JP2001244661A - Electronic switching system and computer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic switching system and a computer system in which waveform deterioration due to the length of wiring is not generated, and a problem due to the length of wiring is not generated between a common connection board or a common connection connector and each board. SOLUTION: The system is provided with a cabinet 1 which forms at least four side surfaces and apertures for inserting boards 201, 301, 303, a board 101 formed on one side surface out of four side surface, a board which mounts an LSI 337 in the almost central part, mounts LSIs 322-328 radially, mounts a connector 211 in one edge, and mounts connectors 313-316 in other edges, a rail stretched along the direction of insertion, and connector rod bodies connecting the connectors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic switching device and a computer device, and more particularly to a method of constructing a device for minimizing a wiring length of a printed circuit board.

[0002]

2. Description of the Related Art In recent years, public networks and LANs (Local Ar
The communication capacity required for ea Network) is increasing, and the exchange capacity of the electronic exchange device used for the communication capacity is 5-1.
It has reached 0 Gbps.

FIG. 10 shows that the exchange capacity is 5 Gbps (622.
FIG. 2 is a block diagram showing a circuit configuration of an electronic switching device of the type (08 Mbps × 8 ch). In FIG.
02 is a CPU section, 411 to 418 are reception system terminal interface sections, 421 to 428 are reception system signal processing sections, 431
Reference numerals 438 denote transmission signal processing units, and reference numerals 441 to 448 denote transmission terminal interface units. Reference numeral 401 denotes a module including an 8-input 8-output switching LSI that performs a switching operation, and connects an 8-channel input signal having a transmission speed of 622.08 Mbps to an arbitrary output channel.
Reference numeral 402 denotes a module including a microprocessor LSI, which collects settings for each LSI and collects alarm information and the like. Reference numerals 421 to 428 denote modules including a reception signal processing LSI, a memory, and the like, for performing path control, congestion control, parallel / serial conversion, and the like. 431 to 438 are transmission signal processing LSIs
And a module including a memory and the like for performing path control, congestion control, serial / parallel conversion, and the like. 411
418 and 441 to 448 are terminal interfaces L
This module includes an SI, an optical transmission module, and the like, and performs encoding for transmitting and receiving signals to and from the outside of the switching device, and performs conversion between optical signals and electric signals.

Referring to FIG. 10, the flow of signals when switching from channel 1 to channel 8 will be briefly described. A packet signal sent from a terminal outside the switching device via a cable is sent to a terminal interface unit 411. The input is performed, and processing such as code conversion is performed. The packet signal output from the terminal interface unit 411 is subjected to buffering, routing processing, and the like in the signal processing unit 421, and is input to the switching unit 401. The switching unit 401 recognizes the destination address of the packet signal and outputs the packet signal to a channel to be output. The output packet signal is subjected to processing such as buffering in a signal processing unit 438, and is received in a terminal interface unit 448. Processing such as code conversion is performed in the terminal interface unit 448, and output to the outside of the switching device and sent to a terminal connected through a cable. The exchange operation is performed in this manner.

FIGS. 11 (a) and 11 (b) are diagrams showing the actual LSI configuration and the board mounting method in the circuit of FIG. 10, respectively.
3 is a terminal interface board, 504 is a CPU board, 505 is a backboard, 510 is a replacement LSI, 51
Reference numerals 1 to 518 denote signal processing LSIs in which a reception signal processing unit and a transmission signal processing unit are integrated, and 521 to 528 denote terminal interface LSIs in which a reception terminal interface unit and a transmission terminal interface unit are integrated. Reference numerals 538 denote connectors for connecting to terminals outside the exchange device by cables. The reason why the terminal interface board is divided into two is that the number of channels that can be mounted on one terminal interface board is limited by the number of connectors that can be mounted on the front of the switching device. In this case, the physical size of the connector Therefore, since only four channels can be mounted on a single device, the configuration is two.

