200843698 九、發明說明： 【發明所屬之技術領域】 本發明係關於血壓測定裝置，尤其係關於將腕帶固定 於活體並進行血壓測定的血壓測定裝置。 【先前技術】 在測定血壓時，將係包含有血壓測定用流體袋之阻血 帶的腕帶捲繞於活體之一部分後並固定，再將流體袋進行 增減壓。藉由將活體之一部分所捲繞的腕帶壓進行增減壓 ，而以腕帶壓變動的振幅變化掌握被壓迫之血管的容積變 化，並算出血壓的手法稱爲示波器法。 在使用示波器法的電子血壓計，包含有：採用根據將 腕帶壓加壓之過程的腕帶壓變動之振幅變化算出血壓的方 式之電子血壓計；及採用根據加壓至設定腕帶壓爲止後減 壓之過程的腕帶壓變動之振幅變化算出血壓的方式之電子 血壓計。在採用後者之方式的電子血壓計，首先，加壓至 血壓計算所需之腕帶壓以上的設定腕帶壓爲止。因而’對 用以向流體袋內注入流體的泵所要求之輸出流量比採用前 者之方式的電子血壓計大，而需要大型的泵。又’在採用 後者之方式的電子血壓計之測定動作’包含有在開始測定 後加壓至設定腕帶壓爲止的步驟。因而’和採用前者之方 式的電子血壓計相比，測定時間變長。又，在採用後者之 方式的電子血壓計，加壓至血壓計算所需之腕帶壓以上的 設定腕帶壓爲止。因而，和採用前者之方式的電子血壓計 相比，作用於測定部位之壓力高，而有被測定者在被壓迫 200843698 時覺得痛的情況。因而，在電子血壓計變得小型、高 減少對被檢查者之負擔的情況，多採用前者之方式的 〇 在採用在將腕帶壓加壓的過程算出血壓之前者的 之電子血壓計，係以微速等加壓速度使腕帶壓上升之 加壓。在將腕帶壓加壓的過程之腕帶壓的加壓速度受 帶容積、測定部位的尺寸以及測定位置之人體的組織 軟性等的影響。又，腕帶壓的加壓速度亦受到腕帶壓 化本身的影響。 這些腕帶壓的加壓速度，受到從腕帶壓變動之振 化所檢測的壓脈波之形狀的影響。在測定時，若腕帶 加壓速度變化，壓脈波形狀就變化，而影響血壓測定 。此腕帶壓的加壓速度係和腕帶容積及壓力大有關係 爲表示此關係之一個指標，使用腕帶順應性。腕帶順 意指表示對腕帶壓力變化之腕帶的容積變化之數値。 腕帶壓變化△ P時之腕帶的容積變化爲△V，則對於腕 P之腕帶順應性Cp係以Cp = A ν/Δ P表示。即，腕帶 性表示將腕帶壓減壓（或增壓）1 m m H g所需的空氣容積 又，腕帶順應性C p係腕帶壓p之函數。第1 §圖 示腕帶順應性Cp和腕帶壓P之關係的示意圖。參照; 圖，雖然在腕帶壓P低時裝入相同之空氣容積，腕帶 不太上升，但是若腕帶壓P變高，裝入一些容積，腕 就容易上升。因而，如第18圖所示，腕帶壓p愈低壓 帶順應性Cp愈大。 速及 情況 方式 方式 到腕 之柔 之變 幅變 壓的 精度 。作 應性 若設 帶壓 順應 〇 係表 第18 壓亦 帶壓 ，腕 200843698 腕帶順應性Cp如第1 8圖所示，受到測定i 測定部位係腕時爲腕圍）或腕帶之尺寸（容積）等 照第1 8圖，在腕帶之尺寸小而且測定部位的尺 ，腕帶順應性Cp小。在腕帶之尺寸大而且測定 大之情況，腕帶順應性Cp大。 用以將腕帶壓以加壓速度V進行等速加壓 出流量Q，係對腕帶順應性Cp乘以設定加壓速 時間而得到（Q = CpxVx60)。即，自第18圖之關 之尺寸及測定部位的尺寸之將腕帶壓以等加壓 加壓時必要的輸出流量Q和腕帶壓P之關係如· 。第18圖及第19圖，表示腕帶之尺寸愈小而 的尺寸愈小，以愈少之空氣量將腕帶壓進行加 之尺寸愈大而且測定部位的尺寸愈大，爲了將 加壓（減壓）而需要愈多之空氣量。 即使施加固定流量將腕帶壓進行加壓，亦 積、測定部位的尺寸及測定位置之人體的組織 ，而腕帶壓的變化相異。因而，爲了變成目標 ，有因應於腕帶容積及人體的尺寸等而控制腕 速度的如下之方法。在將腕帶壓進行加壓時， 時間之腕帶壓上昇値。爲了使以微速將腕帶壓 的加壓速度變成既定之目標加壓速度，將對泵 壓（以下稱爲泵電壓）及電流進行回授控制。作 制腕帶壓的加壓速度之方法，例如特開2 0 0 6 -報（以下稱爲專利文獻1 )，在等速加壓方法，揭 部位的尺寸（ 的影響。參 寸小之情況 部位的尺寸 之必要的輸 度V和單位 係，各腕帶 速度V進行 第1 9圖所示 且測定部位 壓，而腕帶 腕帶壓進行 因爲腕帶容 之柔軟性等 之加壓速度 帶壓之加壓 檢測每單位 進行加壓時 所施加之電 爲上述之控 129920號公 示如下所示 200843698 之控制腕帶壓的加壓速度之方法。在從測定開始被加壓至 既定壓力後移至微速加壓，再從和2點之壓力對應的壓力 値和時間差求得平均加壓速度。從所求得之平均加壓速度 和目標加壓速度的差，將加壓手段之泵電壓進行回授控制 ，並控制泵之輸出流量，以變成目標加壓速度。 專利文獻1 :特開2006 — 1 29920號公報 【發明内容】 【發明要解決之課題】 可是，如在專利文獻1所揭示之將係加壓手段的泵電 壓進行回授控制，以控制微速加壓速度，使變成既定之目 標加壓速度的方法，可控制之泵電壓的範圍受到泵之特性 限制。因而，具有可測定之腕帶的尺寸（容積）或測定部位 之尺寸受到限制的問題。 具體而言，將使泵電壓以最小電壓（min)動作時之輸出 流量Q設爲輸出流量QMIN，將使泵電壓以最大電壓（MAX) 動作時之輸出流量Q設爲輸出流量QMΑΧ，在第20圖表示 在將腕帶壓以等加壓速度V進行加壓時必要的輸出流量Q 和腕帶壓Ρ之關係。自第20圖，從輸出流量QMIN至輸出 流量QMAX爲止之範圍Η，可說是爲了等加壓速度將腕帶 壓進行加壓而以泵電壓可控制之輸出流量Q的範圍（稱爲控 制範圍）。 在將腕帶壓以等加壓速度進行加壓時必要的輸出流量 Q係位於該控制範圍Η內，而且腕帶之尺寸及測定部位的 尺寸係第2 0圖所示之控制範圍Η的情況，藉由控制泵電壓 200843698 而可實現將腕帶壓以等加壓速度進行加壓的控制。 可是，如第1 9圖所示，腕帶之尺寸愈小而且測定部位 的尺寸愈小，將腕帶壓以等加壓速度進行加壓時必要的輸 出流量Q愈少，而腕帶之尺寸愈大而且測定部位的尺寸愈 大，必要的輸出流量Q愈多。因而，在爲了以速度V進行 等速加壓而必要的輸出流量係比輸出流量QMAX更多，並 位於比第20圖所示之控制範圍Η更上方的腕帶之尺寸及測 定部位的尺寸的情況，即在腕帶之尺寸及測定部位的尺寸 係比以泵電壓可控制之範圍更大的情況，腕帶壓之加壓速 度變成比作爲目標的加壓速度V更慢。又，在必要的輸出 流量係比輸出流量QM I Ν更少，並位於比第20圖所示之控 制範圍Η更下方的腕帶之尺寸及測定部位的尺寸的情況， 即在腕帶之尺寸及測定部位的尺寸係比以泵電壓可控制之 範圍更小的情況，腕帶壓之加壓速度變成比作爲目標的加 壓速度V更快。 尤其，在腕帶容積很小而且測定部位之尺寸小的情 況，顯著地出現該問題。在此情況，如上述所示腕帶壓之 加壓速度變成比目標加壓速度更快。因而，有進行血壓計 算之壓脈波資訊變少，而可能無法得到高測定精度的情況 之問題。 在電子血壓計之腕帶加壓手段採用隔膜泵的情況，泵 之輸出流量和腕帶壓的關係是，若腕帶壓高，因隔膜之容 積變化而產生的壓力和腕帶壓之差縮小，而泵的輸出流量 變少。又，因應於驅動泵之馬達的電壓而轉速變化，輸出 200843698 流量變化。因而，在電子血壓計使用隔膜泵的情況’藉由 根據泵之輸出流量和腕帶壓的關係來控制泵的馬達電壓’ 而利用回授控制控制腕帶壓之加壓速度，以變成目標加壓 速度。此時，在腕帶容積很小而且測定部位之尺寸小的情 況，爲了以速度V將腕帶壓進行等速加壓，而需要將泵之 馬達電壓設爲最小電壓（min)以下，進一步抑制轉速。可 是，如此控制時，馬達驅動扭矩降低，泵的馬達電壓和馬 達停止之上鎖電壓的差變小，而泵停止，發生無法加壓而 無法進行血壓測定的問題。此外，在以後之說明，將泵之 馬達電壓稱爲泵電壓。 本發明係鑑於這種問題而開發者，其目的在於提供一 種血壓測定裝置，其對各式各樣之測定部位的尺寸和與其 對應的各種腕帶之尺寸可進行等速加壓並能精確測定血 壓，尤其提供一種血壓測定裝置，其即使在腕帶尺寸小而 且測定部位之尺寸小的情況，亦可進行等速加壓並能精確 測定血壓。 【解決課題之方式】 爲了達成該目的，若依據本發明之某一形態，血壓測 定裝置包含有：測定用流體袋；供給部，係將流體供給測 定用流體袋；排出部，係從測定用流體袋排出流體；感測 器’係測定測定用流體袋的內壓；固定部，係將測定用流 體袋固定於測定部位；以及算出部，係在以供給部將流體 供給到被固定於測定部位之測定用流體袋的過程中，在測 定用流體袋的內壓按照所設定之加壓速度變化時，根據以 -10- 200843698 感測器所得之測定用流體袋的內壓，算出血壓，排 以供給部將流體供給測定用流體袋的過程中，從測 體袋排出流量因應於測定用流體袋之內壓變化的流 【發明之效果】 若使用本發明的血壓測定裝置，在採用根據將 加壓之過程的腕帶壓變動之振幅變化算出血壓的方 定血壓時，對各種的測定部位之尺寸和與其對應的 帶尺寸能精確測定血壓。尤其在腕帶尺寸小而且測 之尺寸小的情況能精確測定血壓。 【實施方式】 以下，一面參照圖式，一面說明本發明之實施 在以下之說明，對同一元件及構成元件賦與相同之 其等之名稱及功能亦相同。 參照第1圖，本實施形態之血壓測定裝置（以下 壓計）1，主要具備有本體2、及捲繞於係測定部位之 腕帶5，其等並以空氣管10連接。在本體2之正面 操作部3和顯示器4，而操作部3包含有：開關3 -用以指示測定之開始/停止；開關3 - 2，係用以指示 記錄之過去的資料等並顯示；以及開關3 - 3等，係 行設定時鐘的操作。將測定用空氣袋1 3 (參照第5 ! 於腕帶5。藉由將腕帶5捲繞於係測定部位之上腕 定用空氣袋1 3壓在測定部位。測定用空氣袋1 3係 述之測定用空氣系統2 0 (參照第3圖）進行膨脹/縮小 [第1實施形態] 出部在 定用流 體。 腕帶壓 式來測 各種腕 定部位 形態。 符號。 稱爲血 上腕的 ，配備 -1，係 叫出所 用以進 圖）配置 而將測 利用後 -11- 200843698 在第1實施形態之血壓計1，按開關3 — 1，從測定動 作開始至結束爲止，進行第2圖所示的動作。詳細說明之， 參照第2圖，在血壓計1，按開關3 - 1時，首先，執行等 速加壓控制，其係以等加壓速度將測定用空氣袋1 3之內壓 加壓的控制（步驟S 1 )，在既定之時序，再執行血壓測定（步 驟S2)。至血壓値決定爲止重複步驟S 1之等速加壓控制及 步驟S2的血壓測定，決定時（在步驟S3是YES)，一連串的 動作結束，而測定結束。 第3圖係表示第1實施形態的血壓計1，用以控制測 定用空氣袋1 3之內壓（腕帶壓）之增減壓並進行血壓測定的 功能構造之具體例的方塊圖。 參照第3圖，血壓計1包含有該測定用空氣袋1 3。測 定用空氣袋1 3係和測定用空氣系統20連接。在測定用空 氣系統2 0，包含有：壓力感測器2 3，係測定測定用空氣袋 1 3的內壓；泵2 1，係對測定用空氣袋1 3進行供氣/排氣； 以及控制閥22。 又，在血壓計 1，包含有·· CPU(Central Processing Unit)40，係控制血壓計1整體；放大器28，係和測定用空 氣系統20連接；泵驅動電路26;閥驅動電路27; A/D(Analog to Digital)轉換器29，係和放大器28連接；記憶體部41， 係記憶CPU40所執行之程式或測定結果；顯示器4，係顯 示測定結果等；以及操作部3。 CPU40根據從操作部3所輸入的操作信號執行記憶體 部4 1所記憶之既定的程式，並向泵驅動電路26及閥驅動 -12- 200843698 電路27輸出控制信號。泵驅動電路26及閥驅動電路27根 據控制信號驅動泵2 1及控制閥22，並執行血壓測定動作。 壓力感測器2 3檢測測定用空氣袋1 3的內壓，並向放 大器2 8輸入檢測信號。所輸入之壓力信號在放大器2 8被 放大至既定振幅，再在A/D轉換器29被轉換成數位信號 後’輸入C P U 4 0。C P U 4 0根據從壓力感測器2 3所得之測定 用空氣袋1 3的內壓，執行既定之處理，再因應於其結果向 泵驅動電路26及閥驅動電路27輸出該控制信號。又，CPU4〇 根據從壓力感測器2 3所得之測定用空氣袋1 3的內壓算出 血壓値，並爲了將測定結果顯示於顯示器4而輸出。 控制閥22係控制測定用空氣袋1 3內之空氣的排出之 閥。根據來自CPU40之控制信號，利用閥驅動電路27控制 控制閥22的開閉。在本發明未將控制閥22之構造限定爲 特定的構造。作爲具體例，可採用在專利第3 1 079 1 6號公 報所記載的流量控制閥、或在WO 9 8/3 45 3 8國際公開公報所 記載之電動排氣裝置等的機構。 更具體而言，在專利第3 1 079 1 6號公報所揭示的流量 控制閥，包含有經由以彈性材料所形成之墊圈開閉流出口 的驅動軸。藉由控制驅動驅動軸，而將墊圈Μ在流出口， 或離開流出口，而控制流體的流出。流出口的端部係和驅 動軸之移動方向正交的平坦面。揭示墊圈之相對於流出口 的面係和驅動軸之移動方向正交的平坦面。作爲墊圈之形 狀的具體例，在該公報表示相對於流出口的面係被斜切之 圓筒形狀。因爲墊圈係這種形狀，所以驅動軸逐漸驅動’ -13· 200843698 墊圏離開流出口，而流出口被打開時，流出口不會一下子 全開，而根據墊圈之斜向的角度逐漸排出被封閉之空氣。 在控制閥22係採用該流量控制閥之機構的情況，控制 閥22包含有驅動軸，其以閥驅動電路27控制驅動，並經 由以彈性材料所形成之墊圈開閉流出口。墊圈之形狀例如 係相對於流出口的面是被斜切之圓筒形狀。在利用閥驅動 電路27驅動成驅動軸離開測定用空氣袋1 3之流出口的情 況，根據墊圈之斜向的角度逐漸排出測定用空氣袋1 3內的 空氣。此外，控制閥22當然未限定爲這種形狀，如上述所 示，具備有以閥驅動電路27的控制可逐漸排出測定用空氣 袋1 3內之空氣的機構較佳。 第4圖係表示爲了控制控制閥22的關閉而以閥驅動電 路27所施加的控制電壓V和來自控制閥22之排氣流量Q 的關係圖。參照第4圖，因爲控制電壓V愈高驅動軸經由 墊圈壓住測定用空氣袋1 3之流出口的力愈強’所以來自控 制閥22的排氣流量Q變少。若控制電壓V低，驅動軸經由 墊圈壓住測定用空氣袋1 3之流出口的力愈小，所以來自控 制閥22的排氣流量Q變多。此外，在測定用空氣袋1 3的 內壓（腕帶壓）P1〜P3係按照此順序變高之關係的情況 (P1<P2<P3)，如第4圖所示，得知係腕帶壓P愈高’在既 定之控制電壓V的排氣流量Q愈多，又爲了使排氣流量Q 變成既定流量，有腕帶壓P愈高則所需之控制電壓v愈高 的關係。由第4圖所示之關係，導出腕帶壓P和來自控制 閥22的排氣流量Q係第5圖所示之關係。詳細說明之’參 -14 - 200843698 照第5圖，腕帶壓P愈高來自控制閥22的排氣流量Q愈增 加。又，在用以控制控制閥22之開閉的控制電壓V 1〜V3係 按照此順序變高之關係的情況（VI <V2<V3)，在既定之腕帶 壓P，控制電壓V愈高來自控制閥22的排氣流量Q愈少， 若控制電壓V低，則排氣流量Q多。 在以後之說明，如使用第20圖之說明所示，將用以控 制泵2 1之輸出流量Q的電壓（以下稱爲泵電壓）設爲最小電 壓（min)，並將測定用空氣袋13的內壓（腕帶壓）從P1加壓 至P2時之輸出流量Q設爲輸出流量QMIN。將泵電壓設爲 最大電壓（MAX)，並將腕帶壓從P1加壓至P2時之輸出流 量Q設爲輸出流量QMAX。將從輸出流量QMIN至輸出流量 QMAX爲止之範圍Η稱爲泵21的「控制範圍」。泵21的控 制範圍Η係以如將腕帶壓以等加壓速度加壓之泵電壓可控 制的泵2 1之輸出流量Q的範圍。 又，將爲了將腕帶壓以加壓速度V加壓所需之泵2 1的 輸出流量Q稱爲腕帶之「必要加壓流量」。必要加壓流量如 上述所示，腕帶之尺寸及測定部位的尺寸愈小愈少，腕帶 之尺寸及測定部位的尺寸愈大愈多。 在本實施形態，如第20圖所示，說明在測定用空氣袋 1 3的容量（腕帶之尺寸）及在測定部位之尺寸的必要加壓流 量位於比泵21之控制範圍Η更下的情況，即在腕帶之尺寸 及測定部位的尺寸比以如將腕帶壓以等加壓速度加壓之泵 電壓可控制的範圍更小之情況，以所預設之目標的等加壓 速度將腕帶壓加壓之方式控制的控制方法，其係在該步驟 -15- 200843698 s 1之等速加壓控制的控制方法。在以後之說明，將所預設 之目標的等加壓速度稱爲「目標速度」。 [控制方法1 ] 第6圖係說明在步驟s 1之等速加壓控制的控制方法1 的圖。控制方法1係將泵電壓設爲至少最小電壓（min)，而 CPU4 0以將腕帶壓以目標速度加壓的方式控制泵21之輸出 流量Q及來自控制閥22的排氣流量之方法。在將腕帶壓以 等加壓速度從P1加壓至P2時，在將腕帶壓從P0加壓至 P 1的過程（過程I )檢測腕帶的加壓速度。在所測定之加壓 速度比目標速度更快的情況，在該步驟S 1執行控制方法1 之處理。 詳細說明之，第6圖之（A)部分表示在控制方法1中之 必要加壓流量Q和腕帶壓P之關係。參照第6圖之（A)部分， 在控制方法1，CPU40在將腕帶壓從P0加壓至P1的過程（過 程I )，設定變成至少最小電壓（miη)之泵電壓，以降低泵 2 1之輸出流量Q。此外，即使在此泵電壓之設定腕帶壓的 加壓速度亦比目標速度更快之情況，因爲泵之輸出流量太 多，所以至變成和在已設定腕帶之必要加壓流量的泵電壓 的輸出流量Q —致爲止，CPU40進行從控制閥22洩漏空氣 的控制。在此控制，將在過程I腕帶之等速加壓所需的必 要加壓流量提高至在至少最小電壓（miη)之泵電壓的泵21 之輸出流量QMIN爲止。 接著，在將腕帶壓從Ρ1加壓至Ρ2的過程（過程Π )， CPIH0 —面逐漸關閉已打開既定量之控制閥22，而朝向減 -16- 200843698 少來自控制閥22之排氣流量的方向控制，一面以所設定之 泵電壓將腕帶壓加壓，以便腕帶之必要加壓流量能與所設 定泵電壓時之泵2 1的輸出流量一致（保持一致之狀態）。在 此控制，在過程Π將腕帶壓以等加壓速度加壓。 又，在控制方法1，作爲在該過程I控制來自控制閥 22之排氣流量的方法，可採用第6圖之（B)部分所示的2種 方法（型式1、型式2)。第6圖之（B)部分表示在控制方法1 之來自控制閥的排氣流量Q和腕帶壓P之關係。參照第6 圖之（B)部分，型式1係預先將控制閥22在起始狀態至少 打開一部分，並爲了使排氣流量從那時的排氣流量Qa減少 至和在所設定之泵電壓的輸出流量Q —致爲止，而在該過 程I朝向關閉控制閥22之方向控制的方法。型式2係預先 在起始狀態關閉控制閥22，並爲了使排氣流量從那時的排 氣流量Q0增加至和在所設定之泵電壓的輸出流量Q —致爲 止，而在該過程I朝向打開控制閥22之方向控制的方法。 此外’在過程Π控制閥22完全關閉，在那時刻以後之 腕帶的必要加壓流量變成泵2 1之控制範圍Η的情況，即在 過程Π某時刻以後，在一般之僅藉泵電壓的控制能將腕帶 壓以等加壓速度加壓的情況，進行第7圖之（Α)部分所示的 控制。第7圖之（Α)部分表示在控制方法1之必要加壓流量 Q和腕帶壓Ρ的關係。在腕帶壓是P a ( ρ 1 <P a <Ρ 2 )的時刻， 當作和在係已設定腕帶之必要加壓流量的最小電壓（min) 之泵電壓的輸出流量QM I N —致。將腕帶壓從ρ 1被加壓至 P2爲止的過程Π之中從P1被加壓至Pa爲止的過程設爲過 -17- 200843698 程E -1，從Pa被加壓至P2爲止的過程設爲過程π -2。 第7圖之（Β)部分表示在控制方法1之來自控制閥的排 氣流量Q和腕帶壓Ρ之關係。參照第7圖之（Β)部分，上述 的情況，CPU40在過程Π — 1控制成完全關閉控制閥22， 若腕帶之必要加壓流量變成和輸出流量QM I Ν —致，就結束 控制閥2 2的控制。在過程Π — 2，C P U 4 0控制泵電壓，以 使泵2 1之輸出流量Q變成和腕帶壓的必要加壓流量一致。 在此控制，在過程Π - 2以等加壓速度將腕帶壓加壓。 第8圖係表示在該步驟S 1之等速加壓控制進行控制方 法1之控制的情況之在血壓計1的動作之流程圖，係表示 第2圖之步驟S 1的細節之流程圖。第8圖之流程圖所示的 處理，係在該過程I以上述之型式2的方法控制來自控制 閥22之排氣流量的情況之處理，即預先在起始狀態完全關 閉控制閥22，並在該過程I朝向打開之方向控制的情況之 處理。第8圖之流程圖所示的處理，係藉由CPU40讀出記 憶體部4 1所記憶之程式並執行，並控制第3圖所示之各部 而實現。 參照第8圖，在血壓計1，按開關3 - 1時，首先，在 步驟SI 1，CPU40將控制閥22的控制電壓Υ設定成完全關 閉控制閥22之電壓値Υ1。然後，在步驟S13，CPU40將泵 電壓X設定成遠低於最大電壓（MAX)之起始電壓値Xl(至少 約最小電壓（nun))。 接著，CPU40根據來自壓力感測器23之感測器信號而 得到腕帶壓的加壓速度，並判斷加壓速度是否和所設定之 -18· 200843698 目標速度一致、及泵電壓X是否達到最小電壓（min)(步驟 S15)。 在步驟S15，在CPU40判斷這些任一條件都未滿足的 情況（在步驟S 1 5是NO)，即腕帶壓的加壓速度和目標速度 不一致，而且泵電壓X未達到最小電壓（min)。此時，在腕 帶壓的加壓速度比目標速度快的情況（在步驟S 1 7是 YES)，CPU40將栗電壓X減少既定値（α 1)(步驟S19)，再 進行該步驟S 1 5之判斷。另一方面，在腕帶壓的加壓速度 比目標速度慢的情況（在步驟S 17是NO)，CPU40將泵電壓 X增加既定値（α 1)(步驟S21)，再進行該步驟S15之判斷。 即，至泵電壓X達到最小電壓（miη)爲止，或腕帶壓的加壓 速度變成和目標速度一致爲止，CPU40在腕帶壓的加壓速 度比目標速度快的情況，控制成降低泵2 1之輸出流量。在 腕帶壓的加壓速度比目標速度慢的情況，控制成提高泵2 1 之輸出流量。至CPU40判斷在步驟S15滿足該2個條件之 任一方爲止，重複進行步驟S15〜S21之處理。 重複該步驟S19，在步驟S15，CPU40判斷泵電壓X已 達到最小電壓（min)(在步驟S15是YES)。此時，在腕帶壓 的加壓速度比目標速度快的情況（在步驟S23是NO，而且 在步驟S25是YES)，至腕帶壓的加壓速度變成和目標速度 一致爲止，CPU40重複進行將控制閥22之控制電壓Y減少 既定値（/3 1)的處理（步驟S 27)，即打開控制閥22之方向的 控制。另一方面，在腕帶壓的加壓速度比目標速度慢的情 況（在步驟S23是NO,而且在步驟S25是N〇），至腕帶壓的 -19- 200843698 加壓速度變成和目標速度一致爲止，CPU40重複進行將控 制閥22之控制電壓Y增加既定値（/3 1)的處理（步驟S 29)， 即關閉控制閥22之方向的控制。此外，在重複步驟S29的 處理中，若判斷控制閥22之控制電壓Y達到電壓値Y 1 (在 步驟S30是YES)，即檢測到控制閥22完全關閉時，CPU40 重複進行自步驟S 1 5的處理。 在步驟S15，若CPU40判斷腕帶壓的加壓速度和目標 速度一致（在步驟S15是YES，而且在步驟S23是YES)，就 開始進行該步驟S 2的血壓測定。 CPU40至血壓値決定爲止重複進行該步驟S15〜S30之 處理及步驟S 2的血壓測定，血壓値決定時（在步驟S 3是 YES)，結束一連串的動作。這樣測定就結束。 第9圖係表示在該步驟S 1之等速加壓控制進行控制方 法1之控制的情況之在血壓計1的動作之流程圖，係表示 第2圖之步驟S 1的細節之流程圖。第9圖之流程圖所示的 處理，係在該過程I以上述之型式1的方法控制來自控制 閥22之排氣流量的情況之處理，即預先在起始狀態將控制 閥22打開至少一部分，並在該過程I朝向關閉之方向控制 的情況之處理。第9圖之流程圖所示的處理，亦又是在血 壓測定開始時所執行之處理，藉由CPU40讀出記憶體部4 1 所記憶之程式並執行，並控制第3圖所示之各部而實現。 參照第9圖，在血壓計1，按開關3 — 1時，首先，在 步驟S3 1，CPU40將控制閥22的控制電壓Y設定成打開控 制閥22的至少一部分之既定的電壓値Y2。因而，打開控 -20- 200843698 制閥22的至少一部分。然後，在步驟S3 3，CPU40將泵電 壓X設定成遠低於最大電壓（MAX)之起始電壓値XI (至少約 最小電壓（m i η))。 