JP5271092B2 - Electrical equipment - Google Patents

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JP5271092B2
JP5271092B2 JP2009003496A JP2009003496A JP5271092B2 JP 5271092 B2 JP5271092 B2 JP 5271092B2 JP 2009003496 A JP2009003496 A JP 2009003496A JP 2009003496 A JP2009003496 A JP 2009003496A JP 5271092 B2 JP5271092 B2 JP 5271092B2
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light
lever
signal
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light emission
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JP2010160734A (en
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基浩 杉本
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NEC Computertechno Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric apparatus allowing improvement of reliability by certainly removing influence of external light even when using an optical switch. <P>SOLUTION: The electric apparatus includes: a lever 14 for inserting/extracting a device unit 10 to/from a casing; a light emission part 12 for emitting light of a pulse-like light emission signal; and a light reception part 13 for receiving the light of the light emission signal from the light emission part. The lever 14 has a light shielding part 15 for shielding light between the light emission part and the light reception part in a close state, and is evacuated from between the light emission part and the light reception part in an open state. The light emission signal from the light emission part 12 and a light reception signal of the light reception part 13 are compared, and it is decided that the lever 14 is opened when the light reception signal is the same signal as the light reception signal. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、情報処理装置等の電気機器、特に、筐体等に挿抜する構造の電気機器に関するものである。   The present invention relates to an electrical apparatus such as an information processing apparatus, and more particularly to an electrical apparatus having a structure that is inserted into and removed from a housing or the like.

図５は従来例の機械式スイッチを用いて装置の挿抜を検出する構造を示す。図中５０は情報処理装置等の装置ユニットである。装置ユニット５０の隅部にはレバー５２が固定されている。レバー５２を図面右方向に引き出すことにより装置ユニット５０を筐体から取り出し、レバー５２を図面左方向に押し込むことで装置ユニット５０を筐体に挿入する構造である。   FIG. 5 shows a structure for detecting insertion / removal of an apparatus using a conventional mechanical switch. In the figure, reference numeral 50 denotes an apparatus unit such as an information processing apparatus. A lever 52 is fixed to the corner of the device unit 50. The device unit 50 is removed from the housing by pulling out the lever 52 in the right direction in the drawing, and the device unit 50 is inserted into the housing by pushing the lever 52 in the left direction in the drawing.

また、図５に示すように装置ユニット５０が筐体に挿入された状態では、レバー５２の先端部が機械式スイッチ５１を押しているため、機械式スイッチ５１はオン状態となる。一方、レバー５２を図面右方向に引き出して装置ユニット５０を筐体から取り出すと、機械式スイッチ５１はレバー５２の先端部により押されないため、機械式スイッチ５１はオフ状態となる。このように機械式スイッチのオン／オフの開閉信号５３により装置ユニット５０の挿抜が分かる。   Further, as shown in FIG. 5, in the state where the device unit 50 is inserted into the housing, the tip of the lever 52 pushes the mechanical switch 51, so that the mechanical switch 51 is turned on. On the other hand, when the lever 52 is pulled out to the right in the drawing and the device unit 50 is taken out of the casing, the mechanical switch 51 is not pushed by the tip of the lever 52, so the mechanical switch 51 is turned off. In this way, the insertion / extraction of the device unit 50 can be recognized by the on / off switching signal 53 of the mechanical switch.

また、特開平０７−１３５３９５号公報に記載されているように、機械式スイッチではなく、光式スイッチを用いて装置ユニットの装置フレームからの移動を検出するものがある（特許文献１）。特許文献１のものは、ラッチレバーアームがラッチ位置にある場合には、ラッチリブにより光放出器と光検出器の間が遮られ、光検出器は光放出器からの光を検出しない。一方、ラッチレバーアームを操作して装置ユニットを装置フレームから移動させる場合には、ラッチレバーアームのラッチリブが光放出器と光検出器の間から外れ、光検出器は光放出器からの光を検出する。   In addition, as described in Japanese Patent Application Laid-Open No. 07-135395, there is an apparatus that detects movement of an apparatus unit from an apparatus frame using an optical switch instead of a mechanical switch (Patent Document 1). In Patent Document 1, when the latch lever arm is in the latch position, the light emitting device and the light detector are blocked by the latch rib, and the light detector does not detect light from the light emitter. On the other hand, when the device unit is moved from the device frame by operating the latch lever arm, the latch rib of the latch lever arm comes off between the light emitter and the light detector, and the light detector emits light from the light emitter. To detect.

