JP3595487B2 - Circuit board case sealing structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a circuit board case sealing structure for protecting a circuit board provided with a plurality of electronic components mounted on a game machine and electronically controlling game contents.
[0002]
[Prior art]
Conventionally, in a gaming machine such as a pachinko machine, a special gaming value can be obtained by electronic control. A board on which a central processing unit (hereinafter, referred to as a CPU), a storage element (hereinafter, referred to as a ROM), which is hardware for electronic control, is mounted, together with other conductive components, etc. Covered by a protective cover to protect from
[0003]
The protective cover is a case made of a synthetic resin, and includes a main body base and a main body cover. When the inspection of the whole substrate is required, the engaging portion of the case is opened.
[0004]
By the way, in order to prevent fraud, such a protective cover has been required to be able to prevent or detect unauthorized opening while allowing multiple opening when there is a legitimate reason. . For this reason, various methods have been proposed for enclosing a substrate in a protective cover (main body base and main body cover) using a sealing plug or a special insertion pin (for example, Japanese Patent Application Laid-Open Nos. No. 10-290870).
[0005]
On the other hand, in recent years, plastic materials used in such pachinko machines as pachinko machines have been cited as a candidate for material recycling as one of the causes of environmental problems. Are gathering. However, as described above, the protective cover used in a game machine such as a pachinko machine is made so that parts and members cannot be easily separated for countermeasures against fraud, and is sealed with a tool such as a nipper. Although the main body cover can be removed from the main body base by cutting the part, the respective sealing means remain strongly coupled to the main body base including the separated part. For this reason, it takes time and effort to separate the remaining sealing means and the main body base, which is a cause of high cost of the recycling process.
[0006]
[Problems to be solved by the invention]
In view of the above facts, the present invention can prevent unauthorized modification of a circuit board enclosed in a circuit board case composed of a main body base and a main body cover, can not only be quickly opened at the time of inspection, but also can be used after the use. It is an object of the present invention to provide a circuit board case sealing structure that can easily perform a recycling process and reduce a recycling process cost.
[0007]
[Means for Solving the Problems]
The sealing structure of the circuit board case of the invention according to claim 1 is a circuit board case sealing structure for protecting a circuit board provided with a plurality of electronic components attached to a game machine and electronically controlling a game content, A body base supporting the circuit board, a body cover fixed to the body base to cover and protect the circuit board, and a body cover capable of taking on a cover-released state in which the circuit board is uncovered; and a screw portion. And a head formed integrally with the screw part and separable from the screw part and formed with a spring piece that expands and contracts in the radial direction, and is inserted and screwed from the main body cover toward the main body base. , the body base and a fastening bolt made of the same resin material as the body cover, corresponding to the spring piece of the fastening bolt is provided on the fastening bolt screw hole of the body cover, wherein the spring piece child engagement In and a locking portion which remains in the fastening bolt screwed hole and prevents the exit of the head towards the fastening bolt body cover insertion side, and the body base and the body cover by the fastening bolt At the same time, the spring piece is enlarged in diameter and engaged with the engagement portion by expanding the diameter of the spring piece, and the head is separated from the screw portion by screwing, so that the main body base and the main body cover are fixed. , Is characterized.
[0008]
According to the first aspect of the present invention, the circuit board case is constituted by the main body base and the main body cover, and the circuit board is supported by the main body base and protected by being covered with the main body cover. The circuit board is provided with a large number of electronic components including an IC chip such as a CPU, a ROM, and a RAM. In particular, by replacing the IC chip such as a ROM, the probability of having a special game value can be changed. For this reason, by housing the circuit board in the circuit board case, the electronic components on the circuit board are protected from contact with the outside, and at the same time, unauthorized replacement of IC chips such as ROMs is prevented.
[0009]
Here, in a fixed state of the main body base and the main body cover, the main body base and the main body cover are fastened by fastening bolts, and furthermore, the heads of the fastening bolts are attached to locking portions provided on the main body cover. The formed spring piece expands in diameter and is locked, and the head of the fastening bolt is separated by being screwed off from the screw portion. Therefore, even if an illegal operation of the fastening bolt is attempted from the outside, the screw portion, which is blocked by the head and substantially fastens the main body base and the main body cover, cannot be operated. Unauthorized modification of the enclosed circuit board can be prevented.