接著，CPU40根據在此狀態來自壓力感測器23之感測 器信號而得到腕帶壓的加壓速度，並判斷加壓速度是否和 所設定之目標速度一致、及控制閥22的控制電壓Υ是否達 到將控制閥22完全關閉之電壓値Υ1 (步驟S35)。 在步驟S35，在CPU40判斷這些任一條件都未滿足的 情況（在步驟S35是NO)，即腕帶壓的加壓速度和目標速度 不一致，而且控制閥22的控制電壓Y未達到將控制閥22 完全關閉之電壓値Y 1。此時，在腕帶壓的加壓速度比目標 速度快的情況（在步驟S37是YES)，CPU40將控制閥22的 控制電壓Y減少既定値（α 2)(步驟S39)，再進行該步驟S35 之判斷。另一方面，在腕帶壓的加壓速度比目標速度慢的 情況（在步驟S37是NO)，CPU40將控制閥22的控制電壓Υ 增加既定値（α 2)(步驟S41)，再進行該步驟S35之判斷。 即，至控制閥22完全關閉爲止，或腕帶壓之加壓速度和目 標速度一致爲止，CPU40在腕帶壓的加壓速度比目標速度 快的情況’控制成稍微打開控制閥22，以提高來自控制閥 22之排氣流量。在腕帶壓的加壓速度比目標速度慢的情 況’控制成稍微關閉控制閥2 2，以降低來自控制閥2 2之排 氣流量。至CPU40判斷在步驟S35滿足該2個條件之任一 方爲止，重複進行步驟S35〜S41之處理。 重複該步驟S41，在步驟S35，CPU40判斷控制閥22 -21- 200843698 的控制電壓Y達到電壓値Υ 1，而控制閥22完全關閉（在步 驟S 3 5是YES)。此時，在腕帶壓的加壓速度比目標速度快 的情況（在步驟S43是NO，而且在步驟S45是YES)，至腕 帶壓的加壓速度變成和目標速度一致爲止，CPU40重複進 行將泵電壓X減少既定値（/3 2)的處理（步驟S 47)，即降低 泵2 1之輸出流量的方向之控制。另一方面，在腕帶壓的加 壓速度比目標速度慢的情況（在步驟S4 3是N〇，而且在步 驟S45是NO)，至腕帶壓的加壓速度變成和目標速度一致 爲止，CPU40重複進行將泵電壓X增加既定値（/3 2)的處理 (步驟S 49)，即提高泵21之輸出流量的方向之控制。 在步驟S35，若CPU40判斷腕帶壓的加壓速度和目標 速度一致（在步驟S35是YES)，或重複進行該處理，而在步 驟S43判斷腕帶壓的加壓速度和目標速度一致（在步驟S43 是YES)，就開始進行該步驟S2的血壓測定。 CPU40至血壓値決定爲止重複進行該步驟S35〜S49之 處理及步驟S2的血壓測定，血壓値決定時（在步驟S3是 YES)，結束一連串的動作。這樣測定就結束。 本實施形態之血壓計1的CPU40，係在該步驟S1執行 以上之控制方法1的等速加壓控制，並控制來自控制閥22 之排氣流量，因爲腕帶之尺寸及測定部位的尺寸小’腕帶 之必要加壓流量比將泵電壓設爲最小電壓（min)時之輸出 流量QM I N更小，即使在將泵電壓設爲最小電壓（m i η )亦無 法將腕帶壓以等加壓速度加壓的情況，亦調整腕帶之必要 加壓流量。因而，在本實施形態之血壓計1，將腕帶壓以 -22- 200843698 等加壓速度加壓。結果，在本實施形態之血壓計 係腕帶之尺寸小而且測定部位的尺寸小之情況， 地以作爲目標之加壓速度將腕帶壓加壓。 [控制方法2 — 1 ] 第1 0圖係說明在步驟S 1之等速加壓控制的 2 - 1的圖。控制方法2 - 1係將泵電壓設爲既定電 CPU40以按照所設定的泵電壓將腕帶壓以目標之 度加壓的方式來自控制閥22之排氣流量的方法。 壓以等加壓速度從P 1加壓至P2時，在將腕帶壓毛 至Ρ1的過程（過程I )檢測腕帶的加壓速度。在所 壓速度比目標速度更快的情況，在該步驟S 1執行 2 _ 1之處理。 詳細說明之，第1 〇圖表示在控制方法2 — 1 壓流量Q和腕帶壓Ρ的關係。參照第1 0圖，在g - 1，預先將泵電壓設定成既定電壓値VS。在以核 將既定電壓値VS稱爲「基本電壓VS」，並將泵電 電壓VS時之泵21的輸出流量作爲基本流量qS。 壓從P0加壓至P1的過程I ，至腕帶之必要加壓 和基本流量QS —致爲止，CPU40控制來自控制g 氣流量。在此控制，將在過程I腕帶之必要加壓 至基本流量QS爲止。即，在過程I ，CPU40進行 22洩漏腕帶內之空氣的控制，能以加壓速度v等 流量作爲基本流量QS。 接著，在將腕帶壓從P1加壓至P 2的過程π 1，即使 亦可精確 控制方法 壓値，而 等加壓速 在將腕帶 έ P 0加壓 測定之加 控制方法 之必要加 【制方法2 ί之說明， 壓係基本 在將腕帶 流量變成 3 2 2之排 里提局 自控制閥 速加壓泵 ’ CPU40 -23- 200843698 爲了使腕帶之必要加壓流量變成和基本流量QS 一致（保持 一致之狀態）’ 一面逐漸關閉已打開既定量之控制閥22， 而朝向減少來自控制閥22之排氣流量的方向控制，一面將 所設定之泵電壓作爲基本電壓VS並將腕帶壓加壓。在此控 制，在過程Π將腕帶壓以等加壓速度加壓。 又’在控制方法2 - 1，作爲在該過程I控制來自控制 閥22之排氣流量的方法，可採用使用第6圖之（B)部分所 說明的2種方法（型式1、型式2)。 此外’腕帶之尺寸及測定部位的尺寸係腕帶之必要加 壓流量變成基本流量QS以上的大小，在腕帶壓的加壓速度 比目標速度慢的情況，CPU40爲了以目標速度將腕帶壓加 壓，而在從輸出流量QM IN至輸出流量QMAX爲止的控制範 圍Η之中的從基本流量QS至輸出流量QMAX爲止之控制範 圍控制泵電壓。 第1 1圖係表示在該步驟S 1之等速加壓控制進行控制 方法2 - 1之控制的情況之在血壓計1的動作之流程圖，係 表示第2圖之步驟S 1的細節之流程圖。第1 1圖之流程圖 所示的處理，係在該過程I以上述之型式2的方法控制來 自控制閥22之排氣流量的情況之處理，即預先在起始狀態 完全關閉控制閥22，並在該過程I朝向打開之方向控制的 情況之處理。第1 1圖之流程圖所示的處理，亦係藉由CPU40 讀出記憶體部4 1所記憶之程式並執行，並控制第3圖所示 之各部而實現。 參照第1 1圖，首先，在步驟S61，CPU40將控制閥22 -24- 200843698 的控制電壓Y設定成完全關閉控制閥2 2之電壓値Υ 1。然 後，在步驟S63，CPU40將泵電壓X設定成所預設之基本電 壓値V S。 接著，CPU40根據來自壓力感測器23之感測器信號而 得到腕帶壓的加壓速度，並判斷加壓速度是否和所設定之 目標速度一致（步驟S65)。 在步驟S65，假設在CPU40判斷腕帶壓之加壓速度和 所設定之目標速度不一致（步驟S 60爲否）。此時，在腕帶 壓的加壓速度比目標速度快的情況（在步驟S67爲是），至 腕帶壓的加壓速度和所設定之目標速度一致爲止，CPU40 重複進行將控制閥22的控制電壓Υ減少既定値（/3 3)的處 理（步驟S 69)，即打開控制閥22之方向的控制。另一方面， 在腕帶壓的加壓速度比目標速度慢的情況（在步驟S67爲 否），至腕帶壓的加壓速度變成和目標速度一致爲止，CPU40 重複進行將控制閥22之控制電壓Υ增加既定値（/3 3)的處理 (步驟S 7 1 )，即關閉控制閥2 2之方向的控制。 在步驟S65，若CPU40判斷腕帶壓的加壓速度和目標 速度一致（在步驟S 6 5是Y E S)，就開始進行該步驟s 2的血 壓測定。 第1 1圖所示之在該步驟S 1的等速加壓控制，亦在該 步驟S 2 —面將腕帶等速加壓一面進行血壓測定間，重複至 在步驟S 3決定血壓値，而血壓測定動作結束爲止。 本實施形態之血壓計1的C P U 4 0，係在該步驟s 1執行 以上之控制方法2 - 1的等速加壓控制，並控制來自控制閥 -25- 200843698 22之排氣流量，而泵2 1採用泵電壓之控制範圍窄的泵，又 因爲腕帶之尺寸及測定部位的尺寸小，以速度V進行等速 加壓所需之腕帶的必要加壓流量比將泵電壓設爲最小電壓 (min)時之輸出流量QMIN更小，即使在將泵電壓設爲最小 電壓（m i η )亦無法將腕帶壓以等加壓速度加壓的情況，亦調 整腕帶之必要加壓流量。因而，在本實施形態之血壓計1， 可將腕帶壓以等加壓速度加壓。 即使腕帶之尺寸及/或測定部位的尺寸相異，亦爲了了 藉由用泵控制輸出流量而可將腕帶以等速加壓，作爲泵所 使用的馬達，係可從低速至高速控制轉速之馬達，而且需 要即使在低速亦難受到負載扭矩影響的特殊馬達。因而， 價格變貴。可是，在本實施形態之血壓計1，亦可馬達之 轉速的範圍不寬。因而，可使用比較便宜的馬達。結果， 可使血壓計之價格變低、泵變成小型及變輕。 在控制方法2 — 1，亦如第7圖之（Α)部分所示，在過程 Π控制閥22完全關閉後’若腕帶之必要加壓流量變成控制 範圍Η之中的從基本流量qS至最大電壓（Μαχ)時之輸出流 里QMAX爲止的範圍’在腕帶之必要加壓流量變成該範圍 的時刻以後，如第9圖之流程圖所示，藉由調整泵電壓並 控制泵2 1的輸出流量，而可將腕帶壓以目標速度加壓。 [控制方法2 — 2 ] 此外’作爲控制方法2 - 1之變形例亦可在該步驟s 1 進行第1 2圖所示之控制方法2 一 2的等速加壓控制。第工2 圖表示在控制方法2 - 2之必要加壓流量q和腕帶壓p的關 -26- 200843698 係。參照第12圖，在控制方法2 — 2，自如第1 3圖所示之 預定的腕帶之尺寸和泵電壓的設定値之對應關係，因應於 腕帶之尺寸將泵電壓設定成基本電壓V S。以後，和控制方 法2 - 1 一樣，在將腕帶壓從p〇加壓至p 1的過程〗，至腕 帶壓的必要加壓流量變成和因應於腕帶之尺寸所設定的基 本電壓VS對應之基本流量QS —致爲止，CPU40控制來自 控制閥22的排氣流量。 如第1 3圖所示的腕帶之尺寸和泵電壓的設定値之對應 關係，例如以表形式之資料預先記憶於記憶體部4 1。或亦 可係其他的形式之資料。 在控制方法2 — 2之等速加壓控制，CPU40自在該過程 I所檢測之加壓速度檢測腕帶的尺寸，藉由參照第1 3圖所 示的對應關係而設定因應於腕帶之尺寸的基本電壓VS。 或，亦可在操作部3包含有腕帶尺寸按鈕等的選擇腕帶之 尺寸的手段，且CPU40因應於根據使用者之操作的來自操 作部3之操作信號而設定，亦可預先內定成任一個基本電 壓VS，再按照如上述所示的根據使用者之操作的來自操作 部3之操作信號而變更。 又，在將腕帶壓從P0加壓至P1的過程I ，亦可作成 在檢測起始之加壓速度時，CPU40藉由檢測加壓速度而判 定腕帶的尺寸，並從所準備之多段的泵電壓之中設定因應 於所判定腕帶尺寸的泵電壓。 又，在腕帶5所具備之係在將腕帶5捲繞於測定部位 時固定終端的部分之插口（未圖示），設置作爲檢測腕帶尺 -27- 200843698 寸的手段之例如凸構造。而且，利用該手段檢測腕帶尺寸， 再如上述所示，CPU40從所準備之多段的泵電壓之中設定 因應於所檢測的腕帶尺寸之泵電壓。 關於設定泵電壓後之來自控制閥22的排氣流量之控 制’係和在第1 1圖所示之控制方法2的控制一樣。 本實施形態之血壓計1的CPU40係在該步驟S1執行以 上之控制方法2 - 2的等速加壓控制，在腕帶之尺寸大而且 測定部位的尺寸大之情況，將泵電壓設定成高的基本電壓 V S 1。在腕帶之必要加壓流量比泵電壓係基本電壓v S 1時 之泵21的基本流量QS1更低之情況，控制來自控制閥22 之排氣流量，以使腕帶之必要加壓流量變成和基本流量QS 1 一致。又，在腕帶之尺寸及測定部位的尺寸係標準的情況， 將泵電壓設定成程度中的基本電壓VS2。在腕帶之必要加 壓流量比泵電壓係基本電壓VS2時之泵21的基本流量QS 2 更低之情況，控制來自控制閥22之排氣流量，以使腕帶之 必要加壓流量變成和基本流量QS 2 —致。又，在腕帶之尺 寸小而且測定部位的尺寸小之情況，將泵電壓設定成低的 基本電壓 V S 3。在腕帶之必要加壓流量比泵電壓係基本電 壓V S 3時之泵2 1的基本流量QS 3更低之情況，控制來自控 制閥22之排氣流量，以使腕帶之必要加壓流量變成和基本 流量QS 3 —致。結果，即使腕帶之尺寸及測定部位的尺寸 係各式各樣之情況，亦因爲因應於其尺寸而設定泵基本電 壓’所以可使等速加壓之控制閥的控制範圍變成比在控制 方法2 — 1之控制範圍更窄的範圍。因而，等速加壓控制比 -28- 200843698 控制方法2— 1更容易，加壓速度精度亦提高。 [第2實施形態] 第1 4圖係表示第2實施形態的血壓計1之用以控制測 定用空氣袋1 3的內壓之增減壓並進行血壓測定的功能構 造之具體例的方塊圖。 參照第1 4圖，第2實施形態的血壓計1係替代第3圖 所示之第1實施形態的血壓計1之控制閥22，而在測定用 空氣系統20包含有急速排氣閥31及微速排氣閥32。 急速排氣閥3 1係控制測定用空氣袋1 3內之空氣的排 出之閥。根據來自CPU40之控制信號利用閥驅動電路27 控制急速排氣閥3 1的開閉。主要在血壓測定結束時等，藉 由急速排氣閥3 1打開而急速地排出測定用空氣袋1 3內之 空氣。 微速排氣閥3 2係橡膠閥等。其具體之構造在本發明未 限定爲特定的構造。具體而言，作爲微速排氣閥3 2之構 造’可採用在特開昭6 1 - 27203 3號公報所記載之微速排氣 閥、或特公平6 - 8 5 7 6 4號公報所記載的氣體流通閥等之機 構。 更具體而言’在特開昭6 1 - 27 203 3號公報所記載之微 速排氣閥，包含有中空構造的調整部。在調整部設置有將 外部和中驅連通的開縫。貫穿開縫，設置銷。利用此銷， 開縫之開口量因應於排氣壓而變。 弟15圖係表不來自微速排氣閥32之排氣流量q和腕 帶壓P (測定用空氣袋1 3的內壓）的關係圖。參照第1 5圖， -29- 200843698 腕帶壓P愈高微速排氣閥32之開縫的開口量愈小，排氣流 量Q愈少，而腕帶壓P愈低微速排氣閥3 2之開縫的開口量 愈大，排氣流量Q愈多。 第1 6圖表示在第2實施形態之血壓計1的必要加壓流 量Q和腕帶壓P之關係。此外，第1 6圖之實線表示在微速 排氣閥3 2未排氣時以加壓速度V進行等速加壓所需之腕帶 的必要加壓流量。第1 6圖之虛線表示在微速排氣閥3 2排 氣時以加壓速度V進行等速加壓所需之腕帶的必要加壓流 量。 如第1 5圖所示，藉由在測定用空氣系統20包含有微 速排氣閥3 2，而從微速排氣閥3 2排出流量係因應於腕帶壓 之測定用空氣袋1 3內的空氣。因而，在測定用空氣系統20 包含有微速排氣閥32的情況（第16圖之虛線），腕帶之必要 加壓流量和從微速排氣閥32未排氣的情況（第1 6圖之實線） 相比’從微速排氣閥拽漏之流量整體上變成更多。尤其， 腕帶壓愈低，腕帶之必要加壓流量愈多。 如第1 6圖所示，藉由本實施形態之血壓計1的測定用 空氣系統20係包含有微速排氣閥；3 2之構造，而提高以加 壓速度V進行等速加壓所需之腕帶的必要加壓流量，變成 控制範圍Η。因而，尤其因爲腕帶之尺寸及測定部位的尺 寸小’腕帶的必要加壓流量比將泵電壓設爲最小電壓（miη) 時的輸出流量QM I Ν更小，即使係將泵電壓設爲最小電壓 (miη)亦無法將腕帶壓以等加壓速度加壓的情況，亦可將腕 帶壓以等加壓速度加壓。結果，即使係腕帶之尺寸及測定 -30- 200843698 部位的尺寸小的情況’亦在根據將腕帶壓加壓之過程的腕 帶壓變動之振幅變化算出血壓的方式之血壓計’可精確地 測定血壓。 在此，第2實施形態之血壓計1的該構造之變形例如 第1 7圖所示，亦可微速排氣閥32係未包含於測定用空氣 系統20，而和測定用空氣袋1 3連接之構造。又，亦可係微 速排氣閥32僅和特定之尺寸的小腕帶（測定用空氣袋1 3) 連接之構造。具體而言，如上述所示，因爲第2實施形態 η ' 之血壓計1的構造特別適合腕帶之尺寸及測定部位的尺寸 小之情況，所以亦可係微速排氣閥3 2僅和尺寸小的腕帶連 接之構造。此外，亦可作爲可拆裝微速排氣閥3 2之構造， 作成因應於測定部位的尺寸，具體而言在腕圍小的情況， 連接微速排氣閥32。 應認爲這次所揭示之實施形態在所有的事項上係舉例 表示，不是用以限制的。本發明之範圍不是上述的說明， 而以申請專利範圍表示，並包含和申請專利範圍具有同等 ί / . 的意義及範圍內之所有的變更。 【圖式簡單說明】 第1圖係表示實施形態之血壓計的外觀之具體例的立 體圖。 第2圖係表示第1實施形態之血壓計的動作之流程圖 〇 第3圖係表示第1實施形態之血壓計的功能構造之具 體例的方塊圖。 -31 - 200843698 第4圖係表示控制電壓V和來自控制閥之排氣流量Q 的關係圖。 第5圖係表示腕帶壓P和來自控制閥之排氣流量Q的 關係圖。 第6圖係說明在步驟S 1之等速加壓控制的控制方法1 的圖。 第7圖係說明在步驟S 1之等速加壓控制的控制方法1 的圖。 第8圖係表示以等速加壓控制進行控制方法1之等速 加壓控制的情況之在血壓計的動作之流程圖。 第9圖係表示以等速加壓控制進行控制方法1之等速 加壓控制的情況之在血壓計的動作之流程圖。 第1 0圖係說明在步驟S1之等速加壓控制的控制方法 2 — 1的圖。 第1 1圖係表示以等速加壓控制進行控制方法2 - 1之 等速加壓控制的情況之在血壓計的動作之流程圖。 第1 2圖係說明在步驟S 1之等速加壓控制的控制方法 2 — 2的圖。 第1 3圖係表示腕帶之尺寸和泵電壓的設定値之對應 關係的具體例之圖。 第1 4圖係表示第2實施形態之血壓計的功能構造之具 體例的方塊圖。 第1 5圖係表示來自微速排氣閥之排氣流量Q和腕帶 壓P的關係圖。 -32- 200843698 第1 6圖係說明第2實施形態之腕帶的必要加壓流量和 控制範圍Η之關係圖。 第1 7圖係表示第2實施形態之變形例的血壓計之功能 構造的具體例之方塊圖。 第1 8圖係表示腕帶順應性Cp和腕帶壓Ρ之關係及腕 帶順應性Cp和測定部位（腕）的尺寸（腕圍）、或腕帶之尺寸（ 容積）等的關係圖。 第1 9圖係表示腕帶之必要加壓流量Q和腕帶壓P的 關係圖。 第20圖係表示腕帶之必要加壓流量Q和控制範圍Η 的關係圖。 【主要元件符號說明】 1 血壓計 2 本體 3 操作部 4 顯示器 5 腕帶 10 空氣管 13 測定用空氣袋 20 測定用空氣系統 21 泵 22 控制閥 23 壓力感測器 26 泵驅動電路 -33- 200843698[Technical Field] The present invention relates to a blood pressure measuring device, and more particularly to a blood pressure measuring device that fixes a wristband to a living body and performs blood pressure measurement. [Prior Art] When blood pressure is measured, a wristband including a blood-strapping tape of a fluid bag for blood pressure measurement is wound around a part of a living body and fixed, and the fluid bag is then subjected to pressure increase and decompression. The method of calculating the blood pressure of the compressed blood vessel by changing the amplitude of the wristband pressure fluctuation by increasing or decreasing the pressure of the wristband wound around one part of the living body is called an oscilloscope method. An electronic sphygmomanometer using an oscilloscope method includes an electronic sphygmomanometer that calculates a blood pressure based on a change in amplitude of a wristband pressure change during a process of pressing a wristband; and a pressure applied to a set wristband pressure An electronic sphygmomanometer that calculates the blood pressure in the amplitude change of the wristband pressure during the post-decompression process. In the electronic sphygmomanometer using the latter method, first, the pressure is applied to the wristband pressure equal to or greater than the wristband pressure required for blood pressure calculation. Thus, the output flow required for the pump for injecting fluid into the fluid bag is larger than that of the electronic sphygmomanometer in the former manner, and a large pump is required. Further, the measurement operation of the electronic sphygmomanometer using the latter method includes a step of pressurizing the wristband pressure after the measurement is started. Therefore, the measurement time becomes longer as compared with the electronic sphygmomanometer which adopts the former. Further, the electronic sphygmomanometer using the latter method is pressurized until the wristband pressure equal to or greater than the wristband pressure required for blood pressure calculation. Therefore, compared with the electronic sphygmomanometer of the former method, the pressure applied to the measurement site is high, and the subject feels pain when pressed 200843698. Therefore, in the case where the electronic sphygmomanometer is small and high, and the burden on the examinee is reduced, the electronic sphygmomanometer in which the blood pressure is calculated by the process of pressurizing the wristband is used. The pressurization of the wristband pressure is increased at a pressing speed such as a micro