JP2002076657A - Circuit board mounting mechanism and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit board mounting mechanism and a circuit board mounting method, where circuit boards can be easily made uniform and shortest in wiring length, and high-speed signals can be surely transmitted without deteriorating the circuit boards in detachability and maintainability, and the circuit boards can be easily detached. SOLUTION: Slots for circuit boards are disposed between support posts 101 to 104, and the circuit boards can be pulled out or inserted through guide rails 121 to 126. Connectors are provided to the edge of the circuit board so as to be pulled out or inserted in the direction that intersects the direction in which the circuit board is pulled out or inserted, connector supports 111 to 119 are operated by a rotary lever 301 to pull out or insert connectors disposed at the connector supports 111 to 119 and the connectors of the side edge of the circuit board. The rotary lever 301 is manually operated or operated by the driving force of a motor or the like, corresponding to the extraction or insertion of the board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board mounting mechanism and a circuit board mounting method, and more particularly to a circuit board mounting mechanism and a circuit board mounting method for inserting and removing a circuit board into and from a slot of an electronic device or the like.

[0002]

2. Description of the Related Art A circuit board is widely used as a component of an electronic device, but a circuit board is often used in an exchange device, a computer device and the like in a detachable form. In such an embodiment, the circuit board (printed circuit board) may be called a card, a board, or the like (hereinafter, these names are used as necessary).

In recent years, public networks and LANs (Local Area
aNetwork) is increasing, and the exchange capacity of an exchange device used for the communication capacity is 5 to 1
It has reached 0 Gbps.

FIG. 5 shows an exchange capacity of 5 Gbps (622.08).
FIG. 5 is a block diagram showing a circuit configuration of a switching device of (Mbps × 8 ch), and in FIG.
Denotes a CPU unit, 411 to 418 denote reception terminal interface units, 421 to 428 denote reception signal processing units, 431 to 4
Reference numeral 38 denotes a transmission system signal processing unit, and reference numerals 441 to 448 denote transmission system 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 8ch input signal having a transmission speed of 622.08 Mbps to an arbitrary output channel.

[0005] Reference numeral 402 denotes a module including a microprocessor LSI, which performs setting of each LSI and collection of alarm information. Reference numerals 421 to 428 denote modules including a received signal processing LSI, a memory, and the like, which perform path control, congestion control, parallel / serial conversion, and the like.

Reference numerals 431 to 438 denote transmission signal processing LSIs.
And a module including a memory and the like, which performs path control, congestion control, serial / parallel conversion, and the like.

Reference numerals 411 to 418 and 441 to 448
Is a module including a terminal interface LSI, an optical transmission module, and the like, which 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.

In FIG. 5, channel 1 to channel 8
The flow of the signal when exchanging is described. A packet signal sent from a terminal outside the switching device via a cable is input to a terminal interface unit 411, where 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 the switching unit 401
To enter.

The switching unit 401 recognizes the destination address of the packet signal and outputs the packet signal to the channel 8 to be output. The output packet signal is output to the signal processing unit 438.
In the terminal interface unit 448, processing such as buffering is performed. Terminal interface unit 44
At 8, processing such as code conversion is performed, output to the outside of the switching device, and sent to a terminal connected via a cable. The exchange operation is performed as described above.

The above-described switching device is mounted as shown in FIGS. 6 and 7 show an actual LSI configuration and a board mounting method in the circuit of FIG. 5, reference numeral 501 denotes a replacement board, 502 and 503 denote terminal interface boards, 504 denotes a CPU board,
05 is a back board and 510 is a replacement LSI.

Reference numerals 511 to 518 denote signal processing LSIs 521 in which a reception signal processing unit and a transmission signal processing unit are integrated.
528 are terminal interfaces LS in which the receiving terminal interface and the transmitting terminal interface are integrated.
Reference numerals I and 531 to 538 denote connectors for connecting to terminals outside the exchange device by cables.