特開平０７−１３５３９５号公報Japanese Patent Application Laid-Open No. 07-135395

図５の機械式スイッチを使用する場合には、レバー５２で直接機械式スイッチ５１を押す構造であるため、スイッチの構造を小さくすると部品自体が小さくなるため、スイッチのストローク長が短くなり、構造的に十分なストローク長を確保することが難しく、誤ってオープンとなりやすい。   When the mechanical switch shown in FIG. 5 is used, the mechanical switch 51 is directly pressed by the lever 52. Therefore, if the switch structure is reduced, the parts themselves are reduced, so that the switch stroke length is shortened. It is difficult to secure a sufficient stroke length, and it tends to open accidentally.

また、特許文献１に記載の光式スイッチを用いた場合には、室内の光や太陽光等の外部光の影響を受ける可能性があるため、レバーのオープン／クローズを誤検出する恐れがある。即ち、光式スイッチを用いた場合には、スイッチ自体が装置ユニットの表面に近くにあることや、レバーを通過させるための空間が必要となるため、完全に外部の光を遮断することは難しい。そのため、外部から強力な光を受けた場合には、誤ってレバーがオープンと反応してしまう場合があった。   In addition, when the optical switch described in Patent Document 1 is used, there is a possibility that the open / close of the lever may be erroneously detected because there is a possibility of being influenced by indoor light or external light such as sunlight. . In other words, when an optical switch is used, it is difficult to completely block external light because the switch itself is close to the surface of the device unit and a space for passing the lever is required. . For this reason, when a strong light is received from the outside, the lever may accidentally react to open.

本発明の目的は、光式スイッチを用いた場合でも外部光の影響を確実に除去し、信頼性を向上させることが可能な電気機器を提供することにある。   An object of the present invention is to provide an electrical device that can reliably remove the influence of external light and improve reliability even when an optical switch is used.

本発明は、装置ユニットを筐体に挿抜するためのレバーと、光信号を発光する発光部と、前記発光部からの光信号を受光する受光部とを有し、前記レバーは、当該レバーがクローズの状態では前記発光部と受光部との間を遮光し、前記レバーがオープンの状態では前記発光部と受光部との間から退避する光遮断部を有しており、前記発光部が発光した発光信号と前記受光部で受光した受光信号とを比較し、その比較結果に基づいて前記レバーのオープン／クローズを判定する制御部を有し、前記制御部は、前記受光信号が前記発光信号と同一の発光時間の信号であるかを判定し、同一の発光時間の信号である場合に、前記レバーがオープンされたと判定することを特徴とする。 The present invention includes a lever for inserting / removing the device unit into / from the housing, a light emitting unit that emits an optical signal, and a light receiving unit that receives an optical signal from the light emitting unit. In the closed state, the light-emitting unit and the light-receiving unit are shielded from light, and when the lever is open, the light-blocking unit is retracted from the light-emitting unit and the light-receiving unit. and comparing the received light signal received by the light-emitting signal to the light receiving portion, have a determining controller to open / close of the lever on the basis of the comparison result, the control unit, the photodetection signal is the emission signal It is determined whether the signal is the same light emission time signal, and if the signal is the same light emission time signal, it is determined that the lever is opened .

また、本発明は、装置ユニットを筐体に挿抜するためのレバーと、パルス状の発光信号を発光する発光部と、前記発光部からの発光信号を受光する受光部とを有し、前記レバーは、当該レバーがクローズの状態では前記発光部と受光部との間を遮光し、前記レバーがオープンの状態では前記発光部と受光部との間から退避する光遮断部を有しており、前記発光部が発光した発光信号と前記受光部で受光した受光信号との比較結果に基づいて前記レバーのオープン／クローズを判定する制御部を有し、前記制御部は、前記受光信号が前記発光信号と同一の場合に前記レバーがオープンされたと判定し、前記制御部は、前記受光信号が前記発光信号と同一の発光時間の信号であるかを判定し、同一の発光時間の信号である場合に、前記レバーがオープンされたと判定することを特徴とする。 The present invention further includes a lever for inserting and removing the device unit into and from the housing, a light emitting unit that emits a pulsed light emission signal, and a light receiving unit that receives the light emission signal from the light emitting unit. Has a light blocking part that shields light between the light emitting part and the light receiving part when the lever is closed, and retracts from between the light emitting part and the light receiving part when the lever is open, A control unit that determines whether the lever is open or closed based on a comparison result between a light emission signal emitted from the light emitting unit and a light reception signal received by the light receiving unit; When it is the same as the signal, it is determined that the lever is opened, and the control unit determines whether the light reception signal is a signal having the same light emission time as the light emission signal, and is a signal having the same light emission time. And the lever is And judging that the Pung.

