JP2010027705A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accelerate a signal transmission speed between circuit board units in an electronic device with a plurality of circuit board units. <P>SOLUTION: The electronic device includes: the plurality of circuit board units detachable from the electronic device; a relay circuit board which is installed in the electronic device and electrically connects the circuit board units to each other; and a cable which is installed in the electronic device and electrically connects the circuit board units to each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device, and more particularly to an electronic device having a plurality of removable circuit board units.

  Switches and routers are widely used as network communication devices that perform data transfer in a network. In general, a network communication device such as a switch or a router includes a circuit board unit having an interface function for data transfer in a network, a circuit board unit having a control function for controlling data transfer, and the like. The unit is removable. The exchange of signals (for example, data and control signals) between the circuit board units in a state where the circuit board unit is installed in the network communication device is executed via a relay circuit board (so-called back board) (for example, Patent Documents). 1).

JP 2007-266528 A

  In recent years, there has been a demand for further improvement in the transmission speed of signals between circuit board units in network communication devices. In order to further improve the signal transmission speed between circuit board units, for example, by using an insulating material with a small dielectric loss or increasing the number of layers, the signal transmission speed in the relay circuit board is improved. This is not easy because of restrictions, an increase in manufacturing cost, and complicated wiring.

  Such a problem is not limited to a network communication device such as a switch or a router, but is a problem common to an electronic device having a plurality of removable circuit board units.

  The present invention has been made to solve the above-described conventional problems, and provides a technique capable of improving a signal transmission speed between circuit board units in an electronic apparatus having a plurality of circuit board units. For the purpose.

  In order to solve at least a part of the above problems, the present invention can be realized as the following forms or application examples.

Application Example 1 An electronic device,
A plurality of circuit board units removable from the electronic device;
A circuit board for relay for electrically connecting the circuit board units installed in the electronic device;
And a cable for electrically connecting the circuit board units installed in the electronic device.

  The electronic device includes a plurality of circuit board units, and electrically connects between the circuit board units installed in the electronic device and the circuit board for relay that electrically connects the circuit board units installed in the electronic device. Since the cable is connected to the circuit board unit, the signal transmission speed between the circuit board units can be improved.

Application Example 2 The electronic device according to Application Example 1,
The circuit board unit and the relay circuit board are fitted to the first board unit side connector installed in the circuit board unit, the relay circuit board and the first board unit side connector. Connected via a first connector pair including a connectable relay board side connector,
The circuit board unit and the cable include a second board unit side connector installed in the circuit board unit, and a cable side connector that is connected to the cable and can be fitted to the second board unit side connector. And an electronic device connected via a second connector pair.

  In this electronic device, it is possible to improve the signal transmission speed between the circuit board units in the electronic apparatus including a plurality of detachable circuit board units.

[Application Example 3] The electronic device according to Application Example 2,
The electronic device, wherein the first board unit side connector and the second board unit side connector are arranged on an edge of the circuit board unit on the circuit board side.

  In this electronic device, it is possible to prevent the mounting area of other elements from being restricted or the mounting density from being reduced by the first board unit side connector and the second board unit side connector, and A decrease in maintainability can be suppressed, and the amount of cables to be used can be suppressed to a minimum.

Application Example 4 The electronic device according to Application Example 2 or Application Example 3, further comprising:
An electronic device comprising an adapter that forms a submodule together with the cable and the cable side connector.

  In this electronic device, it is possible to improve the wiring workability of the cable, improve the workability when incorporating the submodule into the electronic device, suppress the occurrence of defects such as cable breakage, and improve the mounting density. The workability of replacement is also improved.

Application Example 5 The electronic device according to Application Example 4,
The adapter is an electronic device fixed to the relay circuit board.

  In this electronic device, it is possible to improve workability when the submodule is incorporated into the electronic device.

Application Example 6 The electronic device according to Application Example 5,
At least one of the cable-side connector and the second board unit-side connector has a floating structure that can move in a predetermined direction to a predetermined movement amount.

  In this electronic device, it is possible to easily realize both good fitting in the first and second connector pairs regardless of the positional relationship between the cable side connector and the relay board side connector.

Application Example 7 The electronic device according to any one of Application Example 2 to Application Example 6,
The position of the second board unit side connector in the circuit board unit is a position farther from the relay circuit board than the position of the first board unit side connector.

