财22896 五、新型說明： 【新型所屬之技術領域】 本創作係關於一種旅行箱或行李箱的技術領域，特別 疋配置在旅行箱或行李箱上的伸縮式拉桿。 .. 【先前技術】 ·« 一般大容積的旅行箱、行李箱或是學生用的拖拉式書 包，其因為體積與重量皆較大，不方便且不容易直接手提 ' 移動，因此皆會配有滾輪與把手，藉此方便使用者施力拖 • 拉移動。 由於箱體的大小並非固定，而且使用者者身高也不相 同，因此在使用的匹配上便會產生很大的變化，所以若使 用固定式的轉，對使用者而言並非最佳的使用結構。 : 目前的拉桿設計都具有伸縮方式，而且彼此間的差異 皆在在於控制拉桿伸縮動作的卡制裝置或卡制機構。 有將拉桿設計成可以自動升降。例如台灣專利娜m號 φ即揭示-種具有電動升降拉桿之旅行箱。然而該專利案的 設計中需包含馬達、從動元件等機構，顯然佔必須再增加 箱體的體積。 另外台灣專利M347G8G號揭示—種旅行箱多段式拉桿 之彈出裝置；其主要具有雙彈跳系統，其中第一、二彈子 、頭間的主彈跳系統提供拉桿彈出箱體，外管底部之=彈跳 系統則具避震及消音功效者。然而其結構相當複雜，生產 時的組立不方便。 【新型内容】 3 本創作的目的在於提供一 構精簡、操作容县彳縮拉柃結構，其具有結 操作合易、組立簡便及動作順揚之功效。 根據上述的目的與功效， 串接的第—捍管、第2作揭不的拉捍結構包含 第一卡制裝置桿㈣—端配接一 -第-活動片盘二桿管内，該第一卡制裝置具有 於第Μ鋼珠’並m位鋼珠卡制 移杯相壁面；當第—活動片動受-壓桿驅動產生位 則該第-定位鋼珠可以落入第一活動片的第一凹穴内 蚀μ解除第一定位鋼珠與第二桿管的卡制狀態，進而可以 第才干管與第-卡裝置移動而收縮於第二桿管内，或自 第二桿管内拉出。 同樣的β又冲原理，可在第二桿管的一端配接一個第二 制裝置’且第二桿管與第二卡制裝置的組合可穿置在一 第二桿管内；當第一卡制裝置壓置在第二卡制裝置上，可 除第二卡制裝置與第三桿管間的卡制狀態，進而第-梓管、第一卡制裝置、第二桿管及第二卡制裝置可以收縮 於第二桿管内；與當第一卡制裝置與第二卡制裝置分開， 則第二桿管及第一桿管可以逐次自第三桿管内被拉出。 上述的第一卡制裝置與第—制裝置具有相同的動作 動原理’然而第二卡制裝置具有一第二活動片搭配第二定 位鋼珠及第三定位鋼珠。 以下即依本創作的目的、功效及結構組態，舉出較佳 實施例，並配合圖式詳細說明。 【實施方式】 M422896 請參閱第1圖，拉桿（10)的一端係可以組設在一底座 (20)上。至於拉桿（1〇)與底座（2〇)則與一個箱體（未顯示） 結合。 該拉桿（10)係包含一個第一桿管（丨2)及一個第二桿管 (14)。第一才干管（12)與第二桿管的（14)的轴向為中空構造。 > 第一桿管（12)的一端配接一個第一卡制裝置（30)，該 • 第一桿管（12)與第一卡制裝置（30)的組合伸入第二桿管（1 - 4)的轴向内部，使得第一桿管（12)與第二桿管（14)形成串 鲁 接結合的形式。 又一壓桿（16)係組設在第一桿管（12)的轴向内部，且 壓捍桿（16)的一端對應第一卡制裝置（3〇)。 第一卡制裝置（30)係具有一第一座體（32)，且第一座 '體（32)具有一貫穿構造的第一珠孔（34);又一第一活動片 (36)搭配彈簧（38)而彈性活動地組設在第一座體（32)上； 第一活動片（36)的表面具有一第一凹穴（42);其次一第一 _ 疋位鋼珠（44)，其配置在該第一珠孔（34)中。 在第一活動片（36)未受到壓桿（16)的施力驅動時，第 一定位鋼珠（44)可受第一凹穴（42)的周邊位置（42a)的推 迫而凸出第一珠孔（34)，進而卡嵌在第二桿管（14)的第一 ·>定位孔（14a)。如此可使第一卡制裝置（30)與第二桿管（14) '形成卡制狀態，而第一桿管（12)與第二桿管（14)不產生相 對位移。 請參閱第2圖，當使用者壓動壓桿（16)，則壓桿（16) 會施力於第一活動片（36)促使其產生位移，此時第一活動 5 片（36)上的第—凹穴（42)會對應第—定位鋼珠（⑷；如此 第疋位鋼珠（44)可以落入第一凹穴⑷）内，而使得第一 卡制裝置（3G)與第二桿管（⑷不具有卡制效果。因此壓桿 (16)及第-桿管⑽與第-卡制裝置⑽）的組合可以沿著 第二桿管（14)的軸向位移形成收縮動作。 請參閱第3圖，當座桿（16)、第一桿管⑽與第一卡 制裝置（3G)在第二桿管（⑷内移動，且第一卡制裝置⑽） 的第一定位鋼珠（44)對應第二桿管（⑷的第二^位孔⑽ )時，使用者可以釋放按壓於壓桿（16)上的作用力。 4參閱第4圖，使用者可放按壓於壓桿（16)上的作用 力後第’舌動片（36)在彈簧（38)的作用下會向上位移， 進而第-定位鋼珠⑽會受到第1穴⑽的周邊位置（4 2a)推頂而凸出卡嵌於第二桿管（14)的第二定位孔（i4b)， 進而使得第-桿管⑽收縮於第二桿管（⑷内且形成定位 狀態。 至於第-杯管（12)自第二桿管（⑷内抽出的操作與動 作，則為前述的逆操作與逆動作。 4參閱第5目，關於第一卡制裝置⑽）的第一活動片 (36)與第座體（32)結合結構，係可以在第一活動片（⑽） 的底部延伸出至少一個勾扣部（36a)，且該勾扣部（36a)穿 過第一座體（32)的擋緣（32a)相對應；如此第一活動片（36) 受彈簧（38)向上推，可因勾扣部（36 a)與擋緣（32a)相抵 ，而使得第一活動片（36)不會脫離第一座體（32)。 請參閱第6圖，圖中顯示第二桿管（14)的一端配接一 M422896 個第二卡制裝置（50)，且第二桿管（14)與第二卡制裝置（50) 的組合穿置於一第三桿管（18)内。 第6圖所顯示的結構僅顯示整個拉桿結構中的一部 份，故第一桿管（12)、第一卡制裝置（30)及第二桿管（14) 的組合組態未加以顯示，但第一桿管（12)、第一卡制裝置 (30)及第二桿管（14)的組合組態與前述相同，在此不重覆 說明。 第二卡制裝置（50)由一第二座體（52)、一第二活動片 φ (54)、第二定位鋼珠（56)、第三定位鋼珠（58)及一彈簧（62) 所組成。 具體而言，第二座體（52)上具有貫穿的第二珠孔（52a )及第三珠孔（52b)供容置第二定位鋼珠（56)及第三定位鋼 V 珠（58)。該第二珠孔（52a)與第三珠孔（52b)位於第二座體 (52)相對二侧面上，因此第二定位鋼珠（56)與第三定位鋼 珠（5 8)不在同一側。 第二活動片（54)搭配彈簧（62)形成可彈性活動的組設 * 在第二座體（52)。進一步而言，第二活動片（54)具有一第 二凹穴（54a)及一第三凹穴（54b)，且第二凹穴（54a)與第三 凹穴（54b)對應第二定位鋼珠（56)及第三定位鋼珠（58)。 其次第二活動片（54)與第二座體（52)的組合組態可與 -> 第一活動片（36)與第一座體（32)的組配方式相同。 在未受操作或操作未及第二卡制裝置（50)時，第二定 位鋼珠（56)受到第二凹穴（54a)的周邊位置（54c)的推項而 凸出，且第二定位鋼珠（56)卡嵌於第三桿管（18)上的第三 7 M422896 定位孔（18a)。換言之，第二桿管（14)與第三桿管（18)藉第 一卡制裝置（50)而形成卡制狀態。至於第三定位鋼珠（58) 則對應第三凹穴（54b)，且與第三桿管（18)未形成卡制狀 態。 請參閱第7圖，在上述的說明内容中已知，壓桿（16) ^用於第一卡制裝置(3〇)可使第一桿管⑽收縮於第二桿 管（14)内。而當第一卡制裝置（3〇)移動到第二桿管（14)的 底。卩時，第一卡制裝置（3〇)會觸及第二卡制裝置（5〇)的第 籲二活動(54) ’例如以第-卡制裝置（30)的底面觸及第二 1動片（54)，或是在第一卡制裝置（3〇)的底面形一個觸動 桿（未顯示）以觸及第二活動片（54)。 第二活動片（54)受到第一卡制裝置（3〇)的壓置作用會 "產生位移，進而使第二定位鋼珠（56)離開第三桿管（μ)上 的第三定位孔（18a)而落入第二凹穴（54a)内。如此第二卡 制裝置（50)與第三桿管（18)便不具有卡制狀態。 瞻疋以在第7圖所顯示的狀態下，壓桿（丨6)、第一桿管 (12)、第一卡制裝置（3〇)、第二桿管（14)及第二卡制裝置 (50)可以同收縮進入第三桿管（18)的内部空間。