M366944 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種氣壓棒’特別是指一種雙管式氣 壓棒。 【先前技術】 如圖1所示，一般安裝於桌具或椅具，而用以調整桌 面或座墊高度的氣壓棒1，大致包括一用以固定於桌台或坐 墊並可上下位移地插置於一腳桿1〇〇中之外缸體H、一設 置於外缸體11中之内缸體12、一安裝於内缸體12中並往 下突伸出外缸體11底端外之活塞桿機構13，及一安裝於外 缸體11與内缸體12頂端部間之控制機構14。該控制機構 14可被驅動開啟而導通内缸體12與外缸體u間之氣室空 間（圖未標示）’使得該活塞桿機構13之活塞样131可相 對外缸體11伸縮，而改變該氣壓棒i長度，進而改變桌面 或座墊高度。但受限於該單一控制機構14的結構設計，該 氣壓棒1僅旎知供單向驅動控制功能，所以桌具或椅具之 調1機構（圖未示）設置位會受限於控制機構1位置，使 得現有桌具或椅具的高度調整方式與調整機構設置位置都 相對受限而少有變化。 【新型内容】 因此本新型之目的’即在提供—種具雙向調整功能 而方便使用的氣壓棒。 於是，本新型氣屋棒，包含一缸體機構、一活塞機構 第控制機構，及一第二控制機構。該紅體機構包括 3 M366944 徑向内外間隔且上下延伸地同軸套置之一内缸體與一外缸 體，且内、外缸體相配合界定出一介於兩者相向周面間之 第一空間，及一位於内缸體中之第二空間，且第一與第二 空間頂端相連通。該活塞機構包括—塞裝於内缸體中並將 第二空間區隔成一下氣室與一和第_空間連通之上氣室的 活塞座，na接於活塞座並往上穿出外缸體頂端之中空 的活塞桿，活塞座具有一與下氣室連通之第一閥孔，及一 連通於第-閥孔與上氣室間之第—連通孔。該第_控制機 構包括-氣密隔開第-閥孔與下氣室地插裝於活塞座中之 第一活塞銷，及一穿設於活塞桿中並可往下推移第一活塞 銷而使第-閥孔開啟且導通上、下氣室之第—作動桿。該 第二控制機構包括一塞裝固定於外缸體與内缸體底端部間 之控制閥、-插裝於控制閥中之第二活塞銷，及—插裝於 外缸體底端部中並可往上推移第二活塞銷之第二作動桿， 該控制閥具有一與下氣室連通之第二閥孔，及一連通於第 閥孔與第▲間間之第二連通孔，該第二作動桿是氣密 阻隔第二閥孔與下氣室地插裝於控制閥中，並可被第二作 動桿往上推移而使第二閥孔開啟且導通下氣室與第一空間 本新型之功效··透過活塞機構，及第—與第二控制機 構之結構設計，使得該！^棒具有雙向驅動控制功能，可 方便於安裝在桌具或椅具後，提供不同類型之調控機制。 【實施方式】 有關本新型之前述及其他技術内容、特點與功效，在 M366944 以下配合參考圖式之—個較佳實施例的詳細說明中，將可 清楚的呈現。 如圖2 4所示，本新型氣壓棒之較佳實施例適用於安 裝在桌具和椅具上，而可用以調整桌面與坐墊之高度。該 氣壓棒3包含-缸體機構4、_安裝於缸體機構4中之活塞 機構5、-安衷於活塞機構5之第一控制機構6,及一安裝 於缸體機構4中之第二控制機構7。 該缸體機構4包括徑向間隔且上下延伸地同軸套置之 外缸體41與-内叙體42，及__塞裝固定於外缸體頂 端部中且靠抵於内缸體42頂端之油封組# 43。該内虹體 42是設置於外缸體41中，且與外缸體41相配合界定出— 介於兩者相向周面間之一第一空間4〇1，及一位於内缸體 42中之第二空間4〇2。 該油封組件43包括一往下限位塞抵於内缸體42頂端 之培林431、一疊接於培林431頂端之油封433，及一疊接 於油封433頂端並往上限位靠抵於外缸體μ頂端的油封座 434，且该培林43 1具有一連通於第一空間4〇丨與第二空間 402頂端間之氣孔432。由於該油封組件43並非本新型之 創作重點，且類型眾多，因此不再詳述。 該活塞機構5包括一可上下位移地氣密塞裝於内缸體 42中之活塞座51，及一同軸固接於活塞座51並往上氣密 貫穿油封組件43而延伸穿出外缸體41頂端之活塞桿52。 該活塞座52將第二空間402區隔成上下間隔之一下氣室 403，及一經由培林431之氣孔432而與第一空間4〇1頂端 5 M366944 連通之上氣室姻。且該活塞座51具有一軸向延伸至盆底 面而與下氣室403連通之第一閥孔51〇，及一徑向貫穿其内 外周面並連通於第一閥孔51〇與上氣室4〇4間之第一連通 孔514 ’且該第—閥孔51〇由上往下依序具有—與第一連通 孔叫連通之小孔㈣511、一肩部512，及一孔徑大於小 孔㈣川且與下氣室彻連通之大孔徑部513。該活塞桿 =疋連Γ插裝固定於活塞座51上半段中，且與該小孔徑部 該第-控制機構6包括一可上下位移地插裝於第 孔5H)中並用以蓋封第一閥孔51〇之第一活塞銷η，及— 二上下位移地穿設於活塞桿52中並往下頂抵於第一活塞銷 頂端之第-作動桿62。該第一活塞銷Μ具有一往上限 =於該肩· 512之密封部611，及一固接於該密封部 1並«於第-間孔510中之軸桿部612，且該密封部 乳錢開大、小孔徑部513、511，而該轴桿部612是往 上頂抵於作動桿62底端。該第—作動桿62可被往下推移 ，而驅使第—法耷辦a 邱對活塞座51下移，使得該密封 下T移出大孔徑部513外，而開啟第一閥孔51〇，使 /至4〇3可經由第一閱孔510與第一連通孔514而和上 氣室404連通。 圖3 5所不’該第二控制機構7是安裝固定於外虹 =底端部中’並包括—往下靠抵於料體Μ底端之安 I 可上下位移地插裝於控制閥72中之第二活 M366944 塞銷73，及一可上下位移地穿設於安裝座71中並往上頂抵 於第二活塞銷73底端之第二作動桿74。 該控制閥72具有一軸向延伸至其頂面而與下氣室4〇3 連通之第二閥孔720,及一徑向貫穿其内外周面且連通於第 二閥孔720與第一空間401底端間之第二連通孔724，且該 第二閥孔720由上往下依序具有一與下氣室4〇3連通之大 孔徑部721、一肩部722，及一孔徑小於大孔徑部721且與 - 苐一連通孔724連通之小孔徑部723。 • 該第二活塞銷73是插裝於第二閥孔720中，並具有一 往下限位靠抵於該肩部722之密封部731，及一固接於密封 部731並往下插裝於第二閥孔72〇中之軸桿部732，且該密 封部731氣密隔開大、小孔部721、723，而該軸桿部乃2 疋往下頂抵於第二作動桿74頂端。該第二作動桿74可被 往上推移，而連動第二活塞銷73相對控制閥72上移，使 得第二活塞銷73之密封部731往上移出大孔徑部721，而 φ 開啟第—闕孔720 ’使下氣室403可經由第二閥孔72。與第 —連通孔724而和第一空間4〇1連通。 Q 3 6、7所示該氣壓棒3使用時，用以調整氣壓 棒3之伸縮長度的方法有兩種分別如下說明： 、 、第#驅動方式是驅動第-作動桿62，當第—作動桿 52時 62被，下推移，而連動使第-活塞銷61之密封部611往下 Z離第—閥孔510外時，會導通下氣室403與上氣室4〇4， 在=《塞銷61被推移，而使第一閥孔51()開啟的情況下 田相對外缸體41施加—軸向往下力量於該活塞桿 7 M366944 ，便可驅使該活塞桿52連動該活塞座51相對外缸體4ι下 移，使活塞桿52逐漸縮入外缸體41中。於此同時，被連 動下移之活塞座51會迫使下氣室4〇3之高壓空氣經由第一 閥孔510與第一連通孔514而流入上氣室4〇4中，使得上 氣室404處於相對高壓之狀態，而積存一復位力量。 當施加於活塞桿52與第一作動桿62之力量消失，上 氣室404中之高壓氣體會經由第一閥孔51〇回流至下氣室 4〇3中，並逐漸往上推移該活塞座5卜連動使該活塞桿a 逐漸往上突伸出外缸體41夕卜’直至活塞座51復位靠抵於 油封組件43而限位。