本発明によれば、発光部の光をパルス化し、受光部で検出した受光信号と発光信号を比較することにより、外部光等の影響を除去でき、誤ってレバーのオープン検出をすることがなくなり、信頼性を向上できる。また、光式スイッチはレバーのストローク長の調整が容易なため、構造上、装置の小型化を比較的簡単に実現できる。更に、スイッチとレバーが接触しない非接触式のレバーであるため、部品の破損等の危険性も減らすことができ、より信頼性を向上できる。   According to the present invention, the light of the light emitting unit is pulsed, and the light reception signal detected by the light receiving unit is compared with the light emission signal, so that the influence of external light and the like can be removed, and the open detection of the lever is not erroneously detected. , Can improve the reliability. In addition, since the optical switch can easily adjust the stroke length of the lever, the size of the apparatus can be relatively easily reduced due to the structure. Furthermore, since the switch and the lever are non-contact type levers, the risk of component damage and the like can be reduced, and the reliability can be further improved.

本発明に係る電気機器の一実施形態を示す概念図である。It is a conceptual diagram which shows one Embodiment of the electric equipment which concerns on this invention. 本発明に係る制御部と発光部及び受光部間の信号或いは制御部から出力する信号を示す図である。It is a figure which shows the signal which outputs between the signal between a control part which concerns on this invention, a light emission part, and a light-receiving part, or a control part. 図２の各部の信号を示す図である。It is a figure which shows the signal of each part of FIG. 本発明のレバーのオープン／クローズを判定する方法を説明するフローチャートである。It is a flowchart explaining the method of determining open / close of the lever of this invention. 従来例の機械式スイッチを用いて装置の挿抜を検出する方法を説明する図である。It is a figure explaining the method to detect insertion / extraction of an apparatus using the mechanical switch of a prior art example.

次に、発明を実施するための形態について図面を参照して詳細に説明する。   Next, embodiments for carrying out the invention will be described in detail with reference to the drawings.

まず、本発明をなすに至った背景を説明する。機械式スイッチの構造では部品自体が小さいため構造的に非常にシビアな設計をしなければならない。そのため、本願発明者は設計値として十分にマージンがあるものを設計する過程で光デバイスを使用したスイッチ構造を使用することを検討していた。   First, the background that led to the present invention will be described. In the structure of the mechanical switch, since the parts themselves are small, the structure must be designed very severely. For this reason, the inventor of the present application has considered using a switch structure using an optical device in the process of designing a design value having a sufficient margin.

この検討の過程で、光の誤検出に対する問題が発生し、誤検出を防止するために光のパルス化を行い、パルスの一致を確認することによりレバーがオープンされたと検出する方式を発明するに至った。その際、誤ってレバーがオープンされた状態となってしまうと、例えば、装置の仕様上、電源遮断となるため、本発明を情報処理装置に適用した場合にはコンピュータの運用上問題となる。そこで、光式スイッチを用いた場合でも、誤検出のない、より信頼性の高い光スイッチを用いた情報処理装置等の電気機器を発明するに至ったのである。   In the course of this study, there was a problem with light misdetection, and in order to invent a method of detecting that the lever was opened by pulsing light to prevent false detection and confirming the coincidence of pulses It came. At this time, if the lever is accidentally opened, for example, the power supply is shut down due to the specifications of the apparatus. Therefore, when the present invention is applied to the information processing apparatus, there is a problem in the operation of the computer. Therefore, even when an optical switch is used, an electrical apparatus such as an information processing apparatus using a more reliable optical switch without erroneous detection has been invented.

図１は本発明に係る電気機器の一実施形態を示す概念図である。本実施形態では電気機器として情報処理装置を例に挙げて説明する。図中１０は情報処理装置等の装置ユニットである。装置ユニット１０は図示しない筐体に挿抜可能な構造となっており、装置ユニット１０の筐体に対する挿抜を発光部１２と受光部１３を用いた光スイッチで検出する。   FIG. 1 is a conceptual diagram showing an embodiment of an electric apparatus according to the present invention. In the present embodiment, an information processing apparatus will be described as an example of an electric device. In the figure, reference numeral 10 denotes an apparatus unit such as an information processing apparatus. The device unit 10 has a structure that can be inserted into and removed from a housing (not shown).

