M333277 八、新型說明·· 【新型所屬之技術領域】 本創作係有關一種具護管之接桿工具改良，尤其是一 :。可仏反向替換不同規格型態之工具頭之創新型態設計者 【先前技術】 按，起子接桿為現代工業上不可或缺之工具，而所述 之==接扣末端設具有因應電（氣）驅動工具插套之非圓 Π:，前端設有可供插套起子頭之套接部，而當驅鎖較 ‘％之木螺釘時，因本螺釘之螺紋型態較銳利而不利於 構手中此，相關業界在後續開發的接桿結 '、且破有濩管設計，其中護管可滑動伸縮於接 卜緣’藉由朝前滑推護管以利於護管内緣扶持木螺 ^ 問^點此種習知結構於實際使用經驗中發現仍存在下逃之 另夕!：：者欲替換不同規格尺寸的起子頭插套使用時， ^丰備各式不同型態規格之起子頭備取使用，铁 用者在不同槿★〗 …、而使 的條件下，要場所如高空、爽縫等空間限制 當困難。 適規格的起子頭型態加以替換幾乎相 門發疋：’針對上述習知接桿結構所存在之問題點，★” =種更具理想實用性之創新結構，實： 切企^亦係相關業者須努力研發突破之目標及=所凝 鑑於此’創作人本於多年從事相關產品之製造開發 5 M333277 與設計經驗， «1 終得一確具實 •【新型内容】 、 即’本創 工具改良；其 ‘存在之使用者 '空間限制的條 Φ 換幾乎相當困 而其解決 接件、一伸縮 藉此創新 套接件，而可 先前技術而言 $ 【實施方式】 • 請參閱第 改良之較佳實 申晴上並不受 首先，如 一接桿（ 段（1 2 )及 向端面設有套 (1 5 )徑向 具 利 針對上述之目標’詳加設計與審慎評估後 用性之本創作。 作之主要目的，係在提供一種具護管之接桿 所欲解決之問題點，係針對習知接桿結構所 在不同模式型態的工作場所如高空、爽縫等 件下，要找到合適規格的起子頭型態加以替 難的問題點加以改良突破； 問題之技術特點’主要係藉由一接桿、〜 裝置及一護管相對組設而成； 獨特設計，使本創作之接桿可藉由反向插镇 替換使用不同規袼型態之起子頭使用，對曰 ’可達到使用上的便利之實用進步性。 1〜6圖所示，係本創作具護管之接桿工 施例，惟此等實施例僅供說明之用，在專 此結構之限制。 第1〜6圖所示，其係包括： 1 0 ) ’其係具有二端分別界定為非圓带_ 驅動端（11)，其中該驅動端（ii) )車由 接部（1 7 )，且驅動端（1 1 )之環 w槽 環組有C扣環（1 6 ) ，C扣環（1 6 )史 6 M333277 之定位孔（1 3 4 )於本實施例 形桿段（1 2 ) 裝於接桿（1 〇 中該套接件（2 (22)，且該 1 0 )之定位部 件（2 .0 )之第 部可用以插套不 第一套部（2 1 固組一磁吸件（ 5 0 )以使不易 徑向適處設有活動容伸於套接部（1 7 ) )之疋位部（1 4 )，其中該定位部（1 係為一鋼珠型態，另接桿（1 0 )之非圓 係可供電（氣）動驅動工具插套驅鎖使用 一套接件（2 〇 )，其係可供拆離組 )之套接部（1 7 )以反向置換使用，其 〇)設置有第一套部（21) &第二套部 套接件（2 0 )巾間環狀設有對應接桿（ (14)的卡凹部（23)，其中該套接 -套部（2 1 )及第二套部（2 2 )之内 同規格型態之起子頭（5 0 )使用，且該M333277 VIII. New Description·· 【New Technology Fields】 This creation is about the improvement of a post tool with a protective tube, especially one: An innovative designer who can reversely replace tool heads of different specifications. [Prior Art] Press, the driver post is an indispensable tool in modern industry, and the == buckle end is designed to respond to electricity. The non-circular cymbal of the (gas) driving tool insert: the front end is provided with a socket for inserting the screwdriver bit, and when the lock is more than the '% wood screw, the thread type of the screw is sharp and unfavorable. In the construction of this, the relevant industry in the subsequent development of the joints ', and broken the design of the manifold, in which the protective tube can slide and extend the joint edge of the 'buckle' by sliding forward the protective tube to facilitate the inner edge of the protective tube to support the wood snail ^问^This kind of conventional structure has found that there is still an escape in the actual experience!:: When you want to replace the screwdriver head inserts of different specifications, you can use a variety of different types of screwdrivers. The head is ready for use, and the iron user is in a different situation. It is difficult to make space restrictions such as high altitude and cool seams. The replacement of the appropriate size of the screwdriver head type is almost inconsistent: 'The problem with the above-mentioned conventional post structure, ★" = an innovative structure with more ideal practicability, the real: cut the enterprise ^ is also related The industry must strive to develop the goal of breakthrough and = condensed. In view of this, the creator has been engaged in the manufacturing and development of related products for many years. 