200907175 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種小型粟浦，* 雷、、也糸絲望^ 指一種被用於燃料 冤池系、、光寻、且使用隔膜之小型泵浦。 【先前技術】 根據第三圖說明習知之此種小型 觸浦1之縱剖面圖，其藉由具有120以:: 個垂直切斷面以軸中心而被切 罐内内藏有三個隔膜3、3、3,該丄=係言 係以依搖動體4而依序上下運動之方式所構成。 带^^第三圖中之該小型果浦1係具備有於箱體2内 膜3% ^、5、5之三個隔膜3、3、3 ’並於該隔 义 之下方設有使該隔膜3、3、3上下運動的 ;1動肢4。在龍4突設有分別具有空氣導入孔 (:;:7的軸體73、73、73，該空氣導入孔7、 膜3 =位於該搖動體4之周邊部近旁，且與設於前述隔 在該軸體；：之7各"7心爾穿孔6、6、6相連通， 8、 [ a、7a之外側面嵌接中空狀安裝體8、 中空部，該中空狀安装體8、8、8係突設於前 〇 3之底邛中心部背面，藉此可使該隔膜3、 d、3連結於該搖動體4。 ^ 山忒搖動體4係被壓入於其中心部之開口部，搖動 9 而°卩遊肷於設在支撐部2 b下面之凹部，該支撐部 體4係目體2之上板2 a之中心部下方突設，且將搖動 —下端部偏心固設於旋轉體9之偏心旋轉軸1〇係藉由 200907175 以雨述上端部之遊肷部為支點之偏心旋轉而搖動。然後， 偏心旋轉轴1〇係偏心固設於藉由旋轉驅動 的旋轉體9。 更且’在隔膜3、3、3之底部中心部設有貫穿孔6、 6、6’在該貫穿孔6、6、6上面設有吸氣閥體12、 1 2、1 2以構成吸制部¥1。該吸氣閥^ 膜3之一部分予以切開所形成。 ”、同 又;_在箱體2之上板2 a之中央部開穿有排氣孔12 :排f m2面部之該排氣孔12 a外周設有與 。亥排軋孔1 2 a相連通的三個環狀凹槽丄3 ί形成凹槽 =隔以„2a之壁面13b壓接由 4 之上端部所構成的排氣閥體1 4、1 4、1 4以構成吸氣閥部v2。 丄 另外，元件符號15係顯示隔腔q 0 〇 將該軸環部1 5、1 5、1 5八計人、山、3之轴環部， 之孔部並將膜3、3、^ =讀_體2所設 0 d女I於該箱體2内。 如此，當前述旋轉驅動軸] 1 〇旋轉時前舰缝4心冰且喊偏喊轉軸 3之下端部依序上下縣。=動:^使㈣隔膜3、3、 下運動時’該隔膜3内會丄“隔膜3之下端部向 會密接於前述環狀凹槽！ ’而前述棑氣閥體1 4 閥部V2會閉合，且前述;面1 3 a，前述排氣 !之閉塞狀態，而前述吸氣二1 2會解除前述貫穿孔 所述空氣導入孔7朝向該^ 1則變成開啟狀態並從 述隔膜3之下端部向上運動時吸氣。其次’當前 内就會變成高壓， 200907175 而前述吸氣閥體1 2會閉塞前述貫穿孔6以使前述吸氣閥 部V 1形成閉合狀態，並且前述吸氣閥體1 4會比前述壁 面1 3 a更擴大直徑並依吸氣閥部V2進行排氣，如此可 執行小型泵浦1之排吸動作。（參照專利文獻1 ) (專利文獻1)曰本特開2 0 0 2-5 0 2 9號公報 上述專利文獻1所記載之小型泵浦1中，由於隔膜3 係將突設於搖動體4之轴體7 a嵌接於該隔膜3底部中央 部背面突設的中空狀安裝體8之中空部以使該隔膜3安裝 於搖動體4，所以當搖動體4將隔膜3往上推並壓縮泵浦 室5時，突設於搖動體4之軸體7 a上端面就會直接接觸 到設於隔膜3底部中央部之吸氣閥體1 2並對泵浦室4 5 加壓。因而，在該軸體7 a與吸氣閥體1 2之接觸面會發 生摩擦，而造成設於該隔膜3之吸氣闊體1 2磨耗破損的 問題，且有發生小型泵浦1之輸出及運轉壽命之降低等的 缺陷。 因此，延生出為了消除在小型泵浦中形成於隔膜之吸 氣閥體因搖動體之搖動作用而發生破損，並避免招致泵浦 輸出及運轉壽命之降低而所欲解決的技術課題，本發明係 以解決該課題為目的。 【發明内容】 本發明係為了達成上述目的而提案者，其提供一種小 型泵浦，係具備於箱體内形成泵浦室的複數個隔膜，藉由 依偏心旋轉軸而搖動的搖動體使前述隔膜上下運動以進行 泵浦動作者，該小型泵浦係在該隔膜之底部中心部設置貫 穿孔，將連通至該貫穿孔之具有空氣導入孔的轴體突設於 前述搖動體，在該轴體嵌接一於前述隔膜之底部背面突設 8 200907175 的中空狀安裝體以將該隔膜連結於該搖動體，並且在前述 貫穿孔設置吸氣閥體以構成吸氣閥部所成者，其中：設置 於上述搖動體之轴體係將其剖面形狀形成大致工字狀並於 中央部設有凹部，另一方面，突設於前述隔膜之底部背面 的中空狀安裝體係將其下部朝内侧折彎，並將該折彎部密 合嵌接於設在前述軸體之凹部以將隔膜安裝於搖動體，藉 此以設於隔膜之吸氣閥部不因搖動體之搖動作用而破損之 方式所構成。 依據該構成，即可使突設於搖動體的軸體之凹部強固 地與將朝隔膜底部中心部下面突設的中空狀安裝體之下部 朝内侧折彎所成的折彎部密合嵌接以使該隔膜安裝於搖動 體。 本發明，由於係將朝隔膜底部中央部背面突設的中空 狀安裝體之下部朝内侧折彎，而且，將該折彎部密合嵌接 於朝搖動體突設之設於轴體的凹部以將隔膜安裝於搖動 體，所以隔膜可藉由前述密合嵌接部而固定雙方。如此， 在隔膜依搖動體之搖動而上下運動時，由於前述軸體之上 端部不會直接按壓吸氣閥體，所以該吸氣閥體不會因該隔 膜之上下動作而發生損傷，因而，可抑制小型泵浦之輸出 及運轉壽命之降低。 為使能更進一步瞭解本發明之特徵及技術内容，請參 閱以下有關本發明之詳細說明與附圖，然而所附圖式僅提 供參考與說明用，並非用來對本發明加以限制者。 【實施方式】 本發明係為了要達成防止小型泵浦中形成於隔膜之吸 氣閥體因搖動體之搖動作用而發生破損，並避免招致泵浦 9 200907175 輸出及運轉壽命之降低，㈣由提供—種 型粟浦’係具備於箱體内形成栗浦室的複::: 膜，猎由依偏心旋轉軸而搖動的搖動體使前述隔膜上 ::二；浦動作者’該小型泵浦係在該隔膜之底部中心 邛扠置貝牙孔，將連通至該貫穿孔之具有空氣 ^設於前述搖動體，在該軸體栽接突設於前述隔膜之底 面的巾空狀安裝體以將該隔膜連結於該搖動體，、並且 在丽述貫穿孔設置吸氣關以構成吸氣_所成者，盆 二====剖::狀!成， 底:”空狀安裝體係將其下部朝二:;述 2部密合嵌接於設在前述軸體之㈣以將隔膜安裝於搖 體，稭此以設於隔膜之吸氣閥部不因搖動體之搖動 而破損之方式所構成。 (實施例） 以下，根據第一圖及第二圖詳細說明本發明之較佳實 ，例。另外，為了說明方便起見，與第三圖所示之習= ，、通的部分係附記相同元件符號並省略其說明。 —第一圖係顯示本發明小型泵浦之平面圖；第二圖係第 之A —Α線剖面圖。圖中，小型泵浦2丄係由上箱體 f2、下箱體23、隔膜2 4、搖動體25及馬達26所 構成三將亡箱體2 2與隔膜2 4之間的空間當作泵浦室5 空氣之吸入及排出。X ’在隔膜2 4之上箱體2 2 又有排氣閥體1 4 ’而在該隔膜2 4之搖動體2 5側設 有吸氣閥體1 2。 此藉由上述馬達2 6之驅動而使搖動體2 5動 10 200907175 作，藉由該搖動體 . 膨脹以獲得泵 上下運動使前述泵浦室5壓縮、 側搖動時，泵浦二'，當搖動體2 5朝上箱體2 2 放而栗浦J内 a排出。反之，者搖二：工乳（流體）可從排氣孔1 2 室5會膨脹。此二5朝馬達2 6側搖動時，栗浦 可透過空氣流人孔2 體12被開放，岐浦室5内 '系列動作即空氣。藉由反覆進行如此的 料電池系_ =作為泵浦之固定輸出，例如被用於燃 果外，小型系浦2 1之詳細構成及_效 分附明之習知技術共通的部分之中，大部 明之特徵 魅省略⑽細說明，以下，說明本發 2 1 ==以第一圖之A —A線縱切本發明之小型泵浦 =;=。