13 is a predetermined gap W = 2.2 mm.
[0014]
On the straight line connecting the centers of the screw holes 17, three circular holes 16A, 16B, and 16C are formed at an equal pitch. In the present embodiment, the circular holes 16A, 16B, and 16C are not through holes but are counterbore holes, but the same applies to the through holes. In this embodiment, the depth A of the circular holes 16A, 16B, and 16C is set to A = 5.0 mm. Step portions 24A, 24B, and 24C are formed at the upper ends of the circular holes 16A, 16B, and 16C.
A pair of engaging portions 14 (A, B, C) having a predetermined height h1 on the outer periphery of the circular holes 16A, 16B, 16C and having a predetermined height h1 on the upper surface of the board-side screw fixing plate 12. 15 (A, B, C) are formed. As shown in FIG. 4B, the pair of engaging portions 14 and 15 include inclined portions 19A, 19B, and 19C that increase in thickness in a counterclockwise direction, that is, become an uphill.
In the present embodiment, the predetermined height h1 = 1.0 mm.
[0015]
A main body stopper 20 is fitted in the circular holes 16A, 16B, and 16C. The structure of the main body stopper 20 is shown in FIG. (A) is a top view, (b) is a side view. The body stopper 20 has a pair of edge portions 23 formed on a part of the circumference of the upper surface. The edge portion 23 is formed with an inclined portion 23a whose thickness increases clockwise in FIG. The edge 23 has a predetermined thickness h2, and in this embodiment, h2 = 1.0 mm. A step 25 having a thickness of 0.5 mm is formed below the edge 23. A stopper fitting portion 21 having a length B is continuous with the step portion 25. In the present embodiment, the outer diameter of the stepped portion 25 is 7.0 mm, the outer diameter of the stopper fitting portion 21 is 5.5 mm, and the outer diameter of the stepped portion 25 is about 1 from the outer diameter of the stopper fitting portion 21. .5mm larger. By making the outer diameter of the stepped portion 25 slightly larger than the outer diameter of the stopper fitting portion 21, the contact area between the main body stopper 20 and the board-side screw fixing plate 12 is reduced. Further, the step portion 25 is in contact with the step portions 24A, 24B, and 24C, receives a load applied during the screwing operation, and prevents the engaging portions 14 and 15 from being loaded. A screw hole 22 is formed at the center of the main body stopper 20. Since the material of the main body stopper 20 is resin and a tapping screw is used as a screw, the screw hole 22 is a through hole and the female screw is not cut. It is the same even if a female screw is cut and a normal screw is used.
[0016]
Next, the structure near the screw mounting portion of the substrate lid 18 will be described. FIG. 6 shows a top view. Three hole holes 31A, 31B, 31C for the mounting screw 27 are formed. A cover recess 32 for covering and concealing the head of the fixing screw 26 is formed outside the fool holes 31A and 31C. In addition, T-shaped air holes 33 are formed on both sides of each of the fool holes 31A, 31B, 31C.
By cutting the remaining connection portion formed by the air holes 33 using a tool such as a nipper, the board cover 18 can be removed from the control board chassis 11 with the mounting screw 27 left together with the main body stopper 20. .
[0017]
Next, the operation of the substrate lid mounting structure having the above configuration will be described. The change in the action state is shown by numbers 1, 2, and 3 in FIG.
As shown in FIG. 3, the board-side screw fixing plate 12 is fixed to the control board chassis 11 by a pair of fixing screws 26. That is, the board-side screw fixing plate 12 is fixed to the control board chassis 11 by screwing the fixing screw 26 that is a tapping screw into the screw hole 17. At this time, a gap having a height W of 2.2 mm is formed between the upper surface of the board-side screw fixing plate 12 and the control board chassis 11.
As shown in FIG. 3, the head of the fixing screw 26 has a structure that is completely hidden by the substrate lid 18. This is to prevent the board-side screw fixing plate 12 from being removed from the control board chassis 11 unless the board lid 18 is removed.
[0018]
The circular holes 16A, 16B, and 16C are formed at three locations, and the main body stopper 20 is fitted in each of them, so that the same is true regardless of which main body stopper 20 is screwed. As will be described later, three places are provided because once the screw is inserted into the main body stopper 20, the board lid 18 cannot be removed from the control board chassis 11 unless the components on the board lid 18 side are destroyed. This is because it can be removed up to two times by using in order. The destruction of the components on the substrate lid 18 side can be recorded on the pachinko hall side. Therefore, if an unauthorized person breaks the substrate lid 18 side and removes the substrate lid 18 from the control board chassis 11, the fraud It becomes obvious.
[0019]
FIG. 3 shows the process of screwing the mounting screws 27 as numbers 1, 2, and 3 for convenience. Actually, the process is performed on the main body stopper 20 of the same one circular hole 16. It is an action.