5 M333277 and design experience, «1 is truly true. [New content], that is, 'this tool Improvement; its 'user' space limit Φ change is almost quite sleepy and it solves the joint, one telescopic and the innovative socket, but can be used in the prior art. [Embodiment] • Please refer to the improved It is better not to first, such as a post (segment (1 2) and set to the end face (1 5) radial benefit for the above objectives' detailed design and prudent evaluation of the usefulness of the original The main purpose of the work is to provide a problem with the protection of the post, which is to be found under the different working modes of the conventional post structure, such as high altitude and cool seams. Appropriate regulation The problem of the screwdriver's head shape is to improve the problem; the technical characteristics of the problem are mainly composed of a post, a device and a protective tube; the unique design makes the post of the creation It can be replaced by a screwdriver with a different gauge type by reverse insertion, which can achieve the practical progress of the convenience of use. As shown in Figure 1~6, this is a postman with a protective tube. For example, the embodiments are for illustrative purposes only, and are limited by the structure. The figures 1 to 6 include: 1 0) 'The system has two ends defined as non-round bands _ drive The end (11), wherein the driving end (ii)) is connected by the connecting portion (17), and the ring w-ring ring group of the driving end (1 1 ) has a C buckle (16), a C buckle (16) The positioning hole (1 3 4 ) of the history 6 M333277 is mounted on the rod (1 2 ) of the embodiment in the positioning member of the post (1 (22), and the 10) The second part of the 2.0 can be used to insert the sleeve without the first part (2 1 solid group and one magnetic part ( 50 ) so that the radial fit is not suitable for the movement to extend to the socket (1 7 )) Position 1 4), wherein the positioning part (1 is a steel ball type, and the non-circular power supply (gas) of the other pole (10) can be driven to use a set of connectors (2 〇). The sleeve portion (17) of the detachable group is used for reverse displacement, and the first sleeve portion (21) is provided with the first sleeve portion (21) & the second sleeve portion (20). a card recess (23) corresponding to the post ((14), wherein the sleeve-sleeve portion (2 1 ) and the second sleeve portion (2 2 ) of the same type of screwdriver bit (50) Use, and
)及第二套部（2 2 )之相對位置係間隔 24)，俾可反向磁吸所套組之 發生掉落； Q) and the relative position of the second set of parts (2 2 ) is 24), and the reverse magnetic attraction can be dropped; Q