圖中，在隔膜24之底部24a的中心部 ，二知例同樣地開穿有貫穿孔6，然後，設有將該貫穿 ⑶予以開_吸氣閥體丄2以構成吸氣閥部v”本趣200907175 IX. INSTRUCTIONS: [Technical field to which the invention pertains] The present invention relates to a small-sized submerged spur, which is used in a fuel cell system, optical homing, and using a diaphragm. Small pump. [Prior Art] A longitudinal cross-sectional view of a conventional small-sized contact lens 1 is described in the third figure, which has three slits 3 in the cut can by having 120:: a vertical cut surface at the center of the shaft. 3, 3, the 丄 = system language is formed by means of moving up and down in accordance with the oscillating body 4. The small-sized fruit-pull 1 in the third figure has three membranes 3, 3, and 3' which are located in the inner membrane 3% ^, 5, and 5 of the casing 2 and are provided under the barrier. The diaphragms 3, 3, 3 move up and down; 1 the limbs 4. In the dragon 4, shaft bodies 73, 73, 73 each having an air introduction hole (:; 7) are provided, and the air introduction hole 7, the film 3 = is located near the peripheral portion of the rocking body 4, and is disposed in the foregoing In the shaft body; 7 of each "7 heart perforations 6, 6, 6 are connected, 8, [a, 7a outside the side of the hollow mounting body 8, hollow portion, the hollow mounting body 8, The 8 and 8 series are protruded from the back of the center portion of the front cymbal 3, whereby the diaphragms 3, d, and 3 are coupled to the oscillating body 4. ^ The swaying body 4 is pressed into the center portion thereof. The opening portion is rocked and moved to a concave portion provided under the support portion 2b. The support portion body 4 is protruded below the center portion of the upper plate 2a of the object body 2, and the rocking-lower end portion is eccentrically fixed. The eccentric rotating shaft 1 provided on the rotating body 9 is oscillated by the eccentric rotation of the floating portion of the upper end portion of the spring, and the eccentric rotating shaft 1 is eccentrically fixed to the rotation by the rotation. Body 9. Further, 'through holes 6, 6, 6' are provided in the central portion of the bottoms of the diaphragms 3, 3, 3, and the intake valve bodies 12, 12, 1 2 are provided on the through holes 6, 6, 6. Take The suction part is ¥1. One part of the suction valve ^3 is cut open.", the same; _ in the central part of the upper part 2a of the box 2 is opened with a venting hole 12: row f m2 The outer circumference of the vent hole 12a of the face is provided with three annular grooves 连通3 ί communicating with the slab rolling hole 1 2 a to form a groove=the wall surface 13b separated by „2a is crimped by the upper end of 4 The exhaust valve bodies 1 4, 14 and 14 are configured to constitute an intake valve portion v2. In addition, the component symbol 15 indicates a compartment q 0 〇 the collar portion 15 5, 15 5, 1 5 The hole portion of the man, the mountain, and the collar portion of the 3, and the film 3, 3, ^ = read body 2 is set to 0 d female I in the case 2. Thus, when the aforementioned rotary drive shaft] 1 〇 When rotating, the front seam 4 heart ice and shouted the lower end of the shaft 3 in order to go up and down the county. = move: ^ make (four) diaphragm 3, 3, when the lower movement, the diaphragm 3 will 丄 "the lower end of the diaphragm 3 Will be in close contact with the annular groove! 