JP2021153366A - Electronic apparatus - Google Patents

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JP2021153366A
JP2021153366A JP2020053086A JP2020053086A JP2021153366A JP 2021153366 A JP2021153366 A JP 2021153366A JP 2020053086 A JP2020053086 A JP 2020053086A JP 2020053086 A JP2020053086 A JP 2020053086A JP 2021153366 A JP2021153366 A JP 2021153366A
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unit
substrate
connection
communication unit
current value
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友也 依田
Tomoya Yoda
友也 依田
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Nihon Dempa Kogyo Co Ltd
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Nihon Dempa Kogyo Co Ltd
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Abstract

To make an electric circuit hardly broken even if there is connection failure between substrates in an electronic apparatus.SOLUTION: An electronic apparatus 100 includes: a connection source substrate 1; a destination substrate 2; and a connection unit 3 connecting the connection source substrate 1 and the destination substrate 2. The connection source substrate 1 includes: a power source unit 11 for supplying power to the destination substrate 2 via the connection unit 3; a communication unit 13 for transmitting an electric signal to the destination substrate 2 via the connection unit 3; and a signal control unit 14 for stopping transmission of the electric signal from the communication unit 13 to the destination substrate 2 when a current value of power exceeds a predetermined range.SELECTED DRAWING: Figure 1

Description

本発明は、電気回路が搭載された基板を有する電子機器に関する。 The present invention relates to an electronic device having a substrate on which an electric circuit is mounted.

複数のプリント基板を備える電子機器では、プリント基板同士を接続するケーブルの接続不良により所定の電力が供給されず、プリント基板上の電気回路を破壊する場合がある。特許文献１では、プリント基板のそれぞれで短絡しているかの検査を行うことにより、ケーブルの接続不良を検知できる検査装置が開示されている。 In an electronic device including a plurality of printed circuit boards, a predetermined power may not be supplied due to a poor connection of cables connecting the printed circuit boards, and the electric circuit on the printed circuit boards may be destroyed. Patent Document 1 discloses an inspection device capable of detecting a cable connection failure by inspecting each of the printed circuit boards for a short circuit.

特開２０１０−２１２１３３号公報Japanese Unexamined Patent Publication No. 2010-212133

特許文献１に記載された検査装置においては、基板間の信号伝送を行うための信号線と、短絡を確認するための検査回路とを、プリント基板のそれぞれが必要とする。したがって、基板間の信号線に空きがない場合や、検査回路を有しないプリント基板を使用する場合は、ケーブルの接続不良等に伴うプリント基板間の接続不良を検知できず、電気回路が破壊されてしまう場合があるという問題が生じていた。 In the inspection apparatus described in Patent Document 1, each of the printed circuit boards requires a signal line for transmitting a signal between the substrates and an inspection circuit for confirming a short circuit. Therefore, if there is no space in the signal line between the boards, or if a printed circuit board that does not have an inspection circuit is used, a poor connection between the printed circuit boards due to a poor cable connection cannot be detected, and the electric circuit is destroyed. There was a problem that it might end up.

そこで、本発明はこれらの点に鑑みてなされたものであり、電子機器における基板間の接続不良により電気回路が破壊されづらくすることを目的とする。 Therefore, the present invention has been made in view of these points, and an object of the present invention is to make it difficult for an electric circuit to be destroyed due to a poor connection between substrates in an electronic device.

本発明の態様に係る電子機器は、第１基板と、第２基板と、前記第１基板と前記第２基板とを接続する接続部と、を有する。前記第１基板は、前記接続部を介して前記第２基板に電力を供給する電源部と、前記接続部を介して前記第２基板に電気信号を送信する通信部と、前記電力の電流値が所定の範囲を超えた場合に、前記通信部から前記第２基板への前記電気信号の送信を停止させる信号制御部と、を有する。 The electronic device according to the aspect of the present invention has a first substrate, a second substrate, and a connecting portion for connecting the first substrate and the second substrate. The first substrate includes a power supply unit that supplies electric power to the second substrate via the connection portion, a communication unit that transmits an electric signal to the second substrate via the connection portion, and a current value of the electric power. It has a signal control unit that stops the transmission of the electric signal from the communication unit to the second substrate when the power exceeds a predetermined range.

