M327912 八、新型說明·· 【新型所屬之技術領域】 本創作係指一種適用於可活動的傢倶之液壓缸(二），其活塞桿縮 .回缸壁内之滑移動作具有平順之緩衝功能，而當活塞桿伸出缸壁時可 • \確定的以較小阻力、較快之速度向後滑移，並藉由避震裝置具有避震 ' 功能與降低噪音之優點。 【先前技術】 按美國第US6, 615, 450B2號專利案件乃揭露了適用在傢倶門或 者抽屜的減緩沖缸(液壓缸），唯經查該案之活塞桿向前滑移時(即縮 1〇回缸壁内時)雖可藉由壓縮彈簧來增加阻力，然而當_彈酱之距離 太長容紐移獨狀缺失，毅妓塞桿配合科之歸復力量 向後滑移c即伸出虹壁時财藉由擠壓高_性的彈性材料製成的 管狀體部位(tUbe-section-like㈣來達到降低噪音之功能；唯經 查其避震效果則較差。 •本解者乃有鑑於此，經過*斷的研究與改進，終於創作設計注 一種適用於可活動的傢倶之液壓缸(二）。 是以本創叙主要目的乃在於提供—種翻於可 液壓缸(二），其活塞桿__之缸____^ 阻力滑移，而達到平穩順暢的緩衝功能。 本創作之次-目的乃在域供— 動 虹㈡’當活塞桿伸出師倾向後滑了移==壓 20 M327912 =作之又-目的乃在於提供—種_於可活細傢俱之液壓 紅，其活塞至少設有-薄彈性片，當活塞捍縮回紅壁之後，活塞承受 ‘之阻力小於細Μ之彈性恢復力量時，薄彈性片之小突部可突出於 .5.其後端面，進而可較與剛性閥塊形成間距，令活塞桿可以較少之阻 ， 力較快之速度伸出缸壁。 【新型内容】 ^ —種適用於可活動的傢俱之液壓叙㈡，其活塞桿前側樞設可活 動之剛性f親以及可活_活塞，#活塞觸_缸本體之紅壁内而 W向前滑移時可讀姐力滑移，而達到平穩順暢的緩衝魏，而當活 塞桿伸_林狀缸獅向錄㈣，可以較少往力較快之速产 滑移，並藉由前裝置達_震魏與降㈣音之伽，且該活塞: 少設有-薄彈性片，當活塞桿縮回缸壁之後，活塞承受之阻力小於薄 彈性片之彈性恢復力量時，薄彈性片之小突部可突出於其後端面，進 •而可確定與剛性閥塊形成間距，令活塞桿可以較少之阻力較快之速度 伸出缸壁。 又 茲配合圖式詳加說明如后。 【實施方式】 如圖-〜圖九所示，本創作-種適用於可活動的傢倶之液壓缸 20 (二），係包括有·· 壓紅本體⑴，其缸壁⑻之测與後姆為開放觀，該叙壁⑴） 則可供設有s塞⑸之絲桿⑷直齡贿移，其前侧口端 6 M327912 (111)(參考圖七）可供狀阻鎌(縣封再贿音波或其他方式 與前蓋(2)連結固定； 刖蓋（2) ’係連結於壓缸本體（D之前侧開口端（ηι)(參考圖三、圖 •七）； •5·缸蓋(3)，係連結於壓缸本體（1)之後侧開口端（112)，並具有可供活 、 塞桿(4)之桿體Wl)穿過的軸孔(31)，該缸蓋(3)係以超音波或其他 方式連結固定； 春活塞桿⑷，係桿體(41)前侧具有較小軸徑部位(4⑴以供緊迫固定一 剛性閥塊(6)並樞設可活動之活塞(5)，令該剛性閥塊(6)位於活塞 10 (5)之後侧並相互形成間距，該較小軸徑部位(411)並具有位於其前 侧的疋位凹溝(41Π)可供嵌設一擔件(412)，該播件(412)並相鄰該 活塞桿(4)所設之活塞(5); 活塞(5)，係具樞槽（50)樞設於活塞桿(41)之前侧，其外徑略小於壓 缸本體（1)之缸壁（11)的内徑，並以塑膠材質為較佳，該活塞(5)乃 _ 設有數軸向通孔(51)以及突出於其後端面的數導塊(52)，其各導塊 (52)係分別導入剛性閥塊(6)之導槽(61)，令活塞(5)可前後直線位 移但不能旋轉，且該活塞(5)並至少進一步設有一槽孔(54)(另參考 圖六、圖九)以至少形成一薄彈性片（55)，該薄彈性片（55)並具有突 出於活塞(5)之後端面的小突部(551); 2〇剛性閥塊(6)，係樞設於活塞桿⑷呈可活動狀態，並恰位於活塞⑸ 之後侧，其外徑較小於壓缸本體（1)之缸壁（11)的内徑，並與缸壁 (11)之間形成較大之間隙，該剛性閥塊(6)乃設有數導槽(61)(參考 M327912 圖一、圖六），各導槽(61)可供活塞(5)之導塊(52)導入，另外該剛 性閥塊(6)另設有數個軸向通孔(62)，且各軸向通孔(62)係與活塞 (5)之數個軸向通孔(51)的其中之部份軸向通孔(51)相面對； - 藉由前述構件之組成，當活塞桿(4)伸出缸壁（11)而向後滑移 • \時，承受阻尼液之阻力的活塞(5)可藉其各導塊(52)之導引而向前滑 …移，令該活塞(5)之前端係可被活塞桿(4)所設擋件(412)所止擋，而 活塞(5)之後端（53)則藉其各薄彈性片（55)的小突部（551)可保持與 籲剛性閥塊(6)之間形成間距（參考圖五），進而令阻尼液可由剛性閥塊 (6)之各軸向通孔（62)或剛性閥塊(6)與缸壁（n)之間的間隙經由該 ίο剛性閥塊（6)與活塞（5)之間形成的間隙通過活塞（5)之各軸向通孔 (51)向前流動，而令活塞桿與其所設活塞(5)、剛性閥塊(6)可以 較少阻力、較快之速度向後滑移；又當活塞桿(4)縮回缸壁（丨丨）内而 向則滑移時’活塞⑸承受阻尼液之阻力，而令活塞⑸可抵靠剛性闕 塊(6)之前端，且同時可令活塞(5)之各薄彈性片（55)的小突部（551) _ •可被擠壓入槽孔(54)内（參考圖八），相對令活塞桿⑷連同活塞⑸、 •剛性_(6)可承受較大之阻力雜慢之速度緩緩㈣滑移，而具有 缓衝作用，而當活塞捍(4)向前滑移而縮回缸壁（11)内之後，活塞(5) ’承受之阻力小树述轉邮⑽之雜恢復力料，料性片⑽ 可恢復原狀，令其小突部⑽）突出於活塞⑸之後端面（參考圖六）， 2〇進而可確定活塞⑸與剛性閥塊⑹之間形成間距，令活塞桿⑷欲連 同其所設活塞⑸、剛性閥塊⑹向後滑移時能確定可以較少阻力向後 滑移，相對亦令活塞桿⑷能以較快之速度伸出紅壁(11);舉例來說， 8 M327912 如果本創作之壓缸本體⑴係固定在抽履滑軌之外滑軌( 圖未示），而 活塞桿⑷的後侧(44)則係可被内滑轨(圖未示)連動，當内滑執連同 活塞桿⑷向後滑移時可以較少之阻力、較快之速度向後滑移，反之， .當内滑軌連同活塞桿⑷向前滑移咖阻力較大，相對可以較慢之速 .5·度緩缓向前滑移’而令内滑轨連同其連結之抽展向後滑移具有緩衝功 * 能。 再者’前侧_塊⑹之後侧⑽係成錐狀_斜狀，當其連 #同活塞桿(4)被向後滑移時可減少阻力，而該剛性闕塊⑹之各轴向通 孔(62)則係為前侧之孔徑較小後侧孔徑較大，令阻尼液由前向後通過 1〇時之速度較快且限力較小，而阻尼液由後向前流時則速度較慢阻力較 大。 