JP4073067B2 - Box locking mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking body for locking a substrate storage box storing a circuit board of a pachinko machine, and a box locking mechanism using the same.
[0002]
[Prior art]
Since the program for determining the winning rate of the pachinko machine is written in the ROM, there has been a case where an illegal ROM is obtained by illegally replacing the regular ROM with a modified ROM. For this reason, recently, a circuit board including a ROM is stored in a board storage box, and the ROM is not exchangeable unless the lid of the box is destroyed. Many patents have already been filed.
[0003]
Many of the conventional box locking mechanisms of this type are such that when the locking pin set in the locking body storage portion of the substrate storage box closes the lid, it pops upward by elastic means and locks on the back surface of the lid. The structure is such that the lid cannot be opened unless it is engaged with the retaining pin engaging hole and then the lid is broken and the locking pin is removed. However, the conventional box locking mechanism is not suitable for new tricks such as breaking the locking body storage part of the board storage box from the back, pulling the locking pin downward, opening the lid and replacing the internal ROM. It turned out to be ineffective.
[0004]
[Problems to be solved by the invention]
The present invention solves the above-described conventional problems, and prevents the lid from being opened even if the locking body storage portion of the substrate storage box is broken from the back surface, and a box locking mechanism using the same. It was made to provide.
[0005]
[Means for Solving the Problems]
A box locking mechanism made to solve the above problem is a locking mechanism comprising a locking pin and a locking claw for locking a lid body in a non-slidable manner to a board storage box in which a circuit board is housed. A box locking mechanism using the body,
The board storage box has a bottomed cylindrical locking body storage part on the side part,
The lid has a locking pin engagement hole on the back surface,
The locking pin has a head that is fitted into the locking pin engaging hole, and can be ejected upward when stored in the locking body storage portion.
When the lid is slid and closed, the locking claw is pushed together with the locking pin into the locking body housing portion against the upward impact and together with the locking pin when the lid is slid and closed. The tip of the locking claw is protruded laterally from the head of the locking pin and is engaged with the upper edge of the locking body housing portion, and the locking pin cannot be taken out downward. It is what makes it possible .
[0006]
According to the present invention, even if the locking body storage portion of the substrate storage box is broken from the back surface, the locking claw is engaged with the upper edge of the locking body storage portion, so that the locking claw is pulled out downward. And therefore the locking pin at the top cannot be pulled down. For this reason, the lock pin can be pulled out only from the lid side, and it is possible to counter the new trick of breaking the lock body storage part from the back surface and illegally replacing the ROM.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 is an exploded perspective view of the locking body of the present invention, and FIG. 2 is a plan view and sectional views of each part. 3 to 5 are cross-sectional views of the main part of a box locking mechanism using the locking body of the present invention.
[0008]
As shown in these drawings, the locking body of the present invention includes a locking pin 1 and a locking claw 2. The locking pins 1 are cylindrical, and deep vertical grooves 3 are formed on both side surfaces excluding the head 1a. A step portion 4 is formed in the lower portion of the vertical groove 3. A round hole 5 is formed from the bottom surface of the locking pin 1, and an elastic means 6 is accommodated therein. In addition, a protrusion 7 for projecting and fixing the upper portion of the elastic means 6 is provided at the center of the round hole 5.
[0009]
As shown in FIG. 3, the locking body of the present invention is stored in a bottomed cylindrical locking body storage portion 9 formed in a side portion of the substrate storage box 8. When the lower end of the elastic means 6 is in contact with the inner bottom surface of 9, the locking pin 1 is always repelled upward. Therefore, when the lid 10 is closed as shown in FIG. 5, the head 1 a of the locking pin 1 fits into the locking pin engaging hole 11 formed on the back surface of the lid 10, and the lid 10 Can be locked so that it cannot slide.
[0010]
In this embodiment, the locking claw 2 is fitted into the vertical groove 3 on both side surfaces of the locking pin 1 from the lower side, and has the same outer diameter as the locking pin 1 as shown in FIG. Two flexible portions 13 are integrally formed at both ends of a ring-shaped portion 12 having a diameter to form a U shape as a whole. The central hole of the annular portion 12 is for passing the elastic means 6.
[0011]
In the middle of the two flexible portions 13, a holding claw 14 that engages with a stepped portion 4 formed in the longitudinal groove 3 of the locking pin 1 protrudes. Since the upper surface of the holding claw 14 is an inclined surface and the lower surface is perpendicular to the inner surface of the flexible portion 13, the locking claw 2 is inserted into the vertical grooves 3 on both side surfaces of the locking pin 1 from below. When fitted, the holding claw 14 engages with the stepped portion 4 while the flexible portion 13 expands outward to be integrated.