In No. 1, a mounting screw 27, which is a right-hand tapping screw, is inserted into the screw hole 22 of the main body stopper 20 and rotated clockwise. Since the edge portion 23 of the main body stopper 20 engages with the engaging portions 14 and 15 of the board-side screw fixing plate 12 and the main body stopper 20 does not rotate with the mounting screw 27, first, the main body stopper 20 is not inserted into the screw hole 22. The mounting screw 27 is threaded.
[0020]
The main body stopper 20 approaches the control board chassis 11 after the contact surface of the mounting screw 27 comes into contact with the board lid 18. This is because the main body stopper 20 is slidably fitted into the circular hole 16.
Then, the engagement between the edge of the main body stopper and the engagement portion of the board-side screw fixing plate is released immediately before the main body stopper 20 abuts on or just before the control board chassis 11. This is because the gap W between the board-side screw fixing plate 12 and the control board chassis 11 is larger than the sum of the thickness h1 of the engaging portions 14 and 15 and the thickness h2 of the edge portion 23.
Then, the main body stopper 20 comes to rotate with the mounting screw 27. Of course, even when the attachment screw 27 is rotated counterclockwise in order to remove the attachment screw 27, the main body stopper 20 is rotated with the attachment screw 27, so the attachment screw 27 cannot be removed, and the substrate cover Since 18 cannot be removed, there is no possibility that ROM or the like is illegally replaced.
[0021]
On the other hand, when it is necessary to remove the substrate lid in order to undergo a sampling inspection by the authorities, the fool holes 31 and the like are formed at the lower end portion of the substrate lid 18 as shown in FIG. By cutting the connection portion in the vicinity of the hole 33 with a nipper or the like, the substrate lid 18 can be removed in such a manner that the mounting screw 27 is left on the substrate-side screw fixing plate 12 side together with the main body stopper 20.
For example, when the fool hole 31B is used, the three connection portions 34B shown in FIG. 6 may be cut.
After completion of the sampling inspection, the substrate lid 18 is attached to the control board chassis 11 again by using the main body stopper 20 fitted in the remaining one of the plurality of circular holes 16A, 16B, 16C. Can do.
[0022]
As described above in detail, according to the board lid mounting structure of the present embodiment, (a) a plurality of circular holes 16A, 16B, 16C are fixed to the fixed control board chassis 11 with a predetermined gap. A board-side screw fixing plate 12 having engagement portions 14 and 15 having a predetermined height h1 on the outer periphery of the circular holes 16A, 16B and 16C, and (b) a predetermined thickness on a part of the circumference. It has a cylindrical shape with an edge portion 23 having h2, and a small diameter portion is rotatably and slidably fitted in the circular holes 16A, 16B, 16C, and has a screw hole 22 in which a mounting screw 27 is mounted at the center. (C) When the mounting screw 27 is rotated clockwise with respect to the main body stopper 20, the engaging portions 14, 15 and the edge portion 23 are engaged with each other. 20 is fixed and a mounting screw 27 is screwed in. (D) Mounting screw 27 After the contact surface comes into contact with the substrate lid 18, the main body stopper 20 approaches the control board chassis 11, and when the main body stopper 20 comes into contact with the control board chassis 11, the engagement between the engagement portions 14 and 15 and the edge portion 23 is established. When the mounting screw 27 is rotated clockwise or counterclockwise, the main body stopper 20 rotates together with the mounting screw 27. Therefore, an unauthorized person cannot remove the board lid 18, and therefore, There is no risk of ROM being replaced.
[0023]
Further, (e) inclined portions 19A, 19B, and 19C that increase in thickness in the counterclockwise direction are formed on the engaging portions 14 and 15, and (f) inclined portions 23a that increase in thickness in the clockwise direction are formed on the edge portion 23. (G) When the mounting screw 27 is rotated clockwise with respect to the main body stopper 20, the engaging portions 14 and 15 and the edge portion 23 are engaged to fix the main body stopper 20, and the mounting screw. When the mounting screw 27 is screwed and the mounting screw 27 is rotated counterclockwise, the main body stopper 20 rotates idly without the engaging portions 14 and 15 and the edge portion 23 being engaged with each other. Even if it is going to engage the engaging parts 14 and 15 and the edge part 23 by pressing 27, since it slips by each inclination part and does not engage, it is ensured that the attachment screw 27 is removed illegally. Can be prevented.
[0024]
Further, (h) a hole 33 as a cutting hole is formed around each of the plurality of fool holes 31 formed in the substrate lid 18, and (i) the connection portion 34 in the vicinity of the hole 33 is cut. As a result, the mounting screw 27 screwed into the main body stopper 20 can be separated from the substrate lid 18, so that if the unauthorized person removes the substrate lid 18, the holes 33 in the substrate lid 18 are destroyed, so the pachinko hall side Can quickly become aware of fraud and can be easily verified on the spot, which has the advantage of preventing fraudulent objections.