另者，則述適用於可活動的傢倶的液壓缸可進一步增設避震裝 置，該避震裝置係包括有·· " 避震墊(9)，係採用橡膠材質，乃係為一具軸向槽孔⑽）的空心殼體 籲（91) ’該軸向槽孔(911)並可被活塞桿⑷之桿體⑷）穿過，而該空心 殼體(91)並具有位於後側之環形部(912)、自該環形部(912)向前延伸 之較大外桎部位(913)以及自該較大外徑部(犯3)向前延伸之緩衝部 (914)，該緩衝部(914)之直徑係較小於該較大直徑部（gig)，其中該 環形部(912)係可嵌套入缸蓋(3)所進一步配合設置的環形槽(32)，且 20 令較大外徑部位(913)的後端面（9131)相鄰缸蓋(3)之前端面（33)，該 缓衝部（914)並具有外徑較小之緊迫段(9141)，且該前述軸向槽孔 (911)之位於緊迫段(9141)的相對部位(9111)(參考圖三、圖五）之孔 M327912 徑係略小於活塞桿(4)之桿體(41)的直徑，令活塞桿(4)之桿體(41) 欲穿過該相對部位(9111)時需先撐開該相對部位(91Π)再穿過，相對 亦令活塞桿(4)之桿體(41)與該緩衝部(914)之緊迫段(9141)具有較 ^ 佳之密合性，以避免阻尼液滲入軸向槽孔(911)内； • \定位座(8)，係為具軸向槽孔(81)之空心殼體，其後端面（82)係抵靠 .於避震墊(9)之較大外徑部位（913)的前端面（9132)，而其前端面 (83)則抵靠壓缸本體（1)之缸壁（11)接近於後段部位所設定位凹緣 • (113)，而該定位座（8)之軸向槽孔(81)則係由前向後呈由寬漸窄之 狀態，且該定位座（8)之軸向槽孔(81)與避震墊(9)之空心殼體(91) 10 的緩衝部（914)之間並形成間距(參考圖五），以利於避震墊(9)之緩 衝部(914)被向後壓縮，另外其定位座(8)之後端面（82)係可進一步 設有數尖狀體(821)(參考圖一、圖五）可供嵌***避震墊③)之空心 殼體(91)的較大外徑部位(913)之前端面（9132)内部而增加定位效 果； 參 藉由前述構件組成之避震裝置，當活塞桿(4)之桿體(41)伸出缸 •壁(1”時，活塞桿⑷可以較小之阻力、較快之速度向前滑移，一直 到活塞桿⑷所連結之剛性閥塊⑹滑移至缸壁（⑴的後段部位時，即 可藉剛性_⑹向後壓縮雜墊⑼，而進—步達職佳之避震功能 與降低噪音之優點。 20 踩上所述，本創作可歸納具有下列增進功效： 1.活塞桿(4)縮回壓缸本體（1)之缸壁(11)内而向前滑移時可以較大 阻力滑移’而翻平穩觀的缓衝功能。 M327912 2·活塞桿⑷伸出壓缸本體⑴之虹壁⑻而向後滑移時，可以較少之 阻力較快之速絲移震裝置_避震雜絲低澡音之 優點。 -3.活塞⑸至少設有—㈤，#活塞桿⑷獅缸壁⑴）之 ，後，活塞⑸承受之阻力小於薄彈性片㈤之彈性恢復力量時，薄 '彈性月⑽之小突部_可突出於其後端面，進而可確定與職 _⑹形觸距，令活塞捍⑷可_少樣力触之速 •壁(11)。 疋以’本案創作乃確具其實用增進功效，乃謹以新型專利申請 10之，懇請鲜局貴審查委員予以詳查並賜准專利，至感德便。 惟’以上:述者僅為本創作之較佳實施例而已，當不能以之限定 j作a之犯圍’舉凡依本創作申請專利範圍所作之均等變化與修 飾白應仍屬本創作涵蓋之專利範圍内。 【圖式簡單說明】 圖-係本創作實施例之立體分解圖。 圖一係本創作實施例之立體圖。 圖三係本創作實施例之另一角度立體分解圖。 圖四係本創作實施例之另一角度立體圖。 圖五係本創作實施例其中剛性閥塊與活塞形間距時之斷面示意圖。 20圖六係本創作實施例其中剛性闕塊與活塞形間距時之另-角度部份 斷面示意圖。 圖七係本創作實施燃巾__前端被活塞抵靠時之斷面示意圖。 11 M327912 圖八係本創作實施例其中剛性閥塊前端被活塞抵靠時之另一角度部 份斷面示意圖。 圖九係本創作實施例其中活塞之立體放大圖。 Λ【主要元件符號說明】 • 5- (1)壓缸本體（11)缸壁（111)(112)開口端（113)定位凹緣⑵前蓋 ，（3)缸蓋（31)軸孔（32)環形槽（33)(83)(9132)前端面（4)活塞桿 (41)桿體（411)較小軸徑部位（4ΐπ)定位凹溝（412)擋件（44)後 •侧（5)活塞（50)樞槽（51)(62)軸向通孔（52)導塊（53X64)後端 (54)槽孔（55)薄彈性片（551)小突部（6)剛性閥塊（61)導槽（8) ⑺疋位座（81)(911)軸向槽孔（82)(9131)後端面（821)尖狀體（9)避 震墊（91)空心殼體（9Π1)相對部位③12)環形部（913)較大外徑 部位（914)緩衝部（9141)緊迫段 12M327912 VIII. New Description·· 【New Technical Fields】 This creation refers to a hydraulic cylinder (2) suitable for movable furniture. The piston rod is retracted and returned to the cylinder wall for smooth cushioning. When the piston rod extends out of the cylinder wall, it can be determined to slide backward with less resistance and faster speed, and the shock absorber has the advantages of shock absorber function and noise reduction. [Prior Art] According to U.S. Patent No. 6,615,450 B2, the case of a buffer cylinder (hydraulic cylinder) for a home door or a drawer is disclosed, and only when the piston rod of the case is slipped forward (ie, the contraction) 1) When returning to the cylinder wall), the compression spring can be used to increase the resistance. However, when the distance of the _ 弹 酱 sauce is too long, the displacement of the 妓 妓 配合 配合 配合 配合 , , , , , , , , 配合 配合When the rainbow wall is out, the tubular body part (tUbe-section-like (4) made of high-strength elastic material is used to achieve the function of reducing noise; only the shock absorber effect is poor. In view of this, after the research and improvement