JP4322416B2 - On-board device for automatic toll collection system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle device for an automatic toll collection system in which payment of toll fees such as toll roads and toll parking lots is performed based on wireless communication with a fixed station communication device installed corresponding to the facility concerned. .
[0002]
[Problems to be solved by the invention]
In recent years, an automatic toll collection system (ETC (Electronic Toll Collection) system) has been developed that automatically collects tolls on toll roads without stopping the vehicle. In this system, information stored in an IC card (information recording medium) mounted on the vehicle-mounted device side between the fixed station communication device (roadside wireless device) installed at the toll gate and the vehicle-mounted device mounted on the vehicle. Is configured to perform two-way wireless communication based on the communication and automatically pay a fee by the communication. In addition, the on-vehicle device is provided with a switch as an external input unit, and when this switch is operated, a payment history and a balance status are displayed.
[0003]
By the way, the vehicle-mounted device includes an electronic circuit board for performing wireless communication and various controls inside the main body case, and further includes an insertion / removal port for the IC card and the switch in the main body case. Yes.
[0004]
In such an on-board device for an automatic fee collection system, there are many opportunities for the user to touch the on-vehicle device, such as the insertion / removal of the IC card and the switch operation described above. In this case, when the user is charged, it may be discharged to the mounted component of the electronic circuit board of the vehicle-mounted device. For this reason, countermeasures against static electricity are required for in-vehicle devices.
[0005]
As countermeasures against static electricity, the electronic circuit board is separated from the mouth portion of the IC card and the switch, but there is a problem that the size of the main body case becomes large. In particular, considering that this vehicle-mounted device is often installed on a dashboard in a vehicle, the increase in size obstructs the forward view and is not preferable.
[0006]
The present invention has been made in view of the above circumstances, and an object thereof is to provide an in-vehicle device for an automatic toll collection system that can increase resistance to static electricity without increasing the size.
[0007]
[Means for Solving the Problems]
According to the vehicle-mounted device for the automatic toll collection system according to claim 1, when the user charged with static electricity is folded when the information recording medium is inserted or removed, or when the external input unit is operated, the charged charge of the user is charged. Is discharged to the case side conductor, and is discharged from the case side conductor to the vehicle ground through the board side conductor and the ground wiring. Therefore, it is possible to prevent the mounted components of the electronic circuit board from being affected by static electricity, and to improve resistance to static electricity. Furthermore, it is not necessary to increase the distance between the main body case and the electronic circuit board, and it is possible to prevent the main body case from increasing in size and the overall size.
[0008]
According to the on-vehicle device for the automatic toll collection system of claim 2, when the positioning protrusion and the positioning hole for positioning the lower case portion and the upper case portion constituting the main body case are fitted, both cases The case-side conductor portion on the inner surface of the lower case portion and the case-side conductor portion of the upper case portion are naturally conducted, and the case-side conductor portions of the lower case portion and the upper case portion are connected to the entire inner surface. As a result, the static electricity resistance can be improved while effectively using the positioning protrusion and the positioning hole.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The main body case 1 is composed of a lower case portion 2 and an upper case portion 3 made of, for example, ABS resin. An IC card (information recording medium) 4 (FIG. 1) is provided on the front plate portion of the lower case portion 2. , See FIG. 3), a horizontally long mouth portion 5 for insertion and removal is formed. Further, a positioning projection 6 that rises in a plate shape upward is integrally formed on the upper portion of the mouth portion 5 of the lower case portion 2, and further, as shown in FIG. , Screw insertion bosses 7 and 7 are formed.
[0010]
In this lower case 2, the entire inner surface including the upper portion of the mouth portion 5 near the mouth portion, the surface of the positioning projection 6 and the surface of the screw insertion boss portions 7 and 7 is made of, for example, Cu—Ni electroless plating. A side conductor 8 is provided.
[0011]
A panel plate 9 is integrally attached to the front portion of the upper case 3, and the panel plate 9 is provided with a display window 10 made of a transparent material, and serves as an external input unit. Switches 11 and 12 are provided. Further, a positioning hole 13 is formed at the front lower portion of the upper case portion 3 so as to correspond to the protrusion 6. In addition, although not shown, a screw threaded boss portion is formed in a portion corresponding to the screw insertion boss portions 7 and 7 in the upper case portion 3.
In the upper case 3, the entire inner surface including the rear surface of the panel plate portion 9 (excluding the rear surface of the display window 10) in the vicinity of the switch, the inner surface of the positioning hole 13 and the surface of the screw threaded boss portion is formed, for example Another case-side conductor portion 14 made of electroless plating is provided.
Here, the screw insertion boss portions 7 and 7 and a screw screw boss portion (not shown) are the electronic circuit board contact portions in the main body case 1, as will be apparent from the description below. An electronic circuit board 15 for performing wireless communication and various controls is provided inside the main body case 1, and a large number of electronic component groups 16 are mounted on the electronic circuit board 15. The electronic circuit board 15 is formed with screw holes 17 and 17 at portions corresponding to the screw insertion bosses 7 and 7, and the electronic circuit board 15 has an upper surface formed with screw holes 17 and 17. A board-side conductor 18 is attached in a form to connect 17, and the board-side conductor 18 is also formed from the inner peripheral surface to the lower surface of the screw-through holes 17, 17.