並且接 近第三桿管（18)的第四定位孔（18b)。特別的是第三定位 々孔（18a)與第四定位孔（18b)位在相對的侧面上。 - 請參閱第8圖，壓桿（16)、第一桿管（12)、第一卡制 裝置(30)第一才干管(⑷及第二卡制裝置(5〇)朝第三桿管 〇8)底部移動，且第三定位鋼珠（58)對應第四定位孔（18b) 時’使用者再略施按屢作用力，第一卡制裝置（30)再驅動 8 M422896 第二活動片（54)產生一段位移，則該第三定位鋼珠（58)受 到第三凹穴（54b)的周邊位置（54d)的推頂而凸出，並且卡 嵌在第四定位孔（18b);其次，使用者釋放壓桿（16)上的作 用力，則第一定位鋼珠（44)會受到第一凹穴（42)的周邊位 置（42a)推頂而凸出卡嵌於第二桿管（14)的第二定位孔 (14b)。 如此第一桿管（12)呈定位狀，而第二卡制裝置（50)的 第二活動片（54)雖然具有向上彈起的趨勢，但因第一桿管 φ (12)底部的第一卡制裝置（30)無法位移，所以第二活動片 (54)無法產生位移。換言之，第三定位鋼珠（58)與第四定 位孔（18 b)形成卡制作用，使得第二桿管（14)收縮且定位於 第三桿管（18)内。 人 至於第一桿管（12)與第二桿管（14)的伸出操作與動作 ""，係為前述收縮狀態的逆操作與逆動作。 根據以上所述，第一卡制裝置（30)與第二卡制裝置（50) I 的結構精簡，所以其組立及操作均非常方便；其次，本創 作以第一定位鋼珠（44)、第二定位鋼珠（56)及第三定位鋼 珠（58)的配置位置，搭配第二桿管（14)與笫三桿管（18)形 成簡單的定位孔，便可以使各桿管達到伸縮與定位，故滿 足操作簡便與操作順暢的功效。 -"v 以上乃本創作之較佳實施例以及設計圖式，惟較佳實 施例以及設計圖式僅是舉例說明，並非用於限制本創作技 藝之權利範圍，凡以均等之技藝手段、或為下述「申請專 利範圍」内容所涵蓋之權利範圍而實施者，均不脫離本創 9 M422896 作之範疇而為申請人之權利範圍。 【圖式簡單說明】 第1圖係本創作第-桿管與第二桿管的組合結構示意圖。 第2圖係本創作第一桿管收縮於第二桿管内的動作示意圖 — 〇 第3圖係本創作第-桿管收縮於第二桿管内的動作示意圖 二 0 S 4圖係本創作第-桿管收縮於第二桿管内的動作示 • 三。 第5圖係本創作第一卡制裝置的結構示意圖。 第6圖係本創作第二桿管與第三桿管的組合結構示意圖。 第7圖係本創作第-桿管、第二桿管收縮於第三桿管内的 •v 動作示意圖一。 /第8圖係本創作第-桿管、第二桿管收縮於第三桿管内的 動作示意圖二。 I 【主要元件符號說明】 (10)拉桿 (14)第二桿管 (14b)第二定位孔 (18)第三桿管 -V (18b)第四定位孔 (30)第一卡制裝置 (32a)擋緣 (36)第一活動片 (12)第一桿管 (14a)第一定位孔 (16)壓桿 (18a)第三定位孔 (20)底座 (32)第一座體 (34)第一珠孔 (36a)勾扣部 M422896 (38)彈簧 (42a)周邊位置 (50)第二卡制裝置 (52a)第二珠孔 (54)第二活動片 (54b)第三凹穴 (54d)周邊位置 (58)第三定位鋼珠 (42)第一凹穴 (44)第一定位鋼珠 (52)第二座體 (52b)第三珠孔 (54a)第二凹六 (54c)周邊位置 (56)第二定位鋼珠 (62)彈簧 11Finance 22896 V. New Description: [New Technology Area] This creation is about a technical field of suitcases or suitcases, especially telescopic rods arranged on suitcases or suitcases. .. [Prior Art] ·« Generally, large-capacity suitcases, suitcases, or drag-and-drop bags for students are large in size and weight, inconvenient and not easy to carry directly by mobile, so they are equipped with The roller and the handle are convenient for the user to apply force to pull and pull. Since the size of the box is not fixed and the height of the user is different, there is a great change in the matching of the use. Therefore, if a fixed type of rotation is used, it is not the best use structure for the user. . : The current drawbar designs are all telescopic, and the difference between them is in the clamping device or the clamping mechanism that controls the telescopic movement of the drawbar. The lever is designed to be automatically raised and lowered. For example, the Taiwan patent Na m φ reveals a suitcase with an electric lifting rod. However, the design of the patent case needs to include a motor, a driven component, and the like, which obviously requires an increase in the volume of the casing. In addition, the Taiwan patent M347G8G reveals an ejecting device for a multi-section trolley of a suitcase; it mainly has a double bouncing system, wherein the main bouncing system between the first and second marbles and the head provides a pull rod ejecting body, and the bottom of the outer tube is a bouncing system. It is a shock absorber and silencer. However, its structure is quite complicated and it is inconvenient to assemble at the time of production. [New Content] 3 The purpose of this creation is to provide a streamlined structure for the operation of Rong County, which has the functions of easy operation, easy assembly and smooth movement. According to the above-mentioned purpose and effect, the first-in-one tube of the tandem connection and the second-hand structure of the