  In this electronic device, it is possible to achieve both the securing of the cable wiring space and the suppression of a decrease in mounting density in the electronic device.

[Application Example 8] The electronic device according to Application Example 7,
A notch is formed on the edge of the circuit board unit on the circuit board side for relay,
The second board unit side connector is an electronic device arranged at a position where the notch of the circuit board unit is formed.

  In this electronic device, it is possible to easily realize the arrangement of the second board unit side connector so that it is located farther from the relay circuit board than the position of the first board unit side connector.

[Application Example 9] The electronic device according to Application Example 7,
The circuit board unit includes a main circuit board in which the first board unit side connector is disposed at an edge on the relay circuit board side, and an edge on the relay circuit board side that is used for the relay rather than the main circuit board. A sub-circuit board that is disposed on the main circuit board so as to be located away from the circuit board and in which the second board unit-side connector is disposed at an edge on the relay circuit board side, apparatus.

  In this electronic device, it is possible to easily realize the arrangement of the second board unit side connector so that the second board unit side connector is located farther from the relay circuit board than the position of the first board unit side connector. Improvements can be made.

Application Example 10 The electronic device according to any one of Application Example 1 to Application Example 9,
The electronic device is a network communication device for transferring data in a network;
At least one of the circuit board units has an interface function for transferring the data;
At least one of the circuit board units is an electronic device having a control function for controlling transfer of the data.

  In this electronic device, the signal transmission speed between circuit board units can be improved in the network communication device.

Application Example 11 In the electronic device according to Application Example 10,
Transmission of the data between the circuit board units is performed via the cable,
Transmission of a signal for the control between the circuit board units is performed through the relay circuit board.

  In this electronic device, in a network communication device, data transmission between circuit board units is performed via a cable, and signal transmission for control between circuit board units is performed via a relay circuit board. The signal transmission speed between the circuit board units can be improved.

  Note that the present invention can be realized in various modes, for example, an electronic device, a network communication device, a signal transmission method in the electronic device or the network communication device, and a function of these methods or devices. The present invention can be realized in the form of a computer program, a recording medium recording the computer program, a data signal including the computer program and embodied in a carrier wave, and the like.

  Next, embodiments of the present invention will be described based on first to second examples and modifications.

A. First embodiment:
FIG. 1 is an explanatory diagram schematically showing a configuration of a switch 100 as an electronic device according to the first embodiment of the present invention. The switch 100 of this embodiment functions as a network communication device that transfers data (for example, called a frame or a packet) in a computer network.

  FIG. 1A shows a front perspective view of the switch 100, and FIG. 1B shows a rear perspective view of the switch 100. As shown in FIGS. 1A and 1B, the switch 100 includes a plurality of circuit board units 120, a plurality of power supply units 130, and a relay circuit board 140 in a housing 110. Have. 1A and 1B also show components of the switch 100 that are actually installed inside the housing 110 and cannot be seen from the outside. In FIG. 1B, the power supply unit 130 is not shown. The switch 100 may further include a cooling unit.

  The circuit board unit 120 is configured by a circuit board on which a semiconductor element is mounted, and realizes various functions for data transfer by the switch 100. The switch 100 of the present embodiment has four circuit board units 120, and two circuit board units 120 (hereinafter also referred to as “interface units”) arranged at the uppermost and lowermost stages of the switches are network. The remaining two circuit board units 120 (hereinafter also referred to as “control units”) have a control function for controlling data transfer. The number of circuit board units 120 included in the switch 100 is not limited to four. For example, the switch 100 may have one or three or more interface units, and may have one or three or more control units. The switch 100 may include a circuit board unit 120 having other functions used for data transfer by the switch 100.

  The circuit board unit 120 is configured to be insertable / removable along a slot (not shown) formed in the casing 110 of the switch 100. That is, the circuit board unit 120 is installed in the switch 100 by being inserted toward the rear surface side of the switch 100 from the opening of the slot provided on the front surface side of the switch 100. Further, the installed circuit board unit 120 can be removed from the switch 100 by being extracted toward the front side of the switch 100. Thereby, the function expansion of the switch 100 and the improvement of redundancy can be aimed at. In FIG. 1A and FIG. 1B, one uppermost circuit board unit 120 is removed from the switch 100, and the remaining three circuit board units 120 are installed in the switch 100. Is shown.