此時，當該活塞桿52與外缸體41再 相對受到-轴向壓縮力量時’由於第—活塞銷61已不再被 往下頂推，所以活塞座51被往下推移，而於下氣室4〇3中 產生之瞬間氣體壓力，會立即將第一活塞銷Μ之密封部 6U往上推抵於第-閥孔51〇之肩部512，而再次封閉第二 閥孔510，使得活塞座51 |、、i s &功 又于百暴/丄51無法再位移，所以氣壓棒3盔法 再伸縮調整長度。 ‘' 弟二樘驅動氣壓棒3之方式，是往上推移第二_ 7“當第二作動桿74被往上推移時，會連動該第二活約 :3相對控制閥72上移，使得第二活塞銷乃之密封部73 往上移出大孔徑部721，而邋、s 丁 > ~ Λ n 而導通下鐵^至403與第二閥孔72 0此時，當相對外缸體41 把加一軸向往下力量於活塞桿5 時，便可驅使活塞桿52帶動'成ςι π 咿動/舌基座51下移，而逐漸縮/ 外缸體41中，於此/§] 0主 .,y 片 门打，被往下推移之活塞座51會迫相 下氣室403中之氣體經由第一 弟一閥孔720與第二連通孔72; M366944 而流置f-空間401巾，並經由培林431之氣孔w而流 入上軋至404中，使上氣室4〇4處於相對高壓狀態。 田鉍加於活塞桿52與第二作動桿74的力量消失後， 子门壓之上氣至404中的氣體會經由第一空間4〇1與第 4孔720回仇至下氣室4〇3巾迫使活塞座η逐漸往上 回移復位’而連動使活塞桿52逐漸往上突伸出外缸體W 外’直至活塞座51復位靠抵於該油封組件43而限位。此 時’因第二活塞鎖73以不再被往上頂推，因此，當活塞桿 52與外缸體41 #次相對受-軸向《縮力量時，活塞座51 下移而於下氣冑403中產生之瞬間氣體壓力，會迫使第二 活塞銷73之密封部731下移靠抵於第二閥& -之肩部 722’而再次封閉第二閥孔72()，使得活塞座η無法再下移 ，而無法再調整氣壓棒3之伸縮長度。 在本實施例中，第—空間401與第二空間402是經由 油封組件43之氣孔432而相互連通，但實施時，該油封組 件43不以設置氣孔為必要，且第一空間4〇丨與第二空間 4〇2頂端間之連通方式眾多，不以上述方式為限。 紅上所述，透過活塞機構5，及第一與第二控制機構6 、7之結構設計，使得該氣壓棒3具有雙向驅動控制功能， 可方便於安裝在桌具或椅具後，提供不同類型之調控機制 ，而可相對提高桌具或椅具之高度調整機構的設置變化性 ’進而有助於提高加工製成之桌具和肖具的市場競爭力， 故確實能達成本新型之目的。 准以上所述者，僅為本新型之較佳實施例而已，當不 M366944 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一習知雙管式氣壓棒之側視剖面圖； 圖2是本新型氣壓棒之—較佳實施例的立體分解圖 圖3是該較佳實施例的側視剖面圖； 圖4是圖3上半部之局部放大圖； 圖5是圖3下半部之局部放大圖； 且 圖6是類似圖3之視圖，說明第一 一活塞桿被驅動縮入一外缸體中的情、、兄 控制機構被 ;及 驅動， 圖7是類似圖3之視圖，說明第 且活塞桿被驅動縮入外缸體中的情況。 二控制機構被驅動， 10 M366944M366944 V. New description: [New technical field] The present invention relates to a gas pressure rod ‘in particular to a double tube gas pressure rod. [Prior Art] As shown in Fig. 1, generally mounted on a table or chair, the air pressure bar 1 for adjusting the height of the table or the seat cushion generally includes a pin for fixing to the table or the cushion and being vertically displaceable. The inner cylinder 12 disposed in the outer cylinder 11 and the inner cylinder 12 disposed in the outer cylinder 11 are mounted in the inner cylinder 12 and project downwardly from the bottom end of the outer cylinder 11 The piston rod mechanism 13 and a control mechanism 14 mounted between the outer cylinder block 11 and the top end portion of the inner cylinder block 12. The control mechanism 14 can be driven to open to open the air chamber space (not shown) between the inner cylinder block 12 and the outer cylinder block u such that the piston sample 131 of the piston rod mechanism 13 can be expanded and contracted relative to the outer cylinder block 11 to be changed. The length of the gas bar i, which in turn changes the height of the table or seat cushion. However, limited to the structural design of the single control mechanism 14, the gas pressure bar 1 is only known for the one-way drive control function, so the setting position of the table or chair adjustment mechanism (not shown) may be limited by the control mechanism. 