'The valve body V2 of the helium valve body 14 will be closed, and the surface 13 3 a, the venting state of the exhaust gas, and the inhalation 2 will cancel the aforementioned The air introduction hole 7 of the through hole becomes open toward the ^1 And inhaling from the lower end portion of the diaphragm 3. Secondly, it will become a high pressure in the present, 200907175, and the inhalation valve body 12 will block the through hole 6 to form the inhalation valve portion V1 to be closed. And the intake valve body 14 is expanded in diameter by the wall surface 13 a and is exhausted by the intake valve portion V2, so that the suction operation of the small pump 1 can be performed (refer to Patent Document 1) (Patent In the small pump 1 described in the above Patent Document 1, the diaphragm 3 is fitted to the shaft body 7 a protruding from the rocking body 4 in the small pump 1 of the above-mentioned Patent Document 1 The hollow portion of the hollow mounting body 8 projecting from the rear surface of the bottom portion of the bottom portion of the diaphragm 3 is such that the diaphragm 3 is attached to the rocking body 4, so when the rocking body 4 pushes up the diaphragm 3 and compresses the pumping chamber 5, the protruding portion is protruded. The upper end surface of the shaft body 7 a of the rocking body 4 directly contacts the suction valve body 1 2 provided at the center of the bottom portion of the diaphragm 3 and pressurizes the pump chamber 45. Therefore, friction occurs at the contact surface between the shaft body 7a and the intake valve body 12, and the suction wide body 12 provided in the diaphragm 3 is worn and worn, and the output of the small pump 1 occurs. And defects such as a decrease in operating life. Therefore, the present invention has been developed in order to eliminate the problem that the intake valve body formed in the diaphragm in the small pump is broken by the rocking action of the rocking body and avoids a decrease in the pump output and the operating life. The aim is to solve this problem. SUMMARY OF THE INVENTION The present invention has been made in an effort to achieve the above object, and provides a small pump having a plurality of diaphragms formed in a chamber to form a pump chamber, the diaphragm being oscillated by a eccentric rotating shaft Moving up and down to perform pumping, the small pump is provided with a through hole at a bottom portion of the diaphragm, and a shaft body having an air introduction hole communicating with the through hole is protruded from the rocking body at the shaft body Engaging a hollow mounting body of the bottom surface of the diaphragm at the bottom of the diaphragm to join the 200907175 to connect the diaphragm to the rocking body, and providing the suction valve body in the through hole to form an intake valve portion, wherein: The shaft system provided in the rocking body has a cross-sectional shape formed in a substantially I-shape and is provided with a concave portion at the center portion. On the other hand, the hollow mounting system protruding from the bottom surface of the diaphragm has the lower portion bent toward the inside. And the bent portion is in close contact with the concave portion provided in the shaft body to