M398902 五、新型說明： . 【新型所屬之技術領域】 本創作係一種義肢踝關節及承筒真空吸 /、 71、*，〇 構 足踝氣壓缸内部之活塞及推桿的運動配合氣間紐件 肢使用者行進間能維持承筒與殘肢的密合戶。 係以 於義 【先前技術】 膝上載肢或膝下載肢的義肢使用者於行進時，其義肢 側之擺盪幅度及擺盪期通常大於徤肢側，當行走速度加快 時’義肢側更會加大擺盪幅度’以配合健肢側之步態，此 時義肢重量及擺盪速度，便會讓殘肢及承筒承受更大的壓 力變化’因此義肢製造的過程中，會嚴格要求殘肢及承筒 内部達到全面密合且釺適的接觸狀態，以減少壓力變化所 造成的不適；然不同的義肢或不同的路面情況皆會讓承筒 的壓力承受狀態不斷改變，因此當重心改變或擺盪時，承 筒與殘肢的密合度便會降低，造成承筒與殘肢的空隙增 加’此時即容易影響義肢使用者的行走步態，亦或造成疫 肢與承筒磨擦的不適，致使義肢接觸地面時，承筒無法维 持應有的支撐力或密合度，因此急待進一步之改良。 M398902 【新型内容】 · 有錯i於上述各種情況之在 η， ，創作人遂改良習用承筒 及足踝軋壓缸，以配合義肢 抱i± p t 考之步恶’讓其行走間能 維持承筒與殘肢良好的密合度。 疋j 為達到上述目的，本創作之甚> 引-構-有…厂]作之義肢躁關節及承筒真空吸 w、、.〇構。又有足踝氣壓缸， 桿組# ? "果軋壓缸内部設有活塞及推 、'，牛，足缸下方連接義肢聊掌，上方可連接承行 的組件，其足踝氣壓缸 至承筒接頭… ⑽組件可經由導氣管連接 文鱼± ^肢腳掌依足課轴心旋轉與足課氣歷缸呈 2以，可帶動推桿組件將活塞向上推，此時活塞上方 的工氣便會由活塞的上活塞氣孔、 出至活塞下方；而當義肢腳掌…'〜…排 時 mm回復垂直狀態 ::件“吏活塞向下移動，此時承筒内部的空氣便 : …氣間組件的間片、氣室及氣孔至活塞上方的 二:’使承筒内部與殘肢接觸的間隙接近真空狀態，增加 承向與殘肢的密合度。 鏗於行走動作對殘肢及承茼所造成的壓力變化，本創 :τ、利用足踝氣壓缸内部的推桿組件及活塞運動，配合氣 =件’於行走過程中可重複活塞運動，以氣壓變化維持 路^ 4的搶合度’因此能配合不同的行進速度或 俗面情況，祕 ▲持承筒密合及舒適的功能。 M398902 【實施方式】 以下就本創作之結構功能 , 知由較佳之實施例，配合圖式詳細說明後，俾增加對太启丨仏 對本創作之瞭解；本創作係一種 義肢踩關節及承筒真空吸引結構 圖中圖面所示，主要包含足踩 '束管套4，其中； ’凊參閱如第一圖〜十六 氣壓缸1、氣閥組件2、承筒3 晴參閱如第一圖〜第--1- EtM398902 V. New description: . [New technical field] This creation is a kind of prosthetic ankle joint and cylinder vacuum suction, 71, *, 〇 〇 踝 踝 踝 踝 踝 踝 踝 及 及 及 及 及 及The user of the limb can maintain a close contact between the cannula and the residual limb. In the case of a prosthetic user with a knee or limb downloading limb, the swinging amplitude and swinging period of the prosthetic side are usually larger than the side of the ankle. When the walking speed is increased, the prosthetic side will increase. The swing range is in line with the gait of the healthy limb side. At this time, the weight of the prosthetic limb and the swinging speed will cause the residual limb and the bearing cylinder to undergo greater pressure changes. Therefore, in the process of manufacturing the prosthetic limb, the residual limb and the bearing can be strictly required. The interior is fully intimate and suitable for contact to reduce the discomfort caused by pressure changes; however, different prosthetic limbs or different road conditions will cause the pressure bearing state of the cylinder to change constantly, so when the center of gravity changes or swings, The tightness of the barrel and the residual limb will be reduced, resulting in an increase in the gap between the barrel and the residual limb. This will easily affect the walking gait of the prosthetic user, or cause discomfort to the friction between the infected limb and the barrel, resulting in prosthetic contact. On the ground, the cylinder cannot maintain its proper supporting force or tightness, so it is urgent to further improve. M398902 [New content] · There is a problem in the above-mentioned various situations in η, the creator has improved the conventional cylinder and the foot rolling cylinder to match the prosthetic limbs to ensure that the walking can be maintained. The cylinder and the residual limb have a good degree of adhesion.