1328497 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種衝擊起子之且 之具、，"構，特別係指一種可有效旋動並 適用於正'反牙螺紋螺固件的衝擊起子。 【先前技術】 按，當德瓣件、㈣亀件，親㈣，乃為螺固 吾人日常生活所用之物品，如家用電器、汽機車等均係以螺固件由 =至大組裝而來’件係藉由螺旋力道迫緊結合物件，其絞拆卸與組 裝的特性，是其被普遍利用的原因之一。 鎖、却螺时需操作_件起子賴手工具，轉_固件起子使螺 固件向零件、機具旋入、或由其中旋出，螺固件之鎖固需拿捏適當的扭力， 作業4究精確性；_件之鬆卸只要持續施力直至其由組裝處脫出為止， 與鎖固作業相形下顯得容易許多，但仍存有特例情況，例如螺固件或組裝 處之螺紋過度絲，或嚴重氧化 '齡，又朗氣簡化崎漲，都會導 致螺固件深陷於崎處之_無法鬆卸，為解決這個情況，料發展出衝 擊起子這種•具’將其抵於_件上，並用_敲擊衝擊奸另一端， 透過敲打所生之_力_麟綠處⑽_件，使其逐漸鬆動而得由 組裝處内卸出；目前市面之衝擊起子結構中，有如美國專利證號6 8 6 〇 1 80 rscrewdriver provided with percussion rnechanisn, to the unfastemng and the fastening 〇f 嫌^，其結構概設有一握把， έ握把端。又有敲擊塊，另一端組設一驅動件，而内部則容設一柄桿， 該柄杯上則設置-敲擊旋轉機構，該敲擊旋轉機構係設有一開有一穿孔的 5 1328497 • 塊插銷、一彈性件及一 v形槽，該插銷係設入移動塊之穿孔内， 該移動塊則抵於彈性件，並令插銷設入v形槽内，藉由上述結構，該衝擊 起子可於.畴件可於敲擊塊受料，姻敲擊旋轉機構向内㈣並連帶朝 單方向旋動，藉此鬆卸螺固件； 」而該衝擊起子文外力打料係以垂直向侧力將起子桿向内縮 入’但該_沿V形槽移動時，必槪向上爬升直至越過V形槽最高點的 轉折處後方能續行向下軸，該V频無法令_直接順勢能作用力的 #反方向帶動起子桿旋動’反而將移動向量折為兩個方向，故當打擊外力較 輕微或者衝擊起子與螺固件所成角度較大時，插銷容易因外力所形成之作 用力不足的if况下，無法跨過該v形槽的轉折處，或者恰好卡在該處而妨 礙了起子桿的旋動，導致對螺固件的鬆卸效果不佳； ▲另外，-般_件為正牙螺固件，也就是順時針旋人、逆時針則旋出， 而k類衝擊起子之驅動件便係於收縮時朝逆時針方向旋動將正牙螺固件旋 出：但許多機械中，例如馬達或風扇的轉軸等，便是利用反牙螺固件組襄， _而4類衝擊起子如遇到反牙_件時，逆時針方向的魏並無法對反牙螺 固件形成鬆卸的作用’故這類衝擊起子絲法適驗反牙獅件上， 其適用性仍嫌不足。 有篮於習用衝擊起子之v形槽結構造成起子桿的旋動效果不佳且益 法適用於反牙觀的_件，故本案㈣人遂著手研朗發—種能克訂 述技術難題的結構，以期能嘉惠所有消費者。 【發明内容】 本發明係提供— 固件的卸效果不佳， 種衝擊起子之具結構’關歧善習赌構鬆對螺 且無法適用於反牙螺紋的螺固件等缺失。 6 1328497 為達成前述目的，本發明之本體係包括一主軸以及一握持件，其中： 該主轴係軸向设有一容置槽，該容置槽係可供一驅動件容設，該主軸 並設有一弧曲部，該弧曲部係與容置槽相連通，該主軸之一端則設有一衝 擊部，該衝擊部係可供承受相當強度之衝擊；該驅動件係配合一彈性件設 入容置槽内，該驅動件並設有一制動體，該制動體係隨驅動件置入容置槽 而設入弧曲部之中； 該握持件設置於主軸之外表面，該握持件係由塑膠射出包覆成型，而 Φ在射出成型前，該主軸可先於弧曲部覆上遮蔽片以防止塑膠原料填入其 中，該握持件對應於主軸之衝擊部的那端，則可設置一高硬度材質的耐擊 部，该财擊部係可承受敲打而不變形，並對衝擊部施以防護作用； 本發明之結構功效在於，該本體以驅動件抵於螺固件上，並以榔頭敲 擊握柄之耐擊部’當耐擊部以致於衝擊部受外力衝擊時，該驅動件便向容 置槽内縮入，且以制動體帶動驅動件於内縮時做順時針旋動，而本體離開 螺固件時，該驅動件則受彈性件推抵而外伸，並連帶將制動體移回弧曲部 鲁-端’故重複上述動作，可賴鬆卸陷於組裝處内之顧件的效果； 本發明之弧曲部能㈣減縣翻外力卿成_力的反方向上移 動，避免制動體沿著軌道做不同方向的轉折移動而影響驅動件旋動的效 果該弧曲部可設置為長弧曲溝或弧曲溝或雙弧曲溝或雙長弧曲溝態樣， 藉由長弧曲溝提供制動體較長的移動距離，俾利制動體於一次衝擊中帶動 驅動件做較多圈的旋動’並減少本體在單次作業中的磨耗丨或藉由弧曲溝 2弧度軌道令觸體有效帶動驅動件旋動，且節·設較長距離軌道所 布化費的時㈣成本；該雙㈣溝與雙長顏溝除各具單—弧曲溝與長弧 優點彳冑可供制動n擇—移動，使驅動件能鬆卸正、反牙的螺固 7 1328497 件； 疋以，本發明:善了 f肖結構所未能克服的技難題，能達到較佳的鬆 卸效果’且綱於正、反牙的_件，誠可謂—種相當具有實祕及進步 性之發明，值付產業界大力推廣，並公諸於社會大眾。 【實施方式】 本發明係有關一種衝擊起子之工具結構，請參閱第一圖至第三圖所 示，該等圖係為本發明第一實施例； 如第一圖，本發明之本體1係包括一主軸1〇以及一握持件2〇 (參照第 三圖），其申： 該主軸10係、軸向中空開有一容置槽U，該容置槽U係可供一驅動件 3〇容設，該主轴1〇胁容置槽n之壁面開設有一孤曲部12，於本實施例 中，該弧曲部12係為一長弧曲溝121，該長弧曲部121係與容置槽u相連 通，該主軸10之一端則設有一硬度較高之衝擊部13，該衝擊部13係可供 承受相當強度之衝擊； 該驅動件30係配合一彈性件40設入容置槽丨丨内，該驅動件3〇並於 近一端的表面設有一凸起之制動體31，該制動體31係隨驅動件3〇置入容 置槽11而設入長弧曲溝121之中，該制動體31能夠藉長弧曲溝121所提 供的更長移動距離帶動驅動件30做較多圈的旋動； 如第一圖與第二圖，該握持件2〇設置於主轴1〇之外表面，並可由塑 膠射出包覆成型’而在射出成型前，該主軸1Q可先於長狐曲溝121覆上遮 蔽片（圖未示）以防止塑膠原料填入其中，該握持件2〇對應於主軸1〇之衝 擊部13的那端，則可設置一高硬度材質（如鐵材質）的耐擊部21，該埘擊部 21係可承受敲打而不變形，並對衝擊部13施以防護作用； 8 1328497 續《月參照第四圖至第六圓所示，該本體i以驅動件3〇抵於螺固件5〇(正 立螺固件)上並以榔頭6〇敲擊握柄之耐擊部當财擊部^以致於衝擊 #13又外力衝擊時’鞠動件3Q便向容置槽11 _人，並以制動體& 順勢朝衝擊外力所形成之_力的反方向沿長弧赠ΐ2ι向上迴繞移動， 猎由制動體31施於長狐曲溝⑵之反作用力帶動驅動件3_縮時同時 旋動’以驅動件30確實的逆時針舰旋動達到鬆卸陷於組裝處内之螺固件 50的效果； -月再配σ參照第七圖所示’該關為本發明第二實施例，其中元件與 關係與第倾例綱者，絲*再贅述，以下魏相聽做說明（以 下實施例亦同，合先敘明）： 該弧曲部12亦可設置為―Μ請，該弧㈣122除以大弧度之執 道提供制動體31移動並帶動驅動件3G旋動外，相較於長弧曲溝⑵為短 的軌道長度也可節省製作的時間與成本；1328497 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an impact driver and a structure, in particular, an impact that can be effectively rotated and applied to a positive 'anti-thread screw. screwdriver. [Prior Art] Press, when the valve, (4) ,, pro (four), is the items used in the daily life of the snails, such as household appliances, steam locomotives, etc. are all assembled with screws from = to large It is one of the reasons why it is