一伸縮裝置（3 0 )，其 位置’其中該伸縮裝置（3 〇 )、彈性件（3 2 )及作動件 3 1 )中央設有穿孔（3 1 1 )預定位置，而固定件（3 1 擔部（3 1 2 )，而作動件（ 3 1 ) ’令作動件（3 3 )對 而作動件（3 3 )之前端内緣 且彈性件（3 2 )係穿伸於固 件（31)之擋部（312) 於彈性件（3 2 ) €，令作動 係固組於接桿（1 〇 )預定 )可為包含有固定件（3丄 (3 3 )，其中該固定件（ )，令以固組於接桿（^ 〇 )之末端外緣係環狀延設有 3 3 )内部設具有穿部（3 應套覆於固定件（3 1)， 楚設有擋止端（332)， 定件（3 1)並擋止於固定 ’復令作動件（3 3 )覆設 件（33)之擋止端 7 M333277 2 )相對擋止於彈性 、”士 3 2 )之另端，當頂推作 3 3 )時’該作動件（3 3 )之擋 動件（ 相對頂撐彈性件（3 2)另面則 -(3 1 W μ ^ %狀悲，设其中，該固定杜 3 i )之延伸端緣更可環設有扣環槽 疋件 、壞槽（3 1 3 )内爭紐右士严r 〇 3 )，而扣 7門甘入組有扣壞（3 4 )，且作動侔Γ ο :内緣環設有對應嵌組扣環（3 4 )之定位槽（ 3 俾使伸縮裝置（3 0 )之初始狀態下，該作動件（3 ·)係與固定件（31)呈彼此定位者； 件（33 鲁 一濩官（4 〇 )，其係滑動套覆於接桿（丄〇 )， 以濩持起子頭（5 〇)所欲鑽設定位之預定木螺釘（6: )’其中該護管（4 Q )内二極限位置分別設有定位斜槽 42)及嵌凹緣（41)，藉由滑動護管（4〇)伸出 接桿（1 0 )驅動端（i丄）時其定位斜槽（4 2 )係定 位於接桿（1 〇 )之c扣環（i 6 )，而收縮護管“： )時其係末端擋止於伸縮裝置（3 〇 )，而護管（4 〇 ) '復加以頂推伸縮裝置（3 〇 )後，藉由伸縮裝置（3 〇 ) 癱受力壓縮俾使接桿（工0)之定位部（^ 4)容伸於護管 (4 0 )之嵌凹緣（4丄）内者。 猎由上述之結構、組成設計，茲就本創作之使用作動 情形說明如下： 當欲利用起子頭（5 〇 )驅鎖木螺釘（6 〇 )時（如 第5 、6圖所示），需先朝前滑推護管（4 n . ^ ^ 、4 〇 )，令護管 I 4 0 )呈拉出狀態，同時該護管（4 υ)之定位斜槽（ 4 2 )對應嵌卡於接桿（i 〇 )之c扣環（3 4 )位置， 以利於護管（4 〇 )之内部管壁護持木^丁（ 6 〇 )定位 8 M333277 .，以不易造成掉落；繼而當接桿（i 〇 ) )螺鎖木螺釘（60)至底限時，該護管（：子頭（5〇 接才干（1 0 )螺鎖推進而呈漸進式朝後滑 々卩藉由 • 4 〇 )末端擋止於伸縮裝置（3 〇 )之揞止山復使遵官（ •位置；再者，欲拆離套接件（2〇)而令其=(332) 1 )之起子頭（50)與第二套部（22) 套邛 〇 )反向插套使用時（如第3、4圖所示）< =子碩（5 .推護管（4 0 )，令護管（4 〇 )末端：需先朝後滑 r Q η、 丁頁推伸縮#罟 (3 0 )之擋止端（3 3 2 ),而使伸縮裝 扁置 播止端（3 3 2 )受力而動作，復令伸縮裝 〇 )之 定位槽（3 3 3 )脫離固定件（3 1 )之扣環（3 :)之 同時使擋止端（3 3 2 )另面相對頂撐彈性件（3 ， 彈性壓縮狀態，藉此，該護管（4 〇 )之々 ）呈 即對位於接桿（1 〇 )之定位部（1 4 ) ^ 以使定位部（ 順利容伸於護管（4 0 )之嵌凹緣（4 "中，俾 使套接件（2 〇 )可順利抽離出接桿（1 、 17)者。 〇)之套接部（ •如第7〜1 1圖所示，係本創作之另一實施例，其中 伸縮裝置（3 0 a )可為前後分別設具有用以固定於接桿 (1 〇 )之固定部（3 1 a )，以及用以彈性頂撐護管（ ^ 〇 )之伸縮部（3 2 a )擋止端（3 3 a )，而該伸縮 裝置（3 〇 a )之固定部（3 1 a )固組於接桿（工〇 ) 之方式可為固定部（3 1 a)内緣環設有嵌部（34 a ) ’而接桿（1 0 )對應伸縮裝置（3 0 a )之嵌部（3 4 a )則設有嵌槽（1 8 )，令伸縮裝置（3 〇 a )之嵌部 9 M333277 (34 a)相對嵌卡於接桿（1 之 相互定位之組態；另該護管（4 Q )之 導滑組裝一滑套（7 0 ) ’其中該滑套 -緣嵌設有迫緊環（71)，前端設有磁 •以利於吸附預定螺件而不易掉落，而護 )之迫緊環（7 1 )則設有導溝段（4 • 7 0 )可供套組於接桿（1 〇 )並令其 ♦後導滑於接桿（1 0 )之導溝段（4 3 • 件反向插套使用時，需先拆離滑套（7 離套組件使用者（如第1 1圖所示）； )於本實施例係一體彎折形成於c扣環 【功效說明】 本創作功效增進之*事實如下： 即，本創作之主要目的，係在提供一種 改良；其所欲解決之問題點，係針對習 之使用者在不同模式型態的工作場所如 限制的條件下’要找到合適規格的起子 乎相當困難的問題點加以改良突破；而 特點，主要係藉由一接桿（1〇)、一 -伸縮裝置（3 0 )及—護管（4丨 此創新獨特設計，使本創作之接桿（1 接套接件（20)，而可替換使用不同 (5 〇 )使用，對照先前技術而言， 嵌槽（1 8 )而得 前端預定位置可為 (7 〇 )之末端内 吸元件（7 2 )， 套相對滑套（7 〇 3 )，俾使ί骨套（ 迫緊環（7 1 )前 );若當拆離套組 0 )，而可順利拆 另該定位部（1 4 (1 6 )之任意端 具護管之接桿工具 知接桿結構所存在 高空、夾縫等空間 頭型態加以替換幾 其解決問題之技術 套接件（2 0 )、 相對組設而成；藉 〇 )可藉由反向插 規格型態之起子頭 達到使用上的便利 10 M333277 之實用進步性。 上述實施例所揭示者係藉以具體説明本創 雖透過特定的術語進行說明，當不能以此限定 之專利範圍；熟悉此項技術領域之人士當可在 之精神與原則後對其進行變更與修改而達到等 而此等變更與修改，皆應涵蓋於如后所述之申 -所界定範轉中。 作，且文中 本新型創作 瞭解本創作 效之目的， 5青專利範圍 【圖 第1 第2 第3 第5 第6 第7 第8 第9 第1 第1 式簡單說明】 圖 第4圖 圖 圖 係 本創 作 接 桿 工 具 之 組 合 立 體 圖 〇 係 本創 作 接 桿 工 具 之 分 解 立 體 圖 0 係 本創 作 替 換 起 子 頭 之 WJ 作 示 意 圖一 起 子頭 之 未拆 離 狀 態 〇 係 本創 作 替 換 起 子 頭 之 動 作 示 意 圖二 起 子頭 之 拆 離 狀 態 〇 係 本創 作 接 桿 工 具 驅 鎖 使 用 之 動 作示 係 顯示 驅 鎖 前 狀 態 〇 係 本創 作 接 桿 工 具 驅 鎖 使 用 之 動 作示 係 顯示 •辱區 鎖 後 狀 態 〇 ’其係顯示 ’其係顯示 思圖一，甘 意圖二，其 施例之纟且合J 施例之分解， 施例之動作5 實施例之動4 圖 圖 圖：係本創作 圖：係本創作 圖：係本創作 〇圖：係本創 1圖：係本創 另一實 另一實 另一實 作另一 作另一實施例之 M333277 【主要元件符號說明】 接桿（1 〇) 非圓形桿段（1 2 ) -定位部（14) 、C扣環（1 6 ) 嵌槽（1 8 ) ~套接件（2 0 ) •第二套部（2 2 ) • 磁吸件（2 4 ) 伸縮裝置（3 0 ) 穿孔（3 1 1 ) 扣環槽（313) 作動件（3 3 ) 擋止端（3 3 2 ) 扣環（3 4 ) 護管（4 0 ) 籲定位斜槽（42) 起子頭（5 0 ) 滑套（7 0 ) 磁吸元件（7 2 ) 伸縮裝置（3 0 a ) 伸縮部（3 2 a ) 嵌部（3 4 a ) 驅動端（1 1 ) 定位孔（1 3 ) 環凹槽（1 5 ) 套接部（1 7 ) 第一套部（2 1 ) 卡凹部（2 3 ) 固定件（3 1 ) 擋部（3 1 2 ) 彈性件（3 2 ) 穿部（3 3 1 ) 定位槽（3 3 3 ) 嵌凹緣（4 1 ) 導溝段（4 3 ) 木螺釘（6 0 ) 迫緊環（7 1 ) 固定部（3 1 a ) 擋止端（3 3 a ) 12a telescopic device (30), wherein the position of the telescopic device (3 〇), the elastic member (3 2 ) and