attach the diaphragm to the rocking body, so that the suction valve portion provided on the diaphragm is not shaken by the rocking body And the way of damage is made up. According to this configuration, the concave portion of the shaft body protruding from the rocking body can be firmly engaged with the bent portion formed by bending the lower portion of the hollow mounting body projecting toward the lower surface of the bottom portion of the diaphragm bottom portion. The diaphragm is mounted to the rocking body. According to the present invention, the lower portion of the hollow mounting body projecting toward the back surface of the central portion of the diaphragm bottom is bent inward, and the bent portion is tightly fitted to the recessed portion provided in the shaft body protruding toward the rocking body. Since the diaphragm is attached to the rocking body, the diaphragm can be fixed to both sides by the aforementioned tight fitting portion. In this way, when the diaphragm moves up and down according to the rocking of the rocking body, since the upper end portion of the shaft body does not directly press the intake valve body, the intake valve body is not damaged by the upward movement of the diaphragm. It can suppress the reduction of the output and operating life of small pumps. The detailed description of the present invention and the accompanying drawings are to be understood as the [Embodiment] The present invention is to prevent breakage of an intake valve body formed in a diaphragm in a small pump due to a rocking action of a rocking body, and to avoid a decrease in output and operating life of the pump 9 200907175, (4) - The type of Supu's system consists of a complex::: membrane formed in the chest of the box, and the swaying body is shaken by the eccentric rotating shaft to make the diaphragm: 2; Pudong author's small pumping system a bead hole is disposed at a center of the bottom of the diaphragm, and air is connected to the through hole, and the air is disposed on the rocking body, and the hollow body is protruded from the bottom surface of the diaphragm The diaphragm is coupled to the oscillating body, and is provided with a suction closing in the reference through-hole to constitute an inhalation, and the basin 2 ====section::!, bottom: "the empty installation system will The lower part faces two: the two parts are closely fitted to the fourth shaft provided in the shaft body to mount the diaphragm on the rocker, and the straw is not damaged by the shaking of the rocking body. (Embodiment) Hereinafter, the present invention will be described in detail based on the first diagram and the second diagram. For the sake of convenience of explanation, the parts of the same reference numerals as those in the third drawing are denoted by the same reference numerals and the description thereof will be omitted. - The first figure shows the small pump of the present invention. The second drawing is a sectional view of the A-Α line. In the figure, the small pump 2 is composed of an upper case f2, a lower case 23, a diaphragm 24, a rocker 25 and a motor 26. The space between the dead box 2 2 and the diaphragm 24 is taken as the suction and discharge of the air in the pump chamber 5. X 'above the diaphragm 2 4, the tank 2 2 