1222373 ⑴ 玖、發明說明 【發明所屬之技術領域】 本發明爲軟式網球及充氣泵浦，特別是\指設於軟式網 球上用來充氣之充氣用橡膠閥的結構、及適用於該充氣用 橡膠閥的充氣泵浦。 【先前技術】 爲了將空氣注入軟式網球而設於軟式網球上的充氣用 橡膠閥，爲具有止回閥的橡膠閥（如日本特開200 1 -1 702 1 5號公報）。 該具有止回閥的橡膠閥是由閥本體、及包覆該閥本體 前端部的止回閥所構成，前述閥本體內，可插入由細長的 中空棒狀材料所形成，並於前端部側面形成排氣孔的充氣 用插入棒，該止回閥可達到允許由貫穿閥本體之插入棒的 孔所排出的空氣注入軟式網球內，並防止軟式網球內的空 氣通過該閥本體朝外部洩漏的效果。而閥本體在柱狀橡膠 材料上，形成有沿著軸方向形成一定寬度之極薄細縫橫跨 內外的結構。 「專利文獻1」，日本特開200 1-170215號公報。 【發明內容】 然而’前述傳統之具有止回閥的橡膠閥，至少是由閥 本體及止回閥兩個構件所構成，額外的組裝步驟是其成本 上揚的重要原因。 -4- (2) (2)1222373 又，由於軟式網球的重量非常的輕，且對於重量有一 定的規範，所以對於網球本身及橡膠閥的重量有一定的限 因此，本發明的目的爲提供一種：具備重量輕且由單 一構件所構成，可充分發揮防止網球內部空氣外洩的封閉 效果之橡膠閥的軟式網球。 本發明的另一個目的，是提供一種可順利將插入棒插 入橡膠閥細縫，並能保持橡膠閥細縫封閉效果的充氣泵浦 〇 可實現本發明目的之軟式網球的結構特徵爲：由球殼 、及形成柱狀的實心橡膠構件所構成，並具有內外端面間 沿著軸方向且接著於該球殻內局部的充氣用橡膠閥，前述 橡膠閥具有：接著於前述球殻內周面的薄壁凸緣部；和從 前述凸緣部朝外側突出，並與形成於前述球殻上小孔形成 卡合的突出部；和在前述突出部外側面形成開口之具有底 部的開口部（盲孔）；和從前述凸緣部朝內側延伸的柱狀 閥本體；以及從前述開口部底面貫穿至前述閥本體內端面 ，形成於前述橡膠閥內的細縫，而前述閥本體形成外徑從 外側朝內側方向漸縮的錐形。 可實現本發明目的之充氣泵浦，是將具有在軸方向上 形成貫通細縫的充氣用橡膠閥固定黏著於球殼內面後，用 來將空氣注入軟式網球的充氣泵浦，其特徵爲具備：在插 入前述橡膠閥內的前端部形成排氣用之孔的插入棒；和安 裝於前述插入棒後端部的泵浦構件；和用來包覆前述可拆 -5- 1222373 Ο) 卸之插入棒的帽蓋構件；及設置於前述帽蓋構件內部，與 前述插入構件的外周面形成接觸以便塗布潤滑劑的潤滑劑 塗敷構件。 【實施方式】 第1圖及第2圖，是顯示本發明第1實施型態之軟式 網球的重點部位透視圖及剖面圖，第3圖爲本發明第2實 施形態之充氣泵浦的重要部位剖面圖。 第1圖及第2圖中的軟式網球1，是利用接著劑以面 向外端部的方式，將橡膠閥3黏著固定在形成於球殻2局 部的小孔2a。而，爲求淸楚地理解橡膠閥3的狀態，故 第1、2圖中未依比例描繪橡膠閥3 (圖中爲放大狀態） ，其實際大小如後述尺寸所示。 橡膠閥3爲單一構件，是由：在外端部的中央具有卡 合於球殻2之小孔2a的突出部3a ;和連接於該突出部3a 的根部形成厚度較薄的凸緣部3b ;及由該凸緣部3b朝內 側形成柱狀閥本體3 c的實心橡膠構件所一體形成。該薄 壁凸緣部3b的外側面可塗敷接著劑。 閥本體3c，形成外徑由外端側朝內側漸縮的錐形。 由於突出部3 a的外形呈現外徑朝外側漸縮的錐形，即使 形成於球殼2之小孔2 a的內徑尺寸不一致，亦可由該錐 形部所塡滿，且該小孔2a的內緣可緊密接著於突出部3 a 的外周，因此該小孔2a的內緣不會產生捲翹的情形。特 別是當小孔2a的內緣形成與突出部3a外徑一致的錐形時 (4)1222373 ，更能防止小孔2a內緣捲翹的情形產生。 有底部的 、孔 3 d， 相彷的刀 ;。該細縫 上。 値爲〇 · 8 g 量單位的 重量單位 丨採用NR 烯橡膠） 35° ) 〇 作生產， ,8 mm，能 的直徑爲 3的長度 flim的寬度 該橡膠閥3，在突出部3 a的中心處形成具 開口部，作爲用來導入充氣泵浦之插入棒的導J 並利用圖面中未顯示，且外形與前述導入孔3d 具貫穿至閥本體3c的內端面3f後形成細縫3e 3 e是形成於橡膠閥3的內部，而非形成於外周面 本實施型態中的橡膠閥3，其總重量的上限 ，由於添加硫的緣故，其添加成分爲低於2個重 黏著劑、1〜5個重量單位的軟化劑、及低於2個 的顏料，並且不採用粉末塡充。而聚合物則單猸 (天然橡膠）、IR (異戊烯橡膠）和BR (丁二 的其中一種或混合物。 而橡膠閥3的橡膠硬度形成3 0 ± 5 ° (低於 橡膠硬度的測量，是採用株式會社島津製作所製 商品名稱爲DurometerA型的橡膠硬計來進行量彳 而，厚度較薄之凸緣部3b的厚度爲0.3〜0. 有效地達成輕量化。 此外，閥本體3 c的外徑形成：大外徑部 5〜10顏、小外徑部的直徑爲3〜8腿，該橡膠閥 則形成5〜1 1 mm。而該細縫3e則形成1 ·0 mm〜3.0 軟式網球與球殼較硬的籃球不同，由於球殼極爲柔軟 ，因此在使用的過程中可觀的衝擊力將作用於橡膠閥，有 時網球拍也會直接拍fc橡膠閥’於是橡膠閥被要求必須能 (5) (5)1222373 承受上述的衝擊且不會洩漏空氣，因此無法直接使用籃球 或排球等硬球殼球類所使用的橡膠閥。 爲了單純地滿足上述的要求，只需地增大橡膠閥、並 增加作用於細縫的彈力來提高細縫的密封性，即使軟式網 球內部的壓力急速的增加也能確保氣密性。而一旦橡膠閥 的硬度過高，細縫將無法獲得高黏附性，使得氣密性也隨 之下降。 此外，一旦增加橡膠閥的重量，將破壞軟式網球整體 的平衡，恐有招致擊球後行進軌道不正常之虞。 上述軟式網球所特有的問題可由本實施型態的橡膠閥 3所解決，藉由從外端朝內側漸縮使本案閥本體3形成錐 狀的外形，可使外徑較小之內端側的材料厚度變薄，這樣 一來便能降低閥本體3 c內端部的剛性，進而使位於該內 端部的細縫3 e具有良好的黏附性。 由於橡膠閥3外端部的材料厚度較厚，所以其剛性較 內端部更高，即使打擊時承受極大的衝擊力也不易產生極 端變形的情形，除了閥本體3c不易產生大量變形之外， 亦可藉由強大的彈力來按壓細縫3 e使其堵塞。 當然，細縫3 e的黏附性可藉由橡膠閥3軸方向上之 橡膠的彈性來獲得，特別是拍擊軟式網球時，由於直徑較 大之外端部側的剛性大於內端部側，故能極力地抑制變形 以降低空氣的洩漏，且由於剛性較外端部側小的內端部側 具有止回閥之容易產生可撓性變形的功能，因此能極力降 低空氣的洩漏。 -8- (6) (6)1222373 此外，在本實施型態中，由於閥本體3 c的外形呈錐 狀外形，故可配合材料厚度薄的凸緣部3 b，有助於減輕 橡膠閥的重量。 其次’當軟式網球1內部的空氣減少時，將充氣泵浦 的插入棒插入橡膠閥3的導入孔3 d，以便撐開細縫3 e直 到該插入棒的前端部由橡膠閥3的內端面3f處突出。 此時，由於軟式網球1的球殼2過於柔軟，且橡膠閥 3與前述充氣泵浦之插入棒間的磨擦甚大，因此必須抓著 依附於球殻2的橡膠閥3，用力地將充氣泵浦的插入棒插 入充氣泵浦3的細縫3 e內。上述的插入動作被認爲容易 導致細縫3 e受損而無法獲得充分的黏附性。此外，用力 抓取橡膠閥3的做法也被認爲將導致球殻2受損。 第2實施型態 第3圖是顯示適合用來對上述第1實施型態之軟式網 球1的橡膠閥3 ’進行充氣之充氣泵浦的實施型態重要部 位剖面圖。 本第2實施型態的充氣泵浦5，是將棒狀的插入棒8 安裝在由橡膠構件形成球形之中空泵浦構件6的前端部， 並於該插入棒8前端部的側面，形成一對成對稱狀的排氣 用孔8a。 而’插入棒8在安裝於泵浦構件6的根部處形成螺紋 部7，並且使包覆插入棒8的帽蓋構件9形成旋緊於該螺 紋部7的狀態。泵浦構件6在其後端部形成有用來吸入空 -9- (7) (7)1222373 氣的孔（圖面中未顯不）’當進行充氣之際，譬如以拇指 的指腹按壓該孔可使泵浦構件6內陷變形，進而使栗浦構 件6內部的空氣注入軟式網球1。 