commonly used because of the tightening and assembly characteristics of the object by the force of the spiral force. When the lock is locked, the screw needs to be operated. The screwdriver is used to turn the screw to the part or machine, or to be screwed out. ;_The loosening of the piece is as long as it continues to apply until it is released from the assembly. It is much easier to form with the locking work, but there are still special cases, such as threaded filaments in the screw or assembly, or severe oxidation. 'Age, and the simplification of the simplification will lead to the squeezing of the screw in the straits. It is impossible to unload it. In order to solve this situation, it is expected to develop a shock driver, such as 'to be used on the _ piece, and use _ Knocking on the other end of the attack, by tapping the _力_麟绿(10)_ piece, it is gradually loosened and unloaded from the assembly; currently the impact structure of the market is like the US Patent No. 6 8 6 〇1 80 rscrewdriver provided with percussion rnechanisn, to the unfastemng and the fastening 〇f ^ ^, its structure is equipped with a grip, έ grip end. There is a knocking block, the other end is provided with a driving member, and the inside is provided with a handle bar, and the handle cup is provided with a tapping rotation mechanism, and the tapping rotating mechanism is provided with a perforation 5 1328497. a block latch, an elastic member and a v-shaped groove, the latch is disposed in the through hole of the moving block, the moving block abuts the elastic member, and the plug is disposed in the v-shaped groove, and the impact driver is configured by the above structure The domain member can be subjected to the tapping block receiving material, and the ringing mechanism rotates inward (four) and rotates in a single direction, thereby releasing the screw firmware; and the impact driver is externally driven to the vertical side. The force retracts the screwdriver rod inwardly. 'But when the _ moves along the V-shaped groove, it must climb up until it reaches the turning point of the highest point of the V-shaped groove to continue the downward axis. The V-frequency cannot make _ direct homeopathic energy. The force ## in the opposite direction drives the screwdriver rod to rotate' instead of folding the moving vector into two directions. Therefore, when the impact force is slight or the angle between the impact driver and the screw is large, the bolt is easy to be formed by the external force. Under the condition of insufficient, it is impossible to cross the turning point of the v-shaped groove. It just happens to be stuck in the place and hinders the rotation of the screwdriver rod, resulting in poor release of the screw; ▲ In addition, the general-like piece is the orthodontic screw, that is, clockwise rotation, counterclockwise rotation And the driver of the k-type impact driver is rotated counterclockwise when contracting to screw out the positive screw screw: but in many machines, such as the shaft of a motor or a fan, the anti-snail firmware group is used.