JPH0817277B2 - Printed circuit board unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board unit having a back wiring board on which a plurality of different types of printed wiring boards are mounted.

[0002]

2. Description of the Related Art Conventionally, in this type of printed circuit board unit, since the input / output interface is different depending on the type of printed circuit board, the connector for connecting the printed circuit board and the back wiring board is also different depending on the type of printed circuit board. It was Therefore, the type and arrangement of the printed circuit board connected to the back wiring board are fixed, and even if there is an empty space on the back wiring board, only the predetermined type of printed circuit board can be mounted.

Therefore, in order to improve the mounting efficiency of the printed circuit board, a printed circuit board unit as shown in FIG. 4 has been proposed. In FIG. 4, on the back wiring board 61 provided on the shelf 60, only bus wiring patterns and power supply patterns common to a plurality of types of printed boards are wired. Further, a plurality of front connectors 62 for mounting the printed circuit board 50 are provided on the front surface of the back wiring board 61, and a plurality of rear surface connectors 63 for mounting the rear surface printed circuit board 70 on the back surface of the back wiring board 61. It is provided. Then, a dedicated wiring pattern unique to the type of the printed circuit board 50 is drawn out via the rear surface connector 63 and the rear surface printed circuit board 70 and connected by an external cable 71 (see Japanese Patent Laid-Open No. 2-158198). ).

[0004]

However, in the conventional printed circuit board unit shown in FIG. 4, the printed circuit board is mounted on the front connector at an arbitrary position among the front connectors on the back wiring board regardless of its type. Although it has the advantage of improving the mounting efficiency of the printed circuit board, the back side connector is the same regardless of the type of printed circuit board, so the back side printed circuit board can be mounted on the back side connector at any position on the back wiring board. There is a possibility that the back side printed circuit board may be erroneously mounted. If the back side printed circuit board is erroneously mounted, not only the system will not function properly, but in the worst case, the system may be destroyed.

Therefore, an object of the present invention is to provide a printed circuit board unit which can mount a printed circuit board on a connector at an arbitrary position on a back wiring board and prevent erroneous mounting on the back surface side.

[0006]

In order to achieve the above object, a printed circuit board unit of the present invention has a back wiring board on which a plurality of different types of printed circuit boards are mounted on the surface via connectors, respectively. In the printed circuit board unit, only the wiring common to the printed circuit board is connected to the back wiring board, and the dedicated wiring unique to each printed circuit board is connected to the connection means mounted on the back surface of the back wiring board. Is a common wiring connector that connects only the common wiring between each printed circuit board and the back wiring board, and the back wiring board has a plurality of wiring wiring boards corresponding to the mounting positions of the respective printed circuit boards. Through-holes are formed on each printed circuit board, and the dedicated wiring is A pin is provided which is provided with a connected dedicated wiring connector, is adjacent to the dedicated wiring connector, and penetrates the through hole when mounted on the back wiring board and is exposed on the back surface of the back wiring board. Is provided at a predetermined position different for each type of the printed circuit board, the connection means is provided with a connection portion to be connected to the dedicated wiring connector, and the hole into which the pin is inserted is provided in each of the above. It is characterized in that it is provided at a predetermined position so as to have a one-to-one correspondence with the same type of printed circuit boards among the printed circuit boards. Further, each of the printed circuit boards may be provided with a plurality of the pins, and the connecting means may be provided with the same number of the holes as the corresponding pins of the printed circuit board. In this case, a structure having a connection terminal inside the hole
It can also be achieved.

[0007]

In the printed circuit board unit of the present invention configured as described above, only the wiring common to various printed circuit boards is connected to the back wiring board, and the printed circuit board is connected to the back wiring board through the common wiring connector. To be implemented. On the other hand, the dedicated wiring connector to which the dedicated wiring unique to the printed circuit board is connected is not connected to the back wiring board. Therefore, the wiring connected to the back wiring board is only the wiring common to the type of the board, and the printed board can be mounted at any position regardless of the type.

