552219 五、 發明說明 ( 1) 發 明 之 領 域 本 發 明 係 關 於一種適用在，裝在各種 車 輛 等 y 受 到 衝 擊 時 可 保 護 乘 客用之氣囊用之充氣器， 車 輛 在 接 受 橫 向 衝 時 可 保 護乘客用之充氣器及其製造方法。 先 刖 技 術 說 明 汽 車 用 之 氣 囊系統用之充氣器中，使 氣 囊 膨 脹 之 手 段 爲 使 用 氣 體 產 生劑、液體燃料或笑氣等 之 液 態 氣 體 者 〇 其 他 在 厂 儲 存之液化氣體充氣器基本原ί 里. J ( 巴 特 • 亞 當 及 莫 罕 德 鲁 拉比，1 999 - 0 1 - 1 068 )之中 5 揭 示 有 做 爲 膨 脹 手 段 用 之 使 用二氧化碳之充氣器。此 種 充 氣 器 中 可 滿 足 使 氣 囊 被 膨 脹之功能，而且基於車輛 本 身 之 輕 量 化 之 觀 點 亦 被 要 求達成小型輕量化之需要。 汽 車 車 輛 之 膨脹式安全系統用充氣器 中 因 應 於 駕 駛 座 助 手 座 等 之車輛內之座位等，而可 達 成 最 適 田 地 保 護 乘 客 ， 而 在 充氣器方面，可使用駕駛 座 之 氣 囊 用 充 氣 器 助 手 座‘ 之 氣囊用充氣器、側面之氣 囊 用 充 氣 器 、 簾 幕 用 之 氣 囊 用 充氣器、膝蓋枕墊器用之 氣 囊 用 充 氣 器 充 氣 器 大 型 安全帶之氣囊用充氣器、管 狀 系 統 之 氣 囊 用 充 氣 器 - 預； 施' 張力益之氣囊用充氣等之各種 ί充 i氣 ，器 〇 這 充 氣 器 中之簾幕用之充氣器，在 車 輛 接 受 橫 向 衝 擊 時 瞬 間 在 車輛之窗側有數公分厚程 度 之 簾 幕 用 氣 曩 會 膨 脹 展 開 〇 此簾幕用氣囊爲在車輛接 受 橫 向 衝 擊 時 或 進 步 車 -fcrr； 輛 橫轉時受到衝擊時用來保 -3- 護 乘 客 爲 的 所 552219 五、 發明說明 ( 2； 用 5 到 氣 囊 膨 脹 爲 止 之 時 間 與 受 到 八 刖 方 或 後 方 之 衝 擊 之 情 形 比 較 時 必 須 較 短 y 再 者 考 慮 橫 轉 時 間 時 必 須 設 定在 數 秒 之 程 度 〇 這 種 簾 幕 用 之 充 氣 器 使 氣 囊 膨 脹 所 須 時 間 可 縮 短 ， 而 且 膨 脹 持 續 時 間 必 須 要 長 y 在 不 使 用 氣 體 產 生 劑 時 僅 採 用 由 加 壓 媒 體 使 氣 囊 膨 脹 之 方 式 〇 利 用 氣 體 產 生 劑 之 燃 燒 氣 體 之 情 況 下 雖 然 可 在 瞬 間 使 氣 囊 膨 脹 但 是 膨 脹 後 在 氣 囊 內 部 變 成 筒 溫 之 故 由 於 與 周 遭 之 溫 度 差 會 使 氣 囊 冷卻 ，而 直接地萎縮< 另 一 方 面 僅 利 用 加 壓 媒 體 之 情 況 下 壓 力 開 放 之 下 加 壓 媒 體 溫 度 降 低 之 故 氣 囊 內 部 之 溫 度 亦 降 低 由 於 與 周 遭 之 溫 度 差 會 使 氣 囊 加 熱 y 使 膨 脹 時 間 會 持 續 數 秒 〇 但 是 僅 由 加 壓 媒 體 而 膨 脹 在 周 遭 溫 度 低 之 時 恐 會 有 膨 腹 時 間 延 後 之 事 J 因 而 製 品 之 可 靠 度 有 改 善 提 高 之 必 要 Ο 再 者 y 爲 了 在 橫 向 之 衝 擊 時 確 實 保 護 乘 客 必 須 在 更 短 時 間 下 使 氣 囊 膨 脹 〇 此 種 簾 幕 用 之 氣 囊 充 氣 器 ) ....... 例 如 可 裝 在 後 部 座 位 之 枕 部 上 由 於 設 置 地 點 之 限 制 最 好 儘 可 能 小 型 化 5 再 者 基 於 車 輛 本 身 之 輕 里 化 之 觀 點 ， 亦 被； 要: 求達成小型輕量化之需要。 上 述 篚 幕 用 之 氣 囊 充 氣 器 y 當 妖 在 各 種 充 氣 器 因 爲 車 輛 本 身 之 輕 量 化 之 要 求 之 下 亦 被 要 求 小 型 輕 量 化 零 件 點 數 之 減 少 或 製 品 成 本 降 低 之 要 求 下 亦 須 達 成 製 造 工 程 簡 單 化 〇 - 4- 552219 五、發明說明（3) 而，在相關之先前技術中，美國專利No . 5 , 527，066說 明書中，使氮氣與氫氣合用，而揭示有使柔性容器膨脹 之裝置，而美國專利Νο·5,782,486說明書中，揭示有使 用被加壓之惰性氣體之氣囊用氣流裝置，而美國專利 No · 3，680,886說明書中揭示有，以氮氣或氨氣使氣囊膨 脹之氣囊裝置，而美國專利No.5, 803, 493說明書中揭示 有，使加壓氣體與氣體產生劑合用之氣囊用側面之充氣 器外殻，日本註冊新型公告No.303 1 246中揭示有，以氬 氣做爲加壓氣體或者使用氮氣之加壓充氣器。 發明之扼耍說明 本發明之課題在提供一種更小型輕量化之充氣器。本 發明爲了解決上述課題，提供一種充氣器，其外殼中充 塡含有二氧化碳之加壓媒體，而且具有使加壓媒體被加 熱用之燃燒裝置，及使燃燒裝置被燃燒用之點火裝置。 本發明中，加壓媒體單獨爲二氧化碳亦可，二氧化碳 與其涖氣體倂用亦可。加壓媒體爲二氧化碳與其他氣體 倂用之情況時，加壓媒體中二氧化碳之含有量在20摩爾 %以上，最好在50摩爾％以上，更較佳爲80摩爾％以上。 其他氣體方面，可使用氯氣、氬氣、氖氣等惰性氣體 或氮氣、一氧化二氮（笑氣）等。再者，加壓媒體中考慮 到燃燒手段之燃燒效率時，含有氧氣亦可。雖然氧氣之 量因應於燃燒手段之種類而決定，但是在加壓媒體最好 在1摩爾％以上，最多在2 5摩爾％以下時較佳。而且，加 552219 五、發明說明（4) 壓媒體中含有1〜10摩爾％程度之氨氣時，在漏氣檢查時 非常有效。 加壓媒體之充塡壓力最好在4MPa以上較佳，其上限値 視加壓媒體之組成而不同’最大可爲200MPa。 二氧化碳之充塡密度，在90%之液化二氧化碳被充塡之 時爲23，400摩爾/立方公尺、氬氣之情況在充塡壓力爲 30MPa時，充塡密度爲12，000摩爾/立方公尺、氨氣之 情況在充塡壓力爲50MPa時，充塡密度爲16，400摩爾/ 立方公尺、二氧化碳被充塡之時，與氬氣在充塡壓力爲 30MPa時被充塡比較，其體積僅爲約51%，與氦氣在充塡 壓力爲50MPa時被充塡比較，其體積僅爲約70%。因此， 充氣器外殻之長度或者直徑做成較短，則充塡壓力可提 高，因而全體可被做成小型輕量化。 本發明所用之燃燒手段，不僅做爲由燃燒氣體而使氣 囊膨脹爲目的而已，亦可使加壓媒體被加熱而促進氣囊 膨脹之作用。因此，此燃燒手段若只爲前述作用時並無 特定限制，苦使用硝酸鹽爲主之火藥（硼硝石）、過鹽素 酸鹽爲主之火藥、無煙火藥等。 本發明之充氣器全體可被做成小型輕量化，而且不會 受到周圍溫度之影響，可瞬時且確實地使氣囊被膨脹起 來。 其次，本發明之課題在提供一種充氣器，可使作動性 能提高，不會受到周圍溫度之影響，到達最大壓力爲止 552219 五、發明說明（7) 要件（c )中被設定成爲A! / A 2 S 1之時，作動時之加壓媒 體的放出壓力被控制在適當壓力。在此，A A 2在1以上 之時’僅由A2而決定膨脹速度之故，膨脹速度無法容易 地調整’膨脹速度不要進行調整時，A!/A2在1以上亦可 。要件（㈧中^/八2<1較佳，八"人2$0.95更好， 0.85最佳。A!/A2之下限値可設定爲0.015。而，A2在儘 可能地大時，加壓媒體之放出較順利，故較佳。最大爲 與充氣器外殼之寬度方向的剖面積同樣程度較佳。 而且’本發明中做爲其他課題之解決手段，在提供一 種充氣器，用來充塡加壓媒體，具有：在一端側上具開 口部之充氣器外殻，及擴散器，它被固定在充氣器外殼 之開口部側，且具有在作動時使開口部流出之加壓媒體 被放出到外部用之氣體排出口，充氣器外殼之開口部與 擴散器之間之加壓媒體的流出經路以破裂板閉塞住，而 且具有該破裂板之破壞裝置，其特徵爲：該氣體排出口 被開放，擴散器內爲恆定壓力。 在本發明中，具備有從上述之要件（a)、（b)、（c)中之 1個、兩個或3個要件較佳。 上述各發明中，該破裂板之破壞裝置被設置在擴散器 部上，除此之外，破裂板、破壞裝置及擴散器部被配置 在充氣器外殼之長度方向兩端附近。 上述各發明中，該擴散器部具有過濾器，加壓媒體通 過過濾器，而從氣體排出口排放到外部。 552219 五、發明說明（8) 充氣器並未有氣體產生劑之燃燒，故沒有產生高溫之 燃燒氣體之事，使用含有點火藥之點火器做爲破裂板之 破壞裝置之時，如上述具有過濾器時，可防止燃燒殘留 等從氣體排出口放出到外部，而且亦可防止破裂板之碎 片從氣體排出口放出到外部。 上述各發明中，該充氣器外殼爲可使用管子，其一端 側閉塞，另一端側連接到擴散器部。 這種充氣器外殻以一支管子製造之故，與一枚板材進 行加工者比較，沒有沿著長度方向之接頭之故，其耐壓 性、耐久性可提高。 上述各發明中，該破裂板被安裝在該充氣器外殼之開 口部側，或者擴散器部側。 本發明之充氣器，不會受到周圍溫度之影響，使氣囊 在瞬間可確實地膨脹。而且到達最大壓力爲止所須時間 短’而且最大壓力維持之時間長。再者，加壓媒體之放 出速度可被調整。 而且，本發明之課題在提供一種充氣器及其製造方法 ’不僅製品之耐壓性、耐久性可提高，而且小型輕量化 亦可達成。 本發明之充氣器雖然可適用於對付側面衝突時用之簾 幕用之氣囊充氣器及側面充氣器之任何一種，在下列說 明中以適用簾幕用之氣囊充氣器爲基本而說明。 本發明中做爲上述課題之解決手段，在提供一種充氣 -10- 552219 五、發明說明（9) 器’用來充塡加壓媒體，具有：在一端側上具開口部 充氣器外殼，及擴散器，它被固定在充氣器外殼之開 部側’且具有在作動時使開口部流出之加壓媒體被放 到外部用之氣體排出口，充氣器外殼之開口部與擴散 之間之加壓媒體的流出經路以破裂板閉塞住，而且具 該破裂板之破壞裝置，其特徵爲：該充氣器外殼爲管 之一端側閉塞，另一端側連接到擴散器部。 這種充氣器外殼以一支管子製造之故，與一枚板材 行加工者比較，沒有沿著長度方向之接頭之故，其耐 性、耐久性可提高。 充氣器外殼之製造上，所使用之管子沿長度方向全 上爲均一之直徑較佳。而且，充氣器外殻最好使管子 脹管或旋轉（s p 1 nn 1 ng )加工法所成形者較佳。加壓媒 爲從該充氣器外殼之閉塞端所充塡者較佳。 上述各發明中，該破裂板被安裝在該充氣器外殼之 口部側，或者擴散器部側。 而且，本發明爲上述充氣器之製造法，其中管子之 端側閉塞之時，預先殘留有細孔，從該細孔充塡加E 體之後，使該細孔被閉塞。 若使用一枚板材之情況，在充氣器外殻之製造時’ 要板材之折曲工程、接頭之溶接工程及開口部之閉塞 程，使用一支管子之情況時，僅須要開口部之閉塞工 ，可使製造工程簡單化，製造成本亦可降低。而且’ 之 □ 出 器 有 子 進 壓 長 以 體 開 媒 須 工 程 溶 -11- 552219 五、發明說明（1〇) 接處亦可減少，因而溶接不良引起之加壓媒體洩露亦可 減少。 上述製造法中，適合於以脹管或旋轉加工之管子被進 行加工，在細孔上嵌入密封銷，充塡加壓媒體之後，使 密封銷之部份被熔接而閉塞較佳。 上述製造法中，適合於以脹管或旋轉加工之管子被進 行加工，在細孔上嵌入密封銷，充塡加壓媒體之後，使 密封銷之部份被熔接而閉塞較佳。 而「脹管加工法」是鍛造之一種，是使原料沿其長度 方向及直角方向被壓縮成形之方法。「旋轉加工法」亦 ~可稱爲是深抽加工法，是使金屬板或以此初步成型之半 成品被高速轉動，而以治具或成型輥子裝著壓入，而使 圓形剖面之中空品被成型之方法。 