襄, _ and 4 types of impact screwdrivers, such as when encountering the anti-tooth _ pieces, the counter-clockwise Wei can not form a loosening effect on the anti-snail firmware', so this type of impact screwdriver wire method is suitable for the anti-tooth lion pieces, Its applicability is still insufficient. The v-groove structure with a basket of conventional impact screwdrivers causes the spine effect of the screwdriver rod to be poor and the benefit method is applicable to the anti-tooth view. Therefore, the case (4) is a person who studies and solves the technical problem. Structure, in order to benefit all consumers. SUMMARY OF THE INVENTION The present invention provides that the unloading effect of the firmware is not good, and the structure of the impact driver is such that the snails are loosely snailed and cannot be applied to the screw of the reverse thread. 6 1328497 In order to achieve the foregoing objective, the present system includes a main shaft and a holding member, wherein: the main shaft is axially provided with a receiving groove, and the receiving groove is for receiving a driving member, and the main shaft is An arc-shaped portion is disposed, the arc-shaped portion is in communication with the accommodating groove, and one end of the main shaft is provided with an impact portion, wherein the impact portion is capable of withstanding a relatively strong impact; the driving member is coupled with an elastic member In the accommodating groove, the driving member is provided with a braking body, and the braking system is disposed in the curved portion along with the driving member disposed in the accommodating groove; the holding member is disposed on the outer surface of the main shaft, and the holding member is The plastic injection is overmolded, and before the injection molding, the spindle can be covered with the shielding piece before the curved portion to prevent the plastic material from being filled therein, and the holding member corresponds to the end of the impact portion of the main shaft. Providing a high-hardness material resistant portion, the fortune portion can withstand tapping without deformation, and protect the impact portion; the structural effect of the present invention is that the body is driven by the driving member against the screw, and Hit the grip of the handle with a hammer When the impact portion is impacted by an external force, the driving member is retracted into the accommodating groove, and the driving body is rotated clockwise when the driving body is retracted, and the driving is performed when the body leaves the screw. The piece is pushed out by the elastic member, and the brake body is moved back to the arc-end portion of the arc portion, so the above action is repeated, and the effect of retracting the piece in the assembly portion can be achieved; the curved portion of the invention (4) The county can be moved in the opposite direction of the force _ force to avoid the turning movement of the braking body along the track in different directions and affect the rotation of the driving member. The curved portion can be set as a long curved or curved curved groove. Or a double arc curved groove or a double long curved curved groove pattern, the long arc curved groove provides a long moving distance of the braking body, and the profit braking body drives the driving member to make more rotations in one impact' and reduces The wear of the main body in a single operation or the arc of the arc by the curved arc 2 orbit makes the contact body effectively drive the driving member to rotate, and the time is set for the longer distance of the rail (4) cost; the double (four) groove and In addition to the advantages of each single-curve groove and long arc, the double-long groove n select-moving, so that the driving member