second clamping device include a first clamping device rod (four)-end mating one-first-active disc two-bar tube, the first The clamping device has a wall surface of the third cup steel ball and the m-position steel ball is clamped; when the first movable piece is driven by the pressure bar, the first positioning steel ball can fall into the first concave surface of the first movable piece The internal eclipse μ cancels the locking state of the first positioning steel ball and the second rod tube, and can be moved into the second rod tube by the movement of the first tube and the first card device, or pulled out from the second rod tube. The same β-punching principle, a second device can be coupled to one end of the second rod tube and the combination of the second rod tube and the second clamping device can be placed in a second rod tube; when the first card The device is pressed on the second clamping device to remove the locking state between the second clamping device and the third rod tube, and then the first tube, the first card device, the second rod tube and the second card The device can be contracted into the second rod tube; and when the first clamping device is separated from the second clamping device, the second rod tube and the first rod tube can be pulled out from the third rod tube one by one. The first carding device described above has the same operational principle as the first device. However, the second carding device has a second movable piece with the second positioning ball and the third positioning ball. The following is a description of the preferred embodiments of the present invention in accordance with the purpose, function and structural configuration of the present invention. [Embodiment] M422896 Please refer to Fig. 1. One end of the tie rod (10) can be assembled on a base (20). As for the tie rod (1〇) and the base (2〇), it is combined with a case (not shown). The tie rod (10) comprises a first rod tube (丨2) and a second rod tube (14). The axial direction of the first trunk pipe (12) and the second pipe pipe (14) is a hollow structure. > One end of the first rod tube (12) is coupled with a first clamping device (30), and the combination of the first rod tube (12) and the first clamping device (30) extends into the second rod tube ( The axial interior of 1 - 4) is such that the first rod tube (12) and the second rod tube (14) form a string-joint combination. Another pressing rod (16) is disposed inside the axial direction of the first rod tube (12), and one end of the pressing rod (16) corresponds to the first clamping device (3〇). The first clamping device (30) has a first seat body (32), and the first seat body (32) has a first bead hole (34) in a penetrating configuration; and another first movable piece (36) The first movable body (38) is elastically movably assembled on the first seat body (32); the first movable piece (36) has a first recess (42) on the surface; and the first first 疋 position steel ball (44) ), which is disposed in the first bead hole (34). When the first movable piece (36) is not driven by the urging force of the pressing rod (16), the first positioning steel ball (44) can be pushed by the peripheral position (42a) of the first recess (42) to protrude. A bead hole (34) is then inserted into the first > positioning hole (14a) of the second rod tube (14). Thus, the first clamping device (30) and the second rod tube (14)' can be brought into