前記信号制御部は、前記電流値が所定の閾値以下であるか否かを判定する判定部と、前記通信部と前記第２基板との間の伝送路に設けられており、前記電気信号を送信するバッファと、を有してもよい。 The signal control unit is provided in a determination unit for determining whether or not the current value is equal to or less than a predetermined threshold value, and a transmission line between the communication unit and the second substrate, and transmits the electric signal. It may have a buffer to transmit.

前記判定部は、前記電流値が前記閾値以下であると判定した場合に、前記バッファをハイインピーダンス状態にしてもよい。 When the determination unit determines that the current value is equal to or less than the threshold value, the buffer may be brought into a high impedance state.

前記第１基板に設けられており、前記電流値を検出する電流検出部をさらに有し、前記判定部は、前記電流値が所定の閾値以下であるか否かを判定してもよい。 The first substrate may further include a current detection unit for detecting the current value, and the determination unit may determine whether or not the current value is equal to or less than a predetermined threshold value.

本発明によれば、電子機器における基板間の接続不良により電気回路が破壊されづらくするという効果を奏する。 According to the present invention, there is an effect that an electric circuit is hard to be destroyed due to a poor connection between substrates in an electronic device.

電子機器１００の構成を示す図である。It is a figure which shows the structure of the electronic device 100. 接続部３が正常に接続されていない状態を示す図である。It is a figure which shows the state which the connection part 3 is not connected normally.

［電子機器１００の構成］
図１は、本実施形態の電子機器１００の構成を示す図である。電子機器１００は、第１基板として機能する接続元基板１と、第２基板として機能する相手先基板２と、接続元基板１と相手先基板２とを接続する接続部３とを備える。接続元基板１は、電源部１１と、電流検出部１２と、通信部１３と、信号制御部１４とを備える。相手先基板２は、電源部２１と、通信部２２とを備える。接続部３は、コネクタ３ａと、コネクタ３ｂと、ケーブル３ｃとを備える。 [Configuration of electronic device 100]
FIG. 1 is a diagram showing a configuration of an electronic device 100 of the present embodiment. The electronic device 100 includes a connection source substrate 1 that functions as a first substrate, a counterparty substrate 2 that functions as a second substrate, and a connection portion 3 that connects the connection source substrate 1 and the counterparty substrate 2. The connection source board 1 includes a power supply unit 11, a current detection unit 12, a communication unit 13, and a signal control unit 14. The destination board 2 includes a power supply unit 21 and a communication unit 22. The connection portion 3 includes a connector 3a, a connector 3b, and a cable 3c.

電源部１１は、接続部３を介して相手先基板２に電力を供給する電源部として機能し、例えば外部から供給される電力に基づいて電源部２１に電力を供給する。電源部１１は、接続部３が備える伝送路であるケーブル３ｃを介して、電源部２１に電力を供給する。 The power supply unit 11 functions as a power supply unit that supplies electric power to the destination board 2 via the connection unit 3, and supplies electric power to the power supply unit 21 based on, for example, electric power supplied from the outside. The power supply unit 11 supplies electric power to the power supply unit 21 via a cable 3c which is a transmission line included in the connection unit 3.

電流検出部１２は、例えば電流センサーを備え、電源部１１が電源部２１に供給する電力の電流値を検出する。電流検出部１２は、電源部１１が電源部２１に供給する電力の電流値を信号制御部１４に送信する。 The current detection unit 12 includes, for example, a current sensor, and detects the current value of the electric power supplied by the power supply unit 11 to the power supply unit 21. The current detection unit 12 transmits the current value of the electric power supplied by the power supply unit 11 to the power supply unit 21 to the signal control unit 14.

通信部１３は、接続部３を介して相手先基板２に電気信号を送信する。通信部１３は、例えばＦＰＧＡ（Field Programmable Gate Array）又はＡＳＩＣ（Application Specific Integrated Circuit）等のロジック回路により構成されている。通信部１３は、信号制御部１４、及び接続部３が備える信号線を介して、通信部２２に電気信号を送信する。 The communication unit 13 transmits an electric signal to the destination board 2 via the connection unit 3. The communication unit 13 is composed of a logic circuit such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). The communication unit 13 transmits an electric signal to the communication unit 22 via the signal lines included in the signal control unit 14 and the connection unit 3.