[0010]
On the other hand, when the circuit board case (the body base, the body cover and the circuit board) is used and the body cover is separated from the body base and the circuit board is uncovered in order to carry out a recycling process, the fastening made of resin is performed. If the bolt is crushed with a tool such as a drilling machine, the main body cover can be easily separated from the main body base and the circuit board can be removed. In this case, since the main body cover and the main body base can be separated and the circuit board can be removed simply by crushing the fastening bolts, this recycling work does not take time and the cost of the recycling process can be reduced. it can.
[0011]
Thus, the circuit board case sealing structure according to claim 1 can prevent not only unauthorized modification of the circuit board enclosed in the circuit board case including the main body base and the main body cover, but also recycling processing after use. Can be easily performed, and the cost of the recycling process can be reduced.
[0012]
According to a second aspect of the present invention, there is provided the circuit board case sealing structure according to the first aspect, wherein the fastening bolt for fastening the main body base and the main body cover is passed through the circuit board. It is characterized by being fixed.
[0013]
In the circuit board case sealing structure according to the second aspect, the circuit board itself is also held by the fastening bolt, so that the circuit board can be more securely sealed in the circuit board case.
[0014]
The circuit board case sealing structure according to a third aspect of the present invention is the circuit board case sealing structure according to the first or second aspect, wherein a plurality of fastening positions of the main body base and the main body cover by the fastening bolt are provided. The main body base and the main body cover are provided with a slit portion capable of operating the fastening bolt by cutting off the main body base facing the tip portion of the fastening bolt in a fastened state, and the main body cover is attached to the main body. When separating from the base to make the circuit board uncovered state, the screw portion of the fastening bolt is pulled out to the side of the main body base by cutting off the slit portion to release the fastening and fixing by the fastening bolt, Each time the fastening is released, it is sequentially re-fixed at a new fixing point.
[0015]
In the circuit board case sealing structure according to the third aspect, when the main body cover is separated from the main body base and the cover of the circuit board is released in order to inspect the circuit board or the like, it faces the distal end portion of the fastening bolt. Then, if the slit portion provided in the main body base is cut off, the screw portion of the fastening bolt is exposed. Therefore, by pulling out the screw portion of the fastening bolt toward the body base, the fastening and fixing between the body base and the body cover by the fastening bolt can be released.
[0016]
After the inspection, the circuit board is supported on the main body base and covered with the main body cover so that the circuit board is protected again by the circuit board case, and is re-fixed using new fastening bolts.
[0017]
Therefore, if the necessary number of fastening and fixing positions by the fastening bolts are set in advance (for example, if three opening operations are required, at least four fastening and fixing positions are set in advance), unauthorized opening can be prevented. When necessary, the main body cover can be separated from the main body base to make the circuit board uncovered.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a schematic view of the back surface of a pachinko gaming machine 10 to which a circuit board case sealing structure according to an embodiment of the present invention is applied.
[0019]
A circuit board case 12 containing a circuit board 18 having a plurality of electronic components for electronically controlling the game content of the pachinko gaming machine 10 is attached to the center left side of the back surface of the pachinko gaming machine 10.
[0020]
As shown in FIG. 2, a transparent hard case made of a synthetic resin is used for the circuit board case 12, and a main body base 12A supporting the circuit board 18 (shown in FIG. 4) and a main body covering the circuit board 18 are provided. And a cover 12B. In FIG. 2, openings, various members, and the like required for electrical connection are not shown.
[0021]
The circuit board 18 has a plurality of electronic components (not shown) including an IC chip such as a CPU, a ROM, and a RAM mounted on a rectangular substrate, and these electronic components are arranged on a game board surface of the pachinko gaming machine 10. The electric accessory unit or the like is controlled. In order to protect the circuit board 18 from contact with other conductive parts or the like, impact, or the like, the circuit board 18 is covered with the circuit board case 12 during manufacturing.
[0022]
One of the long sides of the main body base 12A of the circuit board case 12 is open, and a board slide groove 14 is formed in the inner peripheral wall of the main body base 12A. The circuit board 18 is slid and inserted along the board slide groove 14, and the circuit board 18 is housed and supported in the main body base 12A. On the inner peripheral wall of the main body base 12A, a cover slide groove 16 similar to the board slide groove 14 is formed above the board slide groove 14. The main body cover 12B is slid and inserted along the cover slide groove 16 and is superimposed on the main body base 12A to be in a mounted state. That is, the main body cover 12B can be in an attached state in which the main body cover 12B is fixed to the main body base 12A to cover and protect the circuit board 18 and in an uncovered state in which the circuit board 18 is uncovered.