  FIG. 1C shows a plan view of the circuit board unit 120. As shown in FIGS. 1A to 1C, the circuit board unit 120 has a board unit side connector 122 for connection to the relay circuit board 140 and a cable 150 to be described later. A board unit side connector 124 and an external interface connector 126 for connection to an external interface are provided. The external interface connector 126 is disposed on the edge of the front side of the circuit board unit 120 (the side opposite to the relay circuit board 140). On the other hand, the board unit side connector 122 and the board unit side connector 124 are arranged at the edge of the rear surface side (the relay circuit board 140 side) of the circuit board unit 120. A notch 170 is formed in the rear surface side edge of the circuit board unit 120 (that is, a part of the rear surface side edge of the circuit board unit 120 is set back), and the board unit side connector 124 is notched 170. Is disposed in the formed portion. Therefore, the position of the board unit side connector 124 in the circuit board unit 120 is a position on the front side (position farther from the relay circuit board 140) than the position of the board unit side connector 122 (FIG. 1 (c). )reference). The board unit side connector 122 corresponds to the first board unit side connector in the present invention, and the board unit side connector 124 corresponds to the second board unit side connector in the present invention.

  The power supply unit 130 is installed on the rear side of the relay circuit board 140 in the housing 110 and supplies power to the circuit board unit 120. Note that a plurality of power supply units 130 need not be installed in the switch 100, and only one power supply unit 130 may be installed.

  The relay circuit board 140 is a circuit board (so-called backboard) that electrically connects the circuit board units 120 and relays signals exchanged between the circuit board units 120. The relay circuit board 140 is fixed inside the casing 110 of the switch 100 in a direction substantially perpendicular to the axis from the front surface to the rear surface of the switch 100. The relay circuit board 140 has four relay board side connectors 142 corresponding to the four circuit board units 120 on the front surface. The position of the relay board side connector 142 is such that when the circuit board unit 120 is installed in the switch 100, the relay board side connector 142 is fitted to the board unit side connector 122 of the circuit board unit 120. One board unit side connector 122 and one relay board side connector 142 are configured as a socket and the other as a header, and are connected to each other and electrically connected to each other (the present invention). 1st connector pair). Since the relay circuit board 140 has a wiring (not shown) for connecting the relay board side connectors 142, when the relay board side connector 142 and the board unit side connector 122 are fitted, the board unit side connector 122 is connected. In addition, the circuit board units 120 are electrically connected to each other via the relay board side connector 142 and the relay circuit board 140, and signals can be exchanged between the circuit board units 120.

  As shown in FIGS. 1A and 1B, an adapter 160 is fixed to the relay circuit board 140. FIG. 2 is an explanatory diagram schematically showing the configuration of the adapter 160. 2A shows a front perspective view of the adapter 160 fixed to the relay circuit board 140, and FIG. 2B shows a cross-sectional view of the relay circuit board 140 and the adapter 160. As shown in FIG. . The adapter 160 includes a plate-shaped base portion 162 and two plate-shaped teeth portions 164 that are substantially perpendicular to the base portion 162 and parallel to each other. The base portion 162 has a rectangular shape slightly larger than the rectangular hole portion 148 formed in the relay circuit board 140.

  Four cable-side connectors 152 corresponding to the four circuit board units 120 are installed at the front end portion of the tooth portion 164 of the adapter 160. FIG. 3 is an explanatory diagram showing, in an enlarged manner, the configuration of the connection location between the cable-side connector 152 and the adapter 160. In the present embodiment, the joint portion of the cable-side connector 152 with the adapter 160 has a floating structure. That is, the floating fastener 180 is press-fitted into the front end face of the tooth portion 164 of the adapter 160, and the cable-side connector 152 is fixed to the adapter 160 with the screw 190 via the floating fastener 180. Therefore, the cable-side connector 152 has a play at the joint with the adapter 160, and can be moved by a predetermined amount of movement in the vertical and horizontal directions and the longitudinal direction.