疋j In order to achieve the above objectives, this creation is very important. The yoke-construction--the factory has made the prosthetic ankle joint and the cylinder vacuum suction w,,. There is also an ankle pneumatic cylinder, rod group # ? " fruit rolling cylinder is equipped with a piston and push, ', cattle, under the foot cylinder connected to the prosthetic arm, the top can be connected to the assembly of the line, its foot cylinder to The tube connector... (10) The component can be connected to the squid via the air pipe. The arm of the foot is rotated according to the axis of the axis and the foot cylinder is 2, which can push the push rod assembly to push the piston upward. It will be from the piston's upper piston vent to the bottom of the piston; and when the prosthetic foot ...'~... row mm return to the vertical state:: "The 吏 piston moves down, at this time the air inside the cylinder: ... The inter-sheet, air chamber and air hole of the assembly are above the piston: 'The gap between the inside of the cylinder and the residual limb is close to the vacuum state, which increases the adhesion between the bearing and the residual limb. 铿 The walking action on the residual limb and the bearing The pressure change caused by this: τ, using the push rod assembly inside the pneumatic cylinder and the piston movement, with the gas = piece 'repeating the piston movement during the walking process, maintaining the rush of the road ^ 4 with the pressure change' Therefore, it can match different travel speeds or vulgarities. In this case, the secret ▲ holds the tight and comfortable function of the bearing tube. M398902 [Embodiment] The following is a description of the structure and function of the creation, and the preferred embodiment, with the detailed description of the drawing, adds to the creation of Tai Chi The understanding is based on the drawing of the prosthetic foot joint and the vacuum suction structure of the cylinder, which mainly includes the foot step 'tube sleeve 4, where; '凊 see the first figure ~ sixteen pneumatic cylinder 1, gas Valve assembly 2, cylinder 3 clear as shown in the first figure ~ --1- Et
弟十，、圖所不，足踝氣壓缸1上方設 有束管套4可連接承筒3，下方以碑4入， 万以螺杬123、螺帽124及足踩 軸心1 2連接義肢腳掌1 26，足踝氣厭A* 疋果札壓缸1之内部設有活塞1 〇 ’活基1 0設有一個以上的上活卖乌如】Λ。 J上居基軋孔1 03及下活塞氣孔i 04 ’活塞10周緣設有U型油封1〇2 ;上、-壬寞与方！ Λ0 L山± 上，古基軋孔10 3上端連接至 活基10上方，上活塞氣孔丨03下端連接至U型油封ι〇2上方， 下活塞氣孔104上端連接至u型油封1〇2下方，下活塞氣孔Tenth, the figure is not, the upper part of the pneumatic cylinder 1 is provided with a bundle sleeve 4 which can be connected to the cylinder 3, and the lower part is inserted with the monument 4, the snail 123, the nut 124 and the foot shaft 1 2 are connected to the prosthetic limb. The foot 1 26, the ankle suffocation A* The scorpion pressure cylinder 1 is internally provided with a piston 1 〇 'live base 1 0 has more than one live sale Wu Ru】 Λ. J on the base rolling hole 103 and the lower piston air hole i 04 'the piston 10 is provided with a U-shaped oil seal 1〇2; upper, -壬寞 and square! Λ0 L山±, the upper end of the ancient base rolling hole 10 3 is connected to the upper side of the movable base 10, the lower end of the upper piston air hole 丨03 is connected to the upper side of the U-shaped oil seal ι〇2, and the upper end of the lower piston air hole 104 is connected to the lower side of the u-type oil seal 1〇2 Lower piston vent
