M406117 五、新型說明： 【新型所屬之技術領域】 本創作係有關於一種壓力缸之活塞結構，尤指一種可 提升結構強度，且可減少活塞本體外徑之結構者。 【先前技術】 壓力缸内部設有活塞，其外徑約等於壓力缸之内徑， Λ φ 且將壓力缸區隔成二容室，該二容室中係可分別設為氣壓 式、油壓式或氣油壓複合式，該活塞可於壓力缸内滑動， 其主要功能係改變壓力缸包圍的容積，或傳遞壓力缸内氣 體或油體所施加之壓力，因此該活塞結構之設計，對壓力 傳動有極大的影響。 一般常見之活塞係呈中空圓柱狀，該活塞内、外徑分 別設有一環槽，於各該環槽内部分別設有一密封件，使該 • 活塞組設於壓力缸内部並區隔出二容室，且該活塞係相對 ^ 壓力缸位移作動，提供傳遞壓力之實用性功效。 該活塞之組設位置，常見者大致可分為設於轴桿上及 設於管件間者。 按，習知設於軸桿上之活塞結構，如國内第092204057 號新型專利所揭露之「自行車車架外拉式避震器結構改 良」，該避震器係設置一外管體，該外管體一端具一開放 端，另端為封閉端；其中，於該開放端伸入設置一油壓缸 3 M406117 體，該油壓缸體伸入外管體之該端為開放端，端部係固接 一固定活塞，另一端伸出外管體外為封閉狀；於外管體之 封閉端内部固接有一端穿經固定活塞中心並伸入油壓缸體 内之缸軸，該缸軸之端部固接有閥座位在油壓缸體内，且， 閥座上設置有閥孔，閥孔迎向油壓缸體封閉端係定位有一 閥片，閥座將油壓缸體内部區隔有第一油室及第二油室， 朝向外管體封閉端之該端設為第一油室；於第一油室内之 φ 固定活塞與閥座間係設一浮動活塞，且該浮動活塞與固定 活塞之間形成具有間隙之氣室者。 另一習知設於管件間之活塞結構，如國内第099209955 號新型專利所揭露之「油氣分離避震器結構」，包括有一筒 身與一軸向設置於該筒身内的内筒，以及同時封閉筒身與 内筒兩端之一上端蓋與下端蓋，該内筒與該筒身之間間隔 出一容室，該容室係與該内筒相通，且容室内設置有一可 • 上、下滑動之浮動活塞並接觸於内筒外壁面與筒身内壁 ' 面，而於該内筒内部設置有一可上下滑動之油壓活塞；阻 尼油係流動於該内筒與該容室，並受浮動活塞阻隔；氣體 係充填於該容室内受浮動活塞阻隔；據此，該浮動活塞平 衡阻尼油與氣體之壓力值。 【新型内容】 上述所揭結構中，前者係將浮動活塞組設於缸轴上， M406117 且該浮動活塞與閥座及固定活塞之間分別區隔形成第一油 室及氣室；後者則是將浮動活塞組設於内筒外壁面與筒身 内壁面之間，且該浮動活塞於容室中區隔出二容室分別充 填有阻尼油與氣體。 惟，該活塞無論係組設於缸軸（軸桿）上，或係組設於 兩筒（管件）之間，由於該活塞内、外徑之環槽係呈同一平 , 面設置，當活塞受力滑動時，各該環槽均係各自呈直線受 φ 力，容易造成該活塞產生傾斜與縫隙，影響密封效果，而 使二容室間之氣體或油體經由縫隙而進入另一容室中，造 成二容室間之氣體或油體產生污染，而嚴重影響壓力缸之 作動，且各該内、外徑之環槽間具有一定的間距，而無法 再縮減外徑，以致無法應用於小徑的壓力缸規格中，整體 結構確有待改良之必要者；故本創作人，針對前述問題進 一步提供一具實用創新之壓力缸之活塞結構。 ' (解決問題之技術手段） 有鑑於此，本創作所揭露之壓力缸之活塞結構，其包 含有：一作動桿，其一端係穿設該壓力缸並組設有一閥座； 一活塞本體，係呈中空圓柱狀，該活塞本體係組設於該作 動桿上且設於該壓力缸内部，該活塞本體内、外徑分別貼 觸於該壓力缸之内壁面以及該作動桿之外壁面，且可於壓 力缸内滑動，藉該活塞本體於該壓力缸内部與閥座間區隔 M406117 出二容室，該活塞本體内、外徑分別設有至少一環槽，各 該環槽係呈反向且呈軸向層疊設置，各該環槽之内緣軸向 切線間具有一間距，於各該環槽内分別組設有一密封件； 藉由上述構件，該活塞本體内、外徑之各該環槽呈層疊狀， 且各該環槽内緣之間距可最小化，可減少該活塞本體之外 徑，且可提升整體結構強度，整體結構可達便利實用性者。 ^ (對照先前技術之功效） 本創作目的之一即在提供一種壓力缸之活塞結構，係 於活塞本體内、外徑設有複數環槽，各該環槽内設有密封 件，内、外徑之各該環槽係呈反向層疊交錯設置，使該活 塞本體内、外徑間可有效抵抗直線受力，而不易產生傾斜， 避免氣體或油體滲透污染之情事，則達極佳創新實用性者。 本創作目的之二即在提供一種壓力缸之活塞結構，各 該環槽之内緣於層疊部位間具有間距，該間距係大於0， ® 可將該間距最小化，有效減少該活塞本體之外徑與重量， 且達提升整體結構強度之功效者。 本創作目的之三即在提供一種壓力缸之活塞結構，各 該環槽與密封件間係可設有一墊圈，該墊圈、密封件與活 塞本體間係呈不同之相對硬度設計，可保護該密封件避免 產生過度變形，以達增進密封之效果者。 M406117 【實施方式】 首先請參照第-〜四圖，本創作所提供之—種壓力缸 之活塞結構，其主要包含有：1力缸（⑻、—作動样 (20)、及一活塞本體（3〇)。 該壓力缸（10)，其内部容設有一緩衝件（ιι)。 祕動桿⑽，其—端係穿設_纽⑽並組設有 、 一閥座（21) ’且該閥座（21)係抵貼該緩衝件〇1)。 鲁 該活塞本體（30)，係呈中空圓柱狀且具有一軸孔 (31)，該活塞本體（30)藉轴孔（31)套設於該作動桿（2〇) 上，使該活塞本體（30)内、外徑分別貼觸於該作動桿（2〇) 之外壁面以及該壓力缸（1〇)之内壁面，且該活塞本體（3〇) 係可於壓力缸（10)内滑動’藉該活塞本體（3〇)於該壓力缸 (10)内部與閥座（21)間區隔出一第一容室（12)及一第二容 室（13)，於各該第一、第二容室（12)(13)中可容設有氣體、 # 油體或彈性體，或係可分別容設有氣體與油體而成氣油壓 複合式之容室，或係可分別容設有氣體或油體與彈性體而 成之複合式容室；該活塞本體（3〇)内、外徑分別凹設有至 少一環槽’於本實施例中，其係於該活塞本體（30)内側徑 向凹設有一第一環槽（32) ’且於該活塞本體（30)外側遠離 第^一環槽（32)之一端徑向凹設有一第一％•槽（33) ’各該第 一、第二環槽（32)(33)係呈反向且間隔層疊交錯設置’其 中，該第一環槽（32)内側具有與軸孔（31)平行之一第一内 M406117 緣（321)，且該第二環槽（33)内側具有與轴孔（31)平行之一 第二内緣（331)，則各該第一、第二内緣（321)(331)間呈平 行且分別軸向設有一切線（L1)(L2)，且各該第一、第二内 緣（321)(331)於層疊交錯之部位間形成有一間距（XI)，並 且該間距（XI)之係大於0，再者，各該第一、第二環槽 (32)(33)之中心點分別徑向設有一延伸線（322)(332)，且 ， 各該延伸線（322)(332)間具有適當之一距離（X2);各該第 • 一、第二環槽（32)(33)内分別組設有一密封件（40)，其中 該密封件（40)係為一圓形墊圈，以供阻隔各該第一、第二 容室（12)(13)中之氣體、油體或彈性體。 藉由上述構件’該活塞本體（30)内、外徑分別設有若 干環槽’各該環槽係呈反向間隔層疊設置，提供該活塞本 體（30)内、外徑可有效抵抗直線受力，而不易產生傾斜， 避免容室間氣體或油體滲透污染之情事，且各該環槽之内 鲁緣於層疊部位間具有適當間距（XI)，玎達降低該活塞本體 (30)之外徑與減輕重量之功效，並可提升整體結構強度， 故整體結構極具實用便利性者。 為供進一步瞭解本創作構造特徵、運用技術手段及所 預期達成之功效，茲將本創作使用方式加以敘述如下： 本創作之組設’係將作動桿（20)之一端穿設該壓力缸 do)並與閥座（21)組接，接著將該活塞本體（30)套設於該 , 作動桿（20) ’藉該活塞本體（30)於壓力缸（10)内部與閥座 8 M406117 (21)間區隔出各該第一、第二容室（12)(13)，即組設完成。 