[0023]
The circuit board case 12 is transparent so that the circuit board 18 accommodated in the circuit board case 12 can be viewed without removing the circuit board 18 from the circuit board case 12. Thereby, the appearance inspection can be easily performed while the abnormality of the electronic components mounted on the circuit board 18 is stored in the circuit board case 12.
[0024]
Here, the main body base 12A and the main body cover 12B are fastened and fixed by fastening bolts 20.
[0025]
The fastening bolt 20 is made of resin, and includes a screw portion 22 and a head portion 24 integrally formed with the screw portion 22, as shown in FIGS. 3 (A) to 3 (C). Between the screw portion 22 and the head portion 24 (continuous portion) is formed a small diameter to form a constricted portion 26. When the torsional load applied via the head portion 24 exceeds a predetermined value, the constricted portion is formed. The structure is such that the head 26 is separated from the screw portion 22 by breaking the head 26.
[0026]
Further, the head 24 is formed with a spring piece 28 which cuts off a part of the side wall and extends toward the tip end side of the head 24 so as to expand and contract in the radial direction of the head 24.
[0027]
On the other hand, a support boss 30 is formed on the bottom wall of the main body base 12A corresponding to the fastening bolt 20 having the above configuration, and the support boss 30 is formed on the main body cover 12B when the main body cover 12B is mounted. The corresponding guide bosses 32 are formed, and the fastening bolts 20 are screwed into the screw holes 34 and the screw holes 36 of the guide boss portion 32 and the support boss portion 30, so that the main body base 12A and the main body cover 12 are formed. 12B is configured to be fastened and fixed.
[0028]
In this case, the circuit board 18 slidably inserted into the board slide groove 14 of the main body base 12A and accommodated in the main body base 12A has fastening bolts 20 corresponding to the screw holes 34 and the screw holes 36. A penetrating hole is formed, and the circuit board 18 is integrally fixed by passing the fastening bolt 20 through the through hole.
[0029]
Further, a locking portion 38 is formed on the guide boss portion 32 provided on the main body cover 12B. The locking portion 38 corresponds to the spring piece 28 formed on the head portion 24 of the fastening bolt 20, and is formed by partially expanding the diameter of the screw hole 34. When the screw portion 22 of the fastening bolt 20 is screwed into the screw hole 34 and the screw hole 36 of the guide boss portion 32 and the support boss portion 30 and the head portion 24 reaches the locking portion 38, the spring piece 28 opens outward. The head 24 is prevented from slipping out toward the main body cover 12B (toward the main body cover insertion side of the fastening bolt 20).
[0030]
Further, a slit portion 40 is formed on the back surface side of the support boss portion 30 provided on the main body base 12A so as to correspond to the screw hole 36 as shown in FIG. By cutting off the slit portion 40, the fastening bolt 20 screwed into the screw hole 36 can be operated from the back side of the main body base 12A.
[0031]
The fastening positions of the main body base 12A and the main body cover 12B by the fastening bolts 20 having the above configuration, that is, the screw holes 34 and the screw holes 36 of the guide boss portion 32 and the support boss portion 39 are provided at a plurality of positions (in the present embodiment, , Four locations).
[0032]
Next, the operation of the present embodiment will be described.
[0033]
In the pachinko gaming machine 10, the circuit board 18 on which electronic components such as a ROM for controlling the electric accessory unit are mounted is protected by a circuit board 18 for protecting the electronic components from contact with other conductive components and the like and impact. It is covered by the case 12.
[0034]
That is, the circuit board case 12 is composed of the main body base 12A and the main body cover 12B, and the circuit board 18 is slid and inserted along the board slide groove 14 of the main body base 12A to house the circuit board 18 in the main body base 12A. The main body cover 12B is slidably inserted along the cover slide groove 16 of the main body base 12A to be in a mounted state. Thereafter, as shown in FIG. 4A, fastening bolts are inserted into the screw holes 34 of the guide bosses 32 formed on the main body cover 12B and the screw holes 36 of the support boss portions 30 formed on the main body base 12A. 20 is inserted and screwed.
[0035]
When the fastening bolt 20 is screwed in and the head 24 reaches the locking portion 38, the spring piece 28 opens outward and engages with the locking portion 38, as shown in FIG. The head 24 is prevented from slipping out (toward the body bolt insertion side of the fastening bolt 20). Therefore, in this state, even if the head 24 of the fastening bolt 20 is operated (rotated in the reverse direction) to try to pull it out toward the main body cover 12B, this cannot be performed.