在第2實施型態中，在帽蓋構件9的內面設有已塗敷 矽油等潤滑劑的海綿之類的潤滑劑塗敷構件i 〇，當帽蓋 構件9安裝於插入棒8時，便形成潤滑劑塗敷構件丨〇的 潤滑劑不停對插入棒8進行塗敷的狀態。 因此，當由充氣泵浦5取下帽蓋構件9，並將插入棒 8插入橡膠閥3時，可藉由塗敷於插入棒8外側面之潤滑 劑所產生的潤滑作用，順利地插入橡膠閥3的細縫3 e內 ’並使孔8a貫穿橡膠閥3的內端面3f進入球殼2的內部 〇 當採用上述第2實施型態的充氣泵浦5對第1實施型 態的軟式網球1充氣時，由於插入棒8可順利地插入橡膠 閥3的細縫3 e，故可在軟式網球1輕鬆地由手握持的狀 態下，將插入棒8完全地插入橡膠閥3。 因此，可不採取用力抓取球殼2之容易受損的橡膠閥 3的方法來進行充氣，且由於不會損傷橡膠閥3的細縫3 e ，故能維持細縫3 e所具有的黏附性。 再者，當拔出插入棒8後，由於部份塗敷於插入棒的 潤滑劑會附著於細縫3 e的內周面，能更進一步提高細縫 3 e的黏附性。 在第2實施型態中，插入棒8的外周面經電鍍處理， 其直徑爲〇 · 8〜1 · 2細]，長度爲1 3 mm〜2 0腿，但如上所述地 -10- (8) (8)1222373 ，插入棒8的長度當插入橡膠閥3時，只需其前端的孔 8 a能貫穿橡膠閥3內端面3 f即可。 〔發明的效果〕 根據申請專利範圍第1項所揭示的發明，可望降低橡 膠閥單體的成本，並且防止拍擊軟式網球時的空氣外洩， 進而提供一種可有效輕量化且球的行進路線穩定的軟式網 球。 根據申請專利範圍第2項所揭示的發明，球殼的小孔 內周緣可適當地接著於橡膠閥之突出部的周圍，故能防止 該內周緣產生捲翹的情形。 根據申請專利範圍第3項所揭示的發明，由於充氣用 的插入棒能順利地插入橡膠閥，故不會造成橡膠閥受損導 致黏附性下降，並由於插入棒上的矽油之類的潤滑劑看附 著於細縫上，反而能更進一步提高細縫的黏附性。 【圖式簡單說明】 第1圖 本發明第1實施形態之軟式網球的重點部 位透視圖。 第2圖 第1圖中橡膠閥的剖面圖。 第3圖 本發明第2實施形態之充氣泵浦的重要部 位剖面圖。 〔圖號說明〕 -11 - (9) (9)1222373 1 :軟式網球 2 :球殻 3 :橡膠閥 3 a :突出部 3 b :凸緣部 3 c :閥本體 3 d :導入孔 3 e :細縫 3 f :內端面 5 :充氣栗浦 6 :泵浦構件 7 :螺紋部 8 :插入棒 8 a :孔 9 :帽蓋構件 1 〇 :潤滑劑塗敷構件1222373 玖 发明, description of the invention [Technical field to which the invention belongs] The present invention is a soft tennis ball and an inflatable pump, in particular, \ refers to the structure of an inflatable rubber valve provided on the soft tennis ball for inflation, and is suitable for the inflatable rubber Valve for the aeration pump. [Prior Art] A rubber valve for inflating a soft tennis ball to inject air into the soft tennis ball is a rubber valve having a check valve (eg, Japanese Patent Laid-Open No. 200 1 -1 702 1 5). The rubber valve with a check valve is composed of a valve body and a check valve covering the front end portion of the valve body. The valve body can be inserted into an elongated hollow rod-shaped material and is formed on the side of the front end portion. An air-filled insertion rod forming a vent hole, the check valve can reach the air which allows the air discharged from the hole of the insertion rod penetrating through the valve body to be injected into the soft tennis ball, and prevents the air in the soft tennis ball from leaking to the outside through the valve body. effect. On the other hand, the valve body is formed of a columnar rubber material with extremely thin slits of a certain width across the inside and outside. "Patent Document 1", Japanese Patent Laid-Open No. 200 1-170215. [Summary of the Invention] However, the aforementioned traditional rubber valve with a check valve is composed of at least a valve body and a check valve, and an extra assembly step is an important reason for the increase in cost. -4- (2) (2) 1222373 In addition, since the soft tennis ball is very light and has a certain standard for weight, there is a certain limit on the weight of the tennis ball and the rubber valve. Therefore, the object of the present invention is to provide One type: a soft tennis ball with a rubber valve that is lightweight and consists of a single member, which can fully exert the sealing effect of preventing air leakage from the inside of the tennis ball. Another object of the present invention is to provide an inflatable pump that can smoothly insert an insertion rod into a rubber valve slit and can maintain the sealing effect of the rubber valve slit. The structure of a soft tennis ball that can