JP2000163159A - Print board and tool for connecting outside equipment of print board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a print board and a tool for connecting outside equipment with the print board without receiving any electromagnetic disturbance. SOLUTION: Outside connectors 15 and inside connectors 16 for connecting electrically connected outside equipment are arranged at a bracket 13 and pseudo brackets 22 of a PCI card 10 mounted on the PCI slots of electric equipment, and each relay connector 11 of the PCI card 10 is connected through connection cables 20 with the inside connectors 16 provided at the bracket 13 and the pseudo brackets 22. Thus, plural outside equipment can be connected with the relay connectors 11 of the PCI card 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board, and more particularly to an industry standard PCI (Peripheral Component Interconne
The present invention relates to a printed circuit board that can connect an external device to a relay connector of a printed circuit board called a card without receiving electromagnetic interference, and a connection device that easily connects the relay connector provided on the printed circuit board to the external device.

[0002]

2. Description of the Related Art As electronic devices such as personal computers are mounted, the number of mounted disk drives is increased in response to an increase in the size of applications to be mounted and an increase in the amount of data to be handled. However, not all disk drives can always be stored in the housing of the electronic device, and it is necessary to prepare an external disk box for the disk drive that cannot be stored. In order to connect an I / O card for controlling a disk drive in an electronic device to an external disk box, a shielded connector cable dedicated to external connection is required. An I / O card built in a recent personal computer differs from an I / O card of a conventional computer in that an industry standard specification is defined, and a large number of I / O cards are provided within the specification.
Requires a mechanism to control. In recent years, there has been a printed circuit board (hereinafter, referred to as a "PCI card") of the PCI specification as an I / O card of an industry standard specification built in a personal computer or its server. PCI is
PCI Special Interest Group including Intel Corporation
It is one of the standard buses proposed and provided by.
Standards such as size and thickness are defined for the PCI card. Due to electrical restrictions, the PCI card is equipped with an interface that receives a signal from the PCI bus and converts it to a local bus or a secondary PCI bus in an area near one side where the bracket is attached (hereinafter referred to as a “signal conversion area”). Used to. Then, an area (hereinafter, referred to as a “signal processing area”) on the side facing the bracket across the signal conversion area is provided with a microprocessor, a memory, and an I / O circuit for performing processing specific to the PCI card on the converted signal. Is used to mount. Further, in a region away from the bracket (hereinafter referred to as a "connection region"), a signal after processing is output and the like. For this reason, a relay connector for connecting the input / output device is usually provided at a position away from the bracket. For this reason, the relay connector is provided as a connector for connecting an input / output device mounted in the electronic device housing.

Conventionally, in order to support a large number of disk drives, as shown in FIG.
A large number of PCI cards 2 for controlling a disk are connected to a server-class personal computer having a CI slot 1, and a disk drive (not shown) is connected via an external cable 5 through an external connector 4 provided on each bracket 3 of the PCI card 2. Was. By laminating the layers on which the wiring is printed, the board member of the PCI card 2 can be formed in multiple layers. Therefore, a layer in which the signal line is extended from the connection area to the vicinity of the bracket 3 is formed. Can be directly connected to the external connector 4 of the bracket 3 to connect the disk box to the PCI card 2 without using a cable.

In recent years, electronic devices have been required to be thinner and smaller and have higher functions. One of the important problems is how many functions can be mounted on one PCI card. One. For this reason, one PCI
The surface area is secured by making the card multilayered within the range of the standard, and circuits and signal lines for each function are efficiently arranged without gaps. As a result, according to the standard of the PCI card, the signal line cannot be provided to any layer from the connection area to the bracket, and the signal may be forced to be drawn only from the relay connector.

[0005]

However, EMI (Electro Ma) is required from the relay connector in the connection area.
genetic Interference: electromagnetic interference
As a countermeasure, it can only be connected to the input / output devices in the housing. That is, in the related art, there is a problem that connection with an external device cannot be performed. For example, the PCI card 2 having a configuration such as a disk array is provided with a plurality of internal connectors 6 as shown in FIG. This internal connector 6, unlike a shielded external connector, can be used only for a built-in disk. However, when connecting an external device, it is necessary to connect the cable 7 of the internal connector 6 with an expensive and special shield.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a printed circuit board capable of connecting an external device to a printed circuit board without being affected by electromagnetic interference, and a printed circuit board provided on the printed circuit board. An object of the present invention is to provide a connection device that can easily connect a relay connector and an external device.