1 04下端連接至活塞1 〇下方；活塞丨〇下方設有第一連接點 1 21及第二連接點1 2 2 ’活塞連接點1 〇 1與第一連接點丨2丨及 第二連接點1 22之間設有推桿組件1丨，該推桿組件丨丨係包含 弟一推杯111下端連接於足踩氣壓缸1的第一連接點1 21，第 —推桿11 2下端連接於足踝氣壓缸1的第二連接點1 2 2，上端 連接於第一推桿1 Π，第三推桿11 3下端連接於第一推桿u ! 上端’上端連接活塞連接點1 0 1 ;足踝氣壓缸1外側設有氣 閥組件2，該氣間組件2係包含一閥針22，該閥針22設有閥 片23及0型環24，轉動間針22可調節氣流大小；接頭21設置 於氣閱組件2 山 禾端’氣閥組件2‘氣室201設有氣孔20，連 接至足蝶氣麻k彳& Λ 缸1内部之活塞10上方，導氣管32連接接頭21 及承筒3的承筒接頭31。 請參閱如兹__ 乐一圖〜第十圖所示，對應於不同截肢區段 的義肢使用去，^ ’足躁氣壓缸1與承筒3之間可設置膝關節5 或直接設置羞λ 我肢小腿，而當使用者穿戴行走時，義肢腳掌 ，腳跟著地，足踝氣壓缸1及義肢腳掌1 26之間的彈性橡 膠1 2 5可提供@ | $ '、、或衝吸展功能’同時義肢腳掌126依足踝軸心 疋轉τ動第二推桿11 2及第二連接點丨22向上移動，而 又/第推梓111及第一連接點1 2 1的限制，第一推桿上i! 則會使第三推桿113推動活塞1〇向上’推引活塞10上方的空 乱經由上活塞氣孔型油封1〇2上方，以此氣體壓力使 i油封1 02梃向内縮，讓u型油封1 〇2與足踝氣壓缸1内壁形 成間隙，空氣便經由此間隙由下活塞氣孔丨。4排出至活塞ι〇 下方，是為本創作第一種排氣實施方式；而本創作之第二 種排氣實施方式，請參閒如第十一圖〜第十六圖所示，係 方、足踩氣壓& 1上方之束管套4設置排氣閥4卜排氣間41設 有一個以上的排氣閥氣孔4丨1及U型油封，同第一種排氣實 施方式的推桿組件U運動，t推桿組#11推動活塞1〇向上 ’活塞10上方的空氣被活塞10向上推引至排氣閥氣孔⑴ ，再經由排氣閥氣孔^丨至！)型油封102，以此氣體壓力使U 型油封102微向内縮，讓U型油封102與排氣閥41内壁形成間 M398902 隙’空氣則可經由此間隙排出至束管套4,因此第一種或第 -種排秔貫施方式皆可達到空氣排出的功能；❿當義肢腳 掌1 26與足踝氣壓缸丨回復垂直狀態時，推桿組件11會使活 塞1 〇向下移動，此時足踝氣壓缸1外部的氣體壓力會大於内 ，使_油封102向外撐開，讓U型油封102與足踝氣壓缸i 内壁饴合，同時承筒3内部的空氣便會由導氣管32進入氣閥 組件2通過微彎的閥片23至氣室201經氣孔20達活塞1〇上方 的空間’使承筒3内部與殘肢接觸的間隙接近真空狀態，以 此重複運仃之動作，即可增加承筒與殘肢的密合度，維持 承筒岔合及舒適的功能。 本創作第三種實施方式，請參閱如第十七圖〜第二十 斤示°亥只細方式之氣閥組件2可選擇不設置閥片2 3 而改採單向排氣閥6之功能取代，本實施方式主要係於足 踝乱壓缸1上方之束管套4設置單向排氣閥6，該單向排氣閥 彖认有II型油封1〇2，内部設有上氣室及下氣室6〇2 ，下氣室602與活塞10上方之空間連通，擋片61設置於上氣 室601及下氣室6〇2之間，且下方設有彈簧62，而該擋片6ι 亦可士 —十—圖或二十四圖所示，設置〇型環Μ或改用錐形 的擋片61，其中進氣通孔6〇3連接氣閥組件2之氣孔2〇及上 氣室6〇1，排氣通孔604連接至足踝氣壓缸丨内部之活塞1〇 上方及單向排氣間6上緣，同第—種與第二種排氣實施方式 々推杯、.且件1 1運動，當推桿組件丨丨推動活塞1 〇向上，活塞 M398902 1 〇上方的空氣被活塞l 〇向上推引皇μ今、s w β n ^ * 7丨王徘軋通孔604，再經由排 氣通孔604至單向排氣閥6上緣的υ型油封丨n? 主由封1 0 2，利用氣體壓 力使U型油封1 〇 2與單向排氣閥6内壁# & η 土心成間隙，將空氣排出 至束管套4;而當義肢腳掌126與足躁氣壓缸i回復垂直狀態 時，推桿組件11會使活塞10向下 和 此吋疋踝氣壓缸1 外部的氣體壓力會大於内部，使單 干[)铆轧閥6上緣的u型油 封102向外撐開，讓U型油封1〇2將間隙密合，同時承筒3内 部的空氣便會由導氣管32進人氣間組件2，再經氣⑽由進 氣通孔6。3到達單向排氣闊6之上氣室6〇1，利用該氣體壓力 推動擔片61壓縮彈簧，讓空氣進入下氣室6〇2及活㈣上方 的空間，使承筒3内部與殘肢接觸的 幻间隙接近真空狀態，承 苐一種及第二種實施方式所述， 此董歿運行之動作，即 可增加承筒與殘肢的密合度， 问在σ及舒適的功能 ;惟，以上所述者，僅為本創 伞引作之較佳貫施範例，當不能 以之作4；㈣本㈣f施之範 L伋本創作申請專利範 圍所作之均等變化或修飾， 剔忭寻利涵盍之範圍 内。 【圖式簡單說明】 第一圖：為本創作之示意圖。 第二圖：為本創作之示意圖。 第三圖：為本^乍氣閥组件之示意圖 M398902 第四圖：為本創作氣閥組件之示意圖。 第五圖：為本創作第一實施方式之示意圖。 第六圖：為本創作第一實施方式之示意圖。 第七圖：為本創作第一實施方式之示意圖。 第八圖：為本創作第一實施方式之示意圖。 第九圖：為本創作第一實施方式之示意圖。 第十圖：為本創作第一實施方式之示意圖。 ® 第十一圖：為本創作第二實施方式之示意圖。 第十二圖：為本創作第二實施方式之示意圖。 第十三圖：為本創作第二實施方式之示意圖。 第十四圖：為本創作第二實施方式之示意圖。 第十五圖：為本創作第二實施方式之示意圖。 第十六圖：為本創作第二實施方式之示意圖。 第十七圖：為本創作第三實施方式之示意圖。 ®第十八圖：為本創作第三實施方式之示意圖。 第十九圖：為本創作第三實施方式之示意圖。 第二十圖：為本創作第三實施方式之示意圖。 第二十一圖：為本創作第三實施方式之示意圖。 第二十二圖：為本創作第三實施方式之示意圖。 第二十三圖：為本創作第三實施方式之示意圖。 第二十四圖：為本創作第三實施方式之示意圖。 M398902The lower end of 1 04 is connected to the lower part of the piston 1 ;; the first connection point 1 21 and the second connection point 1 2 2 'the piston connection point 1 〇1 and the first connection point 丨2丨 and the second connection point are arranged below the piston 丨〇 Between 1 and 22, there is a push rod assembly 1丨, the push rod assembly includes a first connection point 211 connected to the foot cylinder 1 at the lower end of the push cup 111, and the lower end of the first push rod 11 2 is connected to The second connection point of the ankle cylinder 1 is 2 2 2, the upper end is connected to the first push rod 1 Π, and the lower end of the third push rod 11 3 is connected to the