achieve the purpose of the present invention is: A shell and a column-shaped solid rubber member having a rubber valve for inflating along the axial direction between the inner and outer end faces and then partially inside the ball case, the rubber valve having: A thin-walled flange portion; and a protruding portion protruding outward from the flange portion and engaging with a small hole formed in the spherical shell; and a bottom opening portion (blind) that forms an opening on the outer side surface of the protruding portion Hole); and a cylindrical valve body extending inwardly from the flange portion; and a thin slit that penetrates from the bottom surface of the opening portion to the end face of the valve body and is formed in the rubber valve, and the valve body forms an outer diameter from Tapered tapered from outside to inside. The inflatable pump which can achieve the purpose of the present invention is an inflatable pump for injecting air into a soft tennis ball after a rubber valve having an inflating slit formed in the axial direction is fixedly adhered to the inner surface of the ball case, and is characterized by: Equipped with: an insertion rod having a vent hole formed at a front end portion inserted into the rubber valve; a pump member attached to a rear end portion of the insertion rod; and a removable -5- 1222373 〇) A cap member of an insertion rod; and a lubricant applying member provided inside the cap member and in contact with an outer peripheral surface of the insert member to apply a lubricant. [Embodiment] Figs. 1 and 2 are perspective views and cross-sectional views of a key part of a soft tennis ball according to a first embodiment of the present invention. Fig. 3 is an important part of an inflatable pump according to a second embodiment of the present invention. Sectional view. In the soft tennis 1 shown in Figs. 1 and 2, the rubber valve 3 is adhered and fixed to the small hole 2a formed in the round part of the ball case 2 by using an adhesive so as to face outwardly. However, in order to understand the state of the rubber valve 3 clearly, the rubber valve 3 is not drawn to scale in the first and second figures (the enlarged state is shown in the figure), and its actual size is shown in the size described later. The rubber valve 3 is a single member, which is composed of: a protruding portion 3a having a small hole 2a engaged with the spherical shell 2 in the center of the outer end portion; and a thin portion of the flange portion 3b connected to the root portion of the protruding portion 3a; It is integrally formed with a solid rubber member in which a columnar valve body 3 c is formed inward from the flange portion 3 b. An adhesive may be applied to the outer surface of the thin-walled flange portion 3b. The valve body 3c is formed in a tapered shape in which the outer diameter is tapered from the outer end side toward the inside. Since the outer shape of the protruding portion 3 a is tapered to the outside diameter, even if the internal diameter of the small hole 2 a formed in the spherical shell 2 is not the same, it can be filled by the tapered portion, and the small hole 2 a The inner edge of can be closely adhered to the outer periphery of the protruding portion 3 a, so the inner edge of the small hole 2 a does not cause curling. In particular, when the inner edge of the small hole 2a is formed into a tapered shape consistent with the outer diameter of the protruding portion 3a (4) 1222373, the inner edge of the small hole 2a can be prevented from curling. There is a hole at the bottom, 3 d, and a similar knife ;. The slit.