can loosen the positive and negative teeth of the screw solid 7 1328497 pieces; 疋, the invention: good technical problems that can not be overcome by the f-Shaw structure, can achieve better loosening effect ' And the outline of the positive and negative teeth, can be described as a kind of invention with considerable real and progressive, valued by the industry to promote, and publicized to the public. [Embodiment] The present invention relates to a tool structure for an impact driver, which is shown in the first to third figures, which are the first embodiment of the present invention; as shown in the first figure, the body 1 of the present invention The utility model comprises a main shaft 1〇 and a holding member 2〇 (refer to the third figure). The main shaft 10 is axially hollow with a receiving groove U, and the receiving groove U is provided for a driving member 3〇. In the embodiment, the curved portion 12 is a long curved curved groove 121, and the long curved curved portion 121 is compatible with the curved surface portion 121. The slot 10 is connected to each other, and one end of the main shaft 10 is provided with a higher impact portion 13 for receiving a relatively strong impact. The driving member 30 is fitted with an elastic member 40 and placed in the receiving groove. In the cymbal, the driving member 3 is provided with a convex braking body 31 on the surface of the proximal end, and the braking body 31 is disposed in the long curved groove 121 along with the driving member 3 〇 inserted into the accommodating groove 11 The braking body 31 can drive the driving member 30 to make more rotations by the longer moving distance provided by the long curved groove 121; In the second figure, the holding member 2 is disposed on the outer surface of the main shaft 1 , and can be overmolded by plastic injection. Before the injection molding, the main shaft 1Q can be covered with the shielding sheet before the long fox groove 121 (Fig. In order to prevent the plastic material from being filled therein, the gripping member 2 is corresponding to the end of the impact portion 13 of the main shaft 1〇, and a hitting portion 21 of a high-hardness material (such as iron) may be disposed. The striking portion 21 can withstand tapping without deformation, and protects the impact portion 13; 8 1328497 Continuation "As shown in the fourth to sixth circles, the body i is driven by the driving member 3 against the screw 5 〇 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正 正With the braking body & the direction of the force formed by the external force of the impact force, the long arc is moved back and forth along the long arc, and the reaction force of the braking body 31 applied to the long fox groove (2) drives the driving member 3_ while rotating Acting 'actual counter-clockwise rotation of the drive member 30 to achieve the effect of loosening the screw 50 in the assembly; σ refers to the second figure shown in the seventh figure, which is the second embodiment of the present invention, in which the components and relationships are the same as those of the first example, and the wire* is repeated, and the following Weixiang listens to the explanation (the following embodiments are also the same, Ming): The curved portion 12 can also be set to "please", the arc (four) 122 divided by a large arc to provide the braking body 31 to move and drive the driving member 3G to rotate, which is shorter than the long arc curved groove (2) The length of the track also saves time and cost of production;