  As shown in FIG. 2A, the cable side connectors 152 are electrically connected by a cable 150. In the present embodiment, the two cable-side connectors 152 in the second and third stages from the top are connected one-to-one via the other three cable-side connectors 152 and the cables 150, respectively. The two cable-side connectors 152 at the uppermost stage and the lowermost stage are connected one-to-one via the two cable-side connectors 152 and the cables 150 in the second and third stages from the top, respectively.

  The adapter 160, the cable side connector 152, and the cable 150 are sub-moduleed. That is, when the switch 100 is manufactured, a sub module in which the cable 150 and the cable-side connector 152 are connected and the cable-side connector 152 is connected to the adapter 160 is manufactured. Thereafter, the adapter 160 is fixed to the relay circuit board 140 with screws 240 in a state where the base portion 162 of the adapter 160 contacts the rear surface side of the relay circuit board 140 and the tooth portion 164 protrudes from the hole 148 to the front surface side. As a result, the submodule is integrated with the relay circuit board 140. The adapter 160 has a shape and dimensions that do not affect the mounting of the power supply unit 130 and that can secure a cable 150 routing space for ensuring the reliability of the cable 150.

  The position of the cable-side connector 152 is such that when the circuit board unit 120 is installed in the switch 100, the cable-side connector 152 is fitted to the board unit-side connector 124 of the circuit board unit 120. One board unit side connector 124 and one cable side connector 152 are configured as a socket and the other as a header, and are connected to each other to be electrically connected to each other (second connector in the present invention). Connector pair). When the cable side connector 152 and the board unit side connector 124 are fitted, the circuit board unit 120 is electrically connected via the board unit side connector 124, the cable side connector 152, and the cable 150. Signal exchange between them becomes possible. As described above, the two cable-side connectors 152 in the second and third stages from the top are connected one-to-one via the other three cable-side connectors 152 and the cables 150, respectively. The two cable-side connectors 152 at the uppermost and lowermost stages are connected one-to-one via the cable 150 and the two cable-side connectors 152 at the second and third stages from the top, respectively. The two circuit board units 120 (control units) at the second stage and the third stage are electrically connected to the other three circuit board units 120, respectively, and two circuits at the uppermost stage and the lowermost stage are respectively connected. Each board unit 120 (interface unit) is electrically connected to two control units.

  Here, when the circuit board unit 120 is installed in the switch 100, in addition to the fitting of the cable side connector 152 and the board unit side connector 124 (fitting of the second connector pair), the relay is performed as described above. The board-side connector 142 and the board unit-side connector 122 are also fitted (fitting of the first connector pair). In order to achieve both good two fittings, it is required that the positional relationship between the header and the socket in the two connector pairs be a positional relationship that allows the fitting. However, since the cable-side connector 152 is integrated with the relay circuit board 140 via the adapter 160, the positional relation between the cable-side connector 152 and the relay board-side connector 142 is accurately set to a preset positional relation. It is not easy to set (suppress variation in positional relationship), and it is not easy to set the positional relationship between the header and the socket in two connector pairs at the same time so that they can be fitted. In this embodiment, since a floating structure is employed at the joint between the cable-side connector 152 and the adapter 160, two connectors can be used regardless of the positional relationship between the cable-side connector 152 and the relay board-side connector 142. In the pair, the positional relationship between the header and the socket can be made into a positional relationship that allows the mating to be performed at the same time.

  As described above, in the switch 100 of this embodiment, the electrical connection between the circuit board units 120 is realized through the relay circuit board 140 and also through the cable 150. Therefore, in the switch 100, it is possible to exchange signals between the circuit board units 120 using both the path via the relay circuit board 140 and the path via the cable 150. In general, the exchange of signals is faster through the cable 150 than through the relay circuit board 140. Therefore, in the switch 100 of this embodiment, the signal transmission speed between the circuit board units 120 can be improved. Of the signal transmissions between the circuit board units 120 in the switch 100, transmission of high-speed signals (for example, data to be transferred by the switch 100) is performed by a route through the cable 150 without passing through the relay circuit board 140, and low-speed signals are transmitted. Transmission of (for example, a control signal for controlling data transfer) is performed by a route through the relay circuit board 140, whereby high-speed data transfer in the switch 100 can be realized.