of the * break, the design and design of a hydraulic cylinder (2) suitable for movable homes is finally created. The main purpose of this creation is to provide a kind of hydraulic cylinder (2). Its piston rod __ cylinder ____^ resistance slips, and achieves a smooth and smooth cushioning function. The second time of this creation - the purpose is in the domain - the dynamic rainbow (two) 'sliding shift when the piston rod is extended to the teacher == Pressure 20 M327912 = made again - the purpose is to provide - kind of _ in the hydraulic red of the living furniture The piston has at least a thin elastic piece. When the piston is retracted back to the red wall, the resistance of the piston is less than the elastic restoring force of the fine elastic piece, and the small protrusion of the thin elastic piece can protrude from the rear end surface. The distance between the piston and the rigid valve block can be made, so that the piston rod can be less resisted and the force is faster to extend out of the cylinder wall. [New content] ^A hydraulic type suitable for movable furniture (2), the front side of the piston rod The movable rigid f and the movable _ piston, # piston contact _ cylinder body in the red wall and W slip forward when the sleek slip can be achieved, and achieve a smooth and smooth buffer Wei, and when the piston rod stretches _ Lin-shaped cylinder lion Xianglu (four), can be less prone to faster production slip, and by the front device up to _ Zhen Wei and drop (four) tone gamma, and the piston: less - thin elastic sheet, When the piston rod is retracted to the cylinder wall, the resistance of the piston is less than the elastic restoring force of the thin elastic piece, the small protrusion of the thin elastic piece can protrude from the rear end surface thereof, and the distance between the rigid valve piece and the rigid valve block can be determined. The piston rod can reach the cylinder wall with less resistance and faster speed. The following is a detailed description of the drawing. [Embodiment] As shown in Fig. - to Fig. 9, this creation is a hydraulic cylinder 20 (2) suitable for movable homes, including a red body (1). The measurement of the cylinder wall (8) and the rear view are open, and the reference wall (1)) can be used for the screw with the s plug (5) (4) to be brittle, with the front side mouth end 6 M327912 (111) (refer to Figure 7) It can be used to block the shackles (the county seals the bribes or other means to the front cover (2); the 刖 cover (2) ' is attached to the cylinder body (D front side open end (ηι) (refer to Figure 3, Figure • VII); • 5. The cylinder head (3) is connected to the rear side open end (112) of the cylinder body (1) and has a shaft hole through which the rod W1) of the live plug (4) passes. (31), the cylinder head (3) is fixed by ultrasonic or other means; the spring piston rod (4), the