the actuating member 3 1 is provided with a perforation (3 1 1 ) predetermined position, and the fixing member (3 1 The shoulder portion (3 1 2 ), and the actuating member (3 1 ) 'aligns the actuating member (3 3 ) with the inner edge of the front end of the actuating member (3 3 ) and the elastic member (3 2 ) extends through the firmware (31) The blocking portion (312) is disposed on the elastic member (3 2 ), so that the actuating fastening group is fixed on the post (1 〇), and the fixing member (3丄(3 3 ), wherein the fixing member ( ), The outer edge of the end of the fixed rod (^ 〇) is annularly extended. 3 3) The inner portion is provided with a wearing portion (3 should be sheathed to the fixing member (3 1), and the stopping end (332) is provided. ), the fixed piece (3 1) and the stop end of the fixed 'repetitive actuating member (3 3 ) covering member (33), M333277 2) opposite to the other end of the elastic, "3 3" When the top pushes 3 3 ), the stopper of the actuating member (3 3 ) (relative to the top support elastic member (3 2) is the other side - (3 1 W μ ^ % sorrow, set therein, the fixed The extension edge of Du 3 i ) can be equipped with a buckle groove and a bad groove (3 1 3 ) In the competition, the New Yorker is strictly r 〇3), and the deduction of the 7-door Ganjin group has a deduction (3 4), and the action 侔Γ ο: the inner edge ring is provided with a positioning groove corresponding to the inset ring (3 4 ) ( 3 俾In the initial state of the telescopic device (30), the actuating member (3·) is positioned relative to the fixing member (31); the piece (33 鲁一濩官(4 〇), which is a sliding cover In the post (丄〇), to hold the predetermined wood screw (6: ) of the set position of the screwdriver head (5 〇), wherein the second limit position in the protective tube (4 Q ) is respectively provided with a positioning chute 42 And the concave recessed edge (41), the positioning chute (4 2 ) is positioned on the post (1 〇) when the sliding end (4 〇) protrudes from the driving end (i) of the post (10) c buckle (i 6 ), while shrinking the protective tube ":" when the end of the system is blocked by the telescopic device (3 〇), and the protective tube (4 〇) 'receives the push-pull expansion device (3 〇) The positioning portion (^4) of the post (working 0) is accommodated in the recessed edge (4丄) of the protective tube (40) by the compression device (3 〇). Hunting is based on the above structure and composition design. The following is the description of the use of this creation: When you want to use the screwdriver head (5 〇) to unlock the wood screws (6 〇) (as shown in Figures 5 and 6), First, push the protective tube (4 n . ^ ^ , 4 〇) forward, so that the protective tube I 4 0 ) is pulled out, and the positioning chute ( 4 2 ) of the protective tube (4 υ) is correspondingly embedded in The position of the c-ring (3 4 ) of the post (i 〇) is to facilitate the positioning of the inner tube wall of the protective tube (4 〇), and the positioning of 8 M333277 is not easy to drop; When the rod (i 〇) is screwed to the bottom of the screw (60) to the bottom limit, the