信号制御部１４は、電源部１１が供給する電力の電流値が所定の範囲を超えた場合に、通信部１３から相手先基板２への電気信号の送信を停止させる。信号制御部１４は、バッファ１４１と判定部１４２とを備える。バッファ１４１は、通信部１３と相手先基板２との間の伝送路に設けられており、電気信号を送信するバッファとして機能し、例えばトライステートバッファである。 The signal control unit 14 stops the transmission of the electric signal from the communication unit 13 to the destination board 2 when the current value of the electric power supplied by the power supply unit 11 exceeds a predetermined range. The signal control unit 14 includes a buffer 141 and a determination unit 142. The buffer 141 is provided in the transmission line between the communication unit 13 and the destination board 2, functions as a buffer for transmitting an electric signal, and is, for example, a tri-state buffer.

判定部１４２は、電流値が所定の閾値以下であるか否かを判定する。判定部１４２は、判定した結果に基づいて、バッファ１４１の状態を変更する。判定部１４２は、電流検出部１２から取得した電流値が所定の閾値よりも大きい場合に、通信部１３から通信部２２に電気信号を送信できるようにバッファ１４１を導通状態にする。 The determination unit 142 determines whether or not the current value is equal to or less than a predetermined threshold value. The determination unit 142 changes the state of the buffer 141 based on the determination result. The determination unit 142 puts the buffer 141 in a conductive state so that an electric signal can be transmitted from the communication unit 13 to the communication unit 22 when the current value acquired from the current detection unit 12 is larger than a predetermined threshold value.

所定の閾値は、接続部３が接続元基板１と相手先基板２とを正常に接続している状態で流れる電流の最小値に基づいて定められている。所定の閾値は、例えば、電子機器１００が所定の動作をしている間に、接続部３が接続元基板１と相手先基板２とを正常に接続している状態で流れる電流の最小値である。所定の閾値は、電流の最小値にマージンを加算した値であってもよい。 The predetermined threshold value is determined based on the minimum value of the current flowing in a state where the connecting portion 3 normally connects the connection source substrate 1 and the counterpart substrate 2. The predetermined threshold value is, for example, the minimum value of the current flowing in a state where the connection unit 3 normally connects the connection source board 1 and the destination board 2 while the electronic device 100 is performing a predetermined operation. be. The predetermined threshold value may be a value obtained by adding a margin to the minimum value of the current.

一方、判定部１４２は、電流検出部１２から検出した電流値が所定の閾値以下であると判定した場合には、バッファをハイインピーダンス状態にすることで、通信部１３から通信部２２への電気信号の送信を停止させる。判定部１４２がこのように動作することで、接続部３が正常に接続されていないことで所定の閾値以下の電流しか流れていない状態で、通信部２２に電気信号が入力されることを防げる。 On the other hand, when the determination unit 142 determines that the current value detected by the current detection unit 12 is equal to or less than a predetermined threshold value, the determination unit 142 sets the buffer in a high impedance state to supply electricity from the communication unit 13 to the communication unit 22. Stop the signal transmission. By operating the determination unit 142 in this way, it is possible to prevent an electric signal from being input to the communication unit 22 in a state where the connection unit 3 is not normally connected and only a current equal to or less than a predetermined threshold value is flowing. ..

電源部２１は、接続部３を介して、接続元基板１から電力を受ける。電源部２１は、例えばＤＣ／ＤＣコンバータであり、接続元基板１から供給された電力に基づいて所定の電圧を発生し、発生した電圧を通信部２２に供給する。 The power supply unit 21 receives electric power from the connection source board 1 via the connection unit 3. The power supply unit 21 is, for example, a DC / DC converter, generates a predetermined voltage based on the electric power supplied from the connection source board 1, and supplies the generated voltage to the communication unit 22.

通信部２２は、電源部２１から所定の電圧が入力されている間に動作する。具体的には、通信部２２は、接続元基板１から電気信号を受信する。 The communication unit 22 operates while a predetermined voltage is input from the power supply unit 21. Specifically, the communication unit 22 receives an electric signal from the connection source board 1.