[0007]

In order to achieve the above object, a printed board according to the present invention is provided with a rectangular board member on which wiring is printed, and attached to one side of the board member. A bracket member that forms a part of the outer surface of the housing of the electronic device by closing the slot of the electronic device when mounted on the electronic device, and is disposed at a position away from the bracket member on the board member. In a printed circuit board having a relay connector for connecting an input / output device, the bracket member faces an external device connector portion facing the outside of the housing at the time of mounting and the inside of the housing at the time of mounting, and the external device connector portion. An external device connection unit having an internal connection connector portion electrically connected to the relay device; and connecting the relay connector and the internal connection connector portion with a cable. It is obtained so as to connect the external device to the relay connector by.

A plurality of the relay connectors are provided on the board member, and the bracket is provided with a plurality of the external device connection means, and the relay connector and the internal connection connector are connected to each other. By connecting them with cables, a plurality of external devices can be connected to a plurality of the relay connectors at the same time.

An external device connecting device for a printed circuit board according to the present invention is attached to one side of a board member on which wiring of the printed circuit board is printed, and when the printed circuit board is mounted on the electronic device, a housing of the electronic device is mounted. The internal connection connector of the external device connection means, which is provided on a bracket member forming a part of the outer surface and has an external device connector portion and an internal connection connector portion electrically connected to the external device connector portion. A first connector connected to the first connector, a second connector provided on the board member at a position separated from the bracket member, and connected to a relay connector for connecting a peripheral device; It is formed by a connection cable having a cable member having a second connector at both ends.

According to another aspect of the present invention, there is provided an apparatus for connecting an external device to a printed circuit board, comprising an external device connector portion and an internal connection connector portion electrically connected to the external device connector portion. And at least one pseudo bracket member that forms a part of the outer surface of the housing of the electronic device when attached to the electronic device, and each of the internal portions disposed on the pseudo bracket member or the bracket member of the printed circuit board. It is provided with a connection connector section and a connection cable for connecting each relay connector arranged on the printed circuit board for connecting a peripheral device.

According to another aspect of the present invention, there is provided a device for connecting a printed circuit board to an external device, the device comprising: a relay printed circuit board mounted on an electronic device for relaying transmission and reception between the printed circuit board and the external device; And an inter-board connection cable for connecting the printed circuit board to the relay board, wherein the relay printed board is connected to the relay connector provided on the printed board for connecting peripheral devices by the board connection cable. A connector for connection and attached to one side of a board member on which wiring of the relay printed board is printed, and forms a part of an outer surface of a housing of the electronic device when the relay printed board is mounted on the electronic device. A bracket member to be provided, and at least one external device connection means disposed on the bracket member and having an external device connector portion; Serial is the one having a printed signal line on the substrate member in order to electrically connect the external device connector of the printed board connector to the external device connecting means.

According to another aspect of the present invention, there is provided an apparatus for connecting a printed circuit board to an external device, the connector for connecting a printed circuit board, an external device connector, and the external device connector. An external device connection means having an internal connection connector portion connected thereto is provided, and a bracket member forming a part of an outer surface of a housing of the electronic device when attached to the electronic device, and connected to the internal connection connector portion A relay connector mounted on an electronic device and relaying transmission and reception between the printed circuit board and an external device; a relay connector of the printed circuit board and the printed circuit board of the relay printed circuit board An inter-board connection cable for connecting to a connection connector, and the external device connection means are provided, and when the electronic device is attached to the electronic device, At least one pseudo bracket member forming a part of the outer surface of the housing, the pseudo bracket member or each of the internal connection connectors provided on the bracket member, and each of the pseudo bracket members provided on the relay printed circuit board. And a connection cable for connecting to the relay connector.

[0013]

Preferred embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a schematic overall configuration diagram of a PCI card 10 which is a first embodiment of a printed circuit board according to the present invention, and FIG. It is a schematic block diagram. The PCI card 10 includes a rectangular board member 12 on which wiring is printed and having a relay connector 11 disposed in the above-described connection area, and a bracket member 13. The bracket member (hereinafter “bracket”) 13 is
PCI (not shown) when mounting the board member 12 to the electronic device
A housing 1 for an electronic device, which is provided on one side to close the slot.
4 form part of the outer surface. The bracket 13 has an external device connector portion (hereinafter, referred to as an “external connector”) 15 facing the outside of the housing when mounted, and an internal connection connector portion facing the inside of the housing when mounted and electrically connected to the external connector 15. (Hereinafter, “internal connector”) 16 are provided as external device connection means.