The dedicated wiring connector is connected to the connecting portion of the connecting means. At this time, the pin provided adjacent to the dedicated wiring connector penetrates the back wiring board and is exposed on the back surface thereof, but the pin and the terminal are
Setting at a predetermined position according to the type of each PCB vignetting, the printed circuit board and the connecting means connected thereto 1
Since the correspondence is one-to-one, there is no erroneous mounting of the connecting means.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a printed circuit board unit according to the present invention, and FIG. 2 is a sectional view of a main part of the printed circuit board unit shown in FIG. As shown in FIGS. 1 and 2, the printed circuit board unit is a printed circuit board 1
0, the shelf 20, and a connection cable 30 as a connecting means.

The printed circuit board 10 includes a common wiring connector 11 in which wirings common to a plurality of types of printed circuit boards (for example, common bus wiring and power supply wiring) are wired, and dedicated wiring unique to the printed circuit boards of the same type. (For example, various input / output interfaces such as a network interface and a device interface) are provided and a dedicated wiring connector 12 is provided. Further, a pin 13 is provided adjacent to the dedicated wiring connector 12.

The pins 13 are provided in a predetermined number and in a predetermined position according to the type of the printed circuit board 10. For example, in the printed circuit board 10 of this embodiment, as shown in FIG. Are four locations A, B, C, D,
Pins 13 are provided at positions A, B, and D among them. Further, the length of the pin 13 is such a length that when the printed circuit board 10 is mounted on the back wiring board 21, the pin 13 penetrates the through hole 25 of the back wiring board 21 and is exposed on the back surface of the back wiring board 21.

On the other hand, a back wiring board 21 having a bus pattern and a power supply wiring pattern common to a plurality of types of printed boards is attached to the shelf 20, so that a plurality of printed boards 10 can be mounted. There is. Therefore, the slot of the shelf 20 (not shown)
Depending on the position, on the surface (the surface on the left side in FIG. 2) of the back wiring board 21, a common wiring connector 22 connected to the common wiring connector 11 of the printed circuit board 10 and a dedicated wiring connector of the printed circuit board 10 respectively. A plurality of front surface side dedicated wiring connectors 23 to be connected to the front surface 12 are provided. Back wiring board 21
The common wiring connector 22 is used to electrically connect the printed wiring board 10 and the back wiring board 21 via the common wiring connector 11 of the printed wiring board 10.

Further, on the back surface of the back wiring board 21, at the positions corresponding to the respective front surface side dedicated wiring connectors 23, there are provided back surface side dedicated wiring connectors 24 for mounting respective back surface connectors 31 described later. There is.
Each back side dedicated wiring connector 24 is directly connected to each front side dedicated wiring connector 23 without interposing the wiring of the back wiring board 21. Further, on the side of each of the dedicated wiring connectors 23 and 24 of the back wiring board 21, the printed circuit board 1 is provided.
Four through holes 25 are formed in correspondence with the positions of the 0 pins 13. Accordingly, when the printed circuit board 10 is inserted into the shelf 20 and mounted on the back wiring board 21, the pins 13 penetrate the through holes 25 and are exposed on the back surface of the back wiring board 21.

The connection cable 30 is for connecting an external device (not shown) to the printed circuit board unit, and has a back surface connector 31 mounted on the back wiring board 21 at one end thereof. There is. As shown in FIG. 3, the rear surface connector 31 has a connecting portion 32 connected to the rear surface side dedicated wiring connector 24 (see FIGS. 1 and 2) and the pin 13 of the printed circuit board 10 (see FIGS. 1 and 2).
And a pin insertion terminal 33 which is a hole into which the reference (see) is inserted. Inside the pin insertion terminal 33, the pin 13
A terminal (not shown) that connects to the pin 13 when inserted
Have. The pin insertion terminals 33 are provided so as to have a one-to-one correspondence with the layout and the number of one type of printed circuit board. In the present embodiment, among the four placement positions A, B, C, and D. , A, B, D are provided with pin insertion terminals 33. As a result, the rear surface connector 3 shown in FIG.
1 can be connected only to the printed circuit board 10 shown in FIGS. 1 and 2, and cannot be connected to other types of printed circuit boards.

For example, as the printed circuit board 10, four types shown in Table 1 are set.

[0017]

[Table 1] In Table 1, the printed board of a shows that the pins 13 are arranged at the positions A, B, and C, and the pins 13 are not arranged at the position D.

On the other hand, as the rear surface connector 31, four types shown in Table 2 are set.

[0019]

[Table 2] Also in Table 2, as in Table 1, the rear surface connector 31 of a '
Has pin insertion terminals 33 at positions A, B and C, and D
The position where the pin insertion terminal 33 is not provided is shown.