speed. The pressurization speed of the wristband pressure in the process of pressurizing the wristband is affected by the volume of the belt, the size of the measurement site, and the softness of the human body at the measurement position. Moreover, the compression speed of the wristband pressure is also affected by the wristband compression itself. The pressurizing speed of these wristband pressures is affected by the shape of the pulse wave detected by the vibration of the wristband pressure fluctuation. During the measurement, if the pressure of the wristband changes, the shape of the pulse wave changes, which affects the blood pressure measurement. The pressure rate of this wristband pressure is related to the volume and pressure of the wristband. It is an indicator of this relationship and uses wristband compliance. The wristband refers to the number of changes in the volume of the wristband that changes the pressure of the wristband. When the wristband pressure changes ΔP, the volume change of the wristband is ΔV, and the wristband compliance Cp of the wrist P is expressed by Cp = A ν / Δ P . That is, the wristband indicates the air volume required to decompress (or pressurize) the wristband by 1 m m H g, and the wristband compliance C p is a function of the wristband pressure p. The first § shows a schematic diagram of the relationship between the wristband compliance Cp and the wristband pressure P. Referring to the figure, although the wristband does not rise when the wristband pressure P is low, the wristband does not rise much, but if the wristband pressure P becomes high, the wrist is easily raised by loading some volume. Therefore, as shown in Fig. 18, the higher the wristband pressure p, the greater the compliance Cp. The speed and the way of the way to the softness of the wrist change the accuracy of the amplitude change. If the pressure is compliant, the 18th pressure is also applied. The wrist 200843698 wristband compliance Cp is shown in Figure 18. It is measured by the measurement of the position of the wrist when the wrist is the wristband or the size of the wristband. (Volume) In the case of Fig. 18, the size of the wristband is small and the gauge of the measurement site is small, and the wristband compliance Cp is small. In the case where the size of the wristband is large and the measurement is large, the wristband compliance Cp is large. The constant velocity pressurization flow rate Q is used to press the wrist strap at a pressurizing speed V, which is obtained by multiplying the wristband compliance Cp by the set pressurization speed time (Q = CpxVx60). That is, the relationship between the output flow rate Q and the wristband pressure P necessary for pressing the wristband with equal pressure and pressure from the size of the closing angle of Fig. 18 and the size of the measurement portion is as shown. Figures 18 and 19 show that the smaller the size of the wristband, the smaller the size. The smaller the amount of air, the larger the size of the wristband and the larger the size of the measurement site, in order to pressurize (minus) The amount of air that needs to be increased. Even if a fixed flow rate is applied to pressurize the wristband pressure, the size of the measurement site and the tissue of the measurement site are measured, and the changes in the wristband pressure are different. Therefore, in order to become a target, there is a method of controlling the wrist speed in response to the volume of the wristband and the size of the human body. When the wristband is pressed, the wrist band pressure rises. In order to change the pressurizing speed of the wristband pressure at a slight speed to a predetermined target pressurizing speed, the pumping pressure (hereinafter referred to as pump voltage) and current are feedback-controlled. A method of making a pressurizing speed of a wristband pressure, for example, a special opening method (hereinafter referred to as Patent Document 1), in the case of a constant-speed pressing method, the size of the exposed portion (the influence of the small portion) The necessary dimension V and unit of the size of the part, the wristband speed V is measured in the first nineth and the measured part is pressed, and the wristband wristband is pressed because of the softness of the wristband and the like. Pressurization pressure detection The electric power applied per unit of pressurization is the method of controlling the pressurization speed of the wristband pressure of 200843698 as shown in the above-mentioned control No. 129920. After being pressurized from the start of the measurement to a predetermined pressure, it is moved. To the super-speed pressurization, the average pressurization speed is obtained from the pressure enthalpy and the time difference corresponding to the pressure at 2 o'clock. From the difference between the obtained average pressurization speed and the target pressurization speed, the pump voltage of the pressurizing means is performed. The feedback control is performed, and the output flow rate of the pump is controlled to become the target pressurization speed. [Patent Document 1: JP-A-2006-129920] [Problem to be Solved by the Invention] However, as disclosed in Patent Document 1, Will add The pump voltage of the means is feedback controlled to control the micro-speed pressurization speed so as to become a predetermined target pressurization speed, and the range of the controllable pump voltage is limited by the characteristics of the pump. Therefore, the size of the measurable wristband is determined. (The volume) or the size of the measurement site is limited. Specifically, the output flow rate Q when the pump voltage is operated at the minimum voltage (min) is set as the output flow rate QMIN, and the pump voltage is operated at the maximum voltage (MAX). The output flow rate Q at the time is the output flow rate QMΑΧ, and the relationship between the output flow rate Q and the wristband pressure required when the wristband is pressed at the equal pressurization speed V is shown in Fig. 20. From Fig. 20, The range from the output flow rate QMIN to the output flow rate QMAX is a range of output flow rate Q (referred to as a control range) that can be controlled by the pump voltage in order to pressurize the wristband pressure at a pressurizing speed. The output flow rate Q necessary for pressurizing at a constant pressurization speed is within the control range ,, and the size of the wristband and the size of the measurement portion are the control range 第 shown in FIG. The pump voltage is 200843698, which can control the pressure of the wristband to be pressurized at an equal pressure. However, as shown in Fig. 9, the smaller the size of the wristband and the smaller the size of the measurement part, the wristband is pressed. The smaller the output flow rate Q required for pressurization at an equal pressurization speed, the larger the size of the wristband and the larger the size of the measurement portion, the more the required output flow rate Q. Therefore, in order to perform the constant velocity at the speed V The required output flow rate for pressurization is more than the output flow rate QMAX, and is located in the size of the wristband and the size of the measurement portion above the control range 第 shown in Fig. 20, that is, the size and measurement of the wristband. The size of the portion is larger than the range in which the pump voltage can be controlled, and the pressing speed of the wristband pressure becomes slower than the target pressing speed V. Further, in the case where the required output flow rate is smaller than the output flow rate QM I , and is located below the control range Η shown in Fig. 20, the size of the wristband and the size of the measurement portion, that is, the size of the wristband And the size of the measurement site is smaller than the range in which the pump voltage can be controlled, and the pressurization speed of the wristband pressure becomes faster than the target pressurization speed V. In particular, this problem remarkably occurs in the case where the wristband volume is small and the size of the measurement site is small. In this case, the pressurizing speed of the wristband pressure as described above becomes faster than the target pressurizing speed. Therefore, there is a problem that the pressure pulse information for blood pressure calculation is reduced, and high measurement accuracy may not be obtained. In the case of the diaphragm pump using the wristband pressure method of the electronic sphygmomanometer, the relationship between the output flow rate of the pump and the wristband pressure is that if the wristband is pressed high, the difference between the pressure generated by the volume change of the diaphragm and the wristband pressure is reduced. And the output flow of the pump is reduced. Further, the speed is changed in response to the voltage of the motor that drives the pump, and the flow rate is changed at 200843698. Therefore, in the case where the electronic sphygmomanometer uses a diaphragm pump, 'the motor voltage of the pump is controlled by the relationship between the output flow rate of the pump and the wristband pressure', and the pressurization speed of the wristband pressure is controlled by the feedback control to become the target plus Pressure speed. In this case, when the wristband volume is small and the size of the measurement site is small, in order to press the wristband pressure at a constant speed at a speed V, it is necessary to set the motor voltage of the pump to a minimum voltage (min) or less to further suppress Rotating speed. However, in such a control, the motor drive torque is lowered, and the difference between the motor voltage of the pump and the lock voltage of the motor stop is small, and the pump is stopped, and there is a problem that the blood pressure cannot be measured and the blood pressure cannot be measured. Further, in the following description, the motor voltage of the pump is referred to as a pump voltage. The present invention has been made in view of such a problem, and an object of the present invention is to provide a blood pressure measuring device capable