front side of the tie rod body (41) has a smaller shaft diameter portion (4 (1) for pressing and fixing a rigid valve block ( 6) and pivoting the movable piston (5) such that the rigid valve block (6) is located on the rear side of the piston 10 (5) and is spaced apart from each other, and the smaller shaft diameter portion (411) has a front side thereof Clamping groove (41Π) available a support member (412) is disposed adjacent to the piston (5) provided by the piston rod (4); the piston (5) and the pivoting groove (50) are pivoted on the piston rod (41) The front side has an outer diameter slightly smaller than the inner diameter of the cylinder wall (11) of the cylinder body (1), and is preferably made of a plastic material, and the piston (5) is provided with a plurality of axial through holes (51) and a plurality of guide blocks (52) protruding from the rear end surface thereof, wherein the guide blocks (52) are respectively guided into the guide grooves (61) of the rigid valve block (6), so that the piston (5) can be linearly displaced forward and backward but cannot rotate, and The piston (5) is further provided with at least one slot (54) (refer to FIG. 6 and FIG. 9) to form at least a thin elastic piece (55) having a protrusion protruding from the piston (5). After the small end of the end face (551); 2 〇 rigid valve block (6), is pivoted on the piston rod (4) is movable, and just behind the piston (5), its outer diameter is smaller than the cylinder body (1 The inner diameter of the cylinder wall (11) forms a large gap with the cylinder wall (11). The rigid valve block (6) is provided with a plurality of guide grooves (61) (refer to M327912 Fig. 1 and Fig. 6) Each guide groove (61) can be introduced into the guide block (52) of the piston (5), and the rigid valve block (6) Further, a plurality of axial through holes (62) are provided, and each of the axial through holes (62) is a part of the axial through holes (51) of the plurality of axial through holes (51) of the piston (5) Facing each other; - by the composition of the aforementioned members, when the piston rod (4) protrudes out of the cylinder wall (11) and slides backwards, the piston (5) which is subjected to the resistance of the damping fluid can be guided by each of the guide blocks ( 52) guiding and sliding forward, so that the front end of the piston (5) can be stopped by the stopper (412) provided by the piston rod (4), and the rear end (53) of the piston (5) The small protrusions (551) of the thin elastic pieces (55) can maintain a space between the rigid valve blocks (6) and the rigid valve block (6) (refer to FIG. 5), so that the damping fluid can be made up of the shafts of the rigid valve block (6). The through hole (62) or the gap between the rigid valve block (6) and the cylinder wall (n) passes through the gap formed between the rigid valve block (6) and the piston (5) through the respective shafts of the piston (5) Flowing forward through the through hole (51), so that the piston rod and its piston (5) and the rigid valve block (6) can slide backwards with less resistance and faster speed; and when the piston rod (4) is retracted When the cylinder wall (丨丨) slides inward, the piston (5) is subjected to the resistance of the damping fluid, and the piston (5) can abut against the front end of the rigid block (6), and at the same time, the small protrusions (551) of the thin elastic pieces (55) of the piston (5) can be squeezed into the slots (54) ( Referring to Figure 8), the piston rod (4), together with the piston (5), and the rigidity _(6) can withstand a large resistance and slow speed (4) slip, and have a cushioning effect, while the piston 捍 (4) After the front slips and retracts into the cylinder wall (11), the piston (5)'s resistance is small, and the miscellaneous restoring force of the mailing (10) is restored. The material sheet (10) can be restored to its original shape, so that its small protrusion (10) protrudes. After the end face of the piston (5) (refer to Fig. 6), 2〇 can further determine the distance between the piston (5) and the rigid valve block (6), so that the piston rod (4) can be determined along with the piston (5) and the rigid valve block (6). It can slide backwards with less resistance, and the piston rod (4) can extend beyond the red wall (11) at a faster speed; for example, 8 M327912 if the cylinder body (1) of this creation is fixed outside the crawling rail The slide rail (not shown), and the rear side (44) of the piston rod (4) can be interlocked by the inner slide rail (not shown), and the inner slide joint and the piston rod (4) are backward. When moving, it can slide back with less resistance and faster speed. Conversely, when the inner slide rail and the piston rod (4) slide forward, the resistance is relatively high, and the speed can be slower. Slip's the cushioning function of the inner slide along with its associated drawback. Furthermore, the 'front side _ block (6) rear side (10) is tapered or slanted, and the resistance can be reduced when the yoke and the piston rod (4) are slid rearward, and the axial through holes of the rigid slab (6) are reduced. (62) is that the aperture on the front side is smaller and the aperture on the back side is larger, so that the speed of the damping fluid from the front to the back is faster and the force is smaller, and the speed of the damping fluid from the back to the front is faster. Slow resistance is greater. In addition, the hydraulic cylinder applicable to the movable furniture can be further provided with a shock absorber, and the shock absorber includes a shock absorber pad (9) which is made of rubber material. The hollow housing of the axial slot (10)) is (91) 'the axial slot (911) and can be passed by the rod (4) of the piston