本發明之充氣器不僅不會降低充氣器所須之耐壓性、 耐久性，而且小型輕量化亦可達成。再者，適用本發明 之製造法時，可使製造工程被簡單化，並且使製造成本 降低。 本發明之充氣器，可使用駕駛座之氣囊用充氣器、助 手座之氣囊用充氣器、側面之氣囊用充氣器、簾幕用之 氣囊用充氣器、膝蓋枕墊器用之氣囊用充氣器、充氣器 blu安全帶之氣囊用充氣器、管狀系統之氣囊用充氣器、 預施張力器之氣囊用充氣等之各種充氣器。 本發明之充氣器亦可使用在簾幕用之氣囊充氣器或其 -12- 552219 五、發明說明（11) 他方面。簾幕用之氣囊充氣器被安裝在成簾幕形狀展開 之氣囊上。車輛轉彎時，防止乘客從車窗跑出很有效用 ’可形成簾幕狀之壁，其他其他在側面衝突時可保護乘 客用之氣囊亦被安裝。 附圖之簡單說明 第1圖爲本發明之充氣器之長度方向的剖面圖； 第2圖爲顯示在第1實施形態、第3比較例中進行之 60L槽內壓力試驗中，壓力之經時變化圖； 第3圖爲本發明之充氣器之長度方向的剖面圖； 第4圖爲顯示第3、4實施形態、第5、6比較例中進 行之60L槽內壓力試驗中，壓力之經時變化圖； 第5圖是顯示第5，6實施形態、第7比較例中進行之 60L槽內壓力試驗中，壓力之經時變化圖； 第6圖是脹管加工之說明用； 第7圖是旋轉加工之說明用圖。 本發明較佳實施形態之詳細說明 發明之實施形態（1 ) 下列將以本發明一個較佳實施形態，參照其附圖而說 明之。第1圖爲本發明之充氣器110之長度方向的剖面 圖。 充氣器外殼11 2爲筒狀之耐壓性容器，內部空間11 3 中具有在充塡壓力爲4MPa以上進行充塡二氧化碳（液體） 之加壓媒體。此二氧化碳從設置在充氣器外殼1 1 2之側 -13- 552219 五、發明說明（12) 面的細孔充塡，該細孔依照圖中之1 40的方式，由熔接 而閉塞。 充氣器外殼1 1 2之一端側上設置有’與充氣器外殼Π 2 形成一體，而在內部空間Π 3內突出之燃燒室外殼1 1 5 ’ 燃燒室外殼1 1 5內，設置有以燃燒手段Π 7所充塡之燃 燒室1 1 6。此燃燒手段1 1 7可由燃燒氣體而將加壓媒體加 熱的話，其種類及量沒有特別限定，例如可使用硼硝石 之類的火藥數克之程度，其他亦可使用液體燃料、氣體 燃料、液體燃料或氣體燃料及氧化劑之組合。 從燃燒室1 1 6到內部空間1 1 3之燃燒通路1 1 9中，設 置有第1破裂板120,燃燒通路119在中途被完全遮斷之 故，燃燒室1 1 6被保持在常壓環境。 設置有與燃燒室1 1 6接觸，而做爲點火手段用之點火 器122，點火器122被鉚接到充氣器外殼112之端部123 而固定。此點火器122使充氣器外殼112之一端被閉塞 〇 充氣器外殻1 1 2之另一端上，設置有擴散器部1 3 〇，擴 散器部1 30之側面部上具有，作動時使加壓媒體及燃燒 氣體之混合氣體（以下稱爲混合氣體）放出到外部所須之 氣體排出口 1 3 1，及使氣體排出口丨3 1從內側被覆蓋所設 置之金屬網製成的過濾器1 3 2。因而，混合氣體必須通過 過濾器1 3 2而從氣體排出口 1 3 1放出到外部。 從擴散器部1 3 0到內部空間1 1 3之混合氣體通路1 3 5 -14- 552219 五、發明說明（13) 上設置有第2破裂板1 3 6 ’混合氣體通路1 3 5被完全遮斷 之故，擴散器部1 3 0亦被保持在常壓環境。 混合氣體流入室1 3 8被設置在第2破裂板1 3 6與內部 空間11 3之間，與充氣器外殻1 1 2 —體成形，在內部空 間Π 3上突出，混合氣體流入室1 3 8之側面上設置有須 要數量之連通孔1 3 9。 其次’將說明充氣器1 1 0之動作。被裝在車輛上時， 充氣器1 1 0被設置成，由衝擊感測器及控制單元所形成 之作動信號輸出手段，及在盒子內將充氣器110及氣囊 收容用之模組等組合成之系統。然後，車輛受到衝擊時 ’接受該系統之衝擊感測器產生之信號，使點火器1 22 作動，使燃燒手段1 1 7著火燃燒，所產生之高溫燃燒氣 體使第1破裂板120被破壞。 然後，高溫燃燒氣體流入內部空間1 1 3，加壓媒體（二 氧化碳）被加熱膨脹，而使內壓提高之故，混合氣體從連 通孔1 3 9流入混合氣體流入室1 3 8中，而使內壓提高， 因而使第2破裂板1 36被破壞。然後混合氣體經由混合 氣體通路135、混合氣體過濾器132，而從氣體排出口 1 3 1排出，使氣囊膨脹。 ^ 發明之實施形態（2 ) 下列將以本發明一個較佳實施形態，參照其附圖而說 明之。第3圖爲本發明之充氣器之長度方向的剖面圖。 首先，說明實施形態（2 ) - 1。充氣器外殼1 2之一端側 -15- 552219 五、發明說明（16) ’使氣囊在數秒間之程度可保持膨脹。 其次，將說明實施形態（2 ) - 2。實施形態（2 ) - 2實施形 態（2 ) - 1之簾幕用之充氣器1 〇的構成幾乎都相同，僅說 明其差異之處。 充氣器外殻12之內部空間16中，以充塡壓力 40 , OOOkPa以上之壓力下充塡有惰性氣體構成之加壓媒體 ’上限値可達到200，OOOkPa。然後，爲了提高充塡壓力 ’此實施形態中，與加壓媒體在35，OOOkPa之情況比較 ’其充氣器外殼在同一直徑下，長度較短僅爲7 0 %。 第2實施形態之簾幕用之充氣器1 〇與第1實施形態者 有同樣之動作。 而，本發明之充氣器適用到側面充氣器之情況下，氣 體排出口 22之部份直接，或經由適當的連接器而連到氣 囊。 發明之實施形態（3 ) 下列將以圖面說明本發明一個-較佳實施形態。第3圖 爲本發明之簾幕用之充氣器10之長度方向的剖面圖。 充氣器外殼1 2之一端側有開口部1 4，另一端側被閉塞 ，內部空間16中充塡有，在35，OOOkPa最大壓力下僅 由惰性氣體形成的加壓媒體。充氣器外殼1 2在寬度方向 之剖面爲圓形，開口部1 4亦爲圓形。 充氣器外殼1 2由脹管加工法或旋轉加工法，而使一端 側上變成加壓媒體之充塡孔的細孔在殘留狀態可完全被 -18- 552219 五、發明說明（18) 在400米/秒以上之時，沒有特別之限定的話’從安全性 觀點看，較佳爲從氨（9 7 0米/秒）、氖（4 3 5米/秒）、氬 (3 1 9米/秒）、氮氣（3 3 7米/秒）等之惰性氣體中選擇一種 或2種一以上之混合物較佳’雖然最好爲氦及/或氖’除 此之外例如，在氨氣中加入氮氣及/或二氧化碳組成之混 合氣體亦可。而，加壓媒體在20°C時之充塡壓力最大可 到35 , OOOkPa之程度。 習知之充氣器之情況爲，雖然加壓媒體之充塡壓力最 大可到3 5,000kPa之程度，長度方向之尺寸縮短，可使 充塡壓力提高到40,000kPa以上之程度，而達成充氣器 外殼部份之輕量小型化。加壓媒體之充塡壓力最好在 50,000kPa以上之程度。 要件（c)中被設定成爲1之時，作動時之加壓媒 體的放出壓力被控制在適當壓力。在此，八1/八2在1以上 之時，僅由A 2而決定膨脹速度之故，膨脹速度無法容易 地調整，膨脹速度不要進行調整時，A"A2在1以上亦可 。要件（0中 A"A2<1 較佳，更好， 0 · 85最佳。Ai / A2之下限値可設定爲0 · 〇1 5。而，A2在儘 可能地大時，加壓媒體之放出較順利，故較佳。最大爲 與充氣器外殼之寬度方向的剖面積同樣程度較佳。 下列，雖然將以實施例更詳細說明本發明，但是本發 明不被這些實施例所限制。 -20- 552219 五、發明說明（19) 實施例1 依照第1圖製造充氣器，以二氧化碳做爲加壓媒體， 在充塡壓力爲6MPa(充塡密度爲23,400摩爾/立方公尺； 3 8克）下進行充塡。燃燒手段使用硼硝石4 · 5克。此充氣 器最大徑爲30公厘，長度爲150公厘，總重量爲300克 。使用此充氣器進行6 0 L槽試驗，測定其壓力曲線，結 果如第2圖所示。 比較例1 以氬氣替代二氧化碳，充塡壓力爲3 OMPa(充塡密度爲 12，000摩爾/立方公尺；41克），而製成與實施例1相同 之充氣器。此充氣器最大徑爲30公厘，長度爲250公厘 ，總重量爲4 0 0克。 比較例2 以氦氣替代二氧化碳，充塡壓力爲5 OMPa(充塡密度爲 1 6,400摩爾/立方公尺；4.1克），而製成不含燃燒手段 之充氣器。此充氣器最大徑爲30公厘，長度爲200公厘 ，總重量爲2 8 0克。 比較例3 以二氧化碳做爲加壓媒體，而製成不含燃燒手段之充 氣器。充塡壓力爲6MPa(充塡密度爲23, 40 0摩爾/立方公 尺；45克）。此充氣器最大徑爲30公厘，長度爲140公 厘，總重量爲280克。使用此充氣器進行60L槽試驗， 測定其壓力曲線，結果如第2圖所不。 -21 - 552219 五、發明說明（21) 加壓媒體 實施例3氦氣100% 實施例4氦氣1〇〇％ 比較例5氬氣96%，其餘爲氨 比較例6氬氣96%，其餘爲氦 充塡壓力（kPa) 50,000 32,000 50,000 32,000 第4圖中明顯地，實施例3、實施例4與比較例5、6 比較時，其最大壓力到達時間變成比較短。 實施例5、6、比較例7 使用第3圖顯示之充氣器，使用八"八2依照下列方式調 整後者，任何一個均以充塡壓力爲50,OOOkPa充塡氦氣 。使用這些充氣器，在溫度23°C使用60L槽進行內壓力 試驗。所獲得之壓力曲線的經時變化如第5圖所示。 實施例5 A!/A2= 33平方公厘/ 33平方公厘=1.0 實施例6 A!/A2 = 15.7平方公厘/33平方公厘=0.47 比較例7 A!/A2 = 63.5平方公厘/33平方公厘=1 .9 第5圖中明顯地，實施例5、6由A,之面積變化，使 A"A2被調整到1以下，可使加壓媒體之放出速度可被變 化，另一方面，比較例5之A"A2超過1之故，即使Ai 之面積大的變化時亦不受其拘束，加壓媒體之放出速度 可上升。 實施例7 製造第3圖所示之簾幕用之充氣器1〇,充氣器外殻12 以下列之管子進行脹管加工而製造之。 -23- 552219 五、發明說明（22 ) 管材：碳素鋼管 ^ 管長：約1 5 0公厘 管外徑：約3 0公厘 管厚：2公厘 脹管加工之細節，如第6圖所示。首先如第6 ( a )圖所 示，使管子嵌入下治具中固定，其次如第6(b)圖所示， 以上治具進行脹管加工，如第6 ( C )圖所示，可獲得細孔 在殘留狀態幾乎被閉塞之充氣器。 如此獲得之充氣器外殼12上，與擴散器部20熔接而 接合之後，配置金屬網製成之過濾器24，嵌入點火器26 ，再與連接器32進行連接，而製成充氣器10。 在此充氣器外殼12內部充塡氨氣，使內部壓力變成 62kPa。而設定成 A"A2 二0.20。 實施例8 除了管子以旋轉加工以外，其他與實施例7相同，而 製成充氣器1 〇。旋轉加工之細節如第7圖所顯示。 如第7 ( a )圖所示，管子固定在框架上之後，沿箭頭方 向轉動，如第7 ( b )圖所示之治具壓住之後進行旋轉加工 ，如第7 ( c )圖所示，獲得細孔在殘留狀態幾乎被閉塞之 充氣器外殻1 2。 