of performing constant velocity pressurization and accurately measuring the size of various measurement sites and the sizes of various wristbands corresponding thereto. Blood pressure, in particular, provides a blood pressure measuring device which can perform constant velocity pressurization and accurately measure blood pressure even when the wristband is small in size and the size of the measurement site is small. [Means for Solving the Problems] In order to achieve the object, according to one aspect of the present invention, a blood pressure measuring device includes: a fluid bag for measurement; a supply unit for supplying a fluid to a fluid bag for measurement; and a discharge unit for measuring The fluid bag discharges the fluid; the sensor 'measures the internal pressure of the fluid bag for measurement; the fixed portion fixes the fluid bag for measurement to the measurement site; and the calculation unit supplies the fluid to the supply portion to be fixed to the measurement In the process of measuring the fluid bag for the site, when the internal pressure of the fluid bag for measurement changes according to the set pressure rate, the blood pressure is calculated based on the internal pressure of the fluid bag for measurement obtained by the sensor of -10-200843698. In the process of supplying the fluid to the measurement fluid bag by the supply unit, the flow rate is discharged from the body bag in response to the change in the internal pressure of the measurement fluid bag. [Effect of the Invention] When the blood pressure measurement device of the present invention is used, When calculating the blood pressure of the blood pressure by calculating the amplitude change of the wristband pressure fluctuation during the pressurization process, the size of each measurement site and the corresponding band size energy can be determined. Correct blood pressure measurement. Blood pressure can be accurately measured especially when the wristband is small in size and small in size. [Embodiment] Hereinafter, the implementation of the present invention will be described with reference to the drawings. In the following description, the same elements and constituent elements are assigned the same names and functions. Referring to Fig. 1, a blood pressure measurement device (hereinafter, the pressure gauge) 1 of the present embodiment mainly includes a main body 2, and a wristband 5 wound around a measurement site, and are connected by an air tube 10. The front operating portion 3 and the display 4 of the main body 2, and the operating portion 3 includes: a switch 3 - for indicating the start/stop of the measurement; and a switch 3 - 2 for indicating and displaying the past data of the recording; Switches 3 - 3, etc., operate the clock. The air bag for measurement 1 3 (see the fifth! on the wristband 5. The wristband 5 is wound around the measurement site and the wrist air bag 13 is pressed against the measurement site. The air bag for measurement 1 3 is described. The measurement air system 20 (see Fig. 3) performs expansion/reduction. [First embodiment] The outlet is in a fixed fluid. The wristband pressure type measures the shape of various wrist portions. Symbol. In the sphygmomanometer 1 of the first embodiment, the sphygmomanometer 1 of the first embodiment is pressed from the beginning of the measurement operation to the end of the sphygmomanometer 1 according to the first embodiment. The action shown. In detail, referring to Fig. 2, when the sphygmomanometer 1 is pressed by the switch 3-1, first, the constant-speed pressurization control is performed, and the internal pressure of the measurement air bladder 13 is pressurized at an equal pressure. Control (step S1), and blood pressure measurement is performed at a predetermined timing (step S2). When the blood pressure is determined, the constant pressure pressurization control of step S1 and the blood pressure measurement of step S2 are repeated, and when it is determined (YES in step S3), a series of operations are completed, and the measurement is completed. Fig. 3 is a block diagram showing a specific example of a functional structure for controlling the increase and decrease of the internal pressure (wrist band pressure) of the air bag 13 for measurement and blood pressure measurement in the sphygmomanometer 1 according to the first embodiment. Referring to Fig. 3, the sphygmomanometer 1 includes the air bag 13 for measurement. The air bag 13 for measurement is connected to the air system 20 for measurement. The measurement air system 20 includes a pressure sensor 23 for measuring an internal pressure of the measurement air bladder 13 and a pump 2 1 for supplying and exhausting the measurement air bladder 13; Control valve 22. Further, the sphygmomanometer 1 includes a CPU (Central Processing Unit) 40 for controlling the entire sphygmomanometer 1, an amplifier 28 connected to the measurement air system 20, a pump drive circuit 26, and a valve drive circuit 27; The D (Analog to Digital) converter 29 is connected to the amplifier 28, the memory unit 41 stores the program or measurement result executed by the CPU 40, the display 4 displays the measurement result, and the like, and the operation unit 3. The CPU 40 executes a predetermined program stored in the memory unit 4 based on the operation signal input from the operation unit 3, and outputs a control signal to the pump drive circuit 26 and the valve drive -12-200843698 circuit 27. The pump drive circuit 26 and the valve drive circuit 27 drive the pump 21 and the control valve 22 based on the control signal, and perform a blood pressure measurement operation. The pressure sensor 23 detects the internal pressure of the measurement air bladder 13 and inputs a detection signal to the amplifier 28. The input pressure signal is amplified to a predetermined amplitude at the amplifier 28, and then input to the C P U 4 0 after the A/D converter 29 is converted into a digital signal. The C P U 4 0 performs a predetermined process based on the internal pressure of the air bag 13 obtained from the pressure sensor 23, and outputs the control signal to the pump drive circuit 26 and the valve drive circuit 27 in response to the result. Further, the CPU 4 calculates the blood pressure 〇 based on the internal pressure of the measurement air bladder 13 obtained from the pressure sensor 23, and outputs it in order to display the measurement result on the display 4. The control valve 22 is a valve that controls the discharge of air in the measurement air bladder 13. The opening and closing of the control valve 22 is controlled by the valve drive circuit 27 in accordance with a control signal from the CPU 40. The configuration of the control valve 22 is not limited to a specific configuration in the present invention. As a specific example, a flow rate control valve disclosed in Japanese Laid-Open Patent Publication No. 3,079,166, or an electric exhaust device described in WO 9 8/3, 4, 3, 3, 8 can be used. More specifically, the flow control valve disclosed in Japanese Patent No. 3,079,166 includes a drive shaft that opens and closes an outlet through a gasket formed of an elastic material. The flow of the fluid is controlled by controlling the drive shaft to smash the gasket at the outflow port or out of the outflow port. The end of the outflow port is a flat surface orthogonal to the direction of movement of the drive shaft. A flat surface of the gasket that is orthogonal to the direction of movement of the surface of the discharge port and the drive shaft is disclosed. As a specific example of the shape of the gasket, the publication shows a cylindrical shape which is chamfered with respect to the surface of the outlet. Because the gasket is in this shape, the drive shaft gradually drives the '-13· 200843698 pad to leave the outflow port, and when the outflow port is opened, the outflow port does not open all at once, but is gradually closed according to the oblique angle of the gasket. The air. In the case where the control valve 22 is a mechanism that uses the flow control valve, the control valve 22 includes a drive shaft that is controlled to be driven by the valve drive circuit 27 and that opens and closes the flow outlet through a gasket formed of an elastic material. The shape of the gasket is, for example, a cylindrical shape that is chamfered with respect to the face of the outflow port. When the valve drive circuit 27 is driven to separate the drive shaft from the outlet of the measurement air bladder 13, the air in the measurement air bladder 13 is gradually discharged in accordance with the oblique angle of the gasket. Further, the control valve 22 is of course not limited to such a shape, and as described above, it is preferable to provide a mechanism for gradually discharging the air in the measurement air bladder 13 by the control of the valve drive circuit 27. Fig. 4 is a view showing the relationship between the control voltage V applied by the valve drive circuit 27 and the exhaust flow rate Q from the control valve 22 in order to control the closing of the control valve 22. Referring to Fig. 4, the higher the control voltage V is, the higher the force at which the drive shaft presses the outlet of the measurement air bladder 13 via the gasket is exceeded, so the exhaust flow rate Q from the control valve 22 is reduced. When the control voltage V is low, the smaller the force at which the drive shaft presses the outlet of the measurement air bladder 13 via the gasket, the more the exhaust flow rate Q from the control valve 22 increases. In addition, in the case where the internal pressure (the wristband pressure) P1 to P3 of the measurement air bladder 13 is increased in this order (P1) <P2 <P3), as shown in Fig. 4, it is found that the higher the wristband pressure P is, the more the exhaust flow rate Q is at a predetermined control voltage V, and the wristband is formed in order to change the exhaust flow rate Q to a predetermined flow rate. The higher the pressure P, the higher the required control voltage v. From the relationship shown in Fig. 4, the relationship between the wristband pressure P and the exhaust flow rate Q from the control valve 22 is