JP2010110474A - Game machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a game machine provided with a substrate case that can reliably prevent illegal removal and replacement of a ROM for game control, mounted on a control substrate. <P>SOLUTION: A ROM cover 12 covering the ROM11 of the surface 7a of a main control substrate 7 is fixed by a plurality of fixing screws 46. Next, a main control substrate 7 is fixed on a cover case 18 by a fixing screw 47 and the outside of the surface 7a is covered by a cover case 18. Then, a base case 17 is provided close to a back face 7b like covering the outside of the back face 7b of the main control substrate 7. The cover case 18 is undetachably fixed on the base case 17 by a lock pin 50 and a caulk cap 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gaming machine including a board case that houses a control board on which a ROM for game control is mounted.

  Conventionally, in a gaming machine such as a pachinko gaming machine or a slot machine, a board case containing a control board (circuit board) for controlling the game is installed on the back side of the board surface. For example, in the case of a pachinko gaming machine, the control board is mounted with a CPU having an arithmetic processing function, a ROM, a RAM storing programs and data tables necessary for the progress of the game, and other electronic components such as resistors. The board case serves to protect the control board from the outside.

  However, in the pachinko hall where such a pachinko machine is installed, an unauthorized person replaces the ROM attached to the main control board with an illegal ROM in which the program and the data table of the jackpot lottery probability are modified, and this illegal act As a result, there was a problem that the pachinko hall suffered a great deal of damage.

  For this reason, conventionally, in order to prevent such an illegal act, a technique in which various measures are taken for the sealing structure of the substrate case has been adopted. For example, after the main control board is fastened with a fastening member inside the cover case, the cover case is overlaid on the main body case, and the main body case and the cover case are fixed to be separable by a lock pin and a caulking cap. Yes.

  In recent years, in a board case in which a ROM cover that covers the ROM is disposed on the main control board, after the ROM cover, the control board, and the main body case are fastened by a fastening member, the main body case and the cover case cannot be separated by a lock pin and a caulking cap. A fixed sealing structure is also employed.

The gaming machine of Patent Document 1 discloses a sealing structure in which a board case that accommodates a control board is composed of a main body case and a cover case that covers the main body case, and the main body case and the cover case are fixed in a separable manner by caulking pins. ing.
Japanese Patent No. 4071820

  In the conventional substrate case sealing structure, if an unauthorized person performs an unauthorized act of replacing the regular ROM of the main control board with an unauthorized ROM, the caulking cap is cut and broken with a tool such as a nipper and then the lock pin is After the removal and separation of the main body case and the cover case, the regular ROM is replaced with an unauthorized ROM by removing the fastening member.

  Also, in the sealing structure of the substrate case provided with the ROM cover, after separating the main body case and the cover case in the same procedure as described above, the ROM cover is removed from the main control board by removing the fastening member, and the regular ROM is installed. Replace with illegal ROM.

As described above, since the conventional substrate case has a structure in which a plurality of fixing points (sealing points) are provided, the illegal ROM can be prevented from being replaced by an unauthorized person. Therefore, a sealing structure that requires more labor and time for the removal operation is desired.
An object of the present invention is to provide a gaming machine provided with a board case having a sealing structure that can reliably prevent unauthorized removal and replacement of a game control ROM attached to a control board.

In order to achieve the above object, the present invention employs the following configuration. The reference numerals in parentheses show an example of the correspondence relationship with the drawings in order to help understanding of the present invention, and do not limit the technical scope of the present invention.
A gaming machine according to claim 1 covers a ROM (11) in a gaming machine (1) comprising a control board (7) and a game control ROM (11) attached to the control board (7). A ROM cover (12), a ROM cover (12) fixed to the first surface (15) of the control board (7) on the electronic component mounting side by a plurality of first fastening members (46), and a control board ( 7) a first case (17) disposed adjacent to the second surface (16) opposite to the first surface (15) and covering the outside of the second surface (16), and a control board (7) A box-like second case (18) that covers the outside of the first surface (15) of the first, a plurality of second fastening members (47) for fixing the control board (7) to the second case (18), and a first The case (17) is provided with a plurality of lock mechanisms for fixing the second case (18) in an inseparable manner.