符號說明 1 10 充氣器 1 12 充氣器外殼 -24- 552219 五、發明說明（23) 113 內部空間 115 燃燒室外殼 116 燃燒室 117 燃燒手段 119 燃燒通路 120 第1破裂板 122 點火器 123 端部 130 擴散器板 13 1 氣體排出口 132 過濾器 135 混合氣體通路 136 第2破裂板 138 混合氣體流入室 139 連通孔 10 充氣器 12 充氣器外殼 14 開口部 19 破裂板 20 擴散器板 22 氣體排出口 26 點火器 29 端部 30 導電性銷 31 〇環 32 連接器 -25-552219 V. Description of the invention (1) Field of the invention The present invention relates to an inflator for airbags, which can be used to protect passengers when they are impacted, and can be used to protect passengers when they are impacted laterally. Aerator and manufacturing method thereof. In the inflator used in the airbag system for automobiles, the means for inflating the airbag is a liquid gas such as a gas generating agent, liquid fuel, or laughter. Other liquefied gas inflators stored in the factory are basically the same. J (Bart Adam and Mohandrullabi, 1 999-0 1-1 068) 5 reveals the use of carbon dioxide inflators as a means of expansion. This kind of inflator can fulfill the function of inflating the airbag, and the viewpoint based on the weight reduction of the vehicle itself is also required to achieve the needs of small size and weight reduction. The inflators for inflatable safety systems of automobiles and vehicles can be used to protect the passengers in the most suitable fields due to the seats in vehicles such as the driver's assistant seat. For the inflator, the inflator assistant seat for the airbag of the driver's seat can be used. '' Airbag inflators, side airbag inflators, curtain airbag inflators, knee pillow cushion inflators, airbag inflators for large seat belts, airbag inflators for tubular systems -Pre-loading of various air-filled airbags, such as airbags used by Zhangliyi, the inflators for curtains in this inflator have a thickness of several centimeters on the window side of the vehicle when the vehicle receives a lateral impact. The curtain airbag will expand and expand. This curtain airbag is used to protect the passenger when the vehicle receives a lateral impact or to advance the car-fcrr. 535219 5. Description of the invention (2; with 5 The time until the airbag is inflated must be shorter when compared with the case where it is impacted by eight squares or rear. Furthermore, when considering the traverse time, it must be set to a few seconds. The time required for this curtain inflator to inflate the airbag. It can be shortened, and the duration of inflation must be long. When the gas generator is not used, only the method of inflating the airbag with a pressurized medium is used. In the case of using the combustion gas of the gas generator, the airbag can be inflated in an instant, but after inflation The temperature of the inside of the airbag will be reduced due to the temperature difference with the surrounding area, which will directly shrink the airbag. On the other hand, the temperature of the pressurized medium will decrease when the pressure is released when the pressure medium is used only. The temperature also decreases. The temperature difference from the surrounding area will cause the airbag to heat up and expand. Time will last for a few seconds. However, it will only swell when the ambient temperature is low. It may cause the bloating time to be delayed. Therefore, it is necessary to improve the reliability of the product. To protect passengers, the airbag must be inflated in a shorter period of time. This airbag inflator is used for curtains.... For example, it can be installed on the pillow of the rear seat. It is best to be as small as possible due to the restriction of the installation location. The 5th is based on the lightness and lightness of the vehicle itself. It is also required to: achieve the needs of small size and light weight. The above-mentioned airbag inflator for curtain curtains must also achieve the simplification of the manufacturing process when the demon is required to reduce the number of small and lightweight parts or the cost of products under the requirements of various inflators due to the lightweight of the vehicle itself. 〇- 4-552219 V. Description of the invention (3) In the related prior art, US Pat. No. 5,527,066 describes the combination of nitrogen and hydrogen, and discloses a device for expanding a flexible container, and In US Pat. No. 5,782,486, a gas flow device for an airbag using a pressurized inert gas is disclosed, while in US Pat. No. 3,680,886, an airbag device that inflates an airbag with nitrogen or ammonia is disclosed. Patent No. 5,803,493 discloses that an inflator housing for a side surface of an airbag using a pressurized gas and a gas generating agent is disclosed in Japanese Registered New Publication No. 303 1 246, which uses argon as the Pressurized gas or pressurized inflator using nitrogen. Description of the invention The object of the present invention is to provide a smaller and lighter inflator. In order to solve the above-mentioned problems, an inflator is provided in which a casing is filled with a pressurized medium containing carbon dioxide, and further includes a combustion device for heating the pressurized medium, and an ignition device for burning the combustion device. In the present invention, the pressurized medium may be carbon dioxide alone, or carbon dioxide