[0036]
When the head 24 is further screwed from the state in which the spring piece 28 is opened outward and engaged with the locking portion 38, a small diameter constriction is formed between the screw portion 22 and the head 24 (continuous portion). When the torsional load applied to the portion 26 via the head portion 24 exceeds a predetermined value, the constricted portion 26 is broken and the head portion 24 is separated from the screw portion 22 (the state shown in FIG. 4C). ). As a result, the main body base 12A and the main body cover 12B are fastened and fixed by the fastening bolts 20, and even if the circuit board case 12 is illegally operated from outside by a driver or the like that is sufficiently heated to melt. , The screw portion 22 that substantially fastens the main body base 12A and the main body cover 12B cannot be operated.
[0037]
Furthermore, in this circuit board case 12, the circuit board 18 itself is held by the fastening bolts 20 by passing the fastening bolts 20 for fastening the main body base 12A and the main body cover 12B through the circuit board 18, so that the circuit board 18 It can be more securely sealed in the substrate case 12.
[0038]
The circuit board case 12 in which the circuit board 18 is sealed in such a state is shipped from a manufacturing factory and attached to the back of the pachinko gaming machine 10 as shown in FIG.
[0039]
Here, in the circuit board case 12 attached to the pachinko gaming machine 10, that is, when the main body base 12A and the main body cover 12B are fixed, the main body base 12A and the main body cover 12B are fastened by the fastening bolts 20. In addition, the spring piece 28 formed on the head 24 of the fastening bolt 20 is engaged with the engaging portion 38 provided on the main body cover 12B by expanding the diameter thereof. 24 is separated from the screw portion 22 by being screwed off. Therefore, even if the circuit board case 12 is illegally operated by a driver or the like that has sufficiently heated the melting of the circuit board case 12 from outside, the fastening bolt 20 is blocked by the head 24 and the main body base 12A and the main body cover 12B are substantially separated from each other. The screw portion 22 which is temporarily fastened cannot be operated, so that unauthorized modification of the circuit board 18 sealed in the circuit board case 12 can be prevented.
[0040]
Further, here, in such a pachinko gaming machine 10, the inspection of the circuit board 18 is required. Therefore, when inspecting the circuit board 18, it is necessary to separate the body cover 12 </ b> B from the body base 12 </ b> A of the circuit board case 12 and remove the circuit board 18.
[0041]
In this case, the slit portion 40 formed on the back surface side of the support boss portion 30 of the main body base 12A is cut off so as to face the tip portion of the fastening bolt 20 (screw portion 22), that is, corresponding to the screw hole 36. . Thereby, the screw portion 22 of the fastening bolt 20 screwed into the screw hole 36 is exposed, and the screw portion 22 can be operated from the back side of the main body base 12A. Therefore, by pulling out the screw portion 22 of the fastening bolt 20 to the back side of the main body base 12A, the fastening and fixing between the main body base 12A and the main body cover cover 32B by the fastening bolt 20 (screw portion 22) is released, and the circuit board 18 is removed. Can be removed.
[0042]
After the inspection of the circuit board 18 is completed, the circuit board 18 is slid again along the board slide groove 14 of the main body base 12A in the same manner as described above in order to protect the circuit board 18 again by the circuit board case 12. The circuit board 18 is accommodated and supported in the main body 12A, and further, the main body cover 12B is slid and inserted along the cover slide groove 16 of the main body base 12A to be in a mounted state. Thereafter, the bolt is re-fixed to another new screw hole 34 of the guide boss 32 and another new screw hole 36 of the support boss 30 by using a new fastening bolt 20.
[0043]
By repeating the above procedure, the main body base 12A and the main body cover 12B can be opened three times and fixed four times.
[0044]
Furthermore, the main body cover 12B is separated from the main body base 12A to perform a recycling process after using the pachinko gaming machine 10 and the circuit board case 12 (the main body base 12A, the main body cover 12B and the circuit board 18), and the covering of the circuit board 18 is released. In this case, if the fastening bolt 20 made of resin is crushed by a tool K such as a drilling machine as shown in FIG. 6, the main body cover 12B is easily separated from the main body base 12A and the circuit board 18 is separated. Can be removed.