[0012]
Further, the distal end portions 15 of the two flexible portions 13 of the locking claw 2 project outward from the side surface of the locking pin 1 when no external force is applied, but fit into the longitudinal groove 3 by applying an external force. Be able to.
[0013]
As shown in FIGS. 3 to 5, the box locking mechanism according to claim 2 is configured such that the above-described locking body is attached to a bottomed cylindrical locking body storage portion 9 formed in a side portion of the substrate storage box 8. It is what was stored. As described above, the locking claw 2 protrudes outward from the side surface of the locking pin 1, so that the locking claw 2 is pushed into the vertical groove 3 below the head 1 a of the locking pin 1 from the side. The locking body is stored in the locking body storage section 9. In this box locking mechanism, the lid 10 needs to be configured to be fitted into the substrate storage box 8 by sliding from a specific direction indicated by an arrow in FIG. For this reason, the lid body 10 is closed while pushing the locking body against the elastic means 6 as shown in FIG.
[0014]
When the lid 10 is completely closed in this way, the locking body is pushed up by the elastic means 6, and the head 1 a of the locking pin 1 is inserted into the locking pin engaging hole 11 formed on the back surface of the lid 10. Fit. At the same time, the latching claw 2 is also pushed up, and its tip 15 expands outward and engages with the upper edge of the locking body housing 9, and projects laterally from the head 1 a of the locking pin 1. In this state, the locking pin 1 can no longer be pushed downward. As described above, the lid body 10 is of a slide type, but since the head 1a of the locking pin 1 locks the slide of the lid body 10, the locking body formed on the lid body 10 thereafter. The cover 10 cannot be opened unless the cover 16 is broken and the locking body is removed from the locking body storage 9.
[0015]
Further, the elastic means 6 can be removed even if a hole is made in the bottom surface of the locking body storage portion 9 by a drill or the like from the back surface of the board, but the tip 15 of the locking claw 2 is attached to the locking body storage portion 9. Since the upper edge is engaged, the lock cannot be taken out downward. Moreover, since the lid 10 is provided, it is of course impossible to take out the locking body upward. Therefore, the box locking mechanism of the present invention has an effect that the lock of the lid body 10 cannot be broken even if the locking body storage portion 9 is broken from the back surface.
[0016]
At the time of inspection by the police after shipment from the manufacturer, the lock body cover 16 formed on the lid body 10 is broken and the lock body is taken out from the lock body storage portion 9, and after the inspection is completed. What is necessary is just to move a lock body to another lock body accommodating part 9, and to close the cover body 10 again as mentioned above.
[0017]
【The invention's effect】
As described above, according to the present invention, the lid can be reliably locked, and the lid cannot be opened even if the lock body storage portion of the substrate storage box is broken from the back surface. For this reason, there is an advantage that an authorized ROM cannot be illegally replaced with a modified ROM.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a locking body of the present invention.
FIG. 2 is a plan view and a cross-sectional view of each part of the locking body of the present invention.
FIG. 3 is a cross-sectional view of the main part of the box locking mechanism of the present invention, showing a state in which a lid is opened.
FIG. 4 is a cross-sectional view showing a state in which a lid is about to be closed.
FIG. 5 is a cross-sectional view showing a state where a lid is closed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Locking pin 1a Locking pin head 2 Locking claw 3 Vertical groove 4 Step part 5 Round hole 6 Elastic means 7 Protrusion 8 Substrate storage box 9 Locking body storage part 10 Lid 11 Locking pin engagement hole 12 Annular part 13 Flexible part 14 Holding claw 15 Tip part 16 Locking body cover

Claims (1)

A box locking mechanism using a locking body composed of a locking pin and a locking claw for locking the lid in a non-slidable manner to a board storage box in which a circuit board is stored.
The board storage box has a bottomed cylindrical locking body storage part on the side part,
The lid has a locking pin engagement hole on the back surface,
The locking pin has a head that is fitted into the locking pin engaging hole, and can be ejected upward when stored in the locking body storage portion.
When the lid is slid and closed, the locking claw is pushed together with the locking pin into the locking body housing portion against the upward impact and together with the locking pin when the lid is slid and closed. The tip of the locking claw is protruded laterally from the head of the locking pin and is engaged with the upper edge of the locking body housing portion, and the locking pin cannot be taken out downward. A box locking mechanism characterized by being made possible .

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