may be used in combination with the gas. When the pressurized medium is carbon dioxide and other gases, the content of carbon dioxide in the pressurized medium is 20 mol% or more, preferably 50 mol% or more, and more preferably 80 mol% or more. For other gases, inert gases such as chlorine, argon, neon, or nitrogen, nitrous oxide (laughing gas) can be used. When the combustion efficiency of the combustion means is considered in the pressurized medium, oxygen may be contained. Although the amount of oxygen depends on the type of combustion means, it is more preferable that the pressure medium is 1 mol% or more, and at most 25 mol% or less. Moreover, adding 552219 V. Description of the invention (4) When the pressurized medium contains ammonia in an amount of about 1 to 10 mol%, it is very effective in leak detection. The filling pressure of the pressurized medium is preferably 4 MPa or more, and the upper limit thereof depends on the composition of the pressurized medium. The maximum may be 200 MPa. The filling density of carbon dioxide is 23,400 moles per cubic meter when 90% of the liquefied carbon dioxide is being filled. In the case of argon, the filling density is 12,000 moles per cubic meter when the filling pressure is 30 MPa. When the filling pressure is 50 MPa, the filling density is 16,400 moles per cubic meter, and when carbon dioxide is filled, compared with argon when the filling pressure is 30 MPa, Its volume is only about 51%. Compared with helium gas which is charged at a pressure of 50MPa, its volume is only about 70%. Therefore, if the length or diameter of the inflator casing is made shorter, the charging pressure can be increased, and the whole can be made smaller and lighter. The combustion means used in the present invention is not only used for the purpose of inflating the airbag by burning gas, but also can make the pressurized medium be heated to promote the inflation of the airbag. Therefore, there is no specific limitation for this combustion method if it is only for the aforementioned effects, bitter use of nitrate-based gunpowder (boronite), perhalinate-based gunpowder, smokeless gunpowder, etc. The entire inflator of the present invention can be made compact and lightweight without being affected by the surrounding temperature, and the airbag can be inflated instantaneously and reliably. Secondly, the subject of the present invention is to provide an inflator, which can improve the operating performance without being affected by the ambient temperature, and reaches the maximum pressure 552219. V. Description of the invention (7) Condition (c) is set to A! / A At 2 S 1, the release pressure of the pressurized medium during operation is controlled to an appropriate pressure. Here, when A A 2 is 1 or more, 'the expansion speed is determined only by A2, and the expansion speed cannot be easily adjusted.' When the expansion speed is not to be adjusted, A! / A2 may be 1 or more. Requirements (㈧ 中 ^ / 八 2 < 1 is better, eight " person 2 $ 0.95 is better, 0.85 is the best. The lower limit of A! / A2 can be set to 0.015. When A2 is as large as possible, pressurize The release of the media is smooth, so it is better. The maximum is the same as the cross-sectional area in the width direction of the shell of the inflator. Moreover, as a solution to other problems in the present invention, an inflator is provided for charging. The pressurized medium includes an inflator housing having an opening portion on one end side, and a diffuser, which is fixed to the opening portion side of the inflator housing and has the pressurized medium that causes the opening portion to flow out when actuated. To the external gas discharge port, the outflow path of the pressurized medium between the opening of the inflator shell and the diffuser is blocked by a rupture plate, and the rupture plate has a destruction device, which is characterized in that the gas discharge port It is opened and the pressure inside the diffuser is constant. In the present invention, it is preferable to have one, two, or three of the above-mentioned requirements (a), (b), and (c). , The breaking device of the rupture plate is arranged in the diffuser In addition to the above, the rupture plate, the destruction device, and the diffuser portion are arranged near both ends in the longitudinal direction of the inflator housing. In each of the above inventions, the diffuser portion has a filter, and the pressurized medium passes through the filter, and Discharged from the gas outlet to the outside. 