1 position, the height adjustment mode of the existing table or chair and the adjustment mechanism setting position are relatively limited and rarely changed. [New content] Therefore, the purpose of the present invention is to provide a gas pressure bar with a two-way adjustment function and convenient use. Therefore, the novel gas house bar comprises a cylinder mechanism, a piston mechanism first control mechanism, and a second control mechanism. The red body mechanism comprises 3 M366944 radially inner and outer spaced and coaxially disposed one of the inner cylinder and the outer cylinder, and the inner and outer cylinders cooperate to define a first between the opposite circumferential surfaces a space, and a second space in the inner cylinder, and the first and second space top ends are in communication. The piston mechanism includes a piston seat that is plugged into the inner cylinder and partitions the second space into a lower air chamber and a gas chamber connected to the first space and the first space. The piston is connected to the piston seat and passes upwardly out of the outer cylinder. a hollow piston rod at the top end of the body, the piston seat has a first valve hole communicating with the lower air chamber, and a first communication hole communicating between the first valve hole and the upper air chamber. The first control mechanism includes a first piston pin that is airtightly inserted into the piston seat from the first valve hole and the lower air chamber, and a first piston pin that is inserted into the piston rod and can be pushed down The first valve hole is opened and the first-actuating rod of the upper and lower air chambers is turned on. The second control mechanism includes a control valve fixed between the outer cylinder and the bottom end of the inner cylinder, a second piston pin inserted into the control valve, and - inserted at the bottom end of the outer cylinder And a second actuating rod of the second piston pin, wherein the control valve has a second valve hole communicating with the lower air chamber, and a second communication hole communicating between the second valve port and the ▲th port The second actuating rod is airtightly blocking the second valve hole and the lower air chamber and is inserted into the control valve, and can be pushed up by the second actuating rod to open the second valve hole and open the lower air chamber and the first Space The effect of this new type · Through the piston mechanism, and the structural design of the first and second control mechanisms, make this! The rod has a two-way drive control function, which can be easily installed on a table or chair to provide different types of control mechanisms. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the following description of the preferred embodiments of the present invention. As shown in Fig. 24, the preferred embodiment of the novel gas pressure bar is suitable for mounting on tables and chairs, and can be used to adjust the height of the table top and the seat cushion. The gas pressure bar 3 includes a cylinder mechanism 4, a piston mechanism 5 mounted in the cylinder mechanism 4, a first control mechanism 6 that is integrated with the piston mechanism 5, and a second unit mounted in the cylinder mechanism 4. Control mechanism 7. The cylinder mechanism 4 includes a cylinder block 41 and an inner body 42 that are coaxially sleeved and vertically extended, and are fixed to the top end of the outer cylinder and abut against the top end of the inner cylinder 42. Oil seal group # 43. The inner siphon body 42 is disposed