FIG. 1 shows a connection cable 20 formed by shielded first and second connectors 17 and 18 for connecting the internal connector 16 and the relay connector 11 and a shielded cable member 19. It is shown. In FIG. 1, since the configuration of the electronic device is not a characteristic configuration of the present invention, only the PCI connector 21 provided on the motherboard for convenience is shown except for the housing 14 of FIG.

In the above configuration, a signal to be transmitted from the PCI card 10 is transmitted from the relay connector 11 to the external connector 15 via the connection cable 20 and the internal connector 16 of the bracket 13. As a result, the data can be sent to an external device connected to the external connector 15. Conversely, a signal from an external device connected to the external connector 15 is input into the PCI card 10 from the relay connector 11 via the external connector 15, the internal connector 16, and the connection cable 20.

According to the present embodiment, the PCI card 10
The bracket 13 is provided with an external device connection means, and a connection cable 20 is used to connect the internal connector 16 and the relay connector 11 of the external device connection means at a remote position. That is, the I pulled out from the substrate member 12
Since the I / O bus can be pulled out from the external connector 15, even if wiring between the relay connector 11 and the bracket 13 cannot be performed on the PCI card 10 due to dimensional standards, the disk drive can be connected to the relay connector 11 without electromagnetic interference. And other external devices. As a result, the disk capacity of the computer as the electronic device can be increased.

In this embodiment, the bracket 13
The connector 17 of the connection cable 20 is connected to the internal connector 16 provided in the bracket 1, but the connector 16 and the connector 17 are integrated to form the bracket 1
3 and the connection cable 20 may be integrated. The same applies to the following embodiments.

Embodiment 2 FIG. 3 is a schematic overall configuration diagram of a PCI card 10 which is a printed circuit board according to a second embodiment of the present invention. As shown in FIG. 3, the PCI card 10 is provided with a plurality of relay connectors 11-1 and 11-2, and further includes two external device connecting means including an external connector 15 and an internal connector 16. One is provided. Although a single PCI card 10 enables connection of a plurality of disk drives when a configuration such as a disk array is adopted, in the present embodiment, a plurality of external device connection means are provided on the bracket 13. By doing so, a plurality of external devices can be connected at the same time. That is, the relay connector 11-
By connecting the internal connectors 16-1 and 16-2 with the connection cables 20-1 and 20-2, respectively, a plurality of external devices can be simultaneously connected.

With the above configuration, no special shield is required, and the present embodiment is provided with a plurality of external connectors using general parts (brackets, external connectors, cables, etc.). PCI card 1 in the form
0 can be easily attached and manufactured at low cost.

FIG. 3 shows two sets of relay connectors 11.
Although the PCI card 10 having the -1 and 11-2 and the external device connecting means has been described as an example, if possible, more sets may be provided.

Embodiment 3 FIG. FIG. 4 is a schematic overall configuration diagram of a PCI card 10 which is a printed circuit board according to Embodiment 3 of the present invention. The PCI card 10 has a plurality of relay connectors 11. PCI card 10
The bracket 13 is provided with a single external device connecting means including an internal connector 16. In the present embodiment, the pseudo bracket member 2 is further inserted into a PCI slot (not shown) adjacent to the place where the PCI card 10 is mounted.
2 is attached. The pseudo bracket member (hereinafter, “pseudo bracket”) 22
Since it conforms to the PCI standard, it has almost the same outer shape as the bracket 13 and forms a part of the outer surface of the housing of the electronic device when the PCI slot is installed. And bracket 1
3, the same external device connection means as those in FIG. As the connection cable 20, a plurality of the same cables as those in the above embodiments are used.

In the second embodiment, the PCI card 10
Although a plurality of external device connection means are arranged on the bracket 13 attached to the device, the connector size is relatively large due to the standard of the connector for connecting the external device.
It is not always possible to arrange the number of external device connecting means on one bracket 13 as many as the number of relay connectors 11. Therefore, in the present embodiment, the pseudo bracket 22 having the external device connection means is attached to the PCI slot and the PCI card 1
By connecting the connection cable 20 attached to each of the relay connectors 11 to the internal connector 16 of each pseudo bracket 22, an external device can be connected to each of the relay connectors 11. Thereby, a plurality of external devices can be connected to the PCI card 10 at the same time.