In the structure in which the terminal interface boards 502 and 503 are divided into two as shown in FIGS. 6 and 7, 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 exchange. It is often adopted in such cases. In this example, only four channels of connectors can be mounted on a single board due to the physical size of the connector, and the terminal interface board has a two-piece configuration of 502 and 503.

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 is configured to be accommodated in one board.

Since transmission between the exchange board 501 and the terminal interface boards 502 and 503 is difficult at a signal speed of 622.08 Mbps, the signal processing LSIs 511 to 51
8, the transmission rate is reduced to, for example, 1/8, and 8 bits 77.7
A 6 Mbps signal is transmitted between the boards. On the other hand, CP
A relatively low-speed signal is transmitted between the U board 504 and the other boards 501, 502, and 503, and is transmitted by a bus signal of several tens of bits from one end of the backboard to the other.

As described above, the exchange device includes a plurality of boards 50.
1 to 504 are connected in parallel via a back board 505.

The structure in which a plurality of circuit boards are detachably used as described above is advantageous in terms of maintenance and repair, and is widely used not only in replacement devices but also in computers and electronic equipment.

[0017]

The replacement board 50 shown in FIG.
1 shows the wiring (a) and the wiring (b).
The wiring length of the wiring (a) is shorter than that of the wiring (b) because of the physical positional relationship between the wiring and the LSIs 511 and 514. However, in the case of a switching device, since the LSI 510 synchronously processes input signals from the respective channels, it is necessary to perform equal-length wiring to make the input phases of the respective input signals uniform. Therefore, in such a case, in the related art, a pattern arrangement may be performed such that the wiring (a) having a short wiring length is purposely adjusted to the length of the wiring (b) having a long wiring length. Thus, there has been a problem that problems such as waveform deterioration are further increased.

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

When high-speed signals are wired to the backboard in this way, the wiring length becomes long and a problem of causing waveform deterioration occurs. Therefore, the boards are directly connected by a connector or a cable, or a coaxial cable is connected to a part of the backboard. Attempts have been made to transmit high-speed signals, for example, by using a structure that can be connected.

However, when the boards are directly connected by a connector or a cable, there arises a problem that only one board cannot be inserted or removed. Further, when the coaxial cable is connected to the backboard, there is a problem that the problem of the wiring length in the board cannot be solved.

An object of the present invention is to make it possible to easily realize the shortest and equal-length circuit board wiring length without impairing the detachability and maintainability of the circuit board, to ensure high-speed signal transmission, An object of the present invention is to make it easy to attach and detach a substrate.

[0022]

According to the present invention, there is provided a circuit board mounting mechanism and a circuit board mounting method, wherein an edge of a circuit board inserted into and removed from a slot intersects with a board inserting and removing direction. A first connector to be inserted and withdrawn in the direction of insertion is mounted, a second connector coupled to the first connector is mounted to a connector support, and the connector support is connected to the first connector and the second connector. The first and second connectors are configured to be moved in the insertion / extraction direction so as to be inserted / extracted.

Alternatively, the connector supporting portion is manually operated by an operating member near the slot.

Alternatively, a configuration is employed in which a predetermined driving source generates a driving force for operating the connector supporting portion.

Alternatively, the drive source is controlled to be driven in accordance with insertion and removal of the board from the slot.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A problem in the conventional switching apparatus is that circuits to be logically wired radially cannot be radially wired in terms of mounting. For example, in a conventional circuit board mounting / removing structure, a circuit board is slid to connect a connector of the circuit board to a connector provided on a backboard or the like. Can not.

The present invention solves such a conventional problem by a structure in which a circuit to be ideally wired radially can be radially wired / mounted on mounting.

That is, a first circuit board inserted into and removed from an edge of a circuit board inserted into and removed from the slot in a direction intersecting the board inserting and removing direction.
And a second connector coupled to the first connector is mounted on a connector supporting portion, and the first and second connectors are inserted into and removed from the connector supporting portion by inserting and removing the first connector and the second connector. The second connector is moved in the insertion / removal direction.