552219 V. Description of the invention (8) The inflator does not burn with gas generating agent, so no high temperature combustion gas is generated. Use an igniter containing an igniting agent as the rupture plate. At the time of installation, if a filter is provided as described above, it is possible to prevent combustion residues and the like from being released from the gas discharge port to the outside, and also to prevent fragments of the rupture plate from being discharged from the gas discharge port to the outside. In the above inventions, the inflator housing is It is possible to use a tube with one end side closed and the other end side connected to the diffuser. This inflator housing is made of a tube, and compared with a sheet metal processor, there is no connection along the length direction. The pressure resistance and durability can be improved. In each of the above-mentioned inventions, the rupture plate is mounted on the opening portion side or the diffuser portion side of the inflator housing. The inflator of the present invention is not affected by the ambient temperature, so that the airbag can be reliably inflated instantly. Moreover, the time required to reach the maximum pressure is short, and the maximum pressure is maintained for a long time. Furthermore, the release speed of the pressurized medium It can be adjusted. Moreover, the subject of the present invention is to provide an inflator and a method for manufacturing the same. 'Not only can the pressure resistance and durability of the product be improved, but also the size and weight can be achieved. Although the inflator of the present invention can be applied to deal with Either an airbag inflator for a curtain used in a side collision or a side inflator will be described in the following description based on an airbag inflator suitable for a curtain. In the present invention, as a means for solving the above-mentioned problems, Provide an inflatable -10- 552219 5. Description of the invention (9) The device is used for filling pressurized medium, and has: an inflator housing with an opening on one end side, and a diffuser, which is fixed on the inflator housing. The side of the inflator is provided with a pressurized medium that causes the opening to flow out during operation. The pressurized medium out through the rupturable plate closing passage to live, and a destructive means of the rupture disk, wherein: said inflator housing to the side of the closed end of the tube, the other end is connected to the diffuser portion. This inflator casing is manufactured from a single tube, and compared with a sheet metal processor, there is no joint along the length, and its durability and durability can be improved. In the manufacture of the inflator shell, it is preferred that the tubes used have a uniform diameter throughout the length. In addition, the inflator shell is preferably formed by tube expansion or rotary (s p 1 nn 1 ng) processing. The pressurized medium is preferably filled from the closed end of the inflator housing. In each of the above inventions, the rupture plate is mounted on the mouth portion side or the diffuser portion side of the inflator housing. Further, the present invention is the method for manufacturing the inflator described above, wherein when the end side of the tube is closed, pores remain beforehand, and the E body is filled with the pores, and then the pores are closed. In the case of using a single plate, during the manufacture of the inflator shell, the bending process of the plate, the joint welding process and the closing process of the opening are required. When using a pipe, only the closing process of the opening is required. , Can simplify the manufacturing process and reduce manufacturing costs. In addition, the □ of the outlet has a small inlet pressure to open the medium and requires engineering. -11-552219 V. Description of the invention (10) The joints can also be reduced, so the leakage of the pressurized media caused by poor fusion can also be reduced. In the above-mentioned manufacturing method, it is suitable to be processed by expanding or rotating the pipe. It is preferable to insert a sealing pin into the fine hole and fill it with a pressurized medium. Then, the portion of the sealing pin is welded and closed. In the above-mentioned manufacturing method, it is suitable to be processed by expanding or rotating the pipe. It is preferable to insert a sealing pin into the fine hole and fill it with a pressurized medium. Then, the portion of the sealing pin is welded and closed. The "pipe expansion method" is a method of forging, which is a method of compressing and forming a raw material along its length and right angles. "Rotary processing method" can also be called deep drawing processing method, which is to make a metal plate or a semi-finished product initially formed by this high-speed rotation, and press it with a jig or forming roller to make the circular section hollow. How the product is shaped. The inflator of the present invention not only does not reduce the pressure resistance and durability required for the inflator, but also achieves small size and weight reduction. Furthermore, when the manufacturing method of the present invention is applied, manufacturing