first push rod u! The upper end of the upper end is connected with the piston connection point 1 0 1 ; An air valve assembly 2 is disposed outside the ankle cylinder 1 , and the air chamber assembly 2 includes a valve needle 22 , and the valve needle 22 is provided with a valve piece 23 and an 0-ring 24 , and the rotating needle 22 can adjust the air flow size; 21 is disposed in the air reading component 2, the Shanhe end 'valve assembly 2', the air chamber 201 is provided with a venting hole 20, which is connected to the piston 10 inside the foot butterfly, and the air guiding tube 32 is connected with the joint 21 and The socket joint 31 of the cartridge 3. Please refer to the __ 乐一图~10th picture, corresponding to the use of prosthetic limbs in different amputation sections, ^ 'foot joint cylinder 1 and the canister 3 can be set between the knee joint 5 or directly set the shame λ I have a calf, and when the user wears the walking, the prosthetic foot, the heel strikes the ground, the elastic rubber between the ankle cylinder 1 and the prosthetic foot 1 26 can provide @ | $ ', or the suction function. 'At the same time, the prosthetic foot 126 depends on the axis of the axis, the second push rod 11 2 and the second connection point 丨 22 move upward, and the / push 梓 111 and the first connection point 1 2 1 limit, first On the push rod, i! will cause the third push rod 113 to push the piston 1〇 upwards to push the air above the piston 10 through the upper piston air hole type oil seal 1〇2, so that the gas pressure makes the i oil seal 102 inward Shrinking, the u-type oil seal 1 〇 2 forms a gap with the inner wall of the ankle pneumatic cylinder 1, through which the air is smashed by the lower piston air vent. 4 discharged to the bottom of the piston ,, is the first exhaust implementation of this creation; and the second exhaust implementation of this creation, please see the eleventh to sixteenth, the system The foot valve sleeve 4 above the air pressure & 1 is provided with an exhaust valve 4, and the exhaust chamber 41 is provided with more than one exhaust valve air hole 4丨1 and a U-shaped oil seal, similar to the first exhaust gas embodiment. The rod assembly U moves, t push rod group #11 pushes the piston 1〇 upwards. The air above the piston 10 is pushed upward by the piston 10 to the exhaust valve air hole (1), and then through the exhaust valve air hole! The oil seal 102 is configured such that the U-shaped oil seal 102 is slightly retracted by the gas pressure, and the U-shaped oil seal 102 and the inner wall of the exhaust valve 41 are formed with a gap of M398902. The air can be discharged to the bundle sleeve 4 through the gap, so One or the first type of drainage method can achieve the function of air discharge; when the prosthetic foot 1 26 and the ankle pneumatic cylinder 丨 return to the vertical state, the push rod assembly 11 will move the piston 1 〇 downward, this When the pressure of the gas outside the pneumatic cylinder 1 is greater than the inner pressure, the oil seal 102 is outwardly disengaged, and the U-shaped oil seal 102 is engaged with the inner wall of the ankle cylinder i, and the air inside the cylinder 3 is guided by