As described above, by arranging not only the rear end of the conventional circuit board but also an edge portion of the circuit board inserted into and removed from the slot, for example, a side edge, a connector inserted and removed in a direction intersecting with the board inserting and removing direction. The wiring pattern, which had to be arranged only toward the back of the board, is directed to the side edge, and a wiring area can be provided on the side of the board, so that circuits that should be radial in theory should be radially mounted on mounting be able to.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 shows a structure in which a main component of a housing, particularly a circuit board, is detachably mounted in an exchange apparatus or a computer apparatus of the present invention.

In FIG. 1, reference numerals 101 to 104 denote supports, 111 to 119 denote connector supports, 121 to 126.
Is a guide rail, and 131 to 141 are multi-core cables with connectors at both ends. Other members constituting the housing, such as a top plate, a bottom plate, a surface panel, a side panel, a reinforcing plate, a power supply, a fan, and screws, not shown, are columns 101 to 104.
Attach as necessary around

FIGS. 2 and 3 show the configuration of a board (circuit board) to be attached to the housing of FIG. 1. FIG. 2 is a perspective view of the board, and FIG. 3 is a sectional view. In FIG.
1 is a printed circuit board, 202 is a replacement LSI, 203 to 21
0 is a signal processing LSI, and 211 to 220 are multi-core connectors.

Reference numerals 223 and 224 in FIG. 3 denote guides provided on the side edges of the lower surface of the substrate, and the rails 121 to 126 in FIG.
, And slides the board along the slot, and functions as a guide member when mounting.

Reference numerals 221 and 222 denote ejectors for attaching and detaching the board. Although detailed structures are omitted, the ejectors are usually constituted by lever members rotatably mounted on the left and right of the front end of the board. Raising causes the connector at the rear end of the board to be uncoupled, and operates to remove the board from the slot. When the board is mounted, the ejector 2
Reference numerals 21 and 222 move to the standby position by the force of pushing the board into the slot.

As shown in FIG. 2, signal processing LSIs 203 to 210 are arranged around the switching LSI 202, and the corresponding connectors 211 to 220 are connected to the signal processing LSIs 203 to 21.
By arranging them on the edge of the substrate closest to zero, a plurality of signal patterns can be wired on the board with the shortest and equal lengths. High-speed signals can be reliably transmitted without causing a phase shift or waveform deterioration.

In FIG. 1, connector support portions 111 to 1
Reference numeral 19 denotes a connector portion of the multi-core cables 131 to 141 with connectors at both ends, which is fixed.
11 to 113 are fixed to the columns 102 and 103, and the connector supports 114 to 119 are movable in the direction of the arrow.

The connector supporting portions 114 to 119 are mounted on the board 2
When the board 201 is not inserted into the slot of the housing, it is positioned in the outer direction of the arrow. Multi-core cable 1
The connector portions 34 to 141 are fitted with the multi-core connectors 212 to 219 on the board 201.

When the board 201 is inserted into the slot, the guides 223 and 224 are passed through the guide rails 122 and 125 of the second slot, for example, so that the ejector 221 and the
222, a multi-core cable 132 with connectors at both ends,
133 and the multi-core connector 2 on the board 201
15 and 216 are inserted into the slots so that they fit tightly.

When the board is inserted into each slot and the connectors of the multi-core cables 131 to 141 with connectors at both ends are fitted with the multi-core connectors on each board, the replacement LSI 202
Is transmitted to the uppermost board through the signal processing LSIs 203 to 210 and further to the uppermost board through the multi-core cables 133 to 139 with connectors at both ends, and eight signals are transmitted over substantially the same transmission distance.

As described above, a high-speed signal can be reliably transmitted without causing a phase shift or waveform deterioration. That is, according to the present embodiment, a connector to be inserted and removed in a direction intersecting with the board insertion and removal direction is mounted. Therefore, the restriction on the circuit pattern arrangement on the circuit board can be greatly relaxed, the shortest and equal-length wiring length of the circuit board can be easily realized, and high-speed signal transmission can be reliably performed.