レバー１４は装置ユニット１０を筐体から挿抜するために設けられ、装置ユニット１０の隅部に固定されている。レバー１４を図面右方向に引き出すことにより装置ユニット１０を筐体から取り出し、レバー１４を図面左方向に押し込むことで装置ユニット１０を筐体に挿入する構造である。レバー１４の中途には発光部１２と受光部１３との間を遮光する光遮断部１５が設けられている。   The lever 14 is provided to insert and remove the device unit 10 from the housing, and is fixed to the corner of the device unit 10. The device unit 10 is removed from the housing by pulling out the lever 14 in the right direction in the drawing, and the device unit 10 is inserted into the housing by pushing the lever 14 in the left direction in the drawing. In the middle of the lever 14, a light blocking unit 15 that shields light between the light emitting unit 12 and the light receiving unit 13 is provided.

レバー１４が図１に示す位置（レバークローズ状態）、即ち、装置ユニット１０が筐体に装着され、レバー１４の光遮光部１５が発光ｌ部１２と受光部１３との間に位置している場合には、発光部１２からの光信号は光遮断部１５で遮光されるため、受光部１３は発光部１２からの光信号を受光しない。また、レバー１４を図面右方向に引き出すと（レバーオープン）、光遮断部１５は発光部１２からの光信号を遮光しないため、受光部１３は発光部１２からの光信号を受光する。   The lever 14 is in the position shown in FIG. 1 (lever closed state), that is, the device unit 10 is mounted on the housing, and the light shielding portion 15 of the lever 14 is located between the light emitting portion 12 and the light receiving portion 13. In this case, since the optical signal from the light emitting unit 12 is blocked by the light blocking unit 15, the light receiving unit 13 does not receive the optical signal from the light emitting unit 12. When the lever 14 is pulled out to the right in the drawing (lever open), the light blocking unit 15 does not block the optical signal from the light emitting unit 12, so the light receiving unit 13 receives the optical signal from the light emitting unit 12.

受光部１３からの受光信号は制御部１１に送られ、詳しく後述するように制御部１１は発光部１２からの発光信号と受光部１３の受光信号を比較し、その比較結果に基づいてレバー１４のクローズ／オープンを判定し、レバー開閉信号を出力する。本実施形態では、制御部１１のレバー開閉信号によりレバーオープンと判定された場合には装置ユニット１０の電源をオフし、レバークローズと判定された場合には装置ユニット１０の電源をオンする制御を行う。   The light reception signal from the light receiving unit 13 is sent to the control unit 11, and the control unit 11 compares the light emission signal from the light emitting unit 12 and the light reception signal of the light receiving unit 13 as will be described in detail later, and based on the comparison result, the lever 14 Is closed / open, and a lever open / close signal is output. In the present embodiment, when the lever opening / closing signal of the control unit 11 determines that the lever is open, the apparatus unit 10 is turned off, and when it is determined that the lever is closed, the apparatus unit 10 is turned on. Do.

発光部１２としては、例えば、発光ダイオード等の光を発光する素子であれば何を用いても構わない。また、受光部１３としては、例えば、フォトセンサ等の光を検出する素子であれば何を用いても構わない。赤外線を用いても良い。   As the light emitting unit 12, for example, any element that emits light such as a light emitting diode may be used. In addition, as the light receiving unit 13, for example, any element that detects light, such as a photosensor, may be used. Infrared rays may be used.

図２は本発明に係る光スイッチ回路を示す。図中１２は光を発光する発光部、１３は発光部１２からの発光信号を受光する受光部である。制御部１１は発光部１２を制御すると共に、後述するように発光部１２の発光信号と受光部１３の受光信号に基づいてレバー１４のクローズ／オープンを判定する。また、図３は図２の各部の信号波形を示す。制御部１１は発光部１２に対して発光制御信号１７を送信する。この制御信号（駆動信号）１７は発光部１２をパルス発光させるものであり、発光部１２は発光制御信号１７に応じてパルス発光する。   FIG. 2 shows an optical switch circuit according to the present invention. In the figure, reference numeral 12 denotes a light emitting unit that emits light, and 13 denotes a light receiving unit that receives a light emission signal from the light emitting unit 12. The control unit 11 controls the light emitting unit 12 and determines the closing / opening of the lever 14 based on the light emission signal of the light emitting unit 12 and the light reception signal of the light receiving unit 13 as described later. FIG. 3 shows signal waveforms at various parts in FIG. The control unit 11 transmits a light emission control signal 17 to the light emitting unit 12. This control signal (drive signal) 17 is for causing the light emitting unit 12 to emit light in pulses, and the light emitting unit 12 emits pulses in response to the light emission control signal 17.