rod (4), and the hollow housing (91) has the rear side An annular portion (912), a large outer rim portion (913) extending forward from the annular portion (912), and a buffer portion (914) extending forward from the larger outer diameter portion (3), the buffer The diameter of the portion (914) is smaller than the larger diameter portion (gig), wherein the annular portion (912) is nested into the annular groove (32) further provided by the cylinder head (3), and 20 The rear end surface (9131) of the larger outer diameter portion (913) is adjacent to the front end surface (33) of the cylinder head (3), the buffer portion (914) has a pressing portion (9141) having a smaller outer diameter, and the foregoing The axial slot (911) is located at the opposite portion (9111) of the pressing section (9141) (refer to FIG. 3 and FIG. 5). The hole M327912 has a diameter slightly smaller than the diameter of the rod (41) of the piston rod (4). The rod (41) of the piston rod (4) is intended to pass through For the part (9111), the relative part (91Π) needs to be opened first and then passed, and the rod body (41) of the piston rod (4) and the pressing part (9141) of the buffer part (914) are relatively Good adhesion to prevent the damping fluid from penetrating into the axial slot (911); • The positioning seat (8) is a hollow housing with an axial slot (81), and the rear end face (82) is fastened. The front end face (9132) of the larger outer diameter portion (913) of the shock pad (9), and the front end face (83) abuts the rear wall of the cylinder wall (11) of the cylinder body (1) The position of the position of the concave edge (113), and the axial groove (81) of the positioning seat (8) is from the front to the rear, the width is gradually narrowed, and the axial groove of the positioning seat (8) A hole is formed between the hole (81) and the buffer portion (914) of the hollow casing (91) 10 of the shock absorbing pad (9) (refer to FIG. 5) to facilitate the buffer portion (914) of the shock absorbing pad (9). It is compressed backwards, and the end face (82) of the positioning seat (8) can be further provided with a plurality of pointed bodies (821) (refer to FIG. 1 and FIG. 5) for inserting into the hollow casing of the shock pad 3) (91). ) the larger outer diameter portion (913) inside the front end surface (9132) to increase the positioning effect; With the shock absorber composed of the foregoing members, when the rod body (41) of the piston rod (4) protrudes from the cylinder wall (1), the piston rod (4) can slide forward with a small resistance and a relatively fast speed. Until the rigid valve block (6) connected by the piston rod (4) slides to the cylinder wall (the rear part of (1), the rigid _(6) can be used to compress the mat (9) backwards, and the step-by-step shock function and noise reduction are achieved. Advantages. 