in the outer cylinder block 41 and is defined to cooperate with the outer cylinder block 41 - one of the first spaces 4 〇 1 between the opposite circumferential faces, and one of the inner cylinder blocks 42 The second space is 4〇2. The oil seal assembly 43 includes a Palin 431 having a lower limit plug against the top end of the inner cylinder block 42, an oil seal 433 overlapping the top end of the Palin 431, and a top end of the oil seal 433 and abutting against the upper limit. The oil seal seat 434 of the top end of the cylinder block μ, and the Palin 43 1 has a gas hole 432 communicating between the first space 4〇丨 and the top end of the second space 402. Since the oil seal assembly 43 is not the focus of the present invention and is of various types, it will not be described in detail. The piston mechanism 5 includes a piston seat 51 that is airtightly inserted into the inner cylinder block 42 and is vertically fixedly coupled to the piston seat 51 and airtightly penetrates the oil seal assembly 43 to extend through the outer cylinder block. 41 top piston rod 52. The piston seat 52 divides the second space 402 into a lower air chamber 403, and a gas chamber 433, which communicates with the top end 5 M366944 of the first space 4〇1 via the air hole 432 of the Palin 431. The piston seat 51 has a first valve hole 51〇 extending axially to the bottom surface of the basin to communicate with the lower air chamber 403, and a radial passage through the inner and outer peripheral surfaces thereof and communicating with the first valve hole 51 and the upper air chamber. The first communication hole 514' of the 4〇4 and the first valve hole 51〇 sequentially has a small hole (4) 511, a shoulder portion 512, and a hole larger than the first communication hole. A large aperture portion 513 having a small hole (four) and communicating with the lower air chamber. The piston rod=疋连Γ is inserted and fixed in the upper half of the piston seat 51, and the first control mechanism 6 includes a vertically displaceable insertion into the first hole 5H) and is used for sealing the first portion The first piston pin η of a valve hole 51〇, and the second piston rod η are disposed in the piston rod 52 and are vertically displaced against the first actuating rod 62 at the top end of the first piston pin. The first piston pin has an upper limit=the sealing portion 611 of the shoulder 512, and a shaft portion 612 fixed to the sealing portion 1 and in the first-to-one hole 510, and the sealing portion is milk The money opens the large and small aperture portions 513, 511, and the shaft portion 612 abuts against the bottom end of the actuating lever 62. The first actuating lever 62 can be pushed down, and the first method is driven to move the piston seat 51 downward, so that the seal lower T moves out of the large aperture portion 513, and the first valve hole 51 is opened, so that the first valve hole 51 is opened. / to 4 〇 3 may be in communication with the upper air chamber 404 via the first through hole 510 and the first communication hole 514. Figure 3 5 is not the second control mechanism 7 is mounted and fixed in the outer rainbow = bottom end portion and includes - down to the bottom end of the body 安 I can be inserted up and down the control valve 72 The second live M366944 plug pin 73, and a second actuating rod 74 that can be inserted up and down in the mounting seat 71 and uplifted against the bottom end of the second piston pin 73. The control valve 72 has a second valve hole 720 extending axially to the top surface thereof and communicating with the lower air chamber 4〇3, and a radially extending inner and outer peripheral surface thereof and communicating with the second valve hole 720 and the first space a second communication hole 724 between the bottom end of the 401, and the second valve hole 720 has a large aperture portion 721, a shoulder portion 722, and a smaller aperture than the lower air chamber 4? The aperture portion 721 has a small aperture portion 723 that communicates with the -one communication hole 724. The second piston pin 73 is inserted into the second valve hole 720 and has a sealing portion 731 that abuts against the shoulder portion 722 to the lower limit position, and is fixed to the sealing portion 731 and inserted downwardly. a shaft portion 732 of the second valve hole 72, and the sealing portion 731 hermetically separates the large and small hole portions 721, 723, and the shaft portion is 2 疋 downwardly abuts against the top end of the second actuating rod 74 . The second actuating lever 74 can be pushed upward, and the second piston pin 73 is moved up relative to the control valve 72, so that the sealing portion 731 of the second piston pin 73 moves upwardly out of the large aperture portion 721, and φ opens the first The aperture 720' allows the lower plenum 403 to pass through the second valve aperture 72. And the first communication hole 724 is in communication with the first space 4〇1. When the gas bar 3 shown in Q 3 6 and 7 is used, there are two methods for adjusting the telescopic length of the gas bar 3 as follows: , , , ## drive mode is to drive the first actuating lever 62, when the first actuating When the rod 52 is 62, it is pushed down, and when the sealing portion 611 of the first piston pin 61 is moved downward from the first valve hole 510, the lower air chamber 403 and the upper air chamber 4〇4 are turned on. The plug pin 61 is pushed, and when the first valve hole 51 () is opened, the field is applied with respect to the outer cylinder 41 - axially downward force on the piston rod 7 M366944, which can drive the piston rod 52 to interlock with the piston seat 51. The outer cylinder 4i is moved downward to gradually retract the piston rod 52 into the outer cylinder 41. At the same time, the piston seat 51 that is moved down is forced to press the high-pressure air of the lower air chamber 4〇3 into the upper air chamber 4〇4 through the first valve hole 510 and the first communication hole 514, so that the upper air chamber The 404 is in a relatively high state and accumulates a reset force. When the force applied to the piston rod 52 and the first actuating lever 62 disappears, the high-pressure gas in the upper air chamber 404 is returned to the lower air chamber 4〇3 via the first valve hole 51, and the piston seat is gradually pushed upward. 