コネクタ３ａは、接続元基板１とケーブル３ｃとを接続する接続端子であり、接続元基板１に実装されている。コネクタ３ｂは、相手先基板２とケーブル３ｃとを接続する接続端子であり、相手先基板２に実装されている。ケーブル３ｃは、コネクタ３ａとコネクタ３ｂとを接続する電気ケーブルであり、例えばフレキシブルケーブルであってもよい。 The connector 3a is a connection terminal for connecting the connection source board 1 and the cable 3c, and is mounted on the connection source board 1. The connector 3b is a connection terminal for connecting the mating board 2 and the cable 3c, and is mounted on the mating board 2. The cable 3c is an electric cable that connects the connector 3a and the connector 3b, and may be, for example, a flexible cable.

［電子機器１００の動作］
図１は、接続元基板１と相手先基板２と接続部３とが正常に接続されている状態を示している。この場合、電源部１１から電源部２１に向けて、所定の閾値よりも大きな電流が流れる。したがって、判定部１４２は、電流検出部１２が検出した電流値が所定の閾値よりも大きいと判定し、バッファ１４１を、通信部１３から通信部２２に電気信号を送信できる状態にする（図１における判定部１４２からバッファ１４１への破線矢印）。この場合、通信部２２は、通信部１３が伝送した電気信号を受信することができる。 [Operation of electronic device 100]
FIG. 1 shows a state in which the connection source board 1, the partner board 2, and the connection portion 3 are normally connected. In this case, a current larger than a predetermined threshold value flows from the power supply unit 11 to the power supply unit 21. Therefore, the determination unit 142 determines that the current value detected by the current detection unit 12 is larger than a predetermined threshold value, and brings the buffer 141 into a state in which an electric signal can be transmitted from the communication unit 13 to the communication unit 22 (FIG. 1). (Dashed arrow arrow from the determination unit 142 to the buffer 141). In this case, the communication unit 22 can receive the electric signal transmitted by the communication unit 13.

図２は、接続元基板１と相手先基板２とを接続する接続部３が正常に接続されていない状態を示す図である。図２は、コネクタ３ｂとケーブル３ｃとの接続不良により、接続元基板１から電源部２１に電力が供給されない場合を示している（図２における×印）。 FIG. 2 is a diagram showing a state in which the connection portion 3 connecting the connection source board 1 and the destination board 2 is not normally connected. FIG. 2 shows a case where power is not supplied from the connection source board 1 to the power supply unit 21 due to a poor connection between the connector 3b and the cable 3c (x mark in FIG. 2).

図２の状態において、電流検出部１２は所定の閾値以下の電流値を検出する。したがって、判定部１４２は、接続元基板１から相手先基板２に流れる電流が所定の閾値以下であると判定し、バッファ１４１をハイインピーダンス状態にする（図２における判定部１４２からバッファ１４１への実線矢印）ことで、通信部１３から通信部２２への電気信号の送信を停止させる（図２におけるバッファ１４１と通信部２２との間の破線）。その結果、通信部２２は、電源部２１から電力が供給されていない状態で、通信部１３から電気信号を受信しない。 In the state of FIG. 2, the current detection unit 12 detects a current value equal to or less than a predetermined threshold value. Therefore, the determination unit 142 determines that the current flowing from the connection source substrate 1 to the destination substrate 2 is equal to or less than a predetermined threshold value, and puts the buffer 141 in a high impedance state (from the determination unit 142 in FIG. 2 to the buffer 141). (Solid arrow) stops the transmission of the electric signal from the communication unit 13 to the communication unit 22 (broken line between the buffer 141 and the communication unit 22 in FIG. 2). As a result, the communication unit 22 does not receive an electric signal from the communication unit 13 in a state where power is not supplied from the power supply unit 21.