The exchange board 501 has a signal speed of 62
Since the speed is as high as 2.08 Mbps, the wiring length is made as short as possible so that the signal waveform is not deteriorated, and it is configured to fit in one board. 622.08 Mbp between the exchange board 501 and the terminal interface boards 502 and 503
Since transmission is difficult at a signal speed of s, the signal processing LSI 5
In steps 11 to 518, the transmission speed is reduced to, for example, 1/8, and signals are transmitted between boards using an 8-bit signal of 77.76 Mbps. Also, the CPU board 504 and the other boards 501, 502,
A signal between 503 is a relatively low-speed signal, and is transmitted by a bus signal of several tens of bits from end to end of the backboard.

[0007] As described above, the exchange device includes a plurality of boards.
It is configured to be connected in parallel via the backboard.

[0008]

Looking at the wiring (a) and the wiring (b) in the exchange board 501, the LSI 510 and the LS
Wiring (a) from the physical positional relationship with I511 and 514
Is shorter than the wiring (b).

However, since the LSI 510 synchronizes the input signals from the respective channels, it is necessary to make the input phases of the respective input signals uniform by performing equal-length wiring. For this reason, conventionally, the length of the wiring (a) having a short wiring length must be made equal to the length of the wiring (b) having a long wiring length, so that the problem such as waveform deterioration is further increased. Was.

Also, since the wiring length differs between the exchange board 501 and each of the terminal interface boards 502 and 503 depending on the position of the terminal interface board, it is difficult to adjust the timing, or the board located farthest away. When the signal transmission is performed, there is a problem that the frequency that can be transmitted is limited.

[0011] The same problems as described above have also been encountered in large-sized computer devices.

Therefore, the present invention has been made in view of the above-mentioned problems, and does not cause waveform deterioration or the like due to the length of the wiring, and also provides a connection between the common connection board or the common connection connector and each board. It is another object of the present invention to provide an electronic exchange device and a computer device that do not cause a problem due to the length of the wiring.

[0013]

Means for Solving the Problems To solve the above-mentioned problems,
In order to achieve the object, according to the present invention, a plurality of electronic circuit boards are connected to a common connecting means for commonly connecting, and an electronic exchange device and a computer in which the electronic circuit boards are individually detachable. An apparatus, comprising: a housing having at least four sides formed therein and an opening formed to allow the electronic circuit board to pass therethrough;
The common connection means provided on the side surface and the first electronic circuit element are mounted substantially at the center, and the second electronic circuit element is mounted on the first electronic circuit element.
For mounting radially from the electronic circuit element of the above, mounting a first connector connected to the common connection means at an edge, and performing connection between the second electronic circuit elements at another edge. The electronic circuit board on which the second connector is mounted, extending along the insertion direction of the electronic circuit board, maintaining the electronic circuit board in a state of connection to the common connection means, and detachably mounted And a connector means for connecting between the second connectors.

[0014] The common connection means may be a connector-mounted mother board or a connector rod body in which a plurality of connectors are fixed to a holding rod body and wires are connected between the connectors, and a side surface of the housing facing the opening. It is characterized by being fixed to.

Further, the substrate fixing means is provided in the housing.
The electronic circuit board is characterized by comprising a plurality of guide rails fixed between two front and rear columns arranged at the corners and an ejector provided on the electronic circuit board.

Further, the connector means is characterized by comprising a multi-core cable with a connector at both ends attached between any two points along the longitudinal direction of the connector holding rod body with the ejector.

The electronic circuit board is formed in a substantially rectangular shape, the second connector for connecting to the connector means is mounted on both side surfaces, and an external terminal interface connector is mounted on the front surface. It is characterized by being done.

Further, the plurality of guide rails are arranged with the guide passage grooves facing upward, and the guide rods fixed to the lower surface of the electronic circuit board are passed through the grooves of the guide rails. The feature is that it can be inserted and removed.