[0012]
Furthermore, a ground wiring 19 is connected to the board-side conductor 18, and the ground wiring 19 is connected to the vehicle ground. The other wiring 20 is for power supply, and the other wiring 21 is for accessories (ACC).
[0013]
The lower case part 2, the upper case part 3 and the electronic circuit board 15 are assembled as follows.
The screw holes 17 and 17 of the electronic circuit board 15 are sandwiched between a screw insertion boss portion 7 of the lower case portion 2 and a screw screw boss portion (not shown) of the upper case portion 3, and the positioning projection 6 Is inserted into the positioning hole 13 and the screws 22 and 22 are screwed to the screwing bosses (not shown) through the screw insertion bosses 7 and 7 and the screw through holes 17 and 17. Thereby, the main body case 1 is assembled and the electronic circuit board 15 is disposed inside. In this case, the conductor portion 8 of the lower case portion 2 and the conductor portion 14 of the upper case portion 3 are in contact with each other at the abutting portion of both case portions. In particular, the positioning protrusion 6 and the positioning hole 13 are fitted to each other. Contact is made reliably at the joint and a reliable conduction state is obtained. And these conductor parts 8 and 14 are in contact with the threading hole 17 part (circuit side conductor part 18 part) of the circuit board 15 through the screw insertion boss part 7 and the screw threading boss part, and are conducted. .
[0014]
The in-vehicle device A for an automatic toll collection system configured as described above is attached to a dashboard or the like in a vehicle as shown in FIG. 5, and is a fixed station communication device (roadside radio device) installed at a toll gate. And two-way wireless communication based on the stored information in the IC card 4 attached to the vehicle-mounted device A, and automatically pay the fee by the communication. Yes. When the switches 11 and 12 are operated, the payment history and the balance status are displayed on a display device (not shown) disposed on the back side of the display window 10.
[0015]
In this embodiment, when the user charged with static electricity inserts or removes the IC card 4 or operates the switches 11 and 12, the user's charged charge is supplied to the case-side conductor 8. Or it discharges to 14, and is discharged | emitted from this case side conductor part 8 or 14 to the vehicle ground through the board | substrate side conductor part 18 and the earth wiring 19. FIG. Therefore, it is possible to prevent the mounted parts of the electronic circuit board 15 from being affected by static electricity, and to improve resistance to static electricity. Furthermore, it is not necessary to increase the distance between the main body case 1 and the electronic circuit board 15, and the main body case 1 can be prevented from being increased in size and the entire size.
[0016]
In particular, when the positioning protrusion 6 and the positioning hole 13 are fitted, the lower case portion 2 and the upper case portion 3 are positioned, and the case side conductor portion 8 and the upper case portion 3 of the lower case portion 2 are positioned. The case-side conductor part 14 is surely electrically connected. As a result, it is possible to improve static electricity resistance while effectively using the positioning protrusion 6 and the positioning hole 13.
[0017]
The external input unit may be a touch panel switch instead of a simple switch. The positioning protrusion may be provided in the upper case portion, and the positioning hole portion may be provided in the lower case portion. Further, the case-side conductor portion may be provided not only on the case inner surface side but also on the outer surface.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a vehicle-mounted device showing an embodiment of the present invention. FIG. 2 is an external view of the vehicle-mounted device. FIG. 3 is a longitudinal side view of a front portion of a main body case. [Fig. 5] Perspective view of a state where the vehicle-mounted device is attached to the vehicle [Explanation of symbols]
1 is a main body case, 2 is a lower case portion, 3 is an upper case portion, 4 is an IC card (information recording medium), 5 is a mouth portion, 6 is a positioning protrusion, 7 is a screw insertion boss portion (electronic circuit board contact portion) ), 8 is a case side conductor, 11 and 12 are switches (external input units), 13 is a positioning hole, 14 is a case side conductor, 15 is an electronic circuit board, and 19 is a ground wiring.

Claims (2)

The main body case is equipped with an electronic circuit board for performing wireless communication and various controls, and the main body case is equipped with an information recording medium insertion / extraction port and an external input unit, and is installed corresponding to a pay facility. In the in-vehicle device for the automatic fee collection system that performs wireless communication with the fixed station communication device, and automatically withdraws the facility usage fee from the information storage medium,
From the inner surface near the mouth of the main body case and the inner surface near the external input portion, to the electronic circuit board contact portion in the main body case, a case side conductor is provided,
A board-side conductor portion that is electrically connected to the case-side conductor portion is provided on the electronic circuit board,
A vehicle-mounted device for an automatic toll collection system, wherein a ground wiring connected to a vehicle ground is connected to the board-side conductor. The body case is composed of a lower case part and an upper case part,
A positioning protrusion is formed on one of the lower case part and the upper case part, and a positioning hole is formed on the other to fit the positioning protrusion and determine the position of the lower case part and the upper case part. And
2. The automatic fee collection according to claim 1, wherein the case-side conductor is formed on the entire inner surface of the case including the positioning protrusion surface and the entire inner surface of the case including the inner peripheral surface of the positioning hole. On-board device for system.

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