derived as shown in Fig. 5. DETAILED DESCRIPTION OF THE INVENTION As described in Fig. 5, the higher the wristband pressure P, the more the exhaust flow rate Q from the control valve 22 increases. Further, in the case where the control voltages V 1 to V3 for controlling the opening and closing of the control valve 22 are increased in this order (VI) <V2 <V3), the higher the control voltage V is, the lower the exhaust flow rate Q from the control valve 22 is at a predetermined wristband pressure P. If the control voltage V is low, the exhaust flow rate Q is large. As will be described later, as shown in the description of Fig. 20, the voltage for controlling the output flow rate Q of the pump 2 (hereinafter referred to as the pump voltage) is set to the minimum voltage (min), and the air bag for measurement 13 is used. The output flow rate Q when the internal pressure (wrist band pressure) is pressurized from P1 to P2 is set as the output flow rate QMIN. The pump voltage is set to the maximum voltage (MAX), and the output flow Q when the wristband pressure is pressurized from P1 to P2 is set to the output flow rate QMAX. The range from the output flow rate QMIN to the output flow rate QMAX is referred to as the "control range" of the pump 21. The control range of the pump 21 is a range of the output flow rate Q of the pump 2 1 which is controllable by a pump voltage which pressurizes the wrist strap at an equal pressurization speed. Further, the output flow rate Q of the pump 2 1 required to pressurize the wrist band pressure at the pressurizing speed V is referred to as the "required pressurizing flow rate" of the wrist band. The necessary pressure flow rate is as described above, and the smaller the size of the wristband and the size of the measurement site, the larger the size of the wristband and the size of the measurement site. In the present embodiment, as shown in Fig. 20, the capacity of the measurement air bladder 13 (the size of the wristband) and the required pressure flow rate at the measurement site are set to be lower than the control range of the pump 21. In the case where the size of the wristband and the size of the measurement site are smaller than the controllable range of the pump voltage such as pressing the wristband at an equal pressurization speed, the pressurization speed of the preset target is equal. The control method for controlling the wristband pressure and pressurization is the control method of the constant velocity pressurization control in the step -15-200843698 s 1. In the following description, the equal pressurization speed of the preset target is referred to as "target speed". [Control Method 1] Fig. 6 is a view for explaining the control method 1 of the constant-speed pressurization control in the step s1. The control method 1 is to set the pump voltage to at least the minimum voltage (min), and the CPU 40 controls the output flow rate Q of the pump 21 and the exhaust flow rate from the control valve 22 in such a manner that the wrist band pressure is pressurized at the target speed. When the wristband is pressed from P1 to P2 at an equal pressurizing speed, the pressurization speed of the wristband is detected in the process of pressurizing the wristband pressure from P0 to P1 (process I). In the case where the measured pressurization speed is faster than the target speed, the process of the control method 1 is executed in this step S1. In detail, part (A) of Fig. 6 shows the relationship between the required pressurized flow rate Q and the wristband pressure P in the control method 1. Referring to part (A) of Fig. 6, in the control method 1, the CPU 40 sets the pump voltage to at least the minimum voltage (miη) in the process of pressurizing the wristband pressure from P0 to P1 (process I) to lower the pump 2 1 output flow Q. In addition, even if the pumping voltage of the pump voltage is set to be faster than the target speed, the pump output voltage is too large, so the pump voltage becomes the necessary pressure flow rate at the wristband. The output flow rate Q is constant, and the CPU 40 performs control for leaking air from the control valve 22. In this control, the necessary pressurized flow rate required for the constant velocity pressurization of the process I wristband is increased to the output flow rate QMIN of the pump 21 at the pump voltage of at least the minimum voltage (miη). Next, in the process of pressurizing the wristband pressure from Ρ1 to Ρ2 (process Π), the CPIH0 surface gradually closes the already-opened control valve 22, and the exhaust gas flow from the control valve 22 is reduced toward the minus-16-200843698. The direction control is performed by pressing the wrist strap with the set pump voltage so that the necessary pressure flow rate of the wrist strap can be consistent with the output flow rate of the pump 2 1 when the pump voltage is set. In this control, the wristband is pressed at an equal pressure rate during the process. Further, in the control method 1, as a method of controlling the flow rate of the exhaust gas from the control valve 22 in the process I, two methods (type 1, type 2) shown in part (B) of Fig. 6 can be employed. Part (B) of Fig. 6 shows the relationship between the exhaust gas flow rate Q from the control valve and the wristband pressure P in the control method 1. Referring to part (B) of Fig. 6, the type 1 pre-opens at least a part of the control valve 22 in the initial state, and reduces the exhaust flow rate from the exhaust flow rate Qa at that time to and at the set pump voltage. The output flow rate Q is the same, and the process I is controlled toward the direction in which the control valve 22 is closed. Type 2 pre-closes the control valve 22 in the initial state, and in order to increase the exhaust flow rate from the exhaust flow rate Q0 at that time to the output flow rate Q of the set pump voltage, the process I is oriented The method of controlling the direction of the control valve 22 is opened. In addition, in the process, the control valve 22 is completely closed, and after that time, the necessary pressurized flow rate of the wristband becomes the control range of the pump 2, that is, after a certain time in the process, in general, only the pump voltage is borrowed. The control can be performed by pressing the wrist strap at a constant pressurizing speed and performing the control shown in the (Α) portion of Fig. 7. The (Α) portion of Fig. 7 shows the relationship between the required pressurizing flow rate Q and the wrist band pressure in the control method 1. The wristband pressure is P a ( ρ 1 <P a The time of <Ρ 2 ) is taken as the output flow rate QM I N of the pump voltage at the minimum voltage (min) of the necessary pressurized flow rate of the wristband. The process from pressing P1 to Pa in the process of pressurizing the wristband from ρ 1 to P2 is set to -17-200843698, E-1, and the process from being pressurized to P2. Set to process π -2. The (Β) portion of Fig. 7 shows the relationship between the exhaust flow rate Q from the control valve and the wrist band pressure in the control method 1. Referring to the (Β) portion of Fig. 7, in the above case, the CPU 40 is controlled to completely close the control valve 22 in the process , 1, and if the necessary pressure flow of the wrist band becomes the output flow rate QM I Ν, the control valve is ended. 2 2 control. In the process Π 2, C P U 4 0 controls the pump voltage so that the output flow rate Q of the pump 2 1 becomes the same as the necessary pressure flow of the wrist band pressure. In this control, the wristband is pressurized at a constant pressurization speed in the process Π-2. Fig. 8 is a flow chart showing the operation of the sphygmomanometer 1 in the case where the constant velocity pressurization control in the step S1 is controlled by the control method 1, and is a flowchart showing the details of the step S1 in Fig. 2. The process shown in the flowchart of Fig. 8 is a process in which the process I controls the flow rate of the exhaust gas from the control valve 22 by the method of the above-described type 2, that is, the control valve 22 is completely closed in the initial state, and The process of the case where the process I is controlled in the direction of opening. The processing shown in the flowchart of Fig. 8 is realized by the CPU 40 reading and executing the program stored in the memory unit 41, and controlling the respective units shown in Fig. 3. Referring to Fig. 8, in the sphygmomanometer 1, when the switch 3-1 is pressed, first, in step S1, the CPU 40 sets the control voltage 控制 of the control valve 22 to completely turn off the voltage 値Υ1 of the control valve 22. Then, in step S13, the CPU 40 sets the pump voltage X to be much lower than the initial voltage 値X1 of the maximum voltage (MAX) (at least about the minimum voltage (nun)). Next, the CPU 40 obtains the pressurizing speed of the wristband pressure based on the sensor signal from the pressure sensor 23, and determines whether the pressurizing speed is consistent with the set target speed of -18·200843698, and whether the pump voltage X reaches the minimum. Voltage (min) (step S15). In step S15, the CPU 40 determines that none of these conditions are satisfied (NO in step S15), that is, the pressurizing speed of the wristband pressure does not coincide with the target speed, and the pump voltage X does not reach the minimum voltage (min). . At this time, when the pressurizing speed of the wristband pressure is faster than the target speed (YES in step S17), the CPU 40 decreases the pumping voltage X by a predetermined value (α1) (step S19), and then performs the step S1. 5 judgment. On the other hand, when the pressurizing speed of the wristband pressure is slower than the target speed (NO in step S17), the CPU 40 increases the pump voltage X by a predetermined 値 (α 1) (step S21), and then performs the step S15. Judge. That is, until the pump voltage X reaches the minimum voltage (miη), or the pressurizing speed of the wristband pressure becomes the same as the target speed, the CPU 40 controls the lowering of the pump 2 when the pressurizing speed of the wristband pressure is faster than the target speed. 