a locked state, and the first rod tube (12) and the second rod tube (14) are not displaced relatively. Referring to Fig. 2, when the user presses the pressure bar (16), the pressure bar (16) will apply force to the first movable piece (36) to cause displacement thereof, and the first activity is on the 5 piece (36). The first recess (42) will correspond to the first positioning steel ball ((4); thus the first clamping steel ball (44) can fall into the first recess (4)), so that the first clamping device (3G) and the second rod The tube ((4) does not have a carding effect. Therefore, the combination of the pressing rod (16) and the first rod tube (10) and the first clamping device (10) can form a contracting motion along the axial displacement of the second rod tube (14). Referring to Figure 3, the first positioning ball of the seat post (16), the first rod tube (10) and the first clamping device (3G) in the second rod tube ((4) and the first clamping device (10)) (44) When the second rod tube (the second position hole (10) of the (4)) is corresponding to the second rod tube (10), the user can release the force pressed against the pressure rod (16). 4 Referring to Fig. 4, the user can press the force on the pressing rod (16) and the 'tongue piece (36) will be displaced upward by the spring (38), and the first positioning steel ball (10) will be subjected to The peripheral position (42a) of the first hole (10) is pushed up to protrude into the second positioning hole (i4b) of the second rod tube (14), thereby causing the first rod tube (10) to contract to the second rod tube ((4) The positioning state is formed inside. The operation and action of the first cup tube (12) from the second rod tube ((4) are the reverse operation and the reverse operation described above. 4 See the fifth item, regarding the first clamping device (10)) The first movable piece (36) and the first seat (32) are combined to extend at least one hook portion (36a) at the bottom of the first movable piece ((10)), and the hook portion (36a) Passing through the rim (32a) of the first body (32); thus the first movable piece (36) is pushed up by the spring (38) due to the hook portion (36a) and the rim (32a) The first movable piece (36) does not disengage from the first seat body (32). Please refer to Fig. 6, which shows that one end of the second rod tube (14) is coupled with a M422896 second card assembly. (50), and the combination of the second rod tube (14) and the second clamping device (50) is placed in a third rod tube (18). The structure shown in Fig. 6 only shows the entire rod structure. In some parts, the combined configuration of the first rod tube (12), the first clamping device (30) and the second rod tube (14) is not shown, but the first rod tube (12), the first card system The combined configuration of the device (30) and the second rod tube (14) is the same as the foregoing, and will not be repeated here. The second clamping device (50) consists of a second seat (52) and a second movable piece. Φ (54), a second positioning steel ball (56), a third positioning steel ball (58) and a spring (62). Specifically, the second base body (52) has a second through hole (52a) And a third bead hole (52b) for accommodating the second positioning steel ball (56) and the third positioning steel V-bead (58). The second bead hole (52a) and the third bead hole (52b) are located in the second seat The body (52) is opposite to