請參照第五〜六圖所示，係為本創作之第二實施例， 其中’該活塞本體（30)於第二環槽（33)之一端係可據以延 伸’且於内侧徑向凹設有一第三環槽（34)，該第三環槽（34) 内部設有一密封件（40)，而使該活塞本體（30)可依需求延 伸適當高度’且於内、外徑分別設具有複數環槽，以達創 ， 意延伸設置之功效；於本實施例中，係於各該第一、第三 • 環槽（32)(34)内設有圓形墊圈狀之該密封件（4〇)，並可於 該第二環槽（33)内設有矩形墊圈狀之一密封件（41)，以達 創意組設且具實用性之功效者。 請參照第七〜八圖所示，係為本創作之第三實施例 圖，其中，各該密封件（40)與第一、第二環槽（32)(33)相 對二端壁面之間分別設有扁平狀之一墊圈（42)，該墊圈（42) 之硬度係小於該密封件（40)之硬度，且該密封件（40)之硬 • 度係小於該活塞本體（30)之硬度；或者，各該墊圈（42)之 硬度係大於該密封件（40)之硬度，且各該墊圈（42)之硬度 係小於該活塞本體（30)之硬度，藉各該密封件（40)、墊圈 (42)與活塞本體（30)間不同之相對硬度設計，可保護該密 封件（40)避免產生過度變形，以增進其密封效果。 本創作之該活塞本體（30)，係於其内、外徑分別設有 各該第一、第二環槽（32)(33)，於各該第一、第二環槽 (32)(33)内部分別設有一密封件（40)，内、外徑之各該第 9 M406117 一、第二環槽（32)(33)係呈反向層疊交錯設置，各該第一、 第二環槽（32)(33)中心點之延伸線（322)(332)間具有適當 長度之距離（L2)，使該活塞本體（30)内、外徑可有效抵抗 直線受力，而不易產生傾斜，避免容室中氣體或油體滲透 污染之情事，確實提供於該壓力缸（10)内傳遞壓力之效 果；再者，各該第一、第二環槽（32)(33)之内緣於層疊部 ， 位間具有間距（XI)，該間距（XI)係大於〇，即可將該間距 • (XI)縮減至最小值，可改善習知活塞結構内、外徑各該環 槽間具有一定間距而無法縮減外徑之缺弊，有效減少該活 塞本體（30)之外徑與重量，使該活塞本體（30)可據以應用 於小徑之壓力缸（10)規格中，且由於該活塞本體（30)之外 徑可減少，配合各該環槽間具有適當距離（X2)且呈層疊 狀’有效提升整體結構之強度，則達極佳實用性及便利性 者。 鲁 本創作可於各第一、第二環槽（32)(33)與密封件 (40)(41)二端之間分別設有該墊圈（42)，藉該墊圈（42)、 各該密封件（40)(41)與活塞本體（30)間不同之相對硬度設 計，可保護各該密封件（40)(41)避免產生過度變形，以增 進密封效果者。 綜合上述’本創作所揭露之「壓力缸之活塞結構」，係 提供一具反向層疊設置有複數環槽之活塞結構，該活塞本 體（30)内、外徑分別設有複數反向層疊交錯之環槽，各該 M406117 環槽内部設有密封件（40)，且各該環槽之内緣於層疊部位 之轴向切線間具有間距（XI)，並且各該環槽中心點之延伸 線間具有一定長度之距離（X2)，可減少該活塞本體（30)之 外徑與重量，並有效提升整體結構強度，同時避免產生傾 斜滲透之情事，俾使整體確具產業實用性及創新效益，且 其構成結構又未曾見於諸書刊或公開使用，誠符合新型專 利申請要件，懇請鈞局明鑑，早日准予專利，至為感禱。 需陳明者，以上所述乃是本創作之具體實施例及所運 用之技術原理，若依本創作之構想所作之改變，其所產生 之功能作用仍未超出說明書及圖式所涵蓋之精神時，均應 在本創作之範圍内，合予陳明。 M406117 【圖式簡單說明】 第一圖為本創作一較佳實施例之立體外觀與局部剖視圖 第二圖為本創作一較佳實施例之立體分解示意圖。 第三圖為本創作一較佳實施例之組合剖視圖。 第四圖為本創作一較佳實施例活塞本體之局部剖視圖。 第五圖為本創作第二實施例活塞本體之立體分解圖。 第六圖為本創作第二實施例之組合剖視圖。 第七圖為本創作第三實施例活塞本體之立體分解圖。 第八圖為本創作第三實施例之組合剖視圖。 明 說 } \—/ \)y \)y 1i 穿 2 0 2)34 ^ ) 1 ^ 3 3 2 3 3) ^ο Γν ο Γν 2 χ(\ χ(\ 1 0#^)1)1)(1室(2體槽(3緣槽(4 ι-πΜα(χ缸容桿本環線内環件 Μ Μ線距力一動塞一伸二三封 t(4切間壓第作活第延第第密 切線（L2) 距離（X2) 緩衝件（11) 第二容室（13) 閥座（21) 軸孔（31) 第一内緣（321) 第二環槽（33) 延伸線（332) 密封件（40) 墊圈（42) 12M406117 V. New description: [New technical field] This creation is about a piston structure of a pressure cylinder, especially a structure that can increase the structural strength and reduce the outer diameter of the piston body. [Prior Art] The inside of the pressure cylinder is provided with a piston whose outer diameter is approximately equal to the inner diameter of the pressure cylinder, Λ φ and the pressure cylinder is divided into two chambers, and the two chambers can be respectively set to pneumatic pressure and oil pressure. Or gas-oil pressure composite, the piston can slide in the pressure cylinder, its main function is to change the volume enclosed by the pressure cylinder, or to transfer the pressure exerted by the gas or oil body in the pressure cylinder, so the design of the piston structure, Pressure transmission has a great impact. Generally, the piston system has a hollow cylindrical shape, and a ring groove is respectively arranged in the inner and outer diameters of the piston, and a sealing member is respectively disposed inside each ring groove, so that the piston group is disposed inside the pressure cylinder and is separated by two. The chamber, and the piston system is actuated relative to the displacement of the pressure cylinder to provide a practical effect of transmitting pressure. The position of the piston is generally divided into a shaft and a pipe. According to the conventional structure, the piston structure is provided on the shaft, and the structure of the external shock absorber of the bicycle frame is disclosed in the new patent No. 