この発光信号１８は図３（ａ）に示すように一定周期のパルス信号である。図３の例では、発光信号１８はオン時間とオフ時間がそれぞれ一定のパルス信号である。受光部１３は発光部１２からの発光信号１８を受光し、図３（ｃ）に示すような受光信号１９を制御部１１に出力する。なお、図３は各部の信号を概念的に示すものである。そのため、図３（ａ）の発光信号１８に対して図３（ｃ）の受光信号１９は遅れて示しているが、実際には図３のように遅れることはない。   The light emission signal 18 is a pulse signal having a constant period as shown in FIG. In the example of FIG. 3, the light emission signal 18 is a pulse signal with a constant on time and off time. The light receiving unit 13 receives the light emission signal 18 from the light emitting unit 12, and outputs a light reception signal 19 as shown in FIG. 3C to the control unit 11. FIG. 3 conceptually shows the signals of the respective units. Therefore, although the light reception signal 19 in FIG. 3C is delayed with respect to the light emission signal 18 in FIG. 3A, it is not actually delayed as shown in FIG.

制御部１１は、詳しく後述するように自身が送出したパルス（発光信号１８）と受け取ったパルス（受光信号１９）とを比較し、受け取った受光信号が発光信号と同一の信号の場合には、レバー１４がオープンされたものと判断する。また、受光部１３でパルス信号を受信できなくなった場合には、レバー１４がクローズされたものと判断する。更に、受光部１３が同一の信号ではない信号を受信した場合には外部から不正な信号を検出したものとし、レバー１４のオープンと判定しない。   As will be described in detail later, the control unit 11 compares the pulse (light emission signal 18) transmitted by itself with the received pulse (light reception signal 19), and when the received light reception signal is the same signal as the light emission signal, It is determined that the lever 14 has been opened. If the light receiving unit 13 cannot receive the pulse signal, it is determined that the lever 14 is closed. Further, when the light receiving unit 13 receives signals that are not the same signal, it is assumed that an illegal signal is detected from the outside, and it is not determined that the lever 14 is open.

図３（ｄ）は制御部１１からのレバー１４のオープン／クローズを示すレバー開閉信号である。制御部１１におけるレバー１４のオープン／クローズの判定方法については詳しく後述する。   FIG. 3D is a lever opening / closing signal indicating opening / closing of the lever 14 from the control unit 11. A method for determining the opening / closing of the lever 14 in the control unit 11 will be described in detail later.

図３（ｂ）はレバー１４のオープンとクローズを示す。レバー１４がクローズの場合には、発光部１２からの発光信号１８がレバー１４の光遮蔽部１５で遮蔽されるため、図３（ｃ）に示すように受光部１３は発光信号を受光しない。また、レバー１４がオープンされると、レバー１４の光遮蔽部１５が発光部１２と受光部１３との間から退避するため、図３（ｃ）に示すように発光部１２からの発光信号１８が受光部１３で受光され、制御部１１に送られる。   FIG. 3B shows the opening and closing of the lever 14. When the lever 14 is closed, the light emission signal 18 from the light emitting unit 12 is shielded by the light shielding unit 15 of the lever 14, so that the light receiving unit 13 does not receive the light emission signal as shown in FIG. When the lever 14 is opened, the light shielding portion 15 of the lever 14 is retracted from between the light emitting portion 12 and the light receiving portion 13, so that the light emission signal 18 from the light emitting portion 12 as shown in FIG. Is received by the light receiving unit 13 and sent to the control unit 11.