値 is a weight unit of 8 g. 丨 NR rubber is used. 35 °) 〇 Production, 8 mm, the diameter of the length of the width of the flim 3, the rubber valve 3, in the center of the protrusion 3 a An opening is formed at each place as a guide J for introducing an insertion rod for an air pump, and is not shown in the drawing, and the shape and the introduction hole 3d are penetrated to the inner end surface 3f of the valve body 3c to form a slit 3e 3 e is formed inside the rubber valve 3, rather than the rubber valve 3 in this embodiment. The upper limit of the total weight of the rubber valve 3 is less than two heavy adhesives due to the addition of sulfur. 1 to 5 weight units of softener and less than 2 pigments, and powder filling is not used. The polymer is one or a mixture of fluorene (natural rubber), IR (isoprene rubber), and BR (butadiene. The rubber hardness of the rubber valve 3 forms 30 ± 5 ° (below the measurement of rubber hardness, It is measured by using a durometer A type rubber durometer manufactured by Shimadzu Corporation, and the thickness of the thin flange portion 3b is 0.3 to 0. In addition, the weight of the valve body 3 c is effectively reduced. Outer diameter formation: the diameter of the large outer diameter part is 5 to 10, the diameter of the small outer diameter part is 3 to 8 legs, the rubber valve is formed to 5 to 11 mm, and the narrow slit 3e is formed to 1.0 mm to 3.0 soft type Tennis is different from basketball with a hard shell. Because the shell is extremely soft, a considerable impact force will act on the rubber valve during use. Sometimes tennis rackets will also directly shoot the fc rubber valve. Therefore, the rubber valve is required to be required. (5) (5) 1222373 can withstand the above-mentioned impact without leaking air, so it is not possible to directly use the rubber valve used for hard ball shell balls such as basketball or volleyball. To simply meet the above requirements, simply increase the rubber Valve and increase the impact on the slit To improve the tightness of the seam, even if the pressure inside the soft tennis ball increases rapidly, it can ensure the air tightness. Once the hardness of the rubber valve is too high, the fine seam will not be able to obtain high adhesion and the air tightness will be reduced accordingly. In addition, once the weight of the rubber valve is increased, the overall balance of the soft tennis will be disrupted, and there is a risk that the track will not be normal after hitting the ball. The above-mentioned problems specific to soft tennis can be solved by the rubber valve 3 of this embodiment. The tapered shape of the valve body 3 in this case is formed by tapering from the outer end to the inner side, which can reduce the thickness of the material on the inner end side with a smaller outer diameter, so that the inner end portion of the valve body 3 c can be reduced. Rigidity, so that the fine slit 3 e located at the inner end portion has good adhesion. Because the material thickness of the outer end portion of the rubber valve 3 is