20 Stepping on the above, this creation can be summarized as follows: 1. The piston rod (4) is retracted into the cylinder wall (11) of the cylinder body (1) and can slide with greater resistance when sliding forward. Shifting and turning the buffering function of the smooth view. M327912 2· When the piston rod (4) extends out of the rainbow wall (8) of the cylinder body (1) and slides backwards, it can reduce the speed of the faster moving wire. -3. Piston (5) has at least - (5), # piston rod (4) lion cylinder wall (1)), after the piston (5) is less resistant than the elastic recovery force of the thin elastic piece (5), the thin 'elastic month (10) small protrusion _ Can be highlighted on the rear end face, which can determine the _ (6)-shaped contact distance, so that the piston 捍 (4) can _ less force touch the speed • wall (11).疋 ’ 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本However, the above is only the preferred embodiment of this creation. When it is not possible to define j as a crime, the equivalent change and modification of the patent application scope of this creation should still be covered by this creation. Within the scope of the patent. BRIEF DESCRIPTION OF THE DRAWINGS Fig. - is a perspective exploded view of the present embodiment. Figure 1 is a perspective view of the present embodiment. Figure 3 is another perspective exploded view of the present embodiment. Figure 4 is another perspective view of the present embodiment. Figure 5 is a schematic cross-sectional view of the present embodiment in which the rigid valve block is spaced from the piston. Figure 6 is a schematic cross-sectional view showing another embodiment of the present embodiment in which the rigid block and the piston are spaced apart. Figure 7 is a schematic cross-sectional view of the implementation of the __ front end when the piston is abutted by the piston. 11 M327912 Fig. 8 is a schematic cross-sectional view showing another angle portion in which the front end of the rigid valve block is abutted by the piston. Figure 9 is a perspective enlarged view of the piston of the present embodiment. Λ [Main component symbol description] • 5- (1) cylinder body (11) cylinder wall (111) (112) open end (113) positioning concave edge (2) front cover, (3) cylinder head (31) shaft hole ( 32) Annular groove (33) (83) (9132) Front end face (4) Piston rod (41) Rod body (411) Small shaft diameter portion (4ΐπ) Positioning groove (412) Stop member (44) Rear side (5) Piston (50) pivot groove (51) (62) axial through hole (52) guide block (53X64) rear end (54) slot (55) thin elastic piece (551) small protrusion (6) rigidity Valve block (61) guide groove (8) (7) clamp seat (81) (911) axial slot (82) (9131) rear end surface (821) pointed body (9) shock pad (91) hollow housing (9Π1) relative portion 312) annular portion (913) larger outer diameter portion (914) buffer portion (9141) pressing portion 12