[0045]
In this case, since the main body cover 12B and the main body base 12A can be separated and the circuit board 18 can be removed simply by crushing the fastening bolt 20, this recycling work does not take time and the cost of the recycling process is reduced. Can be achieved. Furthermore, if the fastening bolts 20 (heads 24) are formed of the same resin material as the main body cover 12B and the main body base 12A, the separated heads 24 can be used together with the main body cover 12B and the main body base 12A without intentionally removing them. Can be recycled.
[0046]
As described above, in the circuit board case 12 of the pachinko gaming machine 10 to which the sealing structure according to the present embodiment is applied, the illegal operation of the circuit board 18 sealed in the circuit board case 12 including the main body base 12A and the main body cover 12B. In addition to preventing remodeling, recycling after use can be easily performed, and the cost of recycling can be reduced.
[0047]
【The invention's effect】
As described above, the present invention has the following effects.
[0048]
The circuit board case sealing structure according to the first aspect of the present invention can prevent not only unauthorized modification of the circuit board enclosed in the circuit board case including the main body base and the main body cover, but also a recycling process after use. This can be easily performed, and the cost of recycling can be reduced.
[0049]
In the circuit board case sealing structure according to the second aspect of the present invention, since the circuit board itself is also held by the fastening bolt, the circuit board can be more securely sealed in the circuit board case.
[0050]
In the circuit board case sealing structure according to the third aspect of the present invention, by setting in advance a necessary number of fastening portions with fastening bolts, unauthorized opening can be prevented, and the body base and the body cover can be prevented when necessary. Can be separated a plurality of times to make the circuit board uncovered.
[Brief description of the drawings]
FIG. 1 is a rear view of a pachinko gaming machine to which a circuit board case sealing structure according to an embodiment of the present invention is applied.
FIG. 2 is a schematic perspective view showing an entire configuration of a circuit board case to which a circuit board case sealing structure according to an embodiment of the present invention is applied;
FIG. 3 is a three-view drawing of a fastening bolt applied to the circuit board case sealing structure according to the embodiment of the present invention;
FIG. 4 is a sectional view showing a procedure for fixing a fastening bolt applied to the circuit board case sealing structure according to the embodiment of the present invention.
FIG. 5 is a plan view of a slit portion applied to the sealing structure of the circuit board case according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a procedure for recycling a fastening bolt applied to the circuit board case sealing structure according to the embodiment of the present invention.
[Explanation of symbols]
10 Pachinko gaming machine 12 Circuit board case 12A Body base 12B Body cover 18 Circuit board 20 Fastening bolt 22 Screw part 24 Head 26 Neck part 28 Spring piece 30 Support boss part 32 Guide boss part 34 Screw hole 36 Screw hole 38 Stop 40 Slit

Claims (3)

A circuit board case sealing structure for protecting a circuit board provided with a plurality of electronic components attached to the gaming machine and electronically controlling the game content,
A main body base supporting the circuit board,
A mounting state fixed to the main body base to cover and protect the circuit board, and a main body cover that can take an uncovered state in which the circuit board is uncovered,
A screw portion and a head formed integrally with the screw portion and having a spring piece that is separable from the screw portion and expands / contracts in the radial direction, and is inserted from the main body cover toward the main body base. Combined , fastening bolts made of the same resin material as the main body base and the main body cover ,
Wherein in response to the spring piece of the fastening bolt is provided in the fastening bolt screw hole of the body cover, wherein the exit to prevent the head towards the spring piece to the fastening bolt body cover insertion side by engaging A retaining portion that remains in the fastening bolt screw hole .
The main body base and the main body cover are fastened by the fastening bolts, the spring piece is enlarged in diameter and locked to the locking portion, and the head is twisted off from the screw portion and separated. Then, the main body base and the main body cover are fixed.
A sealing structure for a circuit board case, characterized in that: The sealing structure for a circuit board case according to claim 1, wherein the fastening bolts, which fasten the body base and the body cover, penetrate and fix the circuit board. A plurality of fastening positions of the body base and the body cover by the fastening bolts are provided, and
The main body base and the main body cover are provided with a slit portion capable of operating the fastening bolt by cutting off the main body base opposed to the distal end portion of the fastening bolt in a fastened state,
When the main body cover is separated from the main body base and the circuit board is uncovered, the screw part of the fastening bolt is pulled out to the side of the main body base by cutting out the slit part, and the fastening bolt is used. Release the fastening and fixation,
Each time the fastening is released, it is sequentially re-fixed at a new fixing point,
The sealing structure for a circuit board case according to claim 1 or 2, wherein:

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