図４は制御部１１のレバー１４のオープン／クローズの判定方法を説明するフローチャートである。制御部１１は受光部１３にて検出された信号を０／１の電気信号に変換した状態で入力する。また、制御部１１の制御により発光部１２からパルス状の発光信号が照射されており、制御部１１は受光部１３からの受光信号が出力されるかを監視している（Ｓ１０１）。   FIG. 4 is a flowchart illustrating a method for determining whether the control unit 11 is open / closed. The control unit 11 inputs the signal detected by the light receiving unit 13 in a state converted into a 0/1 electric signal. In addition, a pulsed light emission signal is emitted from the light emitting unit 12 under the control of the control unit 11, and the control unit 11 monitors whether a light reception signal from the light receiving unit 13 is output (S101).

レバー１４がクローズ状態からオープンされると、受光部１３は発光部１２からの発光信号１８を受光するようになり、受光信号を制御部１１に送信する。制御部１１は自身で送出した発光部１２からの発光信号１８と受光部１３で受光した受光信号１８とを比較し、パルスチェックを行う（Ｓ１０２）。   When the lever 14 is opened from the closed state, the light receiving unit 13 receives the light emission signal 18 from the light emitting unit 12 and transmits the light reception signal to the control unit 11. The control unit 11 compares the light emission signal 18 transmitted from the light emitting unit 12 with the light reception signal 18 received by the light receiving unit 13 and performs a pulse check (S102).

パルスチェックとしては、受光部１３の受光信号１９が制御部１１自身が発生させた発光部１２の発光信号１８とが同一の信号であるかを判定する。例えば、発光信号１８と受光信号１９の周期を計測し、受光部１３にて受光した受光信号１９が発光信号の周期と一致するかどうかの判定を行う。受光信号１９の周期が発光信号１８の周期と一致した場合には、受光信号が発光信号と同一の信号と判定する。   As a pulse check, it is determined whether the light reception signal 19 of the light receiving unit 13 is the same signal as the light emission signal 18 of the light emitting unit 12 generated by the control unit 11 itself. For example, the cycle of the light emission signal 18 and the light reception signal 19 is measured, and it is determined whether or not the light reception signal 19 received by the light receiving unit 13 matches the cycle of the light emission signal. When the period of the light reception signal 19 coincides with the period of the light emission signal 18, the light reception signal is determined to be the same signal as the light emission signal.

また、発光信号１８の発光時間（オン時間）と受光信号１９の発光時間（オン時間）を計測し、受光信号１９のオン時間が発光信号１８のオン時間と同一かどうかを判定しても良い。   Further, the light emission time (ON time) of the light emission signal 18 and the light emission time (ON time) of the light reception signal 19 may be measured to determine whether or not the light emission signal 19 ON time is the same as the light emission signal 18 ON time. .

一方、受光部１３からの信号を受け取っても、発光状態の信号（発光信号１８）を送出していない場合には、外部光のノイズを受け取ったものと判断し、レバー１４がオープンされたとは判定しない。   On the other hand, if the signal from the light receiving unit 13 is received but the light emission state signal (light emission signal 18) is not transmitted, it is determined that the external light noise has been received, and the lever 14 is opened. Do not judge.

次に、制御部１１はＳ１０２のパルスチェックで同一の信号と判定すると、パルス信号の一致のチェックを複数回連続して行う（Ｓ１０３）。即ち、受光信号１９が発光信号１８と一致するかの判定を複数回連続して行う。予め規定された規定回数連続し一致した時点でレバー１４がオープンしたと判定する（Ｓ１０４）。図３の例では、図３（ｄ）に示すように３回連続してパルス信号が一致した時点でレバー１４がオープンしたと判定している。パルスチェックの回数はこの限りではない。   Next, when the control unit 11 determines that the signals are the same in the pulse check of S102, the control unit 11 continuously checks the coincidence of the pulse signals a plurality of times (S103). That is, it is continuously determined a plurality of times whether the light reception signal 19 matches the light emission signal 18. It is determined that the lever 14 has been opened at the time when a predetermined number of times that have been defined in advance have been matched (S104). In the example of FIG. 3, as shown in FIG. 3D, it is determined that the lever 14 is opened when the pulse signals coincide with each other three times in succession. The number of pulse checks is not limited to this.

なお、１回のパルスチェックでレバー１４のオープンを判定しても良いが、規定回数連続して一致した時にレバー１４がオープンしたと判定することが外部光等の影響をより確実に除去できるため望ましい。   Although it is possible to determine whether the lever 14 is open by one pulse check, it is possible to more reliably remove the influence of external light or the like by determining that the lever 14 is opened when the numbers coincide with each other for a specified number of times. desirable.