In the plurality of guide rails, grooves for guiding the guides are arranged laterally, and the tips of L-shaped guide members fixed to the lower surface or the upper surface of the electronic circuit board are passed through the grooves of the guide rails. The electronic circuit board can be inserted and removed.

Further, the connector means is provided with a rotation angle of several tens of degrees around the mounting portion of the support, and rotates the connector holding rod body with the ejector to use the ejector to thereby provide the second means. It is characterized in that connection and disconnection between connectors are enabled.

The multi-core cable with connectors at both ends is a multi-core fine coaxial cable, a flexible multi-core cable having a microstrip structure, or a multi-core optical fiber cable.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

First, FIG. 1 is a diagram showing main components of a housing 1 in an electronic exchange. In FIG. 1, 10
1 is a backboard (also called a motherboard), 102,
103 and 104 are connectors for mounting a printed circuit board;
Reference numerals 05 to 110 denote connector holding rods provided with ejectors for removing and inserting substrates at both ends, and 111 to 11 fixed to the housing 1.
Reference numeral 6 is a guide rail, 117 to 124 are fine coaxial cables with coaxial connectors at both ends, and 125 to 128 are columns for constituting the housing 1 and for opening in four directions as shown in the figure. Other, not shown top plate, bottom plate,
The front panel, side panel, reinforcing plate, power supply, fan, screws, etc. are installed as needed to complete the electronic exchange.

Next, FIG. 2 is a view showing the structure of a board attached to the housing 1 of FIG. 1, wherein (a) is an external perspective view as viewed obliquely from above, and (b) is a view as viewed from the front. It is.

In FIG. 2, reference numeral 201 denotes a printed circuit board;
02 is a switching LSI, 203 to 210 are signal processing LSIs,
211 is a connector for attaching to the back board 101, 212 to 219 are fine coaxial connectors, and 220 and 2
Reference numeral 21 denotes an ejector for removing and inserting a substrate;
3 is a guide fixed to the back surface.

Next, the configuration of the electronic exchange device after completion will be described with reference to the external perspective view when three boards are mounted on the housing 1 of FIG. 1 in FIG. The reference numeral 303 below the exchange board 201, which is located on the exchange board 201 in FIG. 2, is a CPU board.

A back board mounting connector 211 is mounted on each board as shown in FIG.
The configuration is such that each board and the backboard are connected in accordance with 2, 103 and 104.

Also, in FIG.
Reference numerals 4 and 211 denote high frequency connectors whose impedance is matched to 50 ohms or the like, similarly to the coaxial cable.
High-speed signals are exchanged. In addition, back board 10
Power is also supplied from one side. When inserting each board into the housing 1, a guide 22 attached to the lower surface of each board is used.
2, 223 through the grooves of the guide rails 111 to 116,
The ejectors 220 and 221 can be attached with high accuracy by hooking them onto part of the columns 125 and 126 and pushing them. As shown in FIG. 2B, the guides 222 and 223 are rod-like objects that are long in the insertion direction or protrusion-like rods that are attached at several places in the guide rail direction. It is configured to pass through the grooves of the guide rails 111 to 117 attached so as to face upward.

After each board is inserted, the connector holding rod with ejector 10 attached to the side is attached.
5 to 110 are connected to each board by pushing in using an ejector. The connector holding rods with ejectors 105 to 107 are attached to the columns 125 and 127, respectively.
Numeral 10 is attached to the columns 126 and 128, respectively, and rotates about several tens of degrees in the direction of the angle θ in FIG. In FIG. 1, reference numeral 105 denotes a position when the board is not inserted,
110 is a position when the board is inserted.

Connector holding rods with ejectors 105-1
10 is a fine coaxial cable 117 with coaxial connectors at both ends.
~ 124 coaxial connector parts are fixed,
By pushing 110, the fine coaxial cable 117-
The coaxial connector section 124 and the fine-wire coaxial connectors 212 to 219 attached to each boat are fitted so that signals between the boards are connected.