092204057. The shock absorber is provided with an outer tube body. The outer tube body has an open end at one end and a closed end at the other end; wherein a hydraulic cylinder 3 M406117 body is disposed at the open end, and the hydraulic cylinder body extends into the outer tube body to be an open end. The fixed part is fixed to the fixed part, and the other end is extended outside the outer tube. The closed end of the outer tube is fixed with a cylinder shaft extending through the center of the fixed piston and extending into the hydraulic cylinder. The valve seat is fixed in the hydraulic cylinder, and the valve seat is provided with a valve hole, and the valve hole faces the closed end of the hydraulic cylinder to have a valve plate, and the valve seat will be the inner part of the hydraulic cylinder Separating the first oil chamber and the second oil chamber, the end facing the closed end of the outer tube is a first oil chamber; a floating piston is disposed between the fixed piston and the valve seat in the first oil chamber, and the floating piston A gas chamber having a gap is formed between the fixed piston and the fixed piston. Another known structure of a piston between the tubular members, such as the "oil and gas separation shock absorber structure" disclosed in the Japanese Patent No. 099209955, includes a tubular body and an inner cylinder axially disposed in the cylinder body, and At the same time, the upper end cover and the lower end cover of one end of the inner tube and the inner tube are closed, and a space is arranged between the inner tube and the barrel, the chamber is communicated with the inner tube, and the chamber is provided with a a sliding piston that slides down and contacts the outer wall surface of the inner cylinder and the inner wall of the cylinder body, and a hydraulic piston that can slide up and down is disposed inside the inner cylinder; the damping oil flows in the inner cylinder and the chamber, and Blocked by the floating piston; the gas system is filled in the chamber and blocked by the floating piston; accordingly, the floating piston balances the pressure value of the damping oil and the gas. [New content] In the above-mentioned structure, the former is a floating piston set on the cylinder shaft, M406117 and the floating piston and the valve seat and the fixed piston are respectively separated to form a first oil chamber and a gas chamber; the latter is The floating piston group is disposed between the outer wall surface of the inner cylinder and the inner wall surface of the cylinder body, and the floating piston is filled with the damping oil and the gas respectively in the middle chamber of the chamber. However, the piston is assembled on the cylinder shaft (shaft) or is disposed between the two cylinders (tubes). Since the inner and outer diameter ring grooves of the piston are flush, the surface is arranged as the piston. When the force is sliding, each of the ring grooves is linearly subjected to a φ force, which easily causes the piston to have a tilt and a gap, which affects the sealing effect, and allows the gas or oil body between the two chambers to enter another chamber through the gap. In the process, the gas or oil body between the two chambers is polluted, which seriously affects the operation of the pressure cylinder, and the inner and outer diameter ring grooves have a certain spacing, and