  When the control board (7), the first and second cases (17, 18), and the ROM cover (12) are assembled from the separated state to the use state, first, the ROM cover (12) is the first of the control board (7). The ROM (11) of the surface (15) is covered and fixed to the first surface (15) by a plurality of first fastening members (46). Next, the control board (7) is fixed to the second case (18) by the plurality of second fastening members (47). Next, the first case (17) is disposed close to the second surface (16) of the control board (7), and the outer side of the second surface (16) of the control board (7) is the first case (17). The first case (17) and the second case (18) are fixed so as not to be separated by a plurality of locking mechanisms.

The gaming machine of claim 2 is characterized in that, in the invention of claim 1, the first fastening member (46) is made of a screw.
The gaming machine according to claim 3 is characterized in that, in the invention of claim 1 or 2, the second fastening member (47) is made of a screw.

A game machine according to a fourth aspect is characterized in that, in any one of the first to third aspects, the lock mechanism includes a lock pin (50) and a caulking cap (51).
According to a fifth aspect of the present invention, there is provided a gaming machine according to any one of the first to fourth aspects, wherein the holder case (14) disposed on the outside of the first case (17) so as to overlap the first case (17) is backed. The mechanism plate (6) is provided in a fixed state, and the upper end of the first case (17) is hinged to the upper end of the holder case (14).

  According to the first aspect of the present invention, the ROM cover that is fixed to the first surface of the control board with the plurality of first fastening members and covers the ROM, and the second surface of the control board is disposed in proximity to the second surface of the control board. A first case that covers the outside, a second case that covers the outside of the first surface of the control board, a plurality of second fastening members that fix the control board to the second case, and the second case that cannot be separated from the first case Since there are multiple locking mechanisms to be fixed to the board, increasing the number of fixing points (sealing points) requires time and effort to remove the control board game control ROM, thus preventing illegal acts. can do.

  That is, when the control board is taken out from the first and second cases and the ROM is replaced with an illegal ROM, first, the first and second cases are separated after the plurality of lock mechanisms are destroyed with a tool or the like. Next, after removing the second fastening member, the control board is taken out from the second case. Further, the ROM can be reached by removing the ROM cover from the first surface of the control board after removing the first fastening member. For this reason, these series of removal operations take time and effort, and the ROM cannot be easily removed.

According to the invention of claim 2, since the first fastening member is made of a screw, the ROM cover can be securely fastened and fixed to the control board.
According to the invention of claim 3, since the second fastening member is made of a screw, the control board can be securely fastened and fixed to the second case.

  According to the invention of claim 4, since the lock mechanism has the lock pin and the caulking cap, the first case and the second case can be firmly fixed in a non-removable manner and the illegal ROM replacement action can be reliably prevented. it can.

  According to invention of Claim 5, the holder case arrange | positioned in the state which overlaps with the 1st case on the outer side of the 1st case is fixed to the back mechanism plate, and the lower end of the first case is provided at the lower end of the holder case. Since the first and second cases can be tilted from the fixed posture by the hinge connection, the second surface of the control board can be inspected. Unauthorized acts on the second surface of the control board can be reliably prevented.

This embodiment is an example in which the present invention is applied to a gaming machine including a control board and a game control ROM attached to the control board.
Hereinafter, the best mode for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, in the pachinko gaming machine 1, an opening / closing frame 2 is attached to an outer frame attached to an island structure of a pachinko hall so that the opening / closing frame 2 can be opened and closed, and an opening / closing door 3 is attached to the opening / closing frame 2 so as to be opened and closed. Yes. A game board (not shown) is mounted on the open / close frame 2, and a game area (not shown) is formed on the front side of the game board. A window 3a is formed in the opening / closing door 3, and a transparent glass plate 3b is attached to the window 3a, and the front side of the game area is covered with the glass plate 3b.

  A storage tray 4 for storing game balls and a launching handle 5 operated by the player are mounted below the window 3 a of the open / close door 3. When the firing handle 5 is rotated, the game ball introduced from the storage tray 4 to the firing position is launched. Here, when a plurality of game balls exist in the storage tray 4, for example, the plurality of game balls are continuously fired at intervals of about 0.6 seconds.

  As shown in FIG. 2, a back mechanism board 6 is provided on the back side of the game board. The back mechanism board 6 includes a main board unit 8 having a main control board 7, an image board unit 9 having an image control board, Each power supply board unit 10 having a power supply board is attached at a predetermined position. On the surface of the cover case 9a of the image board unit 9 and the surface of the cover case 10a of the power board unit 10, a plurality of small-diameter heat radiation holes 9b and 10b for releasing heat generated inside are formed.