Next, the signal flow will be described. The circuit configuration is the circuit configuration shown in FIG. 10 as in the conventional example, and the LSI configuration is also the configuration in FIG. 11A as in the conventional example. Here, the connectors 431 to 438 are 311 to 311.
18 and the signal processing LSIs 521 to 528
210, and the switching LSI 510 is 202. The division of the board differs from the conventional example in that the terminal interface board is one. The flow of signals when switching from channel 1 to channel 8 as described in the conventional example will be described. A packet signal input to the connector 311 through a cable from a terminal outside the switching device is input to the terminal interface LSI 321 and subjected to processing such as code conversion. The packet signal output from the terminal interface board 30 passes through the fine-wire coaxial connector 331.
1 is sent out. The packet signal transmitted from 331 is input to the switching board 302 from the fine coaxial connector 212 through the fine coaxial cable 119 with coaxial connectors at both ends, and is received by the signal processing LSI 203. In 203, buffering, routing processing, and the like are performed.
The data is sent to the SI 202. The switching LSI 202 recognizes the destination address of the packet signal and outputs the channel 8 to be output.
To send a packet signal. The transmitted packet signal is subjected to processing such as buffering in the signal processing LSI 210, passes through the fine-wire coaxial connector 219, and exchange board 201.
It is sent out. The packet signal transmitted from the 219 passes through the fine coaxial cable 123 with coaxial connectors at both ends, is input from the fine coaxial connector 336 to the terminal interface board 301, and is received by the terminal interface LSI 328. The received packet signal is subjected to processing such as code conversion in the terminal interface LSI 328, output from the connector 318 to the outside of the switching device, and sent to a terminal connected through a cable. The exchange operation is performed in this manner.

Next, the difference from the conventional electronic exchange will be described in detail. First, an exchange board is used. In the conventional example, the wiring length between the exchange LSI 510 and each of the signal processing LSIs 511 to 518 is different, which is problematic.
It can be seen from FIG. 2A that the wiring length between 0 and 0 is almost the same. This is a signal processing L around the switching LSI 202.
This is because the SIs 203 to 210 are arranged radially, and more specifically, the connection points between the signal processing LSIs 203 to 210 and the terminal interface LSIs 321 to 328 are provided not only on the backboard side but also on the side of the fine wire coaxial connector side. It depends.

Next, regarding the terminal interface board,
In the conventional example, two terminal interface boards are provided for each of four channels, and signal processing LSIs 511 to 518 are used.
And terminal interface LSIs 521 to 524 and 52
Although there was a problem that the wiring lengths between 5 and 528 were different, in this embodiment, since the connectors 313 to 316 were arranged on the side of the exchange device, the terminal interface board was 1
And the terminal interface LSI3
By disposing the positions of the signal processing LSIs 203 to 210 and the signal processing LSIs 203 to 210, the terminal interface LSIs 321 to 328 and the signal processing LSIs 203 to 21 are arranged.
The wiring length between 0 was almost the same for each channel. Further, since an LSI such as the clock driver 337 can be arranged at the center of the terminal interface board 301, a clock signal and the like can be wired with the same wiring length for each channel.

The CPU board 303 and each board 30
The wiring between the first and second wires 302 can be arbitrarily wired using not only the backboard but also the fine coaxial cable on the side of the exchange device, so that the wiring length can be minimized.

In this embodiment, the switching device has been described as an example. However, the present invention is not limited to the switching device. For example, a plurality of independent function blocks such as a multi-CPU type computer device are connected to a central control unit. Can be effectively used for a device controlled by the device and a configuration of a clock supply system for a plurality of functional blocks.

In this embodiment, a fine coaxial cable has been described as an example. However, for example, a flexible multi-core cable having a microstrip structure has the same characteristics as a coaxial cable and can be effectively used in the present invention.