the outer diameter cannot be reduced, so that it cannot be applied. In the specification of the small-diameter pressure cylinder, the overall structure does need to be improved; therefore, the creator further provides a practical and innovative piston structure of the pressure cylinder for the aforementioned problems. In view of the above, the piston structure of the pressure cylinder disclosed in the present invention comprises: an actuating rod, one end of which is disposed through the pressure cylinder and is provided with a valve seat; a piston body, The piston system is disposed on the actuating rod and is disposed inside the pressure cylinder. The inner and outer diameters of the piston body are respectively in contact with the inner wall surface of the pressure cylinder and the outer wall surface of the actuating rod. And sliding in the pressure cylinder, the piston body is separated from the valve seat by the M406117, and the piston body has at least one ring groove in the body and the outer diameter, and each ring groove is reversed. And axially stacked, each of the annular grooves has a spacing between the axial tangents, and a sealing member is respectively disposed in each of the annular grooves; and the inner and outer diameters of the piston body are respectively The ring grooves are stacked, and the distance between the inner edges of the ring grooves can be minimized, the outer diameter of the piston body can be reduced, and the overall structural strength can be improved, and the overall structure can be convenient and practical. ^ (Compared with the efficacy of the prior art) One of the purposes of the present invention is to provide a piston structure of a pressure cylinder, which is provided with a plurality of ring grooves in the inner and outer diameters of the piston body, and each of the ring grooves is provided with a sealing member, inside and outside. Each of the ring grooves is arranged in a reverse stack, so that the piston body can effectively resist the linear force between the body and the outer diameter, and it is not easy to produce inclination, and the gas or oil body is prevented from penetrating the pollution, and the innovation is excellent. Practicality. The second object of the present invention is to provide a piston structure of a pressure cylinder, wherein the inner edge of each annular groove has a spacing between the lamination portions, and the spacing is greater than 0, and the spacing can be minimized, thereby effectively reducing the outer portion of the piston body. Diameter and weight, and the effect of improving the overall structural strength. The third purpose of the present invention is to provide a piston structure of a pressure cylinder, and a gasket can be disposed between each ring groove and the sealing member, and the gasket, the sealing member and the piston body have different relative hardness designs to protect the seal. The piece avoids excessive deformation to improve the effect of the seal. M406117 [Embodiment] First, please refer to the figure -4, the piston structure of the pressure cylinder provided by this creation mainly includes: 1 force cylinder ((8), - actuation sample (20), and a piston body ( 3〇). The pressure cylinder (10) is internally provided with a cushioning member (ι). The secret rod (10), the end of which is provided with a _new (10) and is assembled, a valve