5 linkages cause the piston rod a to gradually protrude upwardly from the outer cylinder 41 until the piston seat 51 is reset against the oil seal assembly 43 to be restrained. At this time, when the piston rod 52 and the outer cylinder 41 are again subjected to the axial compression force, the piston seat 51 is pushed downward because the first piston pin 61 is no longer pushed downward. The instantaneous gas pressure generated in the gas chamber 4〇3 immediately pushes the sealing portion 6U of the first piston pin up to the shoulder portion 512 of the first valve hole 51〇, and closes the second valve hole 510 again, so that the second valve hole 510 is closed again. The piston seat 51 |,, is & work can no longer be displaced in a hundred storms / 丄 51, so the pressure bar 3 helmet method and then telescopic adjustment length. '' The second way to drive the gas pressure bar 3 is to move up the second _ 7" when the second actuating rod 74 is pushed up, the second live action will be linked: 3 the relative control valve 72 moves up, so that The sealing portion 73 of the second piston pin is moved upwardly out of the large aperture portion 721, and 邋, s 〜 〜 Λ n is turned on to the lower iron 至 403 and the second valve hole 72 0. At this time, when the outer cylinder 41 is opposed When the first axial force is applied downward to the piston rod 5, the piston rod 52 can be driven to drive the 'pushing π 咿 / the tongue base 51 is moved downward, and gradually shrinks / the outer cylinder 41, here / §] 0 main The y piece is hit, and the piston seat 51 that is pushed down will force the gas in the lower air chamber 403 to flow through the first valve hole 720 and the second communication hole 72; M366944, and the f-space 401 towel is placed. And flowing into the 404 through the air hole w of the Palin 431, so that the upper air chamber 4〇4 is in a relatively high pressure state. After the force applied to the piston rod 52 and the second actuating rod 74 disappears, the sub-gate is pressed. The gas from the upper air to the 404 will be repelled through the first space 4〇1 and the fourth hole 720 to the lower air chamber 4〇3 towel, forcing the piston seat η to gradually move back and reset, and the piston rod 52 is gradually connected. Extending out of the outer cylinder W' until the piston seat 51 is reset against the oil seal assembly 43 to limit the position. At this time, because the second piston lock 73 is no longer pushed up, therefore, when the piston rod 52 is When the outer cylinder 41 is relatively subjected to the axial force, the instantaneous gas pressure generated by the piston seat 51 moving downward in the lower gas cylinder 403 forces the sealing portion 731 of the second piston pin 73 to move downward. The second valve & - shoulder 722' again closes the second valve hole 72 (), so that the piston seat η can no longer move down, and the telescopic length of the gas bar 3 can no longer be adjusted. In this embodiment, the first The space 401 and the second space 402 communicate with each other via the air holes 432 of the oil seal assembly 43, but in practice, the oil seal assembly 43 is not necessary to provide air holes, and the first space 4 〇丨 