thicker, its rigidity is higher than that of the inner end portion, even if it is subjected to great impact during impact Force is not easy to cause extreme deformation. In addition to the valve body 3c is not easy to produce a large amount of deformation, it can also be pressed by a strong elastic force to block the thin slit 3e. Of course, the adhesion of the thin slit 3e can be achieved by The elasticity of the rubber in the 3-axis direction of the rubber valve is obtained. Especially when slamming a soft tennis ball, the outer end side is larger than the inner end side due to its larger diameter, so it can minimize deformation to reduce air leakage. And because the inner end side, which has less rigidity than the outer end side, has the function of easily deforming the check valve, it can minimize air leakage. -8- (6) (6) 1222373 In addition, In the implementation type, since the outer shape of the valve body 3 c is a tapered shape, the flange portion 3 b with a thin material thickness can be used to help reduce the weight of the rubber valve. Secondly, when the air inside the soft tennis 1 is reduced. Insert the insertion rod of the air pump into the introduction hole 3 d of the rubber valve 3 so as to open the slit 3 e until the front end of the insertion rod protrudes from the inner end surface 3 f of the rubber valve 3. At this time, because the ball case 2 of the soft tennis 1 is too soft, and the friction between the rubber valve 3 and the insertion rod of the aforementioned air pump is very large, it is necessary to hold the rubber valve 3 attached to the ball case 2 and force the air pump The pump insertion rod is inserted into the slit 3 e of the air pump 3. The above-mentioned insertion operation is considered to easily cause damage to the slit 3e and fail to obtain sufficient adhesion. In addition, the practice of grasping the rubber valve 3 with force is considered to cause damage to the ball housing 2. Second Embodiment FIG. 3 is a cross-sectional view of an important part of an embodiment of an inflation pump suitable for inflating the rubber valve 3 'of the soft tennis ball 1 of the first embodiment. The inflating pump 5 according to the second embodiment is a rod-shaped insertion rod 8 attached to a front end portion of a spherical hollow pump member 6 formed by a rubber member, and a side surface of the front end portion of the insertion rod 8 is formed. The exhaust holes 8a are symmetrically formed. On the other hand, the 'insert rod 8 is formed with a threaded portion 7 attached to the root of the pump member 6, and the cap member 9 covering the insertion rod 8 is screwed onto the threaded portion 7. The pump member 6 is formed with a hole (not shown in the drawing) for sucking air-9- (7) (7) 1222373 in the rear end portion thereof. 'When inflating, for example, press the The holes can deform the pump member 6 inwardly, thereby injecting the air inside the Kuriura member 6 into the soft tennis 1. In the second embodiment, the inner surface of the cap member 9 is provided with a lubricant coating member i 0 such as a sponge that has been coated with a lubricant such as silicone oil. When the cap member 9 is attached to the insertion rod 8, Thus, a state in which the lubricant of the lubricant applying member 11 is continuously applied to the insertion rod 8 is