seat (21) 'and The valve seat (21) abuts against the cushion member 〇 1). The piston body (30) has a hollow cylindrical shape and has a shaft hole (31), and the piston body (30) is sleeved on the actuating rod (2〇) by a shaft hole (31), so that the piston body ( 30) The inner and outer diameters respectively touch the outer wall surface of the actuating rod (2〇) and the inner wall surface of the pressure cylinder (1〇), and the piston body (3〇) is slidable in the pressure cylinder (10) 'By the piston body (3〇), a first chamber (12) and a second chamber (13) are separated from the valve seat (21) inside the cylinder (10), respectively. The second chamber (12) (13) may be provided with a gas, an oil body or an elastomer, or may be respectively provided with a gas and oil body to form a gas-oil composite chamber, or may be a composite chamber formed by a gas or an oil body and an elastic body respectively; the inner and outer diameters of the piston body (3 〇) are respectively recessed with at least one annular groove ′ in the embodiment, which is attached to the piston body (30) The inner annular recess is provided with a first annular groove (32)' and a first % groove (33) is radially recessed from one end of the piston body (30) away from the one end of the first annular groove (32). Each of the first, The second annular groove (32) (33) is reversely arranged in a staggered arrangement, wherein the inner side of the first annular groove (32) has a first inner M406117 edge (321) parallel to the axial hole (31), The inner side of the second annular groove (33) has a second inner edge (331) parallel to the axial hole (31), and the first and second inner edges (321) (331) are parallel and respectively respectively. A line (XI) is formed between the portions of the first and second inner edges (321) (331) which are interlaced and staggered, and the pitch (XI) is larger than the line (L1) (L2). 0. Further, an center line of each of the first and second ring grooves (32) (33) is respectively provided with an extension line (322) (332), and between the extension lines (322) (332) Having a suitable distance (X2); each of the first and second ring grooves (32) (33) is respectively provided with a sealing member (40), wherein the sealing member (40) is a circular washer. For blocking the gas, oil body or elastomer in each of the first and second chambers (12) (13). By means of the above-mentioned member, the inner and outer diameters of the piston body (30) are respectively provided with a plurality of annular grooves, each of which is arranged in a reverse interval, so that the inner and outer diameters of the piston body (30) can effectively resist straight lines. Force, not easy to produce inclination, to avoid the gas or oil body penetration and contamination between the chambers, and each of the ring grooves has a proper spacing (XI) between the laminated portions, and the piston body reduces the piston body (30) The outer diameter and weight reduction effect, and can improve the overall structural strength, so the overall structure is very practical and convenient. In order to further understand the characteristics of this creation, the use of technical means and the desired effect, the use of this creation is described as follows: The set of this creation is to put the pressure cylinder on one end of the actuating rod (20). And being assembled with the