Next, the main control board unit 8 will be described in detail.
As shown in FIGS. 3 to 8, the main control board unit 8 includes a main control board 7, a ROM cover 12 that covers the game control ROM 11 of the main control board 7, and a board case 13 that houses the main control board 7. And a holder case 14 that supports the substrate case 13 in a swingable manner.

  As shown in FIGS. 3 to 6, the board case 13 covers the outside of the back surface 7 b (second surface) opposite to the surface 7 a (first surface) on the electronic component mounting side of the main control board 7. (First case) and a cover case 18 (second case) covering the outside of the surface 7a of the main control board 7 are provided. A plurality of locking mechanisms 30 for fixing the base case 17 and the cover case 18 so as not to be separated are also provided. The base case 17 and the cover case 18 are formed of a transparent synthetic resin molded body so that the front surface 7a and the back surface 7b of the main control board 7 can be seen from the outside.

  As shown in FIG. 3, the base case 17 is formed of a horizontally-long rectangular and shallow box-shaped resin molded body, and has an upper end wall, a lower end wall, and a right end wall having a narrow width that rises perpendicularly from the main body plate portion of the base case 17 to the front side. And. The base case 17 is disposed in proximity to the back surface 7 b of the main control board 7. A pair of engagement pieces 19 a and 19 b that can be engaged with a pair of upper and lower engagement grooves 20 a and 20 b of the cover case 18 are formed on the upper end wall and the lower end wall of the base case 17. On the upper end wall of the base case 17, a pair of hinge bearing portions 21 a and 21 b that are hinge-coupled to the holder case 14 are provided so as to protrude upward.

  At the left end portion of the base case 17, a fitting portion 22 that fits into the cover case 18 is provided in a protruding shape. A board external terminal board cover 23, which is located below the board external terminal board cover 23, has a width in the front-rear direction and has a U-shape projecting outward from the right end wall of the base case 17. An overhanging base side guard wall 24 is provided.

  Four boss portions 26 located on the inner side of the base guard wall 24 are integrally formed in the vicinity of the outer side of the right end wall of the base case 17. Each boss portion 26 includes a short columnar boss main body portion, a rib connecting the boss main body portion to the base-side guard wall 24, a shelf portion connected to the front end of the boss main body portion, and the upper and lower right side portions of the shelf portion. And a U-shaped portion 26a that is integral with the shelf. A small hole for engaging a tip of a lock pin 50 described later is formed in the boss main body, and the lock pin 51 cannot be removed by this boss main body.

As shown in FIGS. 3 to 5, the cover case 18 is formed in a box shape that opens in the rear of a horizontally long rectangle having a depth of about 20 mm, and is made of a transparent synthetic resin material.
A main control board 7 on which various electronic components for controlling the pachinko gaming machine 1 are mounted is fixed inside the cover case 18. The base case 17 is superposed on the cover case 18 to which the main control board 7 is fixed, and the cover case 18 is fixed to the base case 17 in an inseparable manner by four sets of lock mechanisms 30. Thus, the main control board 7 is housed in the housing space formed between the base case 17 and the cover case 18.

  A plurality of openings 28 a to 28 f for exposing the plurality of board-side connectors 27 a to 27 f mounted on the main control board 7 are formed in the upper end portion and the lower end portion of the cover case 18, respectively. A reset pin cover 29 is pivotally supported at the left end of the front surface (front surface) of the cover case 18.

  Groove forming portions 18 a and 18 b facing the engaging pieces 19 a and 19 b of the base case 17 are formed at the upper end portion and the lower end portion of the cover case 18. The groove forming portions 18a and 18b are formed with engaging grooves 20a and 20b for inserting the engaging pieces 19a and 19b and sliding the base case 17, respectively. The engaging pieces 19a and 19b are formed with three L-shaped slits 15a to 15c that are slid by introducing the connecting portions on the groove forming portions 18a and 18b side.