  Further, in the switch 100 of this embodiment, in the circuit board unit 120, in addition to the board unit side connector 122, the board unit side connector 124 is also arranged at the edge on the rear surface side (relay circuit board 140 side). The presence of the board unit side connector 124 for forming a signal transmission path via 150 can suppress the mounting area of the external interface connector 126 and the semiconductor element or the mounting density from being reduced, and It is possible to suppress the ease of maintenance of the circuit board unit 120 from being lowered by the board unit side connector 124 and the cable 150. In addition, the amount of cable 150 to be used can be minimized.

  Further, in the switch 100 of this embodiment, the cable 150, the cable-side connector 152, and the adapter 160 can constitute a submodule. When the switch 100 is manufactured, the manufactured submodule is used as a relay circuit. It is integrated with the substrate 140. Therefore, in the switch 100 according to the present embodiment, the wiring workability of the cable 150 is improved, the workability when the submodule is incorporated into the switch 100, the occurrence of problems such as the disconnection of the cable 150 is suppressed, and the mounting density is improved. Can be planned. In addition, the workability of replacing the cable 150 can be improved.

  Further, in the switch 100 according to the present embodiment, the notch 170 is formed at the edge on the rear surface side of the circuit board unit 120, and the board unit side connector 124 is disposed at the portion where the notch 170 is formed. The position of the board unit side connector 124 in the circuit board unit 120 is a position on the front side of the board unit side connector 122 (a position farther from the relay circuit board 140), ensuring the wiring space of the cable 150 and the switch 100. Thus, it is possible to achieve both suppression of the mounting density drop.

B. Second embodiment:
FIG. 4 is an explanatory diagram schematically showing the configuration of a switch 100a as an electronic device according to the second embodiment of the present invention. The switch 100a of the second embodiment is different from the first embodiment shown in FIG. 1 in the configuration of the circuit board unit 120a. The other configuration of the switch 100a of the second embodiment is the same as that of the first embodiment.

  As shown in FIG. 4, the circuit board unit 120a of the switch 100a according to the second embodiment has a main circuit board 127 and a sub circuit board 128 installed on the main circuit board 127 (two-story structure). ) Is adopted. Both the main circuit board 127 and the sub circuit board 128 can be mounted with semiconductor elements.

  FIG. 5 is an explanatory diagram showing the configuration of the circuit board unit 120a in the second embodiment. 5A shows a front perspective view of the circuit board unit 120a, and FIG. 5B shows a plan view of the circuit board unit 120a. As shown in FIGS. 5A and 5B, in the circuit board unit 120a, the board unit side connector 122 is disposed on the edge of the main circuit board 127 on the rear surface side (the relay circuit board 140 side). . On the other hand, the board unit side connector 124 is arranged on the edge of the rear surface side (the relay circuit board 140 side) of the sub circuit board 128 installed on the main circuit board 127.

  Here, the sub circuit board 128 is installed on the main circuit board 127 so that the edge on the rear surface side of the sub circuit board 128 is located on the front side of the edge on the rear surface side of the main circuit board 127 (see FIG. 5 (b)). Therefore, the position of the board unit side connector 124 installed at the rear edge of the sub circuit board 128 is closer to the front side than the position of the board unit connector 122 installed at the rear edge of the main circuit board 127. The position (position farther from the relay circuit board 140). As shown in FIG. 2, since the tooth portion 164 of the adapter 160 is provided with a slit, the circuit board unit 120a is installed in the switch 100a, and the board unit side connector 124 and the cable side connector 152 are connected to each other. Even in the fitted state, the main circuit board 127 enters the slit of the adapter 160 and does not interfere with the adapter 160. Further, since the cable 150 is also wired with a predetermined deflection, the main circuit board 127 does not interfere with the cable 150.

  As described above, also in the switch 100a of the second embodiment, the board unit side connector 124 is positioned on the front side of the board unit side connector 122, so that the wiring space for the cable 150 is secured. And a reduction in mounting density in the switch 100a. Further, since the mounting area can be increased by the presence of the sub circuit board 128, the mounting density can be improved.