the air duct. 32 entering the gas valve assembly 2 through the slightly curved valve piece 23 to the air chamber 201 through the air hole 20 to the space above the piston 1〇 'the gap between the inside of the cylinder 3 and the residual limb is close to the vacuum state, thereby repeating the operation , can increase the tightness of the barrel and the residual limb, and maintain the function of the tube fitting and comfort. For the third embodiment of the creation, please refer to the function of the one-way exhaust valve 6 as shown in the seventeenth to the twenty-thth. Instead, the present embodiment mainly provides a one-way exhaust valve 6 for the bundle sleeve 4 above the ankle pressure cylinder 1 , which has a type II oil seal 1〇2 and an upper air chamber inside. And a lower air chamber 6〇2, the lower air chamber 602 is in communication with the space above the piston 10, and the blocking piece 61 is disposed between the upper air chamber 601 and the lower air chamber 6〇2, and a spring 62 is disposed below, and the blocking piece is provided 6ι can also be used as shown in Fig. 10- or Fig. 24, with a 〇-shaped ring or a tapered flap 61, wherein the intake passage 6〇3 is connected to the vent 2 of the valve assembly 2 and The air chamber 6〇1, the exhaust through hole 604 is connected to the upper part of the piston 1〇 inside the ankle pneumatic cylinder and the upper edge of the one-way exhaust room 6, the same type and the second exhaust embodiment push the cup, And the movement of the member 1 1 , when the push rod assembly 丨丨 pushes the piston 1 〇 upward, the air above the piston M398902 1 is pushed upward by the piston l 引 μ, sw β n ^ * 7 丨 徘 徘 through hole 604 , The υ-type oil seal 丨n through the exhaust through-hole 604 to the upper edge of the one-way exhaust valve 6 is mainly sealed by the gas pressure to make the U-shaped oil seal 1 〇 2 and the inner wall of the one-way exhaust valve 6 & η The earth core is in a gap, and the air is discharged to the bundle sleeve 4; and when the prosthetic foot 126 and the ankle pressure cylinder i return to a vertical state, the push rod assembly 11 causes the piston 10 to be downward and outside the crucible cylinder 1 The gas pressure will be greater than the inside, so that the u-type oil seal 102 on the upper edge of the single-drying [) riveting valve 6 is outwardly extended, so that the U-shaped oil seal 1〇2 will close the gap, and the air inside the cylinder 3 will be guided. The air pipe 32 enters the air-to-air component 2, and then passes through the air intake hole (6) to reach the one-way exhaust air 6 above the air chamber 6〇1, and the gas pressure is used to push the support piece 61 to compress the spring to let the air enter. The space above the gas chamber 6〇2 and the living (4) makes the magical gap between the inside of the cylinder 3 and the residual limb close to a vacuum state, and the action of the Dongsong operation can be increased as described in the second embodiment and the second embodiment. The degree of tightness between the barrel and the residual limb, asks for the function of σ and comfort; however, the above is only the best example of the creation of this umbrella. When