制御部１１は、Ｓ１０４でレバー１４がオープンしたと判定すると、図３（ｄ）に示すようなレバー１４がオープンしたことを示すレバー開閉信号２０を装置ユニット１０内の図示しない制御回路に通知する。この制御回路は上述のように装置ユニット１０の電源をオフする制御を行う。また、レバー１４がクローズと判定した場合には装置ユニット１０の電源をオンする制御を行う。   When determining that the lever 14 is opened in S104, the control unit 11 notifies a control circuit (not shown) in the apparatus unit 10 of a lever opening / closing signal 20 indicating that the lever 14 is opened as shown in FIG. . This control circuit performs control to turn off the power of the device unit 10 as described above. Further, when it is determined that the lever 14 is closed, control is performed to turn on the power of the device unit 10.

一方、制御回路１１は規定回数以上一致を検出しない場合には（Ｓ１０５）、誤検出もしくはレバー１４が完全にオープンしていないものと判断し、最初のレバークローズの状態に戻る。また、複数回一致してレバー１４がオープンした状態から再びパルスを受け取らなくなった場合には、レバー１４がクローズしたものと判断し、レバー１４がクローズしたことを示すレバー開閉信号を出力する。   On the other hand, when the control circuit 11 does not detect the coincidence more than the specified number of times (S105), it is determined that the detection is incorrect or the lever 14 is not completely opened, and the control returns to the first lever closed state. Further, when the pulse is not received again from the state in which the lever 14 is opened after a plurality of coincidence, it is determined that the lever 14 is closed, and a lever opening / closing signal indicating that the lever 14 is closed is output.

以上のように本実施形態では、発光部の光をパルス化し、受光部で検出した受光信号と発光信号を比較し、その比較結果に基づいてレバー１４のオープン／クローズを判定する。特に、発光信号と受光信号とが複数回連続して一致した時にレバーオープンと判定することにより、外部光等の影響を除去でき、誤ってレバーのオープン検出をすることがなくなり、信頼性を向上できる。   As described above, in this embodiment, the light of the light emitting unit is pulsed, the light reception signal detected by the light receiving unit is compared with the light emission signal, and the open / close of the lever 14 is determined based on the comparison result. In particular, by determining that the lever is open when the light emission signal and the light reception signal are coincident multiple times in succession, it is possible to eliminate the influence of external light, etc., and prevent the detection of lever open by mistake, improving reliability. it can.

また、光式スイッチはレバーのストローク長の調整が容易なため、構造上、装置の小型化を比較的簡単に実現できる。更に、スイッチとレバーが接触しない非接触式のレバーであるため、部品の破損等の危険性も減らすことができ、より信頼性を向上させることが可能となる。   In addition, since the optical switch can easily adjust the stroke length of the lever, the size of the apparatus can be relatively easily reduced due to the structure. Furthermore, since the switch and the lever are non-contact type levers, the risk of component damage and the like can be reduced, and the reliability can be further improved.

なお、以上の実施形態では、情報処理装置を例に挙げて説明したが、本発明は、これに限ることなく、ネットワーク機器等の装置ユニットを筐体等に挿抜する全ての電気機器に使用することができる。   In the above embodiment, the information processing apparatus has been described as an example. However, the present invention is not limited to this, and the present invention is used for all electrical devices in which a device unit such as a network device is inserted into and removed from a housing or the like. be able to.

本発明は、筐体から挿抜する構造の装置ユニットにおいて、装置ユニットの挿抜を検出する手段として利用できる。装置ユニットとしては、例えば、情報処理装置等が挙げられる。この検出手段の検出結果に基づき、例えば、装置電源の遮断等の各種制御を行うことができる。また、本発明は、情報処理装置以外にも、例えば、ネットワーク機器等の装置ユニットを筐体から挿抜する構造の電気機器に使用できる。   INDUSTRIAL APPLICABILITY The present invention can be used as means for detecting insertion / removal of an apparatus unit in an apparatus unit having a structure for inserting / removing from a housing. An example of the device unit is an information processing device. Based on the detection result of the detection means, for example, various controls such as shutting off the apparatus power supply can be performed. In addition to the information processing apparatus, the present invention can be used for, for example, an electric apparatus having a structure in which an apparatus unit such as a network apparatus is inserted and removed from the housing.