Next, a description will be given of a method of moving the connector supporting portions 114 to 119 for attaching and detaching the connector on the side edge of the board. In the case of a rack-type device, the user works on the front surface of the device (for example, the right front side in FIG. 1) for inserting and removing the board.

Connector support portions 114 to 119 on the side of the housing
It is preferable to be able to work from the front also with respect to the movement of the connector. However, the connector supporting portions 114 to 119 on the side of the housing can be attached and detached from the front of the housing by the structure shown in FIG.

FIG. 4 shows the detailed structure of the connector supporting portions 114 to 116. The upper part of FIG. 4 shows the upper surface of the device,
The lower part of FIG. 4 is an arrow view taken along the dashed line ZZ.

In FIG. 4, reference numeral 301 denotes a rotating lever,
302 is a shaft, 303 to 307 are levers, 308 is a rail, 309 is a multi-core cable with connectors at both ends, 310 is a multi-core connector, and 311 is a board (the printed circuit board 2 in FIG. 2).
01).

The rotation lever 301 and the lever 303 are
2 fixed. The lever 303 has a hole, and the lever 304 is moved so that the connection point B moves through the hole.
Is combined with The lever 304 is rotatably connected to a lever 305 at a connection point C and further to a lever 306 and a fulcrum D.

The lever 307 is connected to the lever 305 at the connection point E.
Further, the lever 306 and the fulcrum F are rotatably connected to each other. The rail 308 is connected to the lever 307 such that the connection point G moves through the hole of the lever 307. As shown, one lever 303 to 307 is arranged on each of the front and rear sides of the apparatus, and the shaft 302 and the rail 308 are connected in front and rear.

A multi-core cable 309 with connectors at both ends is mounted on the rail 308 at a position corresponding to the multi-core connector 310 on the board 311.

The position of the rotating lever 301 is shown at the left and right positions of the middle and lower slots in FIG. 1 (not shown, but the connector supporting portion 11 is also located at the upper stage).
Needless to say, a rotary lever 301 for operating the shutters 4 and 117 is provided). The rotation lever 301 exposes a main part thereof to the outside of the apparatus so that it can be operated when a connector on the side edge of the board is inserted or removed. The shape of the rotary lever 301 does not need to be a dial shape as shown in the figure, but may be any suitable shape if it is convenient for operation.

When the board 311 is mounted, the board 31
1 denotes guides 223 and 224 and guide rails 122 and 12
5 (when mounted in the middle section of FIG. 1) is engaged and fed from the front of the apparatus. As a result, the multi-core connectors 215 and 216 at the rear end of the board are connected to the connector support 112 (the middle part in FIG. 1).
At the connector portion of the multi-core cable 309 with connectors at both ends.

Further, the connectors on the side edges of the board are connected by operating the connector support portions 114 to 116 in FIG.

That is, when the rotation lever 301 in FIG. 4 is rotated clockwise in the direction a, the shaft 302 is similarly rotated, and the lever 303 is rotated about the fulcrum A in the direction b. The connection point B moves in the direction c in the elongated hole of the lever 303 and rotates in the direction d around the fulcrum D. The lever 305 moves the connection point E with respect to the movement of the connection point C in the d direction,
It is rotated in the e direction about the fulcrum F. Lever 307
Tries to move the connection point G in the f direction,
Is moved only in the g direction by a guide (not shown), so that the connection point G moves in the g direction,
The connector portion of the multi-core cable 309 with connectors on both ends attached to the rail 308 fits with the multi-core connector 310 on the board 311.

When the connector is disengaged, when the rotating lever 301 is rotated counterclockwise, each mechanism operates in the opposite direction to the above, and the connectors 309 and 310 are separated.

Of course, the connector supporting portions 117 to 117 shown in FIG.
4 is used as 119, and the connector on the side edge of the board is attached and detached by the same operation as described above.