1 output flow. In the case where the pressurizing speed of the wristband pressure is slower than the target speed, it is controlled to increase the output flow rate of the pump 2 1. The CPU 40 determines that the processing of steps S15 to S21 is repeated until either of the two conditions is satisfied in step S15. This step S19 is repeated, and in step S15, the CPU 40 determines that the pump voltage X has reached the minimum voltage (min) (YES in step S15). At this time, when the pressurizing speed of the wristband pressure is faster than the target speed (NO in step S23, and YES in step S25), the CPU 40 repeats until the pressurizing speed of the wristband pressure becomes the same as the target speed. The control voltage Y of the control valve 22 is reduced by a predetermined 値 (/3 1) (step S27), that is, the control of the direction in which the control valve 22 is opened. On the other hand, in the case where the pressurizing speed of the wristband pressure is slower than the target speed (NO in step S23, and N〇 in step S25), the pressurizing speed to the target speed is -19-200843698 to the wristband pressure. Until the coincidence, the CPU 40 repeats the process of increasing the control voltage Y of the control valve 22 by a predetermined 値 (/3 1) (step S29), that is, the control of closing the direction of the control valve 22. Further, in the process of repeating the step S29, if it is judged that the control voltage Y of the control valve 22 reaches the voltage 値Y 1 (YES in step S30), that is, when it is detected that the control valve 22 is completely closed, the CPU 40 repeats from step S1 5 Processing. In step S15, if the CPU 40 determines that the pressurizing speed of the wristband pressure coincides with the target speed (YES in step S15, and YES in step S23), the blood pressure measurement in step S2 is started. The CPU 40 repeats the processing of steps S15 to S30 and the blood pressure measurement of step S2 until the blood pressure is determined, and when the blood pressure is determined (YES in step S3), the series of operations is terminated. This measurement is over. Fig. 9 is a flow chart showing the operation of the sphygmomanometer 1 in the case where the constant velocity pressurization control in the step S1 is controlled by the control method 1, and is a flowchart showing the details of the step S1 in Fig. 2. The process shown in the flowchart of Fig. 9 is a process in which the process I controls the flow rate of the exhaust gas from the control valve 22 in the manner of the above-described type 1, that is, the control valve 22 is opened at least in the initial state. And processing in the case where the process I is controlled in the direction of closing. The processing shown in the flowchart of Fig. 9 is also the processing executed at the start of the blood pressure measurement, and the CPU 40 reads the program stored in the memory unit 4 1 and executes it, and controls the parts shown in Fig. 3. And realized. Referring to Fig. 9, when the sphygmomanometer 1 is pressed by the switch 3-1, first, in step S3 1, the CPU 40 sets the control voltage Y of the control valve 22 to open the predetermined voltage 値 Y2 of at least a part of the control valve 22. Thus, at least a portion of the valve 22 of the control -20-200843698 is opened. Then, in step S33, the CPU 40 sets the pump voltage X to be much lower than the initial voltage 値 XI of the maximum voltage (MAX) (at least about the minimum voltage (m i η)). Next, the CPU 40 obtains the pressurizing speed of the wristband pressure based on the sensor signal from the pressure sensor 23 in this state, and determines whether the pressurizing speed coincides with the set target speed and the control voltage of the control valve 22 Whether or not the voltage 値Υ1 that completely closes the control valve 22 is reached (step S35). In step S35, the CPU 40 determines that none of these conditions are satisfied (NO in step S35), that is, the pressurizing speed of the wristband pressure does not coincide with the target speed, and the control voltage Y of the control valve 22 does not reach the control valve. 22 Fully closed voltage 値 Y 1 . At this time, when the pressurizing speed of the wristband pressure is faster than the target speed (YES in step S37), the CPU 40 reduces the control voltage Y of the control valve 22 by a predetermined value (α2) (step S39), and then performs this step. Judgment of S35. On the other hand, when the pressurizing speed of the wristband pressure is slower than the target speed (NO in step S37), the CPU 40 increases the control voltage 控制 of the control valve 22 by a predetermined value α(α 2) (step S41), and then performs the The judgment of step S35. That is, until the control valve 22 is completely closed, or the pressurizing speed of the wristband pressure coincides with the target speed, the CPU 40 controls the opening of the control valve 22 slightly when the pressurizing speed of the wristband pressure is faster than the target speed. Exhaust flow from control valve 22. The case where the pressurizing speed of the wristband pressure is slower than the target speed is controlled to slightly close the control valve 22 to lower the exhaust flow rate from the control valve 22. The CPU 40 determines that the processing of steps S35 to S41 is repeated until either of the two conditions is satisfied in step S35. This step S41 is repeated. At step S35, the CPU 40 judges that the control voltage Y of the control valves 22-21-200843698 reaches the voltage 値Υ1 and the control valve 22 is completely closed (YES in step S35). At this time, when the pressurizing speed of the wristband pressure is faster than the target speed (NO in step S43, and YES in step S45), the CPU 40 repeats until the pressurizing speed of the wristband pressure becomes the same as the target speed. The process of reducing the pump voltage X by a predetermined enthalpy (/3 2) (step S47), that is, the control of reducing the direction of the output flow of the pump 2 1 . On the other hand, when the pressing speed of the wristband pressure is slower than the target speed (N〇 in step S43, and NO in step S45), the pressing speed to the wristband pressure becomes the same as the target speed. The CPU 40 repeats the process of increasing the pump voltage X by a predetermined enthalpy (/3 2) (step S49), that is, controlling the direction of the output flow rate of the pump 21. In step S35, if the CPU 40 determines that the pressing speed of the wristband pressure coincides with the target speed (YES in step S35), or repeats the processing, it is determined in step S43 that the pressing speed of the wristband pressure coincides with the target speed (in In step S43, YES), the blood pressure measurement in step S2 is started. The CPU 40 repeats the processing of steps S35 to S49 and the blood pressure measurement of step S2 until the blood pressure is determined, and when the blood pressure is determined (YES in step S3), the series of operations is terminated. This measurement is over. The CPU 40 of the sphygmomanometer 1 according to the present embodiment executes the constant velocity pressurization control of the above control method 1 in this step S1, and controls the flow rate of the exhaust gas from the control valve 22 because the size of the wristband and the size of the measurement site are small. 'The necessary pressure flow rate of the wristband is smaller than the output flow rate QM IN when the pump voltage is set to the minimum voltage (min). Even if the pump voltage is set to the minimum voltage (mi η ), the wrist strap cannot be pressed. In the case of pressure speed pressurization, the necessary pressure flow rate of the wristband is also adjusted. Therefore, in the sphygmomanometer 1 of the present embodiment, the wristband pressure is pressurized at a pressurizing speed of -22-200843698 or the like. As a result, in the case where the sphygmomanometer wristband of the present embodiment has a small size and the size of the measurement site is small, the wristband is pressed and pressurized at the target pressing speed. [Control Method 2 - 1] Fig. 10 is a view for explaining 2-1 of the constant-speed pressurization control in step S1. The control method 2 - 1 is a method in which the pump voltage is set to the exhaust gas flow rate of the control valve 22 so that the wristband pressure is pressurized to a predetermined degree in accordance with the set pump voltage. When the pressure is pressed from P 1 to P 2 at an equal pressurizing speed, the pressurization speed of the wrist band is detected in the process of pressing the wrist band to Ρ 1 (process I). In the case where the pressing speed is faster than the target speed, the processing of 2 _ 1 is performed at this step S1. In detail, the first diagram shows the relationship between the pressure flow Q and the wristband pressure in the control method 2-1. Referring to Fig. 10, the pump voltage is set to a predetermined voltage 値VS in advance at g - 1. The output flow rate of the pump 21 when the predetermined voltage 値VS is referred to as "basic voltage VS" and the pump electric voltage VS is used as the basic flow rate qS. The process of pressing the pressure from P0 to P1, to the necessary pressurization of the wristband and the basic flow rate QS, the CPU 40 controls the flow of gas from the control g. In this control, it is necessary to pressurize the process I wristband to the basic flow rate QS. That is, in the process I, the CPU 40 performs the control of the air leaking into the wristband, and the flow rate such as the pressurizing speed v can be used as the basic flow rate QS. Then, in the process of pressurizing the wristband pressure from P1 to P2, even if the method can be precisely controlled, the pressurization speed is necessary to increase the control method of the wristband έP 0 pressure measurement. [In the case of the method 2 ί, the pressure system basically puts the wristband flow into the 3 2 2 row and raises the self-control valve speed pressurizing pump' CPU40 -23- 200843698 In order to make the necessary pressure flow of the wristband become basic and The flow rate QS is uniform (synchronized state)' while gradually closing