the two sides, so the second positioning steel ball (56) is not on the same side as the third positioning steel ball (58). The second movable piece (54) is matched with the spring (62) to form an elastically movable assembly* In the second seat (52). Further The second movable piece (54) has a second recess (54a) and a third recess (54b), and the second recess (54a) and the third recess (54b) correspond to the second positioning steel ball ( 56) and the third positioning steel ball (58). Secondly, the combined configuration of the second movable piece (54) and the second seat (52) can be combined with -> the first movable piece (36) and the first seat (32) The assembly is the same. When the second clamping device (50) is not operated or operated, the second positioning ball (56) is subjected to the pushing position of the peripheral position (54c) of the second pocket (54a). Protruding, and the second positioning ball (56) is engaged with the third 7 M422896 positioning hole (18a) on the third rod tube (18). In other words, the second rod tube (14) and the third rod tube (18) are in a stuck state by the first clamping device (50). As for the third positioning steel ball (58), it corresponds to the third recess (54b), and the third rod tube (18) does not form a carded state. Referring to Figure 7, it is known in the above description that the plunger (16) ^ for the first clamping device (3) allows the first tube (10) to be retracted within the second tube (14). And when the first clamping device (3〇) moves to the bottom of the second rod tube (14). When the first clamping device (3〇) touches the second clamping device (5) of the second clamping device (5), for example, the second movable piece is touched by the bottom surface of the first clamping device (30). (54), or a touch lever (not shown) is formed on the bottom surface of the first clamping device (3〇) to touch the second movable piece (54). The second movable piece (54) is displaced by the pressing action of the first clamping device (3〇), thereby causing the second positioning steel ball (56) to leave the third positioning hole on the third rod tube (μ) (18a) falls into the second pocket (54a). Thus, the second carding device (50) and the third rod tube (18) do not have a carded state. In the state shown in Figure 7, the pressure bar (丨6), the first rod tube (12), the first clamping device (3〇), the second rod tube (14) and the second card The device (50) can be retracted into the interior space of the third rod tube (18). And adjacent to the fourth positioning hole (18b) of the third rod tube (18). In particular, the third positioning boring (18a) and the fourth positioning hole (18b) are located on opposite sides. - Refer to Figure 8, the pressure bar (16), the first rod tube (12), the first clamping device (30), the first stem tube ((4) and the second clamping device (5〇) towards the third rod tube 〇8) When the bottom moves, and the third positioning steel ball (58) corresponds to the fourth positioning hole (18b), the user applies the repeated force, and the first clamping device (30) drives the second movable piece 8 M422896. (54) generating a displacement, the third positioning steel ball (58) is protruded by the pushing of the peripheral position (54d) of the third pocket (54b), and is embedded in the fourth positioning hole (18b); When the user releases the force on the pressing rod (16), the first positioning steel ball (44) is