［本発明の実施形態の効果］
このように、通信部２２は、接続部３の接続が正常であれば、電源部２１から電力が供給されている状態で、通信部１３からの電気信号を受信することができる。一方、通信部２２は、接続部３の接続が正常でなく、電源部２１から電力の供給を受けられない場合に、通信部１３からの電気信号を受信しない。したがって、通信部２２は、電力が供給されない状態における電気信号の受信を回避できる。その結果、電子機器１００は、接続元基板１と相手先基板２との接続が正常でない場合であっても、通信部２２が有する電気回路を破壊されづらくすることができる。 [Effects of Embodiments of the present invention]
As described above, if the connection of the connection unit 3 is normal, the communication unit 22 can receive the electric signal from the communication unit 13 while the power is being supplied from the power supply unit 21. On the other hand, the communication unit 22 does not receive the electric signal from the communication unit 13 when the connection of the connection unit 3 is not normal and the power supply cannot be received from the power supply unit 21. Therefore, the communication unit 22 can avoid receiving the electric signal in the state where the electric power is not supplied. As a result, the electronic device 100 can make it difficult for the electric circuit of the communication unit 22 to be destroyed even when the connection between the connection source board 1 and the destination board 2 is not normal.

以上、本発明を実施の形態を用いて説明したが、本発明の技術的範囲は上記実施の形態に記載の範囲には限定されず、その要旨の範囲内で種々の変形及び変更が可能である。例えば、装置の全部又は一部は、任意の単位で機能的又は物理的に分散・統合して構成することができる。また、複数の実施の形態の任意の組み合わせによって生じる新たな実施の形態も、本発明の実施の形態に含まれる。組み合わせによって生じる新たな実施の形態の効果は、もとの実施の形態の効果を併せ持つ。 Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes can be made within the scope of the gist thereof. be. For example, all or a part of the device can be functionally or physically distributed / integrated in any unit. Also included in the embodiments of the present invention are new embodiments resulting from any combination of the plurality of embodiments. The effect of the new embodiment produced by the combination also has the effect of the original embodiment.

１ 接続元基板
２ 相手先基板
３ 接続部
１１ 電源部
１２ 電流検出部
１３ 通信部
１４ 信号制御部
１４１ バッファ
１４２ 判定部
２１ 電源部
２２ 通信部 1 Connection source board 2 Destination board 3 Connection unit 11 Power supply unit 12 Current detection unit 13 Communication unit 14 Signal control unit 141 Buffer 142 Judgment unit 21 Power supply unit 22 Communication unit

Claims (3)

第１基板と、第２基板と、前記第１基板と前記第２基板とを接続する接続部と、を備え、
前記第１基板は、
前記接続部を介して前記第２基板に電力を供給する電源部と、
前記接続部を介して前記第２基板に電気信号を送信する通信部と、
前記電力の電流値が所定の範囲を超えた場合に、前記通信部から前記第２基板への前記電気信号の送信を停止させる信号制御部と、
を有する、電子機器。 A first substrate, a second substrate, and a connecting portion for connecting the first substrate and the second substrate are provided.
The first substrate is
A power supply unit that supplies electric power to the second substrate via the connection unit,
A communication unit that transmits an electric signal to the second substrate via the connection unit, and a communication unit.
A signal control unit that stops transmission of the electric signal from the communication unit to the second substrate when the current value of the electric power exceeds a predetermined range.
Have an electronic device. 前記信号制御部は、
前記電流値が所定の閾値以下であるか否かを判定する判定部と、
前記通信部と前記第２基板との間の伝送路に設けられており、前記電気信号を送信するバッファと、
を有し、
前記判定部は、前記電流値が前記閾値以下であると判定した場合に、前記バッファをハイインピーダンス状態にする、請求項１に記載の電子機器。 The signal control unit
A determination unit that determines whether or not the current value is equal to or less than a predetermined threshold value,
A buffer provided in a transmission line between the communication unit and the second substrate and for transmitting the electric signal,
Have,
The electronic device according to claim 1, wherein the determination unit puts the buffer in a high impedance state when it determines that the current value is equal to or less than the threshold value. 前記第１基板に設けられており、前記電流値を検出する電流検出部をさらに有し、
前記判定部は、前記電流値が所定の閾値以下であるか否かを判定する、
請求項２に記載の電子機器。 It is provided on the first substrate and further has a current detection unit for detecting the current value.
The determination unit determines whether or not the current value is equal to or less than a predetermined threshold value.
The electronic device according to claim 2.
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