has the exhaust valve body 1 4 ' in the diaphragm The suction body 2 2 is provided on the side of the rocking body 2 5 of the 2 4 . The driving body 2 5 is moved by the driving of the motor 26 6 200907175, and the rocking body is expanded to obtain the up and down movement of the pump. When the pump chamber 5 is compressed and side-swinged, the pump is pumped two', and when the rocking body 25 is placed toward the upper tank 2 2, the pump is discharged from the chestnut J. On the contrary, the shaker 2: the working milk (fluid) can be discharged from the row The air hole 1 2 chamber 5 will expand. When the two 5 are oscillated toward the motor 2 6 side, the Lipu can be opened through the air flow manhole 2 body 12, and the series action in the Zhapu room 5 is empty. By repeating such a battery system _ = as a fixed output of the pump, for example, for use in burning fruit, the detailed structure of the small-sized system 2 and the common part of the conventional technology attached to the _ effect, The characteristics of the large part of the Ming ellipses (10) are described in detail below. In the following, the present invention is described as follows: 1 1 == The small pump of the present invention is cut longitudinally by the A-A line of the first figure === In the figure, at the bottom 24a of the diaphragm 24 In the center portion, in the same manner, the through hole 6 is opened in the same manner, and then the through hole (3) is opened to open the inhalation valve body 2 to constitute the inhalation valve portion v"
施例中之該吸氣閥體1 2係將隔膜2 4之-部分予以切^ 所設。 另一方面，連通至前述貫穿孔6之具有空氣導入孔7 的軸體2 5 a係突設於前述搖動體2 5之周邊近旁。該軸 肢2 5 a係形成剖面形狀大致工字狀，並於中央部周側面 設有凹部2 5 b。 又’在萷述隔膜2 4之底部2 4 a背面突設有圓筒狀 之中空狀安裝體2 8，更且，該中空狀安裝體2 8之下部 係朝内側折彎成直角，且該折彎部2 8 a係形成可緊緊地 密合嵌接設於前述軸體2 5 a之凹部2 5 b的形狀。 11 200907175 因此，將設於隔膜2 4之前述中空狀安裝體2 8的中 空部密接於前述軸體2 5 a之周侧面，並且使前述折彎部 2 8 a強制地密合嵌接於設在軸體2 5 a之凹部2 5 b藉 以將隔膜2 4安裝於搖動體2 5。此時，由於隔膜2 4係 以前述中空狀安裝體2 8、尤其是折彎部2 8 a咬入設於 轴體2 5 a之前述凹部2 5 b的狀態密合嵌接著，所以在 搖動體2 5搖動時軸體2 5 a完全不會從中空狀安裝體2 8脫離，且軸體2 5 a無論是否已接觸到隔膜2 4之底部 2 4 a背面，該隔膜2 4都不會因軸體2 5 a之上下運動 而直接被按壓。因而，當軸體2 5 a對泵浦室5加壓時， 該軸體2 5 a並不會在設於隔膜2 4之吸氣閥體1 2及該 隔膜2 4之底部中的接觸面發生摩擦，特別可消除吸氣閥 體1 2磨耗破損的缺點。如此，可防止小型泵浦2 1之輸 出降低，並可期待運轉壽命之提高。 另外，本發明只要不脫離本發明之精神仍可作各種的 改變，而且本發明當然可及於該被改變者。 惟，以上所述，僅為本發明最佳之一的具體實施例之 詳細說明與圖式，惟本發明之特徵並不侷限於此，並非用 以限制本發明，本發明之所有範圍應以下述之申請專利範 圍為準，凡合於本發明申請專利範圍之精神與其類似變化 之實施例，皆應包含於本發明之範疇中，任何熟悉該項技 藝者在本發明之領域内，可輕易思及之變化或修飾皆可涵 蓋在以下本案之專利範圍。 【圖式簡單說明】 第一圖係顯示本發明的一實施例，其為小型泵浦之平面圖。 第二圖係沿著第一圖之A—A線所得的剖面圖。 12 200907175 第三圖係習知之小型泵浦的縱剖面圖。 【主要元件符號說明】 1 小型泵浦 2 箱體 2 3 上板 2 b 支撐部 3 隔膜 4 搖動體 5 泵浦室 6 貫穿孔 7 空氣導入孔 7 a 軸體 8 中空狀安裝體 9 旋轉體 10 偏心旋轉轴 11 旋轉驅動轴 12 吸氣閥體 12a 排氣孔 13 環狀凹槽 13a 内壁面 13b 壁面 14 排氣閥體 15 轴環部 19 旋轉體 13 200907175 2 1 小型泵浦 2 2 上箱體 2 3 下箱體 2 4 隔膜 2 4a 底部 2 5 搖動體 2 5a 轴體 2 5b 凹部 2 6 馬達 2 7 空氣流入孔 28 中空狀安裝體 28a 折彎部 Vi 吸氣閥部 V2 排氣閥部In the embodiment, the suction valve body 12 is formed by cutting a portion of the diaphragm 24. On the other hand, the shaft body 25a having the air introduction hole 7 communicating with the through hole 6 is provided in the vicinity of the periphery of the rocking body 25. The axon 2 5 a is formed in a substantially I-shaped cross-sectional shape, and a concave portion 25 5 is provided on a circumferential side surface of the central portion. Further, a cylindrical hollow-shaped mounting body 