C. Variation:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

C1. Modification 1:
FIG. 6 is an explanatory diagram schematically showing the configuration of a switch 100b as an electronic device according to a modification of the present invention. The switch 100b in the modification shown in FIG. 6 is different from the first embodiment shown in FIG. 1 in the configuration of the circuit board unit 120b. That is, in the switch 100b according to the modification, the board unit side connector 122b for forming a signal transmission path via the cable 150 is arranged on the edge on the front side rather than the rear side on the circuit board unit 120b. The circuit board units 120b are connected via a board unit side connector 122b, a cable side connector 152b, and a cable 150.

  Also in the switch 100b of the modification shown in FIG. 6, between the circuit board units 120b using both the route via the relay circuit board 140 and the route via the cable 150, as in the switches of the above embodiments. Can be realized, and the signal transmission speed between the circuit board units 120b can be improved. However, in the switch 100b of the modified example, the mounting space for the external interface connector 126 is limited by the board unit side connector 122b disposed on the front side edge of the circuit board unit 120b, and the cable 150 installed on the front side is not connected. This may become an obstacle during maintenance of the switch 100b. Therefore, it is preferable that the board unit side connector 122 is disposed on the edge on the rear surface side of the circuit board unit 120 as in the above embodiments.

C2. Modification 2:
FIG. 7 is an explanatory diagram schematically showing the configuration of a switch 100c as an electronic device according to a modification of the present invention. FIG. 7A shows a perspective view of the front side of the switch 100c, and FIG. 7B shows a perspective view of the rear side of the switch 100c. The switch 100c in the modification shown in FIG. 7 is connected between the circuit board units 120 via the cable 150 in that the connection between the circuit board units 120 via the cable 150 is realized via the relay circuit board 140. Is different from the first embodiment shown in FIG. 1 in which the connection is directly realized without using the relay circuit board 140. That is, in the switch 100c in the modification, the rear connector 144 and the cable connector 152 installed on the rear surface side of the relay circuit board 140 constitute a connector pair, and the cable 150 connects between the cable connectors 152. Thus, the cable 150 connects the points of the relay circuit board 140 on the rear surface side of the relay circuit board 140.

  Also in the switch 100c of the modified example shown in FIG. 7, the exchange of signals between the circuit board units 120 using the path via the cable 150 can be realized in the same way as the switches of the above embodiments. The signal transmission speed between 120 can be improved. However, in the switch 100c of the modified example, the exchange of signals between the circuit board units 120 via the cable 150 is realized via the relay circuit board 140 and the rear side connector 144, and therefore the degree of improvement in the signal transmission speed is as described above. In addition to being inferior to the switch of each embodiment, a wiring space corresponding to the bending radius of the cable 150 is required on the rear surface side of the relay circuit board 140, so that the mounting density inside the switch 100c cannot be sufficiently improved. Therefore, it is preferable to directly realize the connection between the circuit board units 120 via the cable 150 without using the relay circuit board 140 as in the above embodiments.

C3. Modification 3:
In each of the above embodiments, a switch as an electronic device has been described as an example. However, the present invention can also be applied to a network communication device other than the switch 100 such as a router or an electronic device other than the network communication device. Also in this case, for example, among the signal transmissions between the circuit board units 120 of the electronic device, the high-speed signal transmission is performed not via the relay circuit board 140 but via the cable 150, and the low-speed signal transmission is relayed. By executing the path through the circuit board 140, high-speed data transfer in the electronic device can be realized.

C4. Modification 4:
In each of the above-described embodiments, the board unit side connector 122 and the board unit side connector 124 are arranged at the edge on the rear surface side of the circuit board unit 120, but such arrangement is not necessarily required. In each of the above-described embodiments, the cable 150, the cable-side connector 152, and the adapter 160 are configured to form a submodule. However, such a configuration is not necessarily required. Further, when the cable 150, the cable-side connector 152, and the adapter 160 are configured to form a submodule, the submodule does not need to be fixed to the relay circuit board 140, and other configurations such as the casing 110 It may be fixed to the element. In each of the above embodiments, the cable side connector 152 has a floating structure. However, instead of the cable side connector 152, the board unit side connector 124 that constitutes the second connector pair together with the cable side connector 152 is floating. It may have a structure. Alternatively, instead of the second connector pair, the relay board side connector 142 and the board unit side connector 122 constituting the first connector pair may have a floating structure.