  As shown in FIG. 6, a main control board positioning protrusion 31 projects from the inside of the upper right corner of the cover case 18. Inside the cover case 18, a boss portion 25 protrudes toward the main control board 7 at a portion below the protrusion 31, and a screw hole is formed in the boss portion 25. . In a state where the projection 31 is fitted in the pin hole 56 of the main control board 7 and the main control board 7 is positioned, the main control board 7 is covered by screwing the screw 47 into the screw hole of the boss portion 25. It is fixed to the case 18.

As shown in FIGS. 3 and 4, a fitting hole 32 into which the fitting portion 22 of the base case 17 is fitted is formed in the left end wall portion of the cover case 18 so as to penetrate in the left-right direction.
A U-shaped cover side guard wall 34 that engages with the inside of the base side guard wall 24 is formed at the right end portion of the cover case 18. A square-shaped tongue piece 35 projects outward from the upper front end of the cover-side guard wall 34, and a two-dimensional bar code is recorded on the surface of the tongue piece 35. An engagement piece 36 projects rightward from the center of the right end surface of the cover-side guard wall 34. When the cover case 18 is engaged with the base case 17 and is slid through the L-shaped slits 15a to 15c, the fitting portion 22 is fitted into the fitting hole 32, and the engagement piece 36 is the base side guard. The cover case 18 is not separated from the base case 17 by engaging with the engagement hole 16 of the wall 24.

  Four sets of lock mechanisms 30 for fixing the cover case 18 to the base case 17 so as not to be separated are provided. The lock mechanism 30 includes the boss portion 26, the sealing portion 37, the lock pin 50, and the caulking cap 51. The four sets of lock mechanisms 30 are provided at the right end of the substrate case 13. As shown in FIG. 4, four cylindrical sealing portions 37 are provided inside the cover-side guard wall 34, and these sealing portions 37 are used when the base case 17 is overlapped with the cover case 18 and joined. The four boss portions 26 are formed so as to face each other coaxially. A small hole for fitting the lock pin 50 is formed in the back end wall of the sealing portion 37.

  When the cover case 18 is overlapped with the base case 17 and is slid through the L-shaped slits 15a to 15c, the small hole of the boss portion 26 and the small hole of the sealing portion 37 face each other. In this state, the lock pin 50 is inserted into the sealing portion 37, and the end of the lock pin 50 is engaged with the small hole of the boss main body portion of the boss portion 26 by pushing the caulking cap 51 in a state of being fitted on the lock pin 50. The cap 51 is pushed into the cylindrical hole of the sealing portion 37 so that the caulking cap 51 cannot be removed from the outside, and the base case 17 and the cover case 18 are caulked by the four lock mechanisms 30.

  As shown in FIGS. 3 and 6, a main control board 7 made of a printed circuit board is accommodated in the cover case 18, and the main control board 7 is fixed to the boss portion 25 of the cover case 18 with a fixing screw 47 (first 2 fastening members). The main control board 7 has a front surface 7a as an electronic component mounting surface and a back surface 7b as a solder surface. On the front surface 7a, a CPU 38 having an arithmetic processing function, a RAM 39 which is a readable / writable memory, a ROM 11 which is a read-only memory, a plurality of board side connectors 27a to 27f to which external connectors are connected, a plurality of resistors 40, a plurality of resistors Various electronic components such as a capacitor 41 and a reset pin 42 are mounted.

  Here, the ROM 11 for game control stores a data table such as a system program for game control of the pachinko gaming machine 1, a winning probability of a big hit, and a payout number of winning balls at the time of winning. A series of gaming operations are controlled by the CPU 38 performing arithmetic processing in accordance with a system program stored in the ROM 11 on the main control board 7.

  As shown in FIGS. 3 and 5, the ROM 11 attached to the surface 7a of the main control board 7 is illegally removed from the main control board 7, or the game control program and the jackpot lottery probability data table are modified. It is covered with a ROM cover 12 so as not to be replaced with an illegal ROM. The ROM cover 12 has a horizontally long rectangular box-shaped ROM cover main body 12a in front view, and a pair of flat mounting pieces 12b extending from the left and right ends of the opening of the ROM cover main body 12a. The ROM cover main body 12a and the mounting piece 12b are integrally formed of a transparent synthetic resin material. The mounting piece 12b of the ROM cover 12 is fastened and fixed to the surface 7a of the main control board 7 by a fixing screw 46 (first fastening member). Boss portions 49 corresponding to the pair of fixing screws 46 are formed to protrude from the base case 17, and the tip ends of the fixing screws 46 are screwed into the screw holes 45 of the boss portions 49.