valve seat (21), and then the piston body (30) is sleeved thereon, the actuating rod (20) 'by the piston body (30) inside the pressure cylinder (10) and the valve seat 8 M406117 ( 21) The first and second chambers (12) (13) are separated from each other, that is, the assembly is completed. Please refer to the fifth to sixth figures, which is a second embodiment of the present invention, wherein 'the piston body (30) is extended at one end of the second ring groove (33) and is radially concave on the inner side. A third ring groove (34) is disposed, and a sealing member (40) is disposed inside the third ring groove (34), so that the piston body (30) can be extended to an appropriate height according to requirements, and the inner and outer diameters are respectively set. The utility model has a plurality of ring grooves for achieving the effect of extending the setting; in the embodiment, the sealing member is provided with a circular washer in each of the first and third ring grooves (32) (34). (4〇), and a rectangular washer-like seal (41) can be arranged in the second ring groove (33) for creative composition and practical effect. Please refer to the seventh embodiment of the present invention, which is a third embodiment of the present invention, wherein each of the sealing member (40) is opposite to the first and second ring grooves (32) (33) between the two end walls. Each of the flat gaskets (42) is provided, the hardness of the gasket (42) is less than the hardness of the sealing member (40), and the hardness of the sealing member (40) is smaller than that of the piston body (30). Hardness; or, the hardness of each of the washers (42) is greater than the hardness of the seal (40), and the hardness of each of the washers (42) is less than the hardness of the piston body (30), by means of the seals (40) ), the relative hardness design between the washer (42) and the piston body (30) can protect the seal (40) from excessive deformation to enhance its sealing effect. The piston body (30) of the present invention is provided with the first and second ring grooves (32) (33) respectively in the inner and outer diameters of the first and second ring grooves (32) ( 33) a sealing member (40) is respectively disposed inside, and the ninth M406117 one and the second ring groove (32) (33) of the inner and outer diameters are arranged in a reverse stack, and the first and second rings are respectively arranged. The extension line (322) (332) of the center point of the groove (32) (33) has a suitable length (L2), so that the inner and outer diameters of the piston body (30) can effectively resist the linear force, and the inclination is not easy. To avoid the infiltration of gas or oil in the chamber, it is indeed provided in the pressure cylinder (10) to transmit pressure; further, the inner edges of each of the first and second ring grooves (32) (33) In the lamination portion, there is a spacing (XI) between the spaces, and the spacing (XI) is greater than 〇, and the spacing (XI) can be reduced to a minimum value, which can improve the inner and outer diameters of the conventional piston structure. The disadvantage of having a certain distance and not being able to reduce the outer diameter, effectively reducing the outer diameter and weight of the piston body (30), so that the piston body (30) can be applied to the pressure of the small diameter (10) In