Next, FIGS. 4 and 5 are external perspective views for explaining a second embodiment of the present invention. The same reference numerals are given to the components already described, and the description will be omitted. 4 shows a board on which an optical transmission module is mounted, and 601 to 606 are multi-channel optical transmission modules called optical interconnection modules. FIG.
Shows the configuration of the housing 1, and 701 to 706 are multi-core optical fibers with optical connectors at both ends.

In the above embodiment, a fine coaxial connector is attached to the side surface of each board, and electric signals are transmitted between the boards via a fine coaxial cable with a coaxial connector at both ends. It can be replaced with an optical signal using a module. The use of the optical signal is used when the signal speed becomes gigabit or more, or because the influence of noise is reduced.

It is also possible to mix a multi-core optical fiber with optical connectors at both ends and a fine coaxial cable with coaxial connectors at both ends.

Next, FIGS. 6 and 7 are views for explaining a third embodiment of the present invention. In both figures, the same reference numerals are given to the components already described and the description is omitted. As shown in the external perspective view of the housing 1 in FIG. A connector holding rod is provided, and fine-wire coaxial cables with coaxial connectors 804 to 806 at both ends are further provided. Then, as shown in an external perspective view of the case where the board is mounted on the housing 1 of FIG.
2 exchange board, 903 CPU board, 904-90
6 micro-wire coaxial connectors are provided.

As described above, the back board portion may be replaced with a connector holding rod and a fine coaxial cable with coaxial connectors at both ends. Further, the connector holding rods 801 to 803 are fixed to the columns 127 and 128, and
903 is inserted and the fine coaxial connectors 904 to 906 are fitted with the fine coaxial cables 804 to 806 with coaxial connectors fixed to the connector holding rods 801 to 803, so that the signal wired by the backboard is reduced. It is configured to be connectable.

As described above, the side and rear sides may be connected by a fine coaxial cable, and the wiring on the rear side may be connected to the optical signal connection as described in the second embodiment with the above configuration. May be replaced by

Finally, FIGS. 8 and 9 are views showing a fourth embodiment of the present invention. In both figures, the same reference numerals are given to the components already described and the description is omitted. As shown in FIG. 8, guide rails 1001 to 1006 are provided. In the above-described first embodiment, the grooves of the guide rails are arranged upward, whereas the grooves of each guide rail are arranged inward as shown. Other parts are substantially the same as above.

FIG. 9 is a front view of a board to be mounted on a housing together with guide rails. 8, 1101 and 1102 are L-shaped guide members fixed to the back surface of the board. In each of the above embodiments, the downward guide attached to the board is configured to pass through the guide rail in which the groove is arranged upward, but in the present embodiment, the tip of the L-shaped guide member attached to the board is configured. Is passed through a guide rail in which the groove is arranged laterally.

By doing so, it is possible to prevent an undesirable situation in which the connector arranged on the side surface of the board comes into contact with the guide rail when the board is inserted into or removed from the slot of the housing.

Although the L-shaped guide member is arranged on the lower surface of the board, it may be arranged on the upper surface of the board.

As described above, the causes of the problems in the conventional switching apparatus are that the circuits to be logically wired radially are
Although there was a point that wiring could not be arranged radially due to mounting, the circuit that should be logically wired radially as described above can be solved by wiring radially also on mounting, and by using the side of the housing effectively Maintenance work is also easier.

[0048]

As described above, according to the present invention,
Provided is an electronic switching device and a computer device which do not cause waveform deterioration due to the length of the wiring length and which do not cause a problem due to the length of the wiring between the common connection board or the common connection connector and each board. Can be.

[Brief description of the drawings]

FIG. 1 is a housing 1 in an electronic exchange device according to a first embodiment.
FIG. 2 is an external perspective view showing main components of FIG.

2A is an external perspective view showing a configuration of a replacement board attached to the housing 1 of FIG. 1, and FIG. 2B is a front view of the replacement board.