the opened proportional control valve 22, and toward reducing the directional control of the exhaust flow from the control valve 22, while setting the set pump voltage as the basic voltage VS and The wrist strap is pressurized. In this control, the wristband is pressed at an equal pressure rate during the process. Further, in the control method 2 - 1, as a method of controlling the flow rate of the exhaust gas from the control valve 22 in the process I, the two methods (type 1, type 2) described in the section (B) of Fig. 6 can be employed. . In addition, the size of the wristband and the size of the measurement site are the necessary pressure flow rate of the wristband to become the basic flow rate QS or more. When the pressure of the wristband pressure is slower than the target speed, the CPU 40 uses the wristband at the target speed. The pressure is pressurized, and the pump voltage is controlled in a control range from the basic flow rate QS to the output flow rate QMAX in the control range Η from the output flow rate QM IN to the output flow rate QMAX. Fig. 1 is a flow chart showing the operation of the sphygmomanometer 1 in the case where the control of the control method 2-1 is performed by the constant-speed pressurization control in the step S1, and shows the details of the step S1 of Fig. 2; flow chart. The process shown in the flowchart of FIG. 1 is a process in which the process I controls the flow rate of the exhaust gas from the control valve 22 in the manner of the above-described type 2, that is, the control valve 22 is completely closed in the initial state. And in the case where the process I is controlled in the direction of opening. The processing shown in the flowchart of Fig. 1 is also realized by the CPU 40 reading and executing the program stored in the memory unit 41, and controlling the respective units shown in Fig. 3. Referring to Fig. 1, first, in step S61, the CPU 40 sets the control voltage Y of the control valve 22 - 24 - 200843698 to completely turn off the voltage 値Υ 1 of the control valve 2 2 . Then, in step S63, the CPU 40 sets the pump voltage X to the preset basic voltage 値V S . Next, the CPU 40 obtains the pressurizing speed of the wristband pressure based on the sensor signal from the pressure sensor 23, and determines whether or not the pressurizing speed coincides with the set target speed (step S65). In step S65, it is assumed that the CPU 40 determines that the pressurizing speed of the wrist strap pressure does not coincide with the set target speed (NO in step S60). At this time, when the pressurizing speed of the wristband pressure is faster than the target speed (YES in step S67), the CPU 40 repeats the control valve 22 until the pressurizing speed of the wristband pressure coincides with the set target speed. The control voltage Υ is reduced by a predetermined 値 (/3 3) process (step S69), that is, the control of opening the direction of the control valve 22. On the other hand, when the pressurizing speed of the wristband pressure is slower than the target speed (NO in step S67), the CPU 40 repeats the control of the control valve 22 until the pressurizing speed to the wristband pressure becomes the same as the target speed. The voltage Υ is increased by a predetermined 値 (/3 3) process (step S 7 1 ), that is, the control of the direction of the control valve 22 is turned off. In step S65, if the CPU 40 determines that the pressurizing speed of the wristband pressure coincides with the target speed (Y Es in step S65), the blood pressure measurement in the step s2 is started. The constant-speed pressurization control in the step S1 shown in Fig. 1 also repeats the blood pressure measurement in step S3 while the wristband is pressurized at the same speed. The blood pressure measurement operation ends. The CPU 40 of the sphygmomanometer 1 of the present embodiment performs the constant velocity pressurization control of the above control method 2-1 at this step s1, and controls the exhaust flow rate from the control valve-25-200843698 22, and the pump 2 1 The pump with a narrow control range of the pump voltage, and because the size of the wristband and the size of the measurement part are small, the necessary pressure flow ratio of the wristband required for constant speed pressurization at the speed V is set to minimize the pump voltage. The output flow rate QMIN at the time of voltage (min) is smaller, and even if the pump voltage is set to the minimum voltage (mi η ), the wrist strap pressure cannot be pressurized at the equal pressurization speed, and the necessary pressure flow rate of the wrist strap is also adjusted. . Therefore, in the sphygmomanometer 1 of the present embodiment, the wristband pressure can be pressurized at an equal pressure. Even if the size of the wristband and/or the size of the measurement site are different, the wristband can be pressurized at a constant speed by controlling the output flow rate with a pump. The motor used as the pump can be controlled from low speed to high speed. A motor with a speed, and a special motor that is difficult to be affected by load torque even at low speeds. Thus, the price becomes more expensive. However, in the sphygmomanometer 1 of the present embodiment, the range of the rotational speed of the motor may not be wide. Thus, a relatively inexpensive motor can be used. As a result, the price of the sphygmomanometer can be lowered, the pump becomes small and light. In the control method 2-1, as shown in the (Α) part of Fig. 7, after the process Π control valve 22 is completely closed, 'if the necessary pressure flow rate of the wristband becomes the control range Η from the basic flow rate qS to The range of QMAX in the output flow at the maximum voltage (Μαχ) is after the time when the necessary pressure flow of the wristband becomes the range, as shown in the flowchart of Fig. 9, by adjusting the pump voltage and controlling the pump 2 1 The output flow can be used to pressurize the wrist strap at the target speed. [Control Method 2 - 2] Further, as a modification of the control method 2 - 1, the constant velocity pressurization control of the control method 2 - 2 shown in Fig. 2 can be performed in the step s 1 . The figure 2 shows the necessary pressure flow q and the wrist band pressure p in the control method 2 - 2 - -26-200843698. Referring to Fig. 12, in the control method 2-2, the correspondence between the size of the predetermined wristband and the setting of the pump voltage as shown in Fig. 3 is set, and the pump voltage is set to the basic voltage VS according to the size of the wristband. . In the future, as in the control method 2 - 1, the process of pressurizing the wristband pressure from p〇 to p1, the necessary pressure flow to the wristband pressure becomes the basic voltage VS set according to the size of the wristband. The CPU 40 controls the flow rate of the exhaust gas from the control valve 22 until the corresponding basic flow rate QS is reached. The correspondence between the size of the wristband and the setting of the pump voltage as shown in Fig. 1 is, for example, stored in the memory unit 41 in advance in the form of a table. Or other forms of information may be used. In the constant-speed pressurization control of the control method 2-1, the CPU 40 detects the size of the wristband from the pressurization speed detected by the process I, and sets the size corresponding to the wristband by referring to the correspondence shown in FIG. The basic voltage VS. Alternatively, the operation unit 3 may include a size for selecting a wristband such as a wristband size button, and the CPU 40 may be set in accordance with an operation signal from the operation unit 3 according to the user's operation, or may be predetermined in advance. A basic voltage VS is changed in accordance with an operation signal from the operation unit 3 according to the user's operation as described above. Further, in the process I of pressurizing the wristband pressure from P0 to P1, the CPU 40 may determine the size of the wristband by detecting the pressurizing speed when detecting the initial pressurizing speed, and from the prepared plurality of sections. Among the pump voltages, the pump voltage is set in accordance with the determined wristband size. Further, in the wristband 5, a socket (not shown) that fixes the terminal when the wristband 5 is wound around the measurement site is provided, for example, a convex structure as a means for detecting the wristband -27-200843698 inch. . Further, by detecting the size of the wristband by this means, as described above, the CPU 40 sets the pump voltage in accordance with the detected wristband size from among the plurality of pump voltages prepared. The control of the exhaust gas flow rate from the control valve 22 after setting the pump voltage is the same as the control of the control method 2 shown in Fig. 11. The CPU 40 of the sphygmomanometer 1 according to the present embodiment performs the constant velocity pressurization control of the above control method 2-2 in step S1, and sets the pump voltage to be high when the size of the wristband is large and the size of the measurement site is large. The basic voltage is VS 1. When the necessary pressure flow rate of the wristband is lower than the basic flow rate QS1 of the pump 21 when the pump voltage is the basic voltage v S 1 , the flow rate of the exhaust gas from the control valve 22 is controlled so that the necessary pressurized flow rate of the wristband becomes It is consistent with the basic traffic QS 1 . Further, in the case where the size of the wristband and the size of the measurement site are standard, the pump voltage is set to the basic voltage VS2 of the degree. In the case where the necessary pressurized flow rate of the wristband is lower than the basic flow rate QS2 of the pump 21 when the pump voltage is the basic voltage VS2, the exhaust flow rate from the control valve 22 is controlled so that the necessary pressurized flow rate of the wristband becomes Basic flow QS 2 is the same. Further, when the size of the wristband is small and the size of the measurement portion is small, the pump voltage is set to a low basic voltage Vs3. In the case where the necessary pressure flow rate of the wristband is lower than the basic flow rate QS3 of the pump 2 when the pump voltage is the basic voltage VS3, the exhaust flow rate from the control valve 22 is controlled to make the necessary pressure flow of the wristband It becomes the same as the basic flow QS 3. As a result, even if the size of the wristband and the size of the measurement site are various, and the pump basic voltage is set in response to the size thereof, the control range of the control valve of the constant velocity pressurization can be changed to the control method. 