the specification, since the outer diameter of the piston body (30) can be reduced, and the appropriate distance (X2) between the ring grooves is formed, and the laminated shape is used to effectively increase the strength of the overall structure, the utility is excellent. And convenience. Ruben creates the gasket (42) between each of the first and second ring grooves (32) (33) and the sealing member (40) (41), by means of the gasket (42) The relative hardness design between the seal (40) (41) and the piston body (30) can protect each of the seals (40) (41) from excessive deformation to enhance the sealing effect. In combination with the above-mentioned "piston structure of a pressure cylinder" disclosed in the present invention, a piston structure in which a plurality of annular grooves are provided in a reverse stack is provided, and the inner and outer diameters of the piston body (30) are respectively provided with complex reverse stacking The ring groove, each of the M406117 ring grooves is provided with a sealing member (40), and the inner edge of each ring groove has a spacing (XI) between the axial tangent lines of the laminated portion, and an extension line of the center point of each ring groove The distance between the length (X2) can reduce the outer diameter and weight of the piston body (30), and effectively improve the overall structural strength, while avoiding the situation of oblique penetration, so that the whole industry has practical and innovative benefits. And its structure has not been seen in the publications or public use, in line with the requirements of the new patent application, please ask the Bureau to understand the patent, as soon as possible to grant patents, to pray. To be clear, the above is the specific embodiment of the creation and the technical principles applied. If the changes made according to the concept of this creation, the functional role produced by it does not exceed the spirit of the manual and the drawings. At the time, it should be combined with Chen Ming within the scope of this creation. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a perspective view and a partial cross-sectional view of a preferred embodiment of the present invention. The second figure is a perspective exploded view of a preferred embodiment of the present invention. The third figure is a combined cross-sectional view of a preferred embodiment of the present invention. The fourth figure is a partial cross-sectional view of the piston body of a preferred embodiment of the present invention. The fifth figure is an exploded perspective view of the piston body of the second embodiment of the present invention. The sixth drawing is a combined sectional view of the second embodiment of the creation. The seventh figure is an exploded perspective view of the piston body of the third embodiment of the present invention. Figure 8 is a cross-sectional view showing the combination of the third embodiment of the creation. Ming said} \—/ \)y \)y 1i wear 2 0 2)34 ^ ) 1 ^ 3 3 2 3 3) ^ο Γν ο Γν 2 χ(\ χ(\ 1 0#^)1)1)( 1 room (2 body slots (3 yokes (4 ι-πΜα (χ 容 容 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 Μ Μ Μ Μ Μ Μ Μ Μ Μ Μ Μ 4 4 4 4 4 4 4 4 4 4 4 4 Close line (L2) Distance (X2) Buffer (11) Second chamber (13) Seat (21) Shaft hole (31) First inner edge (321) Second ring groove (33) Extension line (332) Seal (40) Washer (42) 12