In this way, when the board is inserted into the slot and the ejector firmly fits the board into the connector on the back, the left and right rotary levers are rotated to fit the connectors on the side, and the board is taken out. After the left and right rotation levers are turned to disconnect the side connector, the board can be pulled out by the ejector.

According to the structure shown in FIG. 4, even when a connector which is inserted and removed in a direction different from the insertion and removal direction of the circuit board is provided at a position on the side of the circuit board which is convenient for signal transmission, the connector can be easily inserted and removed. According to the present embodiment, a direct connection is not used as in the related art, and the substrate can be easily attached and detached. Therefore, there is no possibility that the maintainability is impaired. Moreover,
According to the present embodiment, by arranging the pattern and the coaxial cable on the circuit board as shown in FIGS. 1 and 2, a high-speed signal can be reliably transmitted without causing a phase shift or waveform deterioration.

[Second Embodiment] In the above embodiment, the rotary lever 3 is used to operate the connector on the side edge of the board.
Although the manual operation of the connector 01 is premised, the insertion / removal of the connector on the side edge of the board can be automated using a driving force of a motor or the like by the following structure.

FIG. 8 shows the structure around the connector support portions 114 to 116 in the same manner as in FIG. 8, reference numeral 601 denotes a gear, 602 denotes a motor, 603 denotes a motor control unit, 604 denotes a contact detection unit, and the other parts are the same as those in the first embodiment. The detailed description is omitted.

In this embodiment, the connector support is operated by the power of the motor. Hereinafter, the operation of the connector support will be described.

The contact detecting section 604 is attached to, for example, the ejectors 221 and 222, and detects that the board has been inserted into the connector on the rear surface based on the rotation angle. Alternatively, the contact detection unit 604 may be attached to the connector on the back, and in this case, detects that the board has been inserted into the connector on the back.

The detection signal from the contact detection section 604 is supplied to the motor control section 603 to operate the motor 602. The rotation of the motor 602 is controlled by the gear
Is transmitted to each unit in the same operation as in the first embodiment,
The connector support section operates, and the connector section of the multi-core cable 309 with connectors at both ends is connected to the multi-core connector 310 on the board 311.

The motor control unit 603 operates when the connector is connected and the motor 602 stops operating.
Or to control the rotation of the motor 602 in advance.
The motor 602 may be stopped at the rotation speed at which the multi-core connector is connected.

On the other hand, when removing the board from the slot,
A switch or the like (not shown) is operated to notify the contact detection unit 604 of the removal, or the ejectors 221 and 22
2 is detected by the contact detection unit 404, and the motor 602 is rotated in the reverse direction to the above, so that the connector portion of the multi-core cable 309 with connectors on both ends and the board 31 are rotated.
1 is separated. Thereafter, the board may be pulled out by the ejectors 221 and 222.

As described above, the connector on the side edge of the board is connected by the driving force of the motor simply by pushing the circuit board into the slot without the need for manual operation, as in the conventional case. By operating 221 and 222, the connector on the side edge of the board can be pulled out,
Operability can be improved.

In each of the above embodiments, the rotation of the manually operated rotation lever or the rotation of the gear is converted into the movement of the connector on the side edge of the board by the connector support (FIGS. 4 and 8). I have. However, the configuration for converting the rotational movement into the movement of the connector in the insertion / removal direction is not essential, and the movement converted into the movement in the insertion / removal direction of the connector is, for example,
It may be a reciprocating (linear) movement generated by a manually operated push button, a solenoid driven by a switch / ejector, or the like.

For example, by converting the movement of the board to be inserted / removed into a movement for moving the connector on the board side edge in the insertion / removal direction through an appropriate link mechanism, the connector on the board side edge can be connected only by inserting / removing the board. Can be fitted / separated.