  As shown in FIGS. 3, 7, and 8, the holder case 14 is a horizontally-long rectangular transparent resin molding in a front view, and is disposed on the rear side of the base case 17 so as to overlap the base case 17. The A pair of hinge shaft attachment portions 43 a and 43 b are provided on the upper end wall portion 14 a so as to correspond to the pair of hinge bearing portions 21 a and 21 b of the base case 17. The pair of hinge shaft mounting portions 43a and 43b and the pair of hinge bearing portions 21a and 21b are connected by a pair of metal hinge pins 44, respectively. At the center of the lower end wall portion 14 b of the holder case 14, a locking hook 52 that can be engaged and disengaged with the groove forming portion 18 b at the lower end portion of the cover case 18 is provided.

  Next, assembly work for assembling the main control board unit 8 from the separated state to the used state will be described. First, as shown in FIGS. 3 and 5, the ROM cover 12 is attached to the surface 7 a of the main control board 7 so as to cover the ROM 11. The ROM cover 12 is placed on the surface 7 a of the main control board 7 with the screw holes of the pair of mounting pieces 12 b aligned with the screw holes of the main control board 7. Next, the fixing cover 46 is inserted into the screw hole of the mounting piece 12 b and the screw hole of the main control board 7 and screwed into the screw hole 45 of the boss portion 49 of the base case 17, so that the ROM cover 12 is connected to the main control board 7. Fastened and fixed to the base case 17.

  Next, as shown in FIGS. 3 and 6, the positioning projections 31 of the cover case 18 are fitted into the positioning holes at the corners of the main control board 7, and the main control board 7 is temporarily placed inside the cover case 18. The main control board 7 is fastened and fixed inside the cover case 18 by being inserted into the screw holes 48 of the main control board 7 and screwed into the screw holes of the boss 25 of the cover case 18. Is done.

  Next, the cover case 18 to which the main control board 7 is fixed is superposed on the base case 17, and the engagement pieces 19a and 19b of the base case 17 are engaged with the engagement grooves 20a and 20b of the cover case 18 before the base case. 17 is slid to the left relative to the cover case 18. By fitting the fitting portion 22 of the base case 17 into the fitting hole 32 of the cover case 18 and engaging the engagement piece 36 of the cover case 18 with the engagement hole 16 of the base case 17, The cover case 18 is overlapped and engaged.

  Next, as shown in FIG. 3, the four lock pins 50 are respectively inserted into the four sealing portions 37 of the cover case 18, and the four caulking caps 51 are pushed into the sealing portions 37, thereby leading the tips of the lock pins 50. Engages with a small hole in the boss body portion of the boss portion 26 of the base case 17, and the base case 17 and the cover case 18 are crimped and sealed and fixed. The substrate case 13 is firmly fixed by the four lock mechanisms 30 so as not to be separated.

  Next, as shown in FIGS. 3, 8, and 9, the pair of hinge bearing portions 21 a and 21 b of the base case 17 are engaged with the hinge pins 44 of the pair of hinge shaft mounting portions 43 a and 43 b of the holder case 14. Let it be hinged. By this hinge connection, the substrate case 13 is pivotally attached to the holder case 14 so as to be swingable forward about the hinge pin 44, and the locking hook 52 is engaged with the groove forming portion 18b at the lower end portion of the cover case 18. By doing so, it is locked to the holder case 14.

  Next, as shown in FIGS. 9 and 10, the holder case 14 is fixed to the back mechanism plate 6 in a vertical posture by a fixing pin (not shown). As shown in FIG. 10, when the substrate case 13 is in use, the surface 7a of the main control substrate 7 can be directly visually observed. On the other hand, as shown in FIG. 9, when it is desired to inspect the back surface 7 b of the main control board 7, the locking hook 52 is detached from the cover case 18, and the board case 13 is swung to the front side to thereby inspect the main control board. The back surface 7b of 7 becomes visible.

The operational effects of the pachinko gaming machine 1 according to the embodiment described above will be described.
In the board case 13, when an unauthorized person removes the regular ROM 11 of the main control board 7 from the board case 13 and replaces it with the unauthorized ROM, first, a plurality of lock pins 50 and caulking caps 51 are cut with a cutting tool such as a nipper or a cutter. The base case 17 and the cover case 18 are separated from each other by cutting or destroying them to open the sealed state of the substrate case 13.