In addition, special shielding is not required by the above configuration, and the present embodiment is provided with a plurality of external connectors using general parts (brackets, external connectors, cables, etc.). PCI card 1 in the form
0 can be easily attached and manufactured at low cost.

In this embodiment, the bracket 13
Although one external device connecting means is provided for each of the dummy bracket 22 and the pseudo bracket 22, two or more external device connecting means may be provided for the bracket 13 and the like depending on the size of the connector. That is, two external device connecting means provided on the bracket 13 are connected to the two relay connectors 11 of the PCI card 10, and two external device connecting means provided on the pseudo bracket 22 are connected to the remaining two relay connectors 11, respectively. .

FIG. 4 shows four relay connectors 11.
Although the configuration in which four external device connection means are provided has been described as an example corresponding to the above, the number is not limited to this.

Embodiment 4 FIG. 5 is a schematic overall configuration diagram of a PCI card 10 which is a printed circuit board according to Embodiment 4 of the present invention. FIG. 5 shows the second embodiment.
As shown in FIG. 3, a PCI card 10 having a plurality of relay connectors 11 (three in this example) and a relay printed circuit board (hereinafter, “relay card”) characterized in the present embodiment.
23 are shown. The relay card 23 is provided with a printed board connection connector 25 that is connected to each of the relay connectors 11 of the PCI card 10 by a board-to-board connection cable 24. In the present embodiment,
The printed circuit board connector 25 has a relatively large number of pins for passing a local bus or a plurality of I / O buses, and can be connected to a plurality of relay connectors 11 as shown in FIG. Of course, a plurality of relay connectors 11 may be provided in correspondence with each relay connector 11. Further, unlike the PCI card 10, there is no need to mount a signal conversion interface, a large-capacity memory, and the like. Therefore, the arrangement position of the printed circuit board connector 25 on the relay card 23 is determined by the PCI
There are no particular restrictions as with the card 10. Also, the printed circuit board connector 2 is mounted on the board member 27 of the relay card 23.
The signal line 28 can be printed from 5 to the bracket 26. Therefore, in the present embodiment, no connection cable is used. Further, the bracket 26 of the relay card 23 does not use a connection cable, so the internal connector of each of the above embodiments is unnecessary, and only a plurality of external connectors 29 are provided to connect external devices.

In the above configuration, a signal to be transmitted from the PCI card 10 is transmitted from the relay connector 11 to the external connector 29 via the inter-board connection cable 24, the printed board connection connector 25, and the signal line 28. As a result, the data can be sent to an external device connected to the external connector 29. Conversely, signals from the external device connected to the external connector 29 are transmitted to the external connector 29, the signal line 28, the board connection connector 25, and the board connection cable 2.
4, and is input from the relay connector 11 into the PCI card 10.

This embodiment having the above configuration is effective in the following cases. In other words, the PCI card 10 having a configuration like a disk array may not be able to secure a space for mounting an I / O controller for performing input / output control of each disk drive even if the PCI cards are stacked within the standard range. possible. In such a case, by providing the relay card 23, P
This provides a space for mounting a circuit such as an I / O controller that cannot be mounted on the CI card 10 and allows simultaneous connection with a plurality of external disk drives.

In this embodiment, the PCI card 1
0 and the printed board connecting connector 25 of the relay card 23 are connected by the board connecting cable 24, but the printed board connecting connector 25 can be connected without using the board connecting cable 24. You may make it connect directly with the relay connector 11 as a substantially U-shape. Alternatively, the connectors 11 and 25 may be arranged at opposing positions on the opposing surfaces of the cards 10 and 23 and directly connected. The same applies to the following fifth embodiment.

Embodiment 5 FIG. 6 is a schematic overall configuration diagram of a PCI card 10 which is a fifth embodiment of the printed circuit board according to the present invention. This embodiment has a configuration in which the third embodiment is applied to the fourth embodiment. That is, when the external device has a large connector and a plurality of external device connection means cannot be arranged on the bracket 26 of the relay card 23, the pseudo bracket 22 similar to that of the third embodiment is attached to the PCI slot.
Connect the signal line 28 from the board connection connector 25 to the bracket 2
6, instead of wiring directly to the relay connector 30, the connection cable 20 connects the relay connector 30 to the bracket 26 or the pseudo bracket 22.