[0025]
In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the substrate lid mounting structure of the pachinko machine according to the present embodiment, the engaging portions are provided at two places, but there may be three or more places. There may also be four or more circular holes 16A, 16B, 16C.
Moreover, the shape of the hole 33 is arbitrary.
[0026]
【The invention's effect】
According to the board lid mounting structure of the pachinko machine of the present invention, (a) a fixed control board chassis is fixed with a predetermined gap, and there are a plurality of circular holes and a plurality of circular holes on the outer periphery. A board-side screw fixing plate including an engaging portion having a height; and (b) a cylindrical shape having an edge portion having a predetermined thickness on a part of a circumference, wherein a small diameter portion is formed in the plurality of circular holes. A plurality of main body stoppers having a female threaded portion that is rotatably and slidably fitted and has a mounting screw attached to the center thereof, and (c) the engaging portion has a thickness that increases in the counterclockwise direction. (D) the edge is formed with a slope that increases in thickness in the clockwise direction, and (e) the engagement portion is rotated when the mounting screw is rotated counterclockwise with respect to the main body stopper. And the edge portion does not engage with each other, the main body stopper rotates idly, and (f) the attachment to the main body stopper When the screw is rotated clockwise, the engaging portion and the edge are engaged, the main body stopper is fixed, the screw is screwed, and (g) the contact surface of the mounting screw is After the main body stopper approaches the control board chassis after coming into contact with the board lid, and the main body stopper comes into contact with the control board chassis, the engagement portion and the edge are disengaged, and the mounting screw When the main body stopper is rotated clockwise or counterclockwise, the main body stopper rotates together with the mounting screw, and (h) a cutting space is formed around each of the plurality of screw holes formed in the substrate lid. A hole is formed, and (i) by cutting the connecting portion in the vicinity of the cutting hole, the mounting screw screwed into the screw hole is separated from the substrate lid. Can't be removed, so ROM etc. can be exchanged illegally There is no possibility to be.
[0027]
Furthermore, a hole that is a hole for cutting is formed around each of the plurality of fool holes formed in the substrate lid, and the screwed into the main body stopper by cutting the connection part in the vicinity of the hole Since the screw can be separated from the board lid, if a fraudster removes the board lid, the holes in the board lid will be destroyed, so the pachinko hall side can immediately notice fraudulently and easily on the spot This has the advantage of preventing fraudulent objections.
[Brief description of the drawings]
FIG. 1 is a side view (partially cross-sectional view) of a substrate lid mounting structure of a pachinko machine according to an embodiment of the present invention.
FIG. 2 is a top view of a side view of a substrate lid mounting structure of a pachinko machine.
FIG. 3 is an operation explanatory diagram.
4 is a view showing a configuration of a board-side screw fixing plate 12. FIG.
FIG. 5 is a view showing a configuration of a main body stopper 20;
6 is a partial view of a substrate lid 18. FIG.
FIG. 7 is a view showing a conventional substrate lid mounting structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Control board chassis 12 Board | substrate side screw fixing board 14 and 15 Engagement part 16A, 16B, 16C Circular hole 18 Substrate lid 20 Main body stopper 23 Edge 27 Attachment screw 31 Float hole 33 Hole

Claims (1)

In the board lid mounting structure of the pachinko machine that attaches the board lid that covers the control board chassis fixed on the back of the pachinko machine,
A board-side screw fixing plate fixed to the fixed control board chassis with a predetermined gap, and including a plurality of circular holes and an engaging portion that is located on the outer periphery of the plurality of circular holes and has a predetermined height. When,
A screw having a cylindrical shape with an edge having a predetermined thickness on a part of the circumference, the small-diameter portion being rotatably and slidably fitted into the plurality of circular holes, and a mounting screw being mounted at the center Having a plurality of body stoppers with holes,
The engaging portion is formed with an inclination increasing in thickness in a counterclockwise direction,
The edge is formed with a slope increasing in thickness in the clockwise direction,
When the mounting screw is rotated counterclockwise with respect to the main body stopper, the main body stopper rotates idly without engaging the engaging portion and the edge portion,
When the mounting screw is rotated clockwise with respect to the main body stopper, the engaging portion and the edge are engaged, the main body stopper is fixed, and the screw is screwed in,
After the contact surface of the mounting screw comes into contact with the board lid, the main body stopper approaches the control board chassis, and the main body stopper comes into contact with the control board chassis. Is disengaged, and when the mounting screw is rotated clockwise or counterclockwise, the main body stopper rotates together with the mounting screw ,
A cutting hole is formed around each of the plurality of screw holes formed in the substrate lid,
A substrate lid mounting structure for a pachinko machine, wherein the mounting screw screwed into the screw hole is separated from the substrate lid by cutting a connection portion in the vicinity of the cutting hole .

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