protective tube (: sub-head (5 〇 才 (1 0) screw lock advances and progressively slides backwards by • 4 〇 ) The end stops at the telescopic device (3 〇) and the mountain is restored to the official position (• position; again, the detachment of the socket (2〇) is made to make it = (332) 1) the screwdriver head (50 ) with the second set (22) 邛〇) when the reverse insert is used (as shown in Figures 3 and 4) < = 子硕 (5. Pushing the tube (4 0), the protective tube (4 〇) End: Need to slide back to the front of the r Q η, Ding page push telescopic #罟 (3 0) The stop end (3 3 2 ), and the telescopic flattened broadcast end (3 3 2 ) is forced to act, and the positioning groove (3 3 3 ) of the retractable mounting device is disengaged from the fixing member (3 1 ) The buckle (3:) simultaneously causes the stopper end (3 3 2 ) to be opposite to the top support elastic member (3, the elastic compression state, whereby the protection tube (4 〇) is located in the opposite direction Positioning part (1 4 ) of the rod (1 〇) so that the positioning part (smoothly fits into the concave edge of the protective tube (40) (4 ", so that the socket (2 〇) can be smoothly pumped The sleeve that is separated from the post (1, 17). 〇) (as shown in Figures 7 to 1 1 is another embodiment of the present invention, wherein the telescopic device (30 a) can be separately Providing a fixing portion (3 1 a ) for fixing to the post (1 〇), and a telescopic portion (3 2 a ) blocking end (3 3 a ) for elastically supporting the protective tube (^ ,), The fixing portion (3 1 a ) of the telescopic device (3 〇a ) is fixed to the post (work), and the inner edge ring of the fixing portion (3 1 a) is provided with the fitting portion (34 a ). The fitting (3 4 a ) of the post (10) corresponding to the telescopic device (30 a) is provided with a recessed groove ( 1 8), so that the fitting portion 9 M333277 (34 a) of the telescopic device (3 〇a) is relatively embedded in the configuration of the post (the mutual positioning of the one; and the sliding of the protective tube (4 Q) is assembled and slipped The sleeve (7 0 ) 'where the sliding sleeve-edge is provided with a pressing ring (71), the front end is provided with magnetic material to facilitate the adsorption of the predetermined screw member and is not easy to fall, and the tension ring (7 1 ) of the protection) A guide groove section (4 • 70) is provided for the sleeve to be placed on the post (1 〇) and its ♦ rear guide is slid over the guide groove section of the post (10) (4 3 • reverse insert sleeve In this case, the user must first remove the sliding sleeve (7 off the sleeve assembly user (as shown in Figure 1);) in this embodiment, the whole body is bent and formed in the c buckle [Effective Description] As follows: That is, the main purpose of this creation is to provide an improvement; the problem to be solved is to find the right size of the screwdriver for the users of different modes of the workplace, such as restricted conditions. The problem is quite difficult to make a breakthrough; and the characteristics are mainly through a post (1〇), a telescopic