pushed up by the peripheral position (42a) of the first recess (42) and protrudes into the second rod tube ( 14) a second positioning hole (14b). Thus, the first rod tube (12) is positioned, and the second movable piece (54) of the second clamping device (50) has a tendency to rise upward, but the bottom portion of the first rod tube φ (12) The one movable device (30) cannot be displaced, so the second movable piece (54) cannot be displaced. In other words, the third positioning ball (58) and the fourth positioning hole (18b) form a card for the second rod (14) to contract and be positioned within the third tube (18). As for the extension operation and action of the first rod tube (12) and the second rod tube (14), it is the reverse operation and the reverse action of the aforementioned contraction state. According to the above, the structure of the first clamping device (30) and the second clamping device (50) I is simplified, so that the assembly and operation are very convenient; secondly, the creation of the first positioning steel ball (44), the first The position of the second positioning steel ball (56) and the third positioning steel ball (58) is matched with the second rod tube (14) and the third rod tube (18) to form a simple positioning hole, so that the rod tubes can be expanded and positioned. Therefore, it is easy to operate and smooth. The preferred embodiment and the design of the present invention are merely illustrative and are not intended to limit the scope of the present invention. Or the implementation of the scope of rights covered by the contents of the "Scope of Application for Patent Application" below does not deviate from the scope of the applicant's rights. [Simple description of the drawing] Fig. 1 is a schematic diagram showing the combined structure of the first rod tube and the second rod tube. Figure 2 is a schematic diagram of the action of the first rod tube contracted in the second rod tube of the present invention - 〇 Figure 3 is a schematic diagram of the action of the first rod tube contracted in the second rod tube. The action of the rod tube contracting in the second rod tube is shown in Fig. 3. Figure 5 is a schematic view showing the structure of the first carding device of the present invention. Figure 6 is a schematic diagram showing the combined structure of the second rod tube and the third rod tube. Figure 7 is a schematic diagram of the ?v action of the first rod tube and the second rod tube contracted in the third rod tube. / Fig. 8 is a schematic diagram 2 of the action of the first rod tube and the second rod tube contracted in the third rod tube. I [Description of main component symbols] (10) Pull rod (14) Second rod tube (14b) Second positioning hole (18) Third rod tube - V (18b) Fourth positioning hole (30) First clamping device ( 32a) retaining edge (36) first movable piece (12) first rod tube (14a) first positioning hole (16) pressing rod (18a) third positioning hole (20) base (32) first seat body (34) ) first bead hole (36a) hooking portion M422896 (38) spring (42a) peripheral position (50) second clamping device (52a) second bead hole (54) second movable piece (54b) third recess (54d) Peripheral position (58) Third positioning steel ball (42) First pocket (44) First positioning steel ball (52) Second seat body (52b) Third ball hole (54a) Second concave six (54c) Peripheral position (56) second positioning steel ball (62) spring 11