By setting the positions of the pin 13 and the pin insertion terminal 33 as shown in Tables 1 and 2, a and a ', b and b', c and c ', d and d'are obtained, respectively. In addition, the printed circuit board 10 and the backside connector 31 are completely
Correspond to one by one.

As described above, since the printed circuit board 10 and the back wiring board 21 are connected only to the wiring common to a plurality of types of printed circuit boards, the mounting conditions of the printed circuit board 10 depend on the type of the printed circuit board 10. Without equality. As a result, the printed circuit board 10 can be mounted at any position on the back wiring board 21, and the mounting efficiency of the printed circuit board 10 is improved. In addition, the printed circuit board 10
The dedicated wiring peculiar to the type is directly connected to the rear surface connector 31 via the dedicated wiring connector 12, and the printed circuit board 10 and the rear surface connector 31 correspond to each other in a one-to-one correspondence. By setting the positions and the numbers of the pins 13 and the pin insertion terminals 33,
Erroneous mounting of the back surface connector 31 is prevented.

In this embodiment, the pin 13 is arranged at four positions, but the number can be increased or decreased as necessary. If you increase the position of the pin 13,
As many types of printed circuit boards 10 can be supported.
Also, as a hole into which the pin 13 is inserted, there is a terminal inside.
The above hole has a function as a terminal.
Alternatively, the pin 13 may be simply inserted.
Yes.

[0023]

Since the present invention is configured as described above, it has the following effects.

The wiring common to the various printed boards is connected to the back wiring board by the common wiring connector, while the dedicated wirings of the various printed boards are connected to the connecting means by the dedicated wiring connector, whereby the back wiring is performed. Since the dedicated wiring is not connected to the board but only the common wiring is connected, the printed circuit board can be mounted at any position regardless of its type.

Further, a hole provided in the pin and connecting means provided on the printed board, as a one-to-one correspondence with in accordance with the type of printed circuit board, respectively, set <br/> vignetting in place Therefore, it is possible to prevent erroneous mounting of the connecting means mounted on the back surface of the back wiring board.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a printed circuit board unit of the present invention.

FIG. 2 is a cross-sectional view of essential parts of the printed circuit board unit shown in FIG.

FIG. 3 is a schematic perspective view of a rear surface connector of the printed circuit board unit shown in FIG.

FIG. 4 is a schematic perspective view of an example of a conventional printed circuit board unit.

[Explanation of symbols]

10 Printed Circuit Boards 11 and 22 Common Wiring Connector 12 Dedicated Wiring Connector 13 Pin 20 Shelf 21 Back Wiring Board 23 Front Side Dedicated Wiring Connector 24 Back Side Dedicated Wiring Connector 25 Through Hole 30 Connection Cable 31 Backside Connector 32 Connection Part 33 Pin insertion terminal

Claims (3)

[Claims] 1. A back wiring board having a plurality of different types of printed boards mounted on the surface via connectors, respectively, and only wiring common to the respective printed boards is connected to the back wiring board. In a printed circuit board unit in which a dedicated wiring unique to the printed circuit board is connected to a connecting means mounted on the back surface of the back wiring board, each of the connectors has only the common wiring between the printed circuit board and the back wiring board. A common wiring connector to be connected between the back wiring board, a plurality of through holes are formed in the back wiring board corresponding to the mounting positions of the printed circuit boards, and the dedicated wiring is provided in the printed circuit boards. Is provided with a dedicated wiring connector and the dedicated wiring connector A pin that is adjacent to the connector and that can be exposed on the back surface of the back wiring board through the through hole when mounted on the back wiring board is provided at a predetermined position different for each type of the printed circuit board. The connecting means is provided with a connecting portion to be connected to the dedicated wiring connector, and the holes into which the pins are inserted correspond to the printed boards of the same type among the printed boards in a one-to-one correspondence. As described above, the printed circuit board unit is provided at a predetermined position. 2. The printed circuit board according to claim 1, wherein each of the printed circuit boards is provided with a plurality of the pins, and the connecting means is provided with the same number of the holes as the corresponding printed circuit board pins. Board unit. 3. The pin is inserted inside the hole.
Claim 1 or having a terminal connected with the pin by this.
The printed circuit board unit according to 2.