and the second space 4 〇 2 top end There are many ways of connecting, which are not limited to the above manner. The red body, through the piston mechanism 5, and the structural design of the first and second control mechanisms 6, 7 make the gas pressure bar 3 have a bidirectional driving control function, which is convenient Provide different types of control mechanisms after installation on tables or chairs. It can improve the setting variability of the height adjustment mechanism of the table or chair, which in turn helps to improve the market competitiveness of the table and the tool made by the processing, so it can achieve the purpose of the present invention. It is only a preferred embodiment of the present invention. When M366944 can limit the scope of the present invention, the simple equivalent changes and modifications made by the novel patent application scope and the new description contents are still BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1 is a side cross-sectional view of a conventional double tube gas pressure bar; Fig. 2 is an exploded perspective view of a preferred embodiment of the present invention; 4 is a partial enlarged view of the upper half of FIG. 3; FIG. 5 is a partial enlarged view of the lower half of FIG. 3; and FIG. 6 is a view similar to FIG. The piston rod is driven to retract into an outer cylinder, and the control mechanism is driven; and Fig. 7 is a view similar to Fig. 3, illustrating the case where the piston rod is driven into the outer cylinder. Two control mechanisms are driven, 10 M366944
【主要元件符號說明】 3' -…氣壓棒 5 14… …第一連通孔 > -Ϊ ¢. « ^ ^ …缸體機構 •…活塞桿 401… •…第一空間 V. -ϊ V. ή Κ 4 t …·第一控制機構 402… …第二空間 61… …·第一活塞銷 403… ^ ·下氣室 611" …密封部 4 0 4… •…上氣室 612 •…轴桿部 1 » »· » ί.、' …*外缸體 6 2 ”1 … …第一作動桿 42…… •…内缸體 ：< «. κ » U < I ……第二控制機構 &$>»«· a •…油封組件 71 *… …·安裝座 4 3 1… …·培林 …·控制閥 432… …·氣孔 720… >…第二閥孔 4 3 3… •…油封 72 1… •…大孔徑部 4 3 4… …·油封座 722… …·肩部 ♦ β ♦ (¾ <· * 1 …活塞機構 7 2 3… 一，小孑匕αΡ 5 1、、1ί <> X ·» > :…活塞座 724… …第二連通孔 5 1 0… :…第一閥孔 y 3 “ 〜. •…第二活塞鎖 5 11 3… _…小孔徑部 73 1… …密封部 512"“ …肩部 732… …轴桿部 5 13… …大孔徑部 …第二作動桿 11[Main component symbol description] 3' -...Pneumatic rod 5 14... First communicating hole> -Ϊ ¢. « ^ ^ ...Cylinder mechanism•...Piston rod 401... •...First space V. -ϊ V ή Κ 4 t .... first control mechanism 402 ... second space 61 ... ... first piston pin 403 ... ^ · lower air chamber 611 " ... sealing portion 4 0 4 ... • ... upper air chamber 612 • ... shaft Rod 1 » »· » ί., '...* outer cylinder 6 2 ” 1 ... first actuating rod 42... •... inner cylinder: <. κ » U < I ...... second control Mechanism &$>»«· a • Oil seal assembly 71 *... Mounting seat 4 3 1 ... Palin... Control valve 432... Air hole 720... >...Second valve hole 4 3 3 ... •...oil seal 72 1... •...large aperture 4 3 4...·oil seal 722...·s shoulder ♦ β ♦ (3⁄4 <· * 1 ... piston mechanism 7 2 3... one, small 孑匕αΡ 5 1, 1ί <> X ·» > :...piston seat 724...the second communication hole 5 1 0... :...the first valve hole y 3 "~.......the second piston lock 5 11 3... _ ...small aperture portion 73 1 ... sealing portion 512" ... ... ... shoulder 732 of the shaft portion 513 ... ... ... large diameter portion of the second actuating lever 11