FIG. 3 is an external perspective view in which three boards are mounted on the housing 1 of FIG. 1;

FIG. 4 is an external perspective view illustrating a terminal interface board according to a second embodiment.

FIG. 5 is an external perspective view illustrating a configuration of a housing 1 according to a second embodiment.

FIG. 6 is an external perspective view illustrating a configuration of a housing 1 according to a third embodiment.

FIG. 7 is an external perspective view showing a state where a board is mounted on the housing 1 of FIG. 6;

FIG. 8 is an external perspective view illustrating a configuration of a housing 1 according to a fourth embodiment.

FIG. 9 is a front view showing an exchange board to be attached to the housing 1 of FIG. 8;

FIG. 10 is a diagram showing a circuit configuration of a conventional electronic exchange.

11A is a block diagram showing an LSI configuration of a conventional switching device, and FIG. 11B is an external perspective view showing a board configuration.

DESCRIPTION OF SYMBOLS 1 Housing 101, 105 Backboard (common connection means) 102-104 Printed circuit board mounting connector 105-110 Coaxial connector holding rod with ejector 111-116, 1001-1006 Guide rail 117-124, 804- 806 Fine coaxial cable with coaxial connectors at both ends 125 to 128 Post 201 Printed circuit board 202, 401, 510 Replacement LSI (first electronic circuit element) 203 to 210, 421 to 428, 431 to 438, 5
11 to 518 Signal processing LSI (second electronic circuit element) 211 Backboard connector 212 to 219, 904 to 906 Fine coaxial connector 220, 221 Ejector 222, 223 Guide 301, 502, 503, 901 Terminal interface board 302, 501, 902 Replacement board 302, 504, 903 CPU board 311 to 318, 531 to 538 Connector 321 to 328, 411 to 418, 441 to 448, 5
21-528 Terminal interface LSI 331-336 Micro coaxial connector 337 Clock driver (first electronic circuit element) 601-606 Multi-channel optical transmission module 701-708 Multi-core optical fiber with optical connector at both ends 801-803 Connector holding rod 1101 , 1102 L-shaped guide member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 1/00 320F

Claims (18)