請再參照第人圖至第十圖，該等_本發明第三實施例，如第八圖 該弧曲部12又可設置為—相對成型的—雙弧曲溝123，該雙弧曲溝123 可供制動體31擇-移動；如第九圖，#欲鬆卸反牙的_件時則可先 時針轉動握持件20將驅動件3〇之制動體31轉置弧曲溝腦中，如如 能以驅動件30順時針旋動_件；或如第十圖，當欲鬆卸正牙的螺固件明 刺時針鶴鱗件2_歸3Q之制_31轉置齡正牙螺固件的 曲溝1232中，如此便能以驅動件3〇逆時針旋_固件； 或者如第十-圖至第十三圖所示，該等圖係本發明第四實施例，如負 十-圖，紐曲部12還可設置為相對成型的—雙長弧曲溝124，該錐長弓 曲請與雙弧曲趣—樣，均可供制動體31擇—移動，且該雙^ 9 1328497 T可讓制動龍有更長的移動距離，帶動驅動件3〇在一次敲擊中做 2的旋動；如第十二圖或第十三圖，該雙長狐曲㈣可順時針或逆 2轉動切_體31之所在，藉此於外力衝擊中帶_件3G做順時 十或逆時針旋動以鬆卸反牙或正牙的螺固件。 一"她之功效在於：該長弧曲請具有較長距離，可令制動體&於 -人外力衝擊中帶動驅動件3G做較多_旋動，故能在減少本體丨受衝擊 觸=下快速鬆卸螺固件5G ’縮短驅動件3Q於單次作業中與螺固件5〇接 :耗的次數，相對延長本體使用壽命；該弧曲溝122則以大弧度軌道 ^動體31於移動中帶動驅動體3G旋動，該弧曲溝122在製造時間斑成 3長弧曲軸濟；該雙弧曲溝123與雙長弧曲溝124均可供制動 擇—移動而使驅動件30可鬆卸正、反牙螺固件50，且各具有單一弧 與長弧曲溝121的優點，故本_用弧曲部㈣制動體幻保 寺在外力所形成之作用力的反方向移動，避免制動體31沿著軌道做不同方 =轉折移_影響驅動件3G旋動果，轉者可依照成本或功能考量 選擇該弧曲部12 _態樣中顧者進行生產。 由上所述者僅為用以解釋本發明之較佳實施例，並非企圖據以對本發 明做任何狱，扣，目㈣嶋#了雌有關本發明 之任够飾或變更者，皆減包括在本伽意®賴之範嘴内。 紅上所述，本發明衝擊起子之工具結構在結構設計、使用實用性及成 如上’確實是衫符合產業上發展所需，且簡叙結紐明亦是具 有=斤未有的創新構造，所以其具有「新賴性」應無疑慮，又本發明可較 之習知結構更具功效之增進，因此亦具有「進步性」，其完全符合我國專利 有關發明專利之申請要件賊定，乃依法提起專利申請，並敬請鈞局 1328497 • 早日審查，並給予肯定。 【圖式簡單說明】 第-圖係為本發明衝擊起子之工具結構第一實施例之立體分賴。 第二圖係為本發明第一實施例之外觀立體圖。 第一圖係為第一貫施例由握持部對主軸與驅動件組合之結構透視示意圖。 第四圖至第六圖係為第一實施例之使用狀態連續示意圖。 第七圖係為本發明第二實施例之主軸與驅動件組合之結構透視示意圖。 鲁第八圖係為本發明第三實施例之主轴與驅動件組合之結構透視示意圖。 第九圖與第十圖係為第三實施例制動體轉至不同派曲溝之狀態示意圖。 第十-圖係為本發明第四實施例之主軸與驅動件組合之結構透視示意圖。 • 料—酸第十三®係為第四實細轉至不同長弧曲溝之狀態示意圖。 【主要元件符號說明】 本體1 主轴10 容置槽11 弧曲部12 長弧曲溝121 弧曲溝 122、1231、1232 雙弧曲溝123 雙長弧曲溝124 衝擊部13 握持件20 耐擊部21 驅動件30 制動體31 榔頭60 彈性件40 螺固件50 11Referring to the third to the tenth figure, the third embodiment of the present invention, as shown in the eighth figure, the curved portion 12 can be further configured as a relatively curved-double arc curved groove 123. 123 can be used to select and move the braking body 31; as shown in the ninth figure, when the piece of the tooth is to be loosened, the holding member 20 can be rotated clockwise to rotate the braking body 31 of the driving member 3 into the curved groove. If, for example, the driving member 30 can be rotated clockwise, or as shown in the tenth figure, when the screw to be unloaded or the spur of the orthodontic spurs, the needle scales 2_ return to the 3Q system _31 transposed age snail In the curved groove 1232 of the firmware, the drive member 3 can be rotated counterclockwise _ firmware; or as shown in the tenth to thirteenth drawings, the drawings are the fourth embodiment of the present invention, such as negative ten- In the figure, the curved portion 12 can also be set as a relatively long-curved curved groove 124, which can be selected and moved by the braking body 31, and the double-curve can be selected and moved. 1328497 T allows the brake dragon to have a longer moving distance, driving the drive member 3 to make a 2 rotation in one tap; as in the twelfth or thirteenth, the double long fox (four) can be clockwise or Reverse 2 rotation cut _ body 3 1 where, in the external impact, take the 3G to make a smooth or ten-clockwise rotation to loosen the anti-tooth or orthodontic screw. One " her effect is: the long arc should have a long distance, which can make the brake body & in the external force impact drive the drive member 3G to do more _spin, so it can reduce the impact of the body 冲击= Lower quick release screw firmware 5G 'Short drive member 3Q is connected with screw 5 in a single operation: the number of times consumed, relative to extend the life of the body; the curved groove 122 is in a large arc track