processes can be simplified and manufacturing costs can be reduced. The inflator of the present invention can be used as an inflator for an airbag in a driver's seat, an inflator for an airbag in an assistant's seat, an inflator for an airbag in a side, an inflator for an airbag in a curtain, an inflator for an airbag in a knee pillow, Various inflator such as inflators for airbags of blu safety belts, inflators for airbags of tubular systems, inflators for airbags of pretensioners, and the like. The inflator of the present invention can also be used as an airbag inflator for curtains or its -12-552219 V. Description of the invention (11) Other aspects. The curtain airbag inflator is mounted on the curtain airbag. When the vehicle is turning, it is very effective to prevent passengers from running out of the window. It can form a curtain-shaped wall, and other airbags to protect passengers in the event of a side collision are also installed. Brief Description of the Drawings Fig. 1 is a cross-sectional view in the longitudinal direction of the inflator of the present invention; Fig. 2 is a graph showing the pressure over time in a 60 L tank pressure test performed in the first embodiment and the third comparative example Change diagram; Fig. 3 is a cross-sectional view of the inflator of the present invention in a longitudinal direction; Fig. 4 is a diagram showing a pressure history in a 60L tank pressure test performed in the third and fourth embodiments and the fifth and sixth comparative examples. Time chart; Figure 5 is a graph showing the change of pressure with time in a 60L tank pressure test performed in the fifth and sixth embodiments and the seventh comparative example; Figure 6 is an illustration for tube expansion processing; Figure 7 The figure is a diagram for explaining rotation processing. Detailed description of the preferred embodiment of the present invention Embodiment (1) The following will describe a preferred embodiment of the present invention with reference to the accompanying drawings. Fig. 1 is a longitudinal sectional view of an inflator 110 of the present invention. The inflator shell 11 2 is a cylindrical pressure-resistant container, and the internal space 11 3 includes a pressurized medium filled with carbon dioxide (liquid) at a filling pressure of 4 MPa or more. This carbon dioxide is filled from the pores provided on the side of the inflator housing 1 12 -13- 552219 5. The pores on the (12) side of the invention description, the pores are closed by welding in the manner of 1 40 in the figure. On one end side of the inflator housing 1 1 2 is provided a combustion chamber housing 1 1 5 which is integrated with the inflator housing Π 2 and protrudes in the internal space Π 3. The combustion chamber housing 1 1 5 is provided with a combustion chamber. Combustion chamber 1 1 6 filled by means Π 7. If the combustion means 1 1 7 can heat the pressurized medium by burning gas, its type and amount are not particularly limited. For example, it can use gunpowder such as boronate for several grams, and other liquid fuels, gas fuels, and liquid fuels can also be used. Or a combination of gaseous fuel and oxidant. The combustion passage 1 1 9 from the combustion chamber 1 1 6 to the internal space 1 1 3 is provided with a first rupture plate 120 and the combustion passage 119 is completely blocked in the middle. The combustion chamber 1 1 6 is maintained at a normal pressure. surroundings. An igniter 122 is provided in contact with the combustion chamber 1 16 as an ignition means, and the igniter 122 is riveted to the end portion 123 of the inflator housing 112 and fixed. This igniter 122 occludes one end of the inflator housing 112. The other end of the inflator housing 1 12 is provided with a diffuser portion 1 30, and a side portion of the diffuser portion 1 30 is provided. A mixed gas (hereinafter referred to as a mixed gas) of the pressurized medium and the combustion gas is required to release the gas discharge port 1 3 1 to the outside, and a filter made of a metal mesh provided to cover the gas discharge port 丨 3 1 from the inside 1 3 2. Therefore, the mixed gas must pass through the filter 1 3 2 and be discharged to the outside from the gas discharge port 1 3 1. Mixed gas path 1 3 5 from diffuser section 1 to internal space 1 1 3 5 5 -14- 552219 V. Description of the invention (13) A second rupture plate 1 3 6 'mixed gas path 1 3 5 is completely For reasons of interruption, the diffuser section 130 is also maintained in a normal pressure environment. The mixed gas inflow chamber 1 3 8 is provided between the second rupture plate 1 3 6 and the internal space 11 3 and is integrally formed with the inflator casing 1 1 2 and protrudes on the internal space Π 3. The mixed gas inflow chamber 1 A number of communication holes 1 3 9 are provided on the side of 3 8. Next, the operation of the inflator 