With such a configuration, a plurality of external devices can be connected simultaneously even when a plurality of external device connection means cannot be arranged on the bracket 26 of the relay card 23 as described above.

In this embodiment, the PCI card 1
0 and an external device, not a relay cable but a relay card 23
To connect via. Thereby, the I / O in which the PCI card 10 and the external device are mounted on the relay card 23
It can be configured to be connected via a chip such as a controller.

Embodiment 6 FIG. FIG. 7 is a schematic configuration diagram showing one embodiment of a connection cable constituting the connection device according to the present invention. The present embodiment relates to an application example of a connection cable, and is incorporated in a cable member of a connection cable 31 for connecting the relay connector 11 of the PCI card 10 and the internal connector 16 of the bracket 13 as shown in FIG. Characterized in that internal device connection connectors 32-1, 32-2, and 32-3 for connecting the input / output devices are provided. FIG. 7 shows a connection cable 31 in which a portion from the relay connector 11 to the internal device connection connector 32-1 is a flat cable, and a portion between the internal device connection connector 32-1 and the internal connector 16 is a coaxial cable. Is exemplified.

With such a configuration, it is possible to connect both the internal I / O device and the external I / O device with one cable. This connection cable 31 can be applied to each of the above embodiments,
1 by switching the access destination from
The card 10 can perform data transmission and reception with any I / O device.

Although an example in which three internal device connection connectors are provided in the connection cable is shown here, the number is not limited to this.

In the present embodiment, the case of a PCI card has been described as an example. However, the present invention is applied to a printed board of another standard which causes the same problem as the present invention, and a printed circuit board which does not cause such a problem. The configuration of the present invention can also be applied.

[0038]

According to the present invention, the external device connecting means is provided on the bracket member of the PCI printed circuit board, and the connecting connector portion and the relay connector of the external device connecting means which are separated from each other by using the connection cable. Since the connection is possible, even when wiring between the relay connector and the bracket cannot be performed on the PCI printed circuit board, an external device such as a disk drive can be connected to the relay connector without being subjected to electromagnetic interference.

Further, since a plurality of external device connecting means of the bracket member are provided, a plurality of external devices can be simultaneously connected to a plurality of relay connectors.

Also, a pseudo bracket member provided with external device connecting means is prepared, and a connection cable is used to connect the internal connector portion of the external device connecting means of the pseudo bracket member to the relay connector. Even when the connector size of the external device connecting means is so large that the same number of external device connecting means as the relay connector cannot be arranged in one bracket member, the pseudo bracket member is used to connect all the relay connectors to the external device at the same time. be able to.

Further, by providing the relay printed circuit board, it is possible to provide a space for mounting a circuit such as an I / O controller which cannot be mounted on the printed circuit board, and to simultaneously connect a plurality of external devices. It can be carried out.

Further, by providing a relay printed circuit board having a plurality of relay connectors, the connector size of the external device connecting means is large and the external device connecting means of the number of relay connectors are arranged on the bracket member of the relay printed circuit board. Even in cases where it is not possible, all the relay connectors on the printed circuit board can be simultaneously connected to external devices by using the pseudo bracket member.

[Brief description of the drawings]

FIG. 1 is a schematic overall configuration diagram showing a first embodiment of a PCI printed circuit board according to the present invention.

FIG. 2 is a diagram illustrating a PC when an electronic device is mounted according to the first embodiment;
It is a schematic structure figure when I card is seen from the exterior of a case.

FIG. 3 is a schematic overall configuration diagram showing a second embodiment of a PCI printed circuit board according to the present invention.

FIG. 4 is a schematic overall configuration diagram showing a third embodiment of a PCI printed circuit board according to the present invention.

FIG. 5 is a schematic overall configuration diagram showing a fourth embodiment of a PCI printed circuit board according to the present invention.

FIG. 6 is a schematic overall configuration diagram showing a fifth embodiment of a PCI printed circuit board according to the present invention.

FIG. 7 is a schematic configuration diagram showing one embodiment of a connection cable constituting a connection device according to the present invention.