１０ 装置ユニット
１１ 制御部
１２ 発光部
１３ 受光部
１４ レバー
１５ 光遮蔽部 DESCRIPTION OF SYMBOLS 10 Device unit 11 Control part 12 Light emission part 13 Light reception part 14 Lever 15 Light shielding part

Claims (5)

装置ユニットを筐体に挿抜するためのレバーと、光信号を発光する発光部と、前記発光部からの光信号を受光する受光部とを有し、
前記レバーは、当該レバーがクローズの状態では前記発光部と受光部との間を遮光し、前記レバーがオープンの状態では前記発光部と受光部との間から退避する光遮断部を有しており、
前記発光部が発光した発光信号と前記受光部で受光した受光信号とを比較し、その比較結果に基づいて前記レバーのオープン／クローズを判定する制御部を有し、
前記制御部は、前記受光信号が前記発光信号と同一の発光時間の信号であるかを判定し、同一の発光時間の信号である場合に、前記レバーがオープンされたと判定することを特徴とする電気機器。 A lever for inserting / removing the device unit into / from the housing, a light emitting unit for emitting an optical signal, and a light receiving unit for receiving an optical signal from the light emitting unit,
The lever includes a light blocking unit that shields light between the light emitting unit and the light receiving unit when the lever is closed and retracts from between the light emitting unit and the light receiving unit when the lever is open. And
The light emitting unit compares the light receiving signal received by the light receiving unit and the light emission signal emitted, have a control unit for determining an open / close of the lever on the basis of the comparison result,
The control unit determines whether the light reception signal is a signal having the same light emission time as the light emission signal, and determines that the lever is opened when the light reception signal is a signal having the same light emission time. Electrical equipment. 装置ユニットを筐体に挿抜するためのレバーと、パルス状の発光信号を発光する発光部と、前記発光部からの発光信号を受光する受光部とを有し、
前記レバーは、当該レバーがクローズの状態では前記発光部と受光部との間を遮光し、前記レバーがオープンの状態では前記発光部と受光部との間から退避する光遮断部を有しており、
前記発光部が発光した発光信号と前記受光部で受光した受光信号との比較結果に基づいて前記レバーのオープン／クローズを判定する制御部を有し、前記制御部は、前記受光信号が前記発光信号と同一の場合に前記レバーがオープンされたと判定し、
前記制御部は、前記受光信号が前記発光信号と同一の発光時間の信号であるかを判定し、同一の発光時間の信号である場合に、前記レバーがオープンされたと判定することを特徴とする電気機器。 A lever for inserting / removing the device unit into / from the housing; a light emitting unit for emitting a pulsed light emission signal;
The lever includes a light blocking unit that shields light between the light emitting unit and the light receiving unit when the lever is closed and retracts from between the light emitting unit and the light receiving unit when the lever is open. And
A control unit that determines whether the lever is open or closed based on a comparison result between a light emission signal emitted from the light emitting unit and a light reception signal received by the light receiving unit; When the signal is the same, it is determined that the lever is opened ,
The control unit determines whether the light reception signal is a signal having the same light emission time as the light emission signal, and determines that the lever is opened when the light reception signal is a signal having the same light emission time. Electrical equipment. 前記制御部は、前記受光信号が前記発光信号と同一の発光時間の信号であるかの判定を複数回連続して行い、規定回数連続して同一の発光時間の信号である場合に、前記レバーがオープンされたと判定することを特徴とする請求項１又は２に記載の電気機器。 When the control unit performs the light reception signal of the determination multiple times in a row is a signal of the emission signal and the same light emission time, a signal of a prescribed number of times consecutively same emission time, electrical device according to claim 1 or 2, wherein the lever and judging to have been opened. 前記制御部による前記レバーのオープン／クローズの判定結果に基づいて前記装置ユニットの電源のオン／オフを制御する手段を有し、前記レバーがオープンされたと判定した場合には、前記装置ユニットの電源をオフし、前記レバーがクローズされたと判定した場合には、前記電源をオンすることを特徴とする請求項１乃至３のいずれか１項に記載の電気機器。 The control unit has means for controlling on / off of the power supply of the device unit based on the determination result of the opening / closing of the lever. When it is determined that the lever is opened, the power supply of the device unit off and when it is determined that the lever is closed, the electrical device according to any one of claims 1 to 3, characterized in that turning on the power source. 前記電気機器は、情報処理装置或いはネットワーク機器であることを特徴とする請求項１乃至４のいずれか１項に記載の電気機器。 The electrical device according to any one of claims 1 to 4 , wherein the electrical device is an information processing apparatus or a network device.
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