[0067]

As is apparent from the above description, according to the present invention, in the circuit board mounting mechanism and the circuit board mounting method, the edge of the circuit board to be inserted into and removed from the slot in the direction intersecting with the board inserting and removing direction. A first connector to be inserted / removed is mounted, a second connector coupled to the first connector is mounted on a connector support, and the first connector and the second connector are connected and disconnected from the connector support. The first
The first connector is inserted and removed in a direction intersecting with the board insertion / extraction direction. That is, the connector is conventionally arranged due to the limitation of the board insertion / extraction mechanism. Since the wiring of the circuit board can be arranged also at the edge of the circuit board that could not be done, the restriction on the circuit pattern arrangement on the circuit board is greatly relaxed, and the shortest and equal length of the circuit board wiring can be easily realized. Thus, an excellent effect of reliably transmitting a high-speed signal can be obtained.

Alternatively, the connector supporting portion is manually operated by an operating member near the slot.
Alternatively, or further, a configuration for generating a driving force for operating the connector support portion by a predetermined driving source, or
By adopting a configuration in which the drive source is drive-controlled in accordance with insertion and removal of the board from the slot, the circuit board can be easily attached and detached.

[Brief description of the drawings]

FIG. 1 is a perspective view showing main components of a housing in an exchange device of the present invention.

FIG. 2 is a perspective view showing a configuration of an exchange board to be attached to the housing of FIG. 1;

FIG. 3 is a sectional view showing a configuration of an exchange board to be attached to the housing of FIG. 1;

FIG. 4 is an explanatory diagram showing a configuration of a connector support section of the first embodiment.

FIG. 5 is a block diagram showing a circuit configuration of the switching device.

FIG. 6 is a block diagram showing an LSI configuration and a board configuration of a conventional switching device.

FIG. 7 is a schematic diagram showing a method for mounting a conventional switching device.

FIG. 8 is an explanatory diagram illustrating a configuration of a connector support section according to a second embodiment.

[Explanation of symbols]

101-104 Supports 111-119 Connector support 121-126 Guide rails 131-141, 309-311 Fine coaxial cable with connectors at both ends 201 Printed circuit boards 202, 401, 510 Replacement LSIs 203-210, 421-428, 431-438, 5
11 to 518 Signal processing LSIs 211 to 220 Multi-core connector 221, 222 Ejector 223, 224 Guide 301 Rotating lever 302 Shaft 303 to 308 Lever 502, 503 Terminal interface board 501 Replacement board 504 CPU board 531 to 538 Connectors 411 to 418, 441 to 448, 521 to 528 Terminal interface LSI 601 Gear 602 Motor 603 Motor control unit 604 Contact detection unit

Claims (8)

[Claims] 1. A slot for inserting and removing a circuit board, a circuit board having a first connector on an edge portion to be inserted and removed in a direction intersecting with the board inserting and removing direction, and a second connector coupled to the first connector A circuit board mounting mechanism, comprising: a connector support portion to which a first connector and a second connector are attached and moved to insert and remove the first connector and the second connector in the insertion and removal directions of the first and second connectors. 2. The circuit board mounting mechanism according to claim 1, wherein said connector support portion is manually operated by an operation member near said slot. 3. The circuit board mounting mechanism according to claim 1, further comprising a driving source for generating a driving force for operating said connector supporting portion. 4. The circuit board mounting mechanism according to claim 3, further comprising control means for controlling the drive of the drive source in accordance with insertion and removal of the board from the slot. 5. A first connector which is inserted and removed in a direction intersecting with the board insertion and removal direction is mounted on an edge of a circuit board which is inserted into and removed from a slot, and a second connector is connected to the first connector at a connector support portion.
And mounting and displacing the connector support in the direction of insertion and removal of the first and second connectors so as to insert and remove the first connector and the second connector. 6. The method according to claim 5, wherein the connector support is manually operated by an operation member near the slot. 7. A driving force for operating said connector support portion by a predetermined driving source.
The circuit board mounting method according to 1. 8. The method according to claim 7, wherein the driving of the driving source is controlled in accordance with insertion and removal of the board from the slot.