[Claims] 1. An electronic exchange device in which a plurality of electronic circuit boards are connected to common connecting means for connecting them in common, and wherein the electronic circuit boards are individually detachable, wherein at least four side surfaces are formed. A housing having an opening through which the electronic circuit board is inserted, the common connection means provided on one of the four side surfaces, and a first electronic circuit element mounted substantially at the center. The second electronic circuit element is mounted radially from the first electronic circuit element, a first connector connected to the common connection means is mounted at an edge, and the second electronic circuit element is mounted at another edge. An electronic circuit board on which a second connector for making connection between circuit elements is mounted, and an electronic circuit board extending along a direction in which the electronic circuit board is inserted and connecting the electronic circuit board to the common connection means. Against maintaining the connected state, and removable and substrate fixing means enabling, electronic switching apparatus characterized by comprising a connector means for connecting said second connector. 2. The connector according to claim 2, wherein the common connection means is a connector-mounted mother board or a connector rod body in which a plurality of connectors are fixed to a holding rod body and wires are connected between the connectors, and a side surface of the housing facing the opening. The electronic exchange device according to claim 1, wherein the electronic exchange device is fixed to the electronic exchange device. 3. The board fixing means comprises: a plurality of guide rails fixed between two front and rear columns arranged at four corners of the housing; and an ejector provided on the electronic circuit board. The electronic exchange according to claim 1, wherein: 4. The connector according to claim 1, wherein said connector means comprises a multi-core cable with connectors at both ends attached between any two points along the longitudinal direction of the connector holding rod body with ejectors. Electronic exchange equipment. 5. The electronic circuit board is formed in a substantially rectangular shape, the second connector for connecting to the connector means is mounted on both side surfaces, and an external terminal interface connector is mounted on the front surface. The electronic exchange according to claim 1, wherein the electronic exchange is performed. 6. The electronic circuit board according to claim 6, wherein the plurality of guide rails are arranged with a groove through which a guide passes upward, and a guide rod fixed to a lower surface of the electronic circuit board is passed through the groove of the guide rail. The electronic exchange device according to claim 3, wherein the electronic exchange device can be inserted and removed. 7. A plurality of guide rails, wherein grooves for passing guides are arranged laterally, and a tip of an L-shaped guide member fixed to a lower surface or an upper surface of the electronic circuit board is passed through the grooves of the guide rails. 4. An electronic exchange according to claim 3, wherein said electronic circuit board can be inserted and removed. 8. The connector means is provided with a rotation angle of several tens of degrees around a mounting portion of the support, and rotates the connector holding rod body with an ejector to use the ejector, whereby the second means is provided. 5. The electronic exchange according to claim 4, wherein connection and disconnection between the connectors are enabled. 9. The electronic switching device according to claim 4, wherein the multi-core cable with connectors at both ends is a multi-core fine-wire coaxial cable, a flexible multi-core cable having a microstrip structure, or a multi-core optical fiber cable. 10. A computer device in which a plurality of electronic circuit boards are connected to common connection means for connecting them in common, and said electronic circuit boards are individually detachable, wherein at least four side surfaces are formed. A housing formed with an opening through which the electronic circuit board is inserted, the common connection means provided on one of the four side surfaces, and a first electronic circuit element mounted substantially at the center; The first electronic circuit element is radially mounted from the first electronic circuit element, and a first connector connected to the common connection means is mounted at an edge, and the second electronic circuit is mounted at another edge. An electronic circuit board on which a second connector for connecting elements is mounted; and an electronic circuit board extending along a direction in which the electronic circuit board is inserted and connecting the electronic circuit board to the common connection board. Maintaining the connected state for a means and a substrate fixing means for detachable, computer apparatus characterized by comprising a connector means for connecting said second connector. 11. The common connection means is a connector-mounted mother board or a connector rod body in which a plurality of connectors are fixed to a holding rod body and wires are wired between the connectors, and a side surface of the housing facing the opening. The computer device according to claim 10, wherein the computer device is fixed to a computer. 12. The board fixing means includes: a plurality of guide rails fixed between two front and rear columns arranged at four corners of the housing; and an ejector provided on the electronic circuit board. The computer device according to claim 10, wherein: 13. The connector according to claim 10, wherein said connector means comprises a multi-core cable with a connector at both ends attached between any two points along the longitudinal direction of the connector holding rod body with an ejector. Computer equipment. 14. The electronic circuit board is formed in a substantially rectangular shape, the second connector for connecting to the connector means is mounted on both side surfaces, and an external terminal interface connector is mounted on the front surface. The computer device according to claim 1, wherein: 15. The electronic circuit board according to claim 1, wherein the plurality of guide rails are arranged with grooves through which the guides pass upward, and guide rods fixed to the lower surface of the electronic circuit board are passed through the grooves of the guide rails. 13. The computer device according to claim 12, wherein the computer can be inserted and removed. 16. The plurality of guide rails, wherein grooves through which the guides pass are arranged laterally, and a tip of an L-shaped guide member fixed to a lower surface or an upper surface of the electronic circuit board is passed through the grooves of the guide rails. 13. The computer device according to claim 12, wherein said electronic circuit board can be inserted and removed. 17. The connector means, wherein a rotation angle of several tens of degrees is provided around a mounting portion of the support, and the connector holding rod body with the ejector is rotated to use the ejector, thereby the second means is provided. 14. The computer device according to claim 13, wherein connection and disconnection between connectors are enabled. 18. The computer apparatus according to claim 13, wherein the multi-core cable with connectors at both ends is a multi-core fine-wire coaxial cable, a flexible multi-core cable having a microstrip structure, or a multi-core optical fiber cable.