FIG. 8 is an overall configuration diagram showing an example of an embodiment when a conventional PCI printed circuit board is connected to an external device.

FIG. 9 shows a conventional P having a configuration like a disk array.
FIG. 1 is an overall configuration diagram schematically showing a CI printed circuit board.

[Explanation of symbols]

10 PCI card, 11, 11-1, 11-2, 30
Relay connector, 12, 27 Board member, 13, 26
Bracket (member), 14 housing, 15, 29 Connector for external device (external connector), 16, 16-1, 16
-2 Internal connection connector (internal connector), 17,
Reference Signs List 18 connector, 19 cable member, 20, 31 connection cable, 21 PCI connector, 22 pseudo bracket (member), 23 relay printed circuit board (relay card), 24 board connection cable, 25 printed circuit board connector, 28 signal line , 32-1, 32-2,
32-3 Connector for connecting internal devices.

Claims (6)

[Claims] A rectangular board member on which wiring is printed; and a part of an outer surface of a housing of the electronic device which is attached to one side of the board member and closes a slot of the electronic device when the electronic device is mounted on the board member. And a relay connector disposed on the board member at a position distant from the bracket member and for connecting an input / output device in a housing.A printed circuit board comprising: External device connection means having an external device connector portion facing the outside of the housing at the time of mounting and an internal connection connector portion facing the inside of the housing at the time of mounting and being electrically connected to the external device connector portion; An external device can be connected to the relay connector by connecting the relay connector and the internal connection connector section with a cable. Printed circuit board to be. 2. A plurality of relay connectors are provided on the board member; a plurality of the external device connection means are provided on the bracket; and the relay connector and the internal connection connector portion are connected to each other. The printed circuit board according to claim 1, wherein a plurality of external devices can be simultaneously connected to the plurality of relay connectors by connecting them with cables. 3. A bracket member, which is attached to one side of a board member on which wiring of a printed board is printed and forms a part of an outer surface of a housing of the electronic apparatus when the printed board is mounted on the electronic apparatus. A first connector connected to the internal connection connector of the external device connection means having an external device connector and an internal connection connector electrically connected to the external device connector; A second connector provided at a position on the board member apart from the bracket member and connected to a relay connector for connecting peripheral devices; a cable member having the first and second connectors at both ends; A device for connecting a printed board to an external device, the device being formed by a connection cable having: 4. An electronic device when an external device connecting means having an external device connector portion and an internal connection connector portion electrically connected to the external device connector portion is provided and attached to the electronic device. At least one pseudo bracket member forming a part of the outer surface of the housing, and each of the internal connection connector portions provided on the pseudo bracket member or the bracket member of the printed circuit board, and the print for connecting peripheral devices. A connection cable for connecting to each relay connector provided on the board; and a device for connecting a printed board to an external device. 5. A relay printed circuit board mounted on an electronic device for relaying transmission and reception between a printed circuit board and an external device, and an inter-board connection cable connecting the printed circuit board and the relay printed circuit board. The relay printed circuit board includes a printed circuit board connector connected by the board connection cable to a relay connector provided on the printed circuit board for connecting a peripheral device, and wiring of the relay printed circuit board is printed. A bracket member attached to one side of the board member to be formed and forming a part of an outer surface of a housing of the electronic device when the relay printed circuit board is mounted on the electronic device; At least one external device connection means having a device connector portion, the printed circuit board connection connector and the external device connection The external device connection instrument of the printed circuit board characterized by having a a printed signal line on the substrate member in order to electrically connect the external device connector of the stage. 6. An external device connecting means having a printed circuit board connecting connector for connecting a printed circuit board, an external device connector portion, and an internal connecting connector portion electrically connected to the external device connector portion. A bracket member that forms a part of the outer surface of the housing of the electronic device when the device is mounted and attached to the electronic device, and a relay connector that is connected to the internal connection connector portion; A relay printed circuit board that relays transmission and reception between the printed circuit board and an external device; an inter-board connection cable that connects a relay connector of the printed circuit board and the printed circuit board connector of the relay printed circuit board; At least one pseudo bracket that is provided with device connection means and forms a part of an outer surface of a housing of the electronic device when attached to the electronic device. And a connection cable for connecting each of the internal connection connector portions provided on the pseudo bracket member or the bracket member and each of the relay connectors provided on the relay printed circuit board. Characteristic equipment for connecting external devices to printed circuit boards.