2 is protruded from the bottom of the bottom portion 2 4 a of the diaphragm 2 4, and the lower portion of the hollow-shaped mounting body 28 is bent inward at a right angle, and The bent portion 2 8 a is formed in a shape that can tightly fit the concave portion 25 5 fitted to the shaft body 25 a. 11 200907175 Therefore, the hollow portion of the hollow-shaped mounting body 28 provided on the diaphragm 24 is in close contact with the circumferential side surface of the shaft body 25 a, and the bent portion 28 a is forcibly tightly fitted and fitted. The diaphragm 2 4 is attached to the rocking body 25 at the recess 2 5 b of the shaft body 2 5 a. At this time, the diaphragm 24 is swayed in such a manner that the hollow mounting body 28, particularly the bent portion 28a, bites into the recessed portion 25b provided in the shaft body 25a, and is swayed. When the body 2 5 is shaken, the shaft body 2 5 a does not detach from the hollow mounting body 28 at all, and the shaft body 2 5 a does not touch the bottom surface of the diaphragm 24 4 or the back side of the diaphragm 24, and the diaphragm 24 does not Directly pressed due to the upper and lower movement of the shaft body 2 5 a. Therefore, when the shaft body 25a pressurizes the pumping chamber 5, the shaft body 25a is not in the contact surface provided in the suction valve body 12 of the diaphragm 24 and the bottom of the diaphragm 24 The occurrence of friction particularly eliminates the disadvantage of the wear and tear of the suction valve body 12. In this way, the output of the small pump 21 can be prevented from being lowered, and the operational life can be expected to be improved. Further, the present invention can be variously changed without departing from the spirit of the invention, and the invention can of course be applied to the subject. However, the above description is only a detailed description of the preferred embodiments of the present invention, and the present invention is not limited thereto, and is not intended to limit the present invention. The scope of the patent application is subject to the scope of the present invention, and any one skilled in the art can easily include it in the field of the present invention. Any changes or modifications considered may be covered by the patents in this case below. BRIEF DESCRIPTION OF THE DRAWINGS The first figure shows an embodiment of the present invention, which is a plan view of a small pump. The second figure is a cross-sectional view taken along line A-A of the first figure. 12 200907175 The third picture is a longitudinal section of a conventional small pump. [Main component symbol description] 1 Small pump 2 Case 2 3 Upper plate 2 b Support portion 3 Diaphragm 4 Shake body 5 Pump chamber 6 Through hole 7 Air introduction hole 7 a Shaft body 8 Hollow mounting body 9 Rotating body 10 Eccentric rotary shaft 11 Rotary drive shaft 12 Suction valve body 12a Exhaust hole 13 Annular groove 13a Inner wall surface 13b Wall surface 14 Exhaust valve body 15 Shaft portion 19 Rotating body 13 200907175 2 1 Small pump 2 2 Upper housing 2 3 lower case 2 4 diaphragm 2 4a bottom 2 5 rocker 2 5a shaft 2 5b recess 2 6 motor 2 7 air inflow hole 28 hollow mounting body 28a bent part Vi suction valve part V2 exhaust valve part