During the movement, the driving body 3G is rotated, and the arc curved groove 122 is formed into a long arc crankshaft during the manufacturing time; the double arc curved groove 123 and the double long curved groove 124 are both available for braking-moving to drive the driving member 30. The positive and negative screw firmware 50 can be loosened, and each has the advantages of a single arc and a long arc curved groove 121. Therefore, the arm portion of the arc body (four) is moved in the opposite direction of the force formed by the external force. The braking body 31 is prevented from being different along the track. The turning member _ influences the driving member 3G to rotate the fruit, and the converter can select the person in the arc portion 12 according to cost or function consideration for production. The above is only a preferred embodiment for explaining the present invention, and it is not intended to make any prison, deduction, or (4) 嶋# of the invention relating to the present invention. In the mouth of this Gaga® Lai. According to the red, the tool structure of the impact screwdriver of the present invention has the structural design, the practicality of use, and the fact that the shirt is in conformity with the development of the industry, and the simplified structure is also an innovative structure with no weight. Therefore, its "new dependence" should be undoubtedly considered, and the invention can be more effective than the conventional structure. Therefore, it is also "progressive", which fully conforms to the application requirements of the patents related to Chinese patents. File a patent application in accordance with the law, and please sue the bureau 1328497 • Review it early and give it affirmation. BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a three-dimensional representation of the first embodiment of the tool structure of the impact driver of the present invention. The second drawing is an external perspective view of the first embodiment of the present invention. The first figure is a perspective view of the structure of the first embodiment by the combination of the grip portion and the main shaft and the driving member. The fourth to sixth figures are successive views of the state of use of the first embodiment. The seventh drawing is a perspective view showing the structure of the combination of the main shaft and the driving member according to the second embodiment of the present invention. The eighth figure is a perspective view showing the structure of the combination of the main shaft and the driving member according to the third embodiment of the present invention. The ninth and tenth drawings are schematic views showing the state in which the braking body of the third embodiment is turned to a different curved groove. The tenth-figure is a perspective view showing the structure of the combination of the main shaft and the driving member according to the fourth embodiment of the present invention. • The material-acid thirteenth series is a state in which the fourth solid is transferred to a different long curved groove. [Main component symbol description] Main body 1 Spindle 10 Locating groove 11 Arc portion 12 Long arc curved groove 121 Arc curved groove 122, 1231, 1232 Double arc curved groove 123 Double long curved groove 124 Impact portion 13 Grip 20 Resistant Strike part 21 drive member 30 brake body 31 boring head 60 elastic member 40 screw 50 11