it can not be 4; uniformly present ㈣f administered iv and Fan L Drain scope of the present patent application made by the creation of changes or modifications within the profit seeking tick Bian Han He scope. [Simple description of the diagram] The first picture: a schematic diagram of the creation. The second picture: a schematic diagram of the creation. The third picture: the schematic diagram of the valve assembly of M乍. M398902 The fourth picture: the schematic diagram of the valve assembly of the creation. The fifth figure is a schematic diagram of the first embodiment of the creation. Figure 6 is a schematic diagram of the first embodiment of the present creation. Figure 7 is a schematic diagram of the first embodiment of the present creation. The eighth figure is a schematic diagram of the first embodiment of the creation. Ninth diagram: A schematic diagram of the first embodiment of the present creation. The tenth figure is a schematic diagram of the first embodiment of the present creation. ® Figure 11: Schematic diagram of the second embodiment of the creation. Twelfth Diagram: A schematic diagram of the second embodiment of the present creation. Thirteenth Diagram: A schematic diagram of the second embodiment of the present creation. Figure 14: Schematic diagram of the second embodiment of the present creation. Figure 15 is a schematic diagram of the second embodiment of the present creation. Figure 16: Schematic diagram of the second embodiment of the present creation. Figure 17: Schematic diagram of the third embodiment of the present creation. ® Figure 18: Schematic diagram of the third embodiment of the creation. Figure 19: Schematic diagram of the third embodiment of the present creation. Figure 20: Schematic diagram of the third embodiment of the present creation. Twenty-first figure: A schematic diagram of the third embodiment of the present creation. Twenty-second diagram: A schematic diagram of the third embodiment of the creation. Twenty-third figure: A schematic diagram of the third embodiment of the present creation. Figure 24: Schematic diagram of the third embodiment of the present creation. M398902
【主要元件符號說明】 1 足踩氣壓缸 201 氣室 10 活塞 21 接頭 101 活塞連接點 22 閥針 102 U型油封 23 閥片 103 上活塞氣孔 24 0型環 104 下活塞氣孔 3 承筒 11 推桿組件 31 承筒接頭 111 第一推桿 32 導氣管 112 第二推桿 4 束管套 113 第三推桿 41 排氣閥 12 足踩軸心 411 排氣閥氣孔 121 第一連接點 5 膝關節 122 第二連接點 6 單向排氣閥 123 螺栓 61 擋片 124 螺帽 62 彈簧 125 彈性橡膠 601 上氣室 126 義肢腳掌 602 下氣室 2 氣閥組件 603 進氣通孔 20 氣孔 604 排氣通孔 10[Main component symbol description] 1 foot pressure cylinder 201 gas chamber 10 piston 21 joint 101 piston connection point 22 valve needle 102 U-type oil seal 23 valve plate 103 upper piston air hole 24 0 type ring 104 lower piston air hole 3 cylinder 11 push rod Assembly 31 Receptacle joint 111 First push rod 32 Air duct 112 Second push rod 4 Beam sleeve 113 Third push rod 41 Exhaust valve 12 Foot shaft 411 Exhaust valve air hole 121 First connection point 5 Knee joint 122 Second connection point 6 One-way exhaust valve 123 Bolt 61 Stopper 124 Nut 62 Spring 125 Elastic rubber 601 Upper air chamber 126 Prosthetic foot 602 Lower air chamber 2 Air valve assembly 603 Intake through hole 20 Air hole 604 Exhaust through hole 10