2 - 1 has a narrower control range. Therefore, the constant-speed pressurization control is easier than the control method 2-1-200843698, and the pressurization speed accuracy is also improved. [Second Embodiment] Fig. 14 is a block diagram showing a specific example of a functional structure for controlling the increase and decrease of the internal pressure of the measurement air bladder 13 and performing blood pressure measurement in the sphygmomanometer 1 according to the second embodiment. . Referring to FIG. 14 , the sphygmomanometer 1 according to the second embodiment is a control valve 22 of the sphygmomanometer 1 according to the first embodiment shown in FIG. 3 , and the measurement air system 20 includes a rapid exhaust valve 31 and Micro speed exhaust valve 32. The rapid exhaust valve 31 is a valve that controls the discharge of air in the measurement air bladder 13. The opening and closing of the rapid exhaust valve 31 is controlled by the valve drive circuit 27 in accordance with a control signal from the CPU 40. The air in the measurement air bladder 13 is rapidly discharged by the rapid exhaust valve 31 when the blood pressure measurement is completed or the like. Micro speed exhaust valve 32 2 rubber valve, etc. The specific configuration thereof is not limited to a specific configuration in the present invention. Specifically, as the structure of the micro-speed exhaust valve 3 2, the micro-speed exhaust valve described in Japanese Laid-Open Patent Publication No. SHO 61- 27203, or the publication of Japanese Patent Publication No. Hei. A mechanism such as a gas circulation valve. More specifically, the micro-speed exhaust valve described in Japanese Laid-Open Patent Publication No. SHO-61-203-203 discloses an adjustment portion having a hollow structure. A slit for connecting the outside and the middle drive is provided in the adjustment portion. Set the pin through the slit. With this pin, the amount of opening of the slit is varied depending on the exhaust pressure. The figure 15 is a diagram showing the relationship between the exhaust flow rate q of the micro-speed exhaust valve 32 and the wrist pressure P (the internal pressure of the measurement air bladder 13). Refer to Figure 15, Figure 5-1-200843698 The higher the wristband pressure P, the smaller the opening amount of the slit of the micro-speed exhaust valve 32, the less the exhaust flow rate Q, and the lower the wristband pressure P, the lower the micro-exhaust valve 3 2 The larger the opening amount of the slit, the more the exhaust flow rate Q. Fig. 16 is a view showing the relationship between the required pressurized flow rate Q and the wristband pressure P of the sphygmomanometer 1 according to the second embodiment. Further, the solid line in Fig. 6 indicates the necessary pressure flow rate of the wristband required for the constant-speed pressurization at the pressurizing speed V when the micro-speed exhaust valve 32 is not exhausted. The broken line in Fig. 6 indicates the necessary pressure flow amount of the wristband required for the constant-speed pressurization at the pressurizing speed V when the micro-speed exhaust valve 32 is exhausted. As shown in Fig. 15, the measurement air system 20 includes the micro-speed exhaust valve 32, and the flow rate is discharged from the micro-speed exhaust valve 32 in response to the measurement of the wristband pressure in the air bag 13 air. Therefore, when the measurement air system 20 includes the micro-speed exhaust valve 32 (the broken line in Fig. 16), the necessary pressure flow rate of the wrist band and the case where the micro-speed exhaust valve 32 is not exhausted (Fig. 6) The solid line) becomes more than the flow rate from the micro-speed exhaust valve as a whole. In particular, the lower the wrist strap pressure, the more pressure flow necessary for the wrist strap. As shown in Fig. 16, the measurement air system 20 of the sphygmomanometer 1 according to the present embodiment includes a structure of a micro-speed exhaust valve; 32, and is required to increase the pressurization speed V for constant-speed pressurization. The necessary pressure flow of the wristband becomes the control range. Therefore, especially because the size of the wristband and the size of the measurement site are small, the necessary pressure flow rate of the wristband is smaller than the output flow rate QM I 时 when the pump voltage is set to the minimum voltage (miη), even if the pump voltage is set to The minimum voltage (miη) also does not allow the wristband to be pressurized at an equal pressure, or the wristband can be pressurized at an equal pressure. As a result, even if the size of the wristband and the measurement of the size of the portion of the -30-200843698 are small, the sphygmomanometer in which the blood pressure is calculated according to the amplitude change of the wristband pressure during the compression of the wristband can be accurately Blood pressure is measured. Here, in the modification of the structure of the sphygmomanometer 1 according to the second embodiment, as shown in FIG. 7, the micro-speed exhaust valve 32 may not be included in the measurement air system 20, and may be connected to the measurement air bladder 13 Construction. Further, the micro-speed exhaust valve 32 may be connected to only a small wristband (measuring air bladder 13) of a specific size. Specifically, as described above, since the structure of the sphygmomanometer 1 of the second embodiment η ' is particularly suitable for the size of the wristband and the size of the measurement site, the micro-speed exhaust valve 3 2 and the size may be used. The construction of a small wristband connection. Further, as the structure of the detachable micro-speed exhaust valve 32, the micro-speed exhaust valve 32 may be connected in response to the size of the measurement site, specifically, when the wrist circumference is small. It should be considered that the embodiment disclosed herein is exemplified in all matters and is not intended to be limiting. The scope of the present invention is defined by the scope of the claims, and is intended to cover all modifications within the meaning and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a specific example of the appearance of a sphygmomanometer according to an embodiment. Fig. 2 is a flow chart showing the operation of the sphygmomanometer according to the first embodiment. Fig. 3 is a block diagram showing a specific example of the functional configuration of the sphygmomanometer according to the first embodiment. -31 - 200843698 Figure 4 shows the relationship between the control voltage V and the exhaust flow rate Q from the control valve. Figure 5 is a graph showing the relationship between the wristband pressure P and the exhaust flow rate Q from the control valve. Fig. 6 is a view for explaining the control method 1 of the constant velocity pressurization control in step S1. Fig. 7 is a view for explaining the control method 1 of the constant velocity pressurization control in step S1. Fig. 8 is a flow chart showing the operation of the sphygmomanometer in the case where the constant velocity pressurization control method 1 performs the constant velocity pressurization control. Fig. 9 is a flow chart showing the operation of the sphygmomanometer in the case where the constant velocity pressurization control method 1 performs the constant velocity pressurization control. Fig. 10 is a view for explaining the control method 2-1 of the constant-speed pressurization control in the step S1. Fig. 1 is a flow chart showing the operation of the sphygmomanometer in the case where the constant-speed pressurization control of the control method 2-1 is performed by the constant-speed pressurization control. Fig. 12 is a view for explaining the control method 2-3 of the constant velocity pressurization control in the step S1. Fig. 13 is a view showing a specific example of the correspondence between the size of the wristband and the setting of the pump voltage. Fig. 14 is a block diagram showing a specific example of the functional configuration of the sphygmomanometer according to the second embodiment. Fig. 15 is a graph showing the relationship between the exhaust flow rate Q and the wristband pressure P from the micro-speed exhaust valve. -32- 200843698 Fig. 16 is a diagram showing the relationship between the required pressure flow rate and the control range 腕 of the wristband according to the second embodiment. Fig. 17 is a block diagram showing a specific example of the functional configuration of the sphygmomanometer according to the modification of the second embodiment. Fig. 18 is a graph showing the relationship between the wristband compliance Cp and the wristband compression, the wristband compliance Cp, the size of the measurement site (wrist) (wrist circumference), or the size (volume) of the wristband. Fig. 19 is a diagram showing the relationship between the necessary pressure flow rate Q of the wrist band and the wrist band pressure P. Fig. 20 is a diagram showing the relationship between the necessary pressure flow rate Q of the wristband and the control range Η. [Main component symbol description] 1 Blood pressure monitor 2 Main body 3 Operation unit 4 Display 5 Wrist strap 10 Air tube 13 Air bag for measurement 20 Air system for measurement 21 Pump 22 Control valve 23 Pressure sensor 26 Pump drive circuit -33- 200843698
27 閥驅動電路 28 放大器 29 A/D轉換器 3 1 急速排氣閥 32 微速排氣閥 40 CPU 4 1 記憶體部27 Valve drive circuit 28 Amplifier 29 A/D converter 3 1 Rapid exhaust valve 32 Micro speed exhaust valve 40 CPU 4 1 Memory unit