formed. Therefore, when the cap member 9 is removed by the inflator pump 5 and the insertion rod 8 is inserted into the rubber valve 3, the rubber can be smoothly inserted by the lubricating effect of the lubricant applied to the outer surface of the insertion rod 8. The slit 3e of the valve 3 is inside and the hole 8a penetrates the inner end surface 3f of the rubber valve 3 and enters the inside of the ball housing 2. When the above-mentioned second embodiment of the inflatable pump 5 is used for the soft tennis of the first embodiment 1 When inflating, the insertion rod 8 can be smoothly inserted into the slit 3e of the rubber valve 3, so the insertion rod 8 can be fully inserted into the rubber valve 3 while the soft tennis ball 1 is easily held by the hand. Therefore, the method of inflating the easily damaged rubber valve 3 of the ball housing 2 without using a strong grip can be used for inflation, and the thin seam 3 e of the rubber valve 3 is not damaged, so the adhesion of the thin seam 3 e can be maintained. . Furthermore, after the insertion rod 8 is pulled out, since the lubricant applied to the insertion rod partially adheres to the inner peripheral surface of the slit 3e, the adhesion of the slit 3e can be further improved. In the second embodiment, the outer peripheral surface of the insertion rod 8 is electroplated and has a diameter of 0.8 to 1.2 thin] and a length of 13 mm to 20 legs, but as described above -10- ( 8) (8) 1222373, the length of the insertion rod 8 when inserting the rubber valve 3, it is only necessary that the hole 8a at the front end can penetrate the inner end surface 3f of the rubber valve 3. [Effects of the Invention] According to the invention disclosed in the first patent application scope, it is expected that the cost of the rubber valve alone can be reduced, and air leakage during the slap of a soft tennis ball can be prevented, thereby providing a lightweight and efficient ball travel. Soft tennis with stable course. According to the invention disclosed in item 2 of the scope of the patent application, the inner peripheral edge of the small hole of the ball case can be appropriately connected to the periphery of the protruding portion of the rubber valve, so that the inner peripheral edge can be prevented from curling. According to the invention disclosed in item 3 of the scope of the patent application, since the insertion rod for inflation can be smoothly inserted into the rubber valve, the rubber valve is not damaged and the adhesion is reduced, and a lubricant such as silicone oil on the insertion rod is not used. It can be seen that the adhesion to the slits can further improve the adhesion of the slits. [Brief Description of the Drawings] FIG. 1 is a perspective view of a key part of a soft tennis ball according to a first embodiment of the present invention. Figure 2 Sectional view of rubber valve in Figure 1. Fig. 3 is a sectional view of an essential part of an air pump according to a second embodiment of the present invention. [Illustration of drawing number] -11-(9) (9) 1222373 1: Soft tennis 2: Ball case 3: Rubber valve 3 a: Protrusion 3 b: Flange 3 c: Valve body 3 d: Introduction hole 3 e : Slit 3 f: Inner end face 5: Inflatable Kuriura 6: Pump member 7: Threaded portion 8: Insertion rod 8 a: Hole 9: Cap member 1 〇: Lubricant coating member