  Next, after removing the fixing screws 47 with a tool such as a screwdriver, the main control board 7 is taken out from the cover case 18. Further, the ROM 11 can be reached by removing the ROM cover 12 from the surface 7a of the main control board 7 after removing the pair of fixing screws 46 from the mounting piece 12b with a tool such as a screwdriver. Since the number of fixing points until reaching the ROM 11 is increased, it takes time and effort to perform a series of detaching operations until reaching the ROM 11, so that it is possible to reliably prevent an illegal ROM replacement act.

  A holder case 14 disposed outside the cover case 18 so as to overlap the base case 17 and the cover case 18 is fixed to the back mechanism plate 6 on the back side of the game board, and the cover case 18 is provided at the upper end of the holder case 14. Since the upper end of the board is hinge-coupled, the board case 13 can be swung by the hinge-coupling, and an illegal act on the back surface 7b of the main control board 7 can be inspected. Therefore, an illegal act on the back surface 7b of the main control board 7 can be surely prevented.

A modified example in which the embodiment is partially modified will be described.
1] In the embodiment, four sets of lock mechanisms 30 are provided on the substrate case 13, but five or more sets of lock mechanisms may be provided. Further, a plurality of lock mechanisms may be provided at the left end, upper end, and lower end of the substrate case 13.

  2] In the embodiment, the ROM cover 12 is fastened and fixed to the surface 7a of the main control board 7 by the fixing screws 46, but may be fixed by heat caulking. The shape of the ROM cover may be any shape that can prevent unauthorized removal from the outside that covers the ROM 11.

  3] A plurality of boss portions 25 having screw holes in the cover case 18 may be provided, and the main control board 7 may be fixed inside the cover case 18 with a plurality of fixing screws.

4] The present invention may be applied not only to the substrate case 13 that accommodates the main control substrate 7 but also to the substrate case that accommodates the image control substrate and the effect control substrate.
5] In the embodiment, an example in which the present invention is applied to a pachinko gaming machine is shown, but the present invention may be applied to a slot machine or other gaming machines.

  6] In addition, those skilled in the art can implement embodiments in which various modifications are added to the embodiment without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

1 is a schematic front view of a pachinko gaming machine according to an embodiment of the present invention. It is a schematic rear view of a pachinko gaming machine. It is a disassembled perspective view of a control unit. It is a perspective view of a substrate case. It is principal part sectional drawing concerning the ROM cover of a substrate case. It is the VI-VI sectional view taken on the line of FIG. It is a perspective view which shows the state which rotated the substrate case. It is a perspective view which shows a main control board unit. It is a longitudinal cross-sectional view which shows the state which test | inspects the back surface of a main control board. It is a longitudinal cross-sectional view which shows the use condition of a substrate case.

Explanation of symbols

1 Pachinko machine 6 Back mechanism plate 7 Main control board 7a Surface (first surface)
7b Back side (second side)
11 ROM
12 ROM cover 13 Substrate case 14 Holder case 17 Base case (first case)
18 Cover case (second case)
30 Locking mechanism 46 Fixing screw (first fastening member)
47 Fixing screw (second fastening member)
50 Lock pin 51 Caulking cap

Claims (5)

In a gaming machine comprising a control board and a game control ROM attached to the control board,
A ROM cover for covering the ROM, the ROM cover fixed to the first surface of the control board on the electronic component mounting side by a plurality of first fastening members;
A first case disposed adjacent to a second surface opposite to the first surface of the control board and covering an outer side of the second surface;
A box-like second case covering the outside of the first surface of the control board;
A plurality of second fastening members for fixing the control board to a second case;
A plurality of locking mechanisms for securing the second case to the first case in an inseparable manner;
A gaming machine characterized by comprising:   The gaming machine according to claim 1, wherein the first fastening member is made of a screw.   The gaming machine according to claim 1, wherein the second fastening member is made of a screw.   The gaming machine according to claim 1, wherein the lock mechanism includes a lock pin and a caulking cap.   A holder case disposed on the outside of the first case so as to overlap the first case is fixed to the back mechanism plate, and the upper end of the first case is hinged to the upper end of the holder case. The gaming machine according to any one of claims 1 to 4.