110 will be described. When mounted on a vehicle, the inflator 110 is set to include an action signal output means formed by an impact sensor and a control unit, and a combination of the inflator 110 and a module for accommodating an airbag in a box. The system. Then, when the vehicle is impacted, the signal from the impact sensor of the system is activated, and the igniter 12 is activated to cause the combustion means 11 to catch fire. The generated high-temperature combustion gas destroys the first rupture plate 120. Then, the high-temperature combustion gas flows into the internal space 1 1 3, and the pressurized medium (carbon dioxide) is heated and expanded to increase the internal pressure. Therefore, the mixed gas flows from the communication hole 1 3 9 into the mixed gas flow chamber 1 3 8 so that The internal pressure is increased, so that the second rupture plate 136 is broken. The mixed gas is then discharged through the gas discharge port 131 through the mixed gas passage 135 and the mixed gas filter 132 to inflate the airbag. ^ Embodiment of the Invention (2) The following will describe a preferred embodiment of the present invention with reference to the drawings. Fig. 3 is a longitudinal sectional view of the inflator of the present invention. First, Embodiment (2) -1 will be described. One end side of the inflator shell 1 2 -15- 552219 V. Description of the invention (16) ′ The airbag can be kept inflated for several seconds. Next, Embodiment (2) -2 will be described. Embodiments (2)-2 The structures of the inflator 10 for curtains of the embodiment (2)-1 are almost the same, and only the differences will be described. The inner space 16 of the inflator shell 12 is filled with a pressurized medium composed of an inert gas at a pressure of 40,000 kPa or higher, and the upper limit can reach 20,000 kPa. Then, in order to increase the charging pressure, "in this embodiment, compared with the case where the pressurized medium is 35,000 kPa," the inflator shell is at the same diameter and the length is only 70% shorter. The inflator 10 for a curtain of the second embodiment has the same operation as that of the first embodiment. However, in the case where the inflator of the present invention is applied to a side inflator, a part of the gas discharge port 22 is directly or connected to the airbag through an appropriate connector. Embodiment of the Invention (3) The following will describe one-preferred embodiment of the present invention with drawings. Fig. 3 is a longitudinal sectional view of the inflator 10 for a curtain of the present invention. The inflator housing 12 has an opening 14 at one end side and the other end side is closed. The internal space 16 is filled with a pressurized medium formed of only an inert gas at a maximum pressure of 35,000 kPa. The cross section of the inflator casing 12 in the width direction is circular, and the opening portion 14 is also circular. The shell of the inflator shell 12 is processed by the tube expansion method or the rotary processing method, so that the pores that become the filling holes of the pressurized medium on one end side can be completely left in the remaining state. -18-552219 5. Description of the invention (18) at 400 If it is at least m / s, it is not particularly limited. From the viewpoint of safety, it is preferably ammonia (970 m / s), neon (45 m / s), and argon (3 19 m / s). It is better to select one or two or more mixtures of inert gas such as sec), nitrogen (3 37 m / s), and so on. Mixtures of nitrogen and / or carbon dioxide are also possible. However, the maximum charge pressure of the pressurized medium at 20 ° C can be as high as 35,000 kPa. In the case of the conventional inflator, although the maximum filling pressure of the pressurized medium can be up to 3 5,000 kPa, the size in the longitudinal direction can be shortened, and the filling pressure can be increased to a level of more than 40,000 kPa, thereby achieving the inflator shell portion. Lightweight and compact. The filling pressure of the pressurized medium is preferably at least 50,000kPa. When the requirement (c) is set to 1, the discharge pressure of the pressurized medium during operation is controlled to an appropriate pressure. Here, when 81/1/2 is 1 or more, the expansion speed is determined only by A2. The expansion speed cannot be easily adjusted. When the expansion speed is not to be adjusted, A " A2 may be 1 or more. Requirements (A " A2 < 1 in 0 is better and better, 0 · 85 is the best. The lower limit of Ai / A2 can be set to 0 · 〇 1 5. When A2 is as large as possible, pressurize the media. The release is smooth, so it is better. The maximum is the same as the cross-sectional area in the width direction of the inflator shell. Although the present invention will be described in more detail with examples below, the present invention is not limited by these examples. 