device (30) and a protective tube (4丨) The unique design makes the post of the creation (1 socket (20), and can be used differently (5 〇). Compared with the prior art, the front end of the slot (18) can be ( 7 〇) the end of the suction element (7 2 ), the sleeve relative to the sliding sleeve (7 〇 3), so that the 骨 bone sleeve (before the compression ring (7 1)); if the detachment of the set 0) Smoothly remove the positioning part (1 4 (1 6 ) of any end of the rod with the protective tool of the pick-up bar structure, such as high-altitude, gap and other space head type to replace the technical sockets to solve the problem (2 0), relative set; borrowing) can be used to reverse the plug-in type of the screwdriver to achieve the convenience of use 10 M333277 practical progress. The disclosures of the above embodiments are intended to illustrate the scope of patents that cannot be limited by the specific terms, and those skilled in the art can change and modify them after the spirit and principles. Such changes and modifications shall be included in the definition of the application as described later. The work of this novel is to understand the purpose of this creation. 5 Qing patent scope [Figure 1st 2nd 3rd 5th 6th 7th 8th 9th 1st 1st simple description] Figure 4 Figure This is a combination of the three-dimensional diagram of the creation of the post tool. This is an exploded view of the creation of the post tool. This is the creation of the replacement of the WJ of the starter. The unfolded state of the sub-head is replaced by the creation of the starter. The detachment state of the head is the action of the splicing tool. The action display shows the state before the lock is unlocked. The action of the creator tool is used to unlock the action. 'The system shows the thoughts of one, the intention of the two, the decomposition of the example and the decomposition of the J example, the action of the example 5 The movement of the embodiment 4 Figure: This is the creation of the picture: the creation of the picture: Department This creative photo: Department of this creation 1 map: the Department of the creation of another real and another implementation of another M333277 as another embodiment [Explanation of main component symbols] Post (1 〇) Non-circular rod section (1 2 ) - Positioning part (14), C buckle (1 6 ) Insert groove (1 8 ) ~ Set Connector (2 0 ) • Second sleeve (2 2 ) • Magnetic member (2 4 ) Telescopic device (3 0 ) Perforated (3 1 1 ) Buckle groove (313) Actuator (3 3 ) Stop end (3 3 2 ) retaining ring (3 4 ) protective tube (4 0 ) call positioning chute (42) screwdriver head (5 0 ) sliding sleeve (7 0 ) magnetic element (7 2 ) telescopic device (3 0 a ) Expansion joint (3 2 a ) Insert (3 4 a ) Drive end (1 1 ) Positioning hole (1 3 ) Ring groove (1 5 ) Socket (1 7 ) First set (2 1 ) Card recess (2 3 ) Fixing piece (3 1 ) Stopping part (3 1 2 ) Elastic part (3 2 ) Wearing part (3 3 1 ) Positioning groove (3 3 3 ) Inserting concave edge (4 1 ) Guide groove section (4 3 ) Wood screw (6 0 ) Tightening ring (7 1 ) Fixing part (3 1 a ) Stop end (3 3 a ) 12