  In each of the above embodiments, a configuration in which all four cable side connectors 152 are attached to one adapter 160 is adopted, but a configuration in which each of the four cable side connectors 152 is attached to a separate adapter is adopted. May be. Further, the cable-side connector 152 and the adapter 160 may be integrally formed.

  In each of the above embodiments, the circuit board unit 120 is arranged on the front side of the relay circuit board 140 and the power supply unit 130 is arranged on the rear side of the relay circuit board 140. The arrangement of the units can be arbitrarily changed. For example, both the circuit board unit 120 and the power supply unit 130 may be arranged on the front side of the relay circuit board 140, or both may be arranged on the rear side. Further, in each of the above embodiments, the circuit board unit 120 is mounted horizontally, but the circuit board unit 120 may be mounted vertically.

It is explanatory drawing which shows schematically the structure of the switch 100 as an electronic apparatus in 1st Example of this invention. It is explanatory drawing which shows the structure of the adapter 160 roughly. It is explanatory drawing which expands and shows the structure of the connection location of the cable side connector 152 and the adapter 160. FIG. It is explanatory drawing which shows roughly the structure of the switch 100a as an electronic device in 2nd Example of this invention. It is explanatory drawing which shows the structure of the circuit board unit 120a in 2nd Example. It is explanatory drawing which shows roughly the structure of switch 100b as an electronic device in the modification of this invention. It is explanatory drawing which shows roughly the structure of the switch 100c as an electronic device in the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Switch 110 ... Housing 120 ... Circuit board unit 122 ... Board unit side connector 124 ... Board unit side connector 126 ... External interface connector 127 ... Main circuit board 128 ... Sub circuit board 130 ... Power supply unit 140 ... Relay circuit board 142 ... Relay board side connector 144 ... Rear side connector 148 ... Hole part 150 ... Cable 152 ... Cable side connector 160 ... Adapter 162 ... Base part 164 ... Tooth part 170 ... Notch 180 ... Floating fastener 190 ... Bis 240 ... Bis

Claims (11)

An electronic device,
A plurality of circuit board units removable from the electronic device;
A circuit board for relay for electrically connecting the circuit board units installed in the electronic device;
And a cable for electrically connecting the circuit board units installed in the electronic device. The electronic device according to claim 1,
The circuit board unit and the relay circuit board are fitted to the first board unit side connector installed in the circuit board unit, the relay circuit board and the first board unit side connector. Connected via a first connector pair including a connectable relay board side connector,
The circuit board unit and the cable include a second board unit side connector installed in the circuit board unit, and a cable side connector that is connected to the cable and can be fitted to the second board unit side connector. And an electronic device connected via a second connector pair. The electronic device according to claim 2,
The electronic device, wherein the first board unit side connector and the second board unit side connector are arranged on an edge of the circuit board unit on the circuit board side. The electronic device according to claim 2 or 3, further comprising:
An electronic device comprising an adapter that forms a submodule together with the cable and the cable side connector. The electronic device according to claim 4,
The adapter is an electronic device fixed to the relay circuit board. The electronic device according to claim 5,
At least one of the cable-side connector and the second board unit-side connector has a floating structure that can move in a predetermined direction to a predetermined movement amount. An electronic device according to any one of claims 2 to 6,
The position of the second board unit side connector in the circuit board unit is a position farther from the relay circuit board than the position of the first board unit side connector. The electronic device according to claim 7,
A notch is formed on the edge of the circuit board unit on the circuit board side for relay,
The second board unit side connector is an electronic device arranged at a position where the notch of the circuit board unit is formed. The electronic device according to claim 7,
The circuit board unit includes a main circuit board in which the first board unit side connector is disposed at an edge on the relay circuit board side, and an edge on the relay circuit board side that is used for the relay rather than the main circuit board. A sub-circuit board that is disposed on the main circuit board so as to be located away from the circuit board and in which the second board unit-side connector is disposed at an edge on the relay circuit board side, apparatus. An electronic device according to any one of claims 1 to 9,
The electronic device is a network communication device for transferring data in a network;
At least one of the circuit board units has an interface function for transferring the data;
At least one of the circuit board units is an electronic device having a control function for controlling transfer of the data. The electronic device according to claim 10, comprising:
Transmission of the data between the circuit board units is performed via the cable,
Transmission of a signal for the control between the circuit board units is performed through the relay circuit board.

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