20-552219 V. Description of the invention (19) Example 1 Manufacture an inflator according to the first figure, using carbon dioxide as a pressurizing medium, at a filling pressure of 6 MPa (filling density is 23,400 mol / m3; 3 8 g ) Is used for charging. The burning method uses boronite 4.5 g. The maximum diameter of this inflator is 30 mm, the length is 150 mm, and the total weight is 300 g. Use this inflator to conduct a 60 L tank test and determine The pressure curve results are shown in Figure 2. Comparative Example 1 The argon gas was used instead of carbon dioxide, and the filling pressure was 3 OMPa (filling density was 12,000 mol / m3; 41 g). The same inflator as in Example 1. This inflator has a maximum diameter of 30 mm and a length of 2 50 mm, with a total weight of 400 grams. Comparative Example 2 Replacement of carbon dioxide with helium, a filling pressure of 5 OMPa (filling density of 1,400 mol / m3; 4.1 g), and no combustion Inflator with a means. The maximum diameter of the inflator is 30 mm, the length is 200 mm, and the total weight is 280 grams. Comparative Example 3 An inflator without a combustion means was made using carbon dioxide as a pressurizing medium. The filling pressure is 6MPa (the filling density is 23,400 moles / m3; 45g). The maximum diameter of this inflator is 30mm, the length is 140mm, and the total weight is 280g. Use this inflation The device performs a 60L tank test, and the pressure curve is measured. The results are not shown in Figure 2. -21-552219 V. Description of the invention (21) Pressurized medium Example 3 Helium 100% Example 4 Helium 100% Comparison Example 5: 96% argon, the rest is ammonia. Comparative Example 6: argon 96%, the rest is helium filling pressure (kPa) 50,000 32,000 50,000 32,000 Figure 4 shows clearly that Example 3, Example 4 and Comparative Example 5, 6 During comparison, the maximum pressure arrival time becomes shorter. Examples 5, 6, and Comparative Example 7 are shown in Figure 3. For the inflator, use the "eight" 2 to adjust the latter according to the following methods, and any one is filled with helium at a filling pressure of 50,000 kPa. Using these inflators, perform an internal pressure test using a 60L tank at a temperature of 23 ° C. The change over time of the obtained pressure curve is shown in Figure 5. Example 5 A! / A2 = 33 mm2 / 33 mm = 1.0 Example 6 A! / A2 = 15.7 mm2 / 33 square Mm = 0.47 Comparative Example 7 A! / A2 = 63.5 square millimeters / 33 square millimeters = 1.9 In Figure 5, it is obvious that the areas of Examples 5 and 6 are changed by A, so that A " A2 is adjusted. Below 1, the release speed of the pressurized medium can be changed. On the other hand, the A " A2 of Comparative Example 5 exceeds 1, and even if the area of Ai changes greatly, it is not restricted. The release speed can be increased. Example 7 An inflator 10 for manufacturing a curtain shown in FIG. 3 and an inflator housing 12 were manufactured by expanding a tube with the following tubes. -23- 552219 V. Description of the invention (22) Pipe material: carbon steel pipe ^ Pipe length: about 150 mm Pipe outer diameter: about 30 mm Pipe thickness: 2 mm Expanded pipe processing details, as shown in Figure 6 As shown. Firstly, as shown in Fig. 6 (a), the tube is embedded in the lower jig to fix it. Secondly, as shown in Fig. 6 (b), the above jig is expanded, as shown in Fig. 6 (C). An inflator was obtained in which the pores were almost occluded in the residual state. The thus obtained inflator housing 12 is welded and joined with the diffuser portion 20, and a filter 24 made of a metal mesh is arranged, embedded in the igniter 26, and then connected to the connector 32 to form the inflator 10. The inside of the inflator casing 12 is filled with ammonia gas, so that the internal pressure becomes 62 kPa. And set it to A " A2 0.20. Example 8 An inflator 10 was produced in the same manner as in Example 7 except that the tube was processed by rotation. Details of the rotation process are shown in Figure 7. As shown in Fig. 7 (a), after the tube is fixed on the frame, it is rotated in the direction of the arrow. After the fixture shown in Fig. 7 (b) is pressed, it is rotated and processed, as shown in Fig. 7 (c). Thus, the inflator shell 12 with the pores almost closed in the residual state was obtained. DESCRIPTION OF SYMBOLS 1 10 Inflator 1 12 Inflator housing -24- 552219 V. Description of the invention (23) 113 Internal space 115 Combustion chamber housing 116 Combustion chamber 117 Combustion means 119 Combustion passage 120 First rupture plate 122 Igniter 123 End portion 130 Diffuser plate 13 1 Gas exhaust port 132 Filter 135 Mixed gas passage 136 Second rupture plate 138 Mixed gas inflow chamber 139 Communication hole 10 Aerator 12 Aerator housing 14 Opening 19 Rupture plate 20 Diffuser plate 22 Gas outlet 26 Igniter 29 end 30 conductive pin 31 〇 ring 32 connector -25-