561086 玫、發明說明： 發明背景 發明領域 本發明大體是有關於一種具有互相樞軸連接之二驅動 柄之扳手。特別是，本發明是有關於一種具有互相樞軸連 接之二驅動柄之六角鍵型扳手或艾倫(Allen)扳手。此六角 鍵型扳手的特徵是指由剖面看來該扳手的驅動柄呈六角 形。 相關技藝之說明 習知的扳手，例如艾倫扳手或是六角鍵型扳手，用來 抓握以及轉動或扭轉螺栓的頭，帽螺釘，螺帽，導管，或 是類似的通常包括整體的L形金屬，其一端用來當作驅動 柄以及另一端用來當作握柄。 在美國專利第5,943,925號中，Huang揭露一種具有 可摺疊結構的工具。Huang所揭露的可摺疊結構包括一聯 結器，樞軸地聯結在驅動柄與握柄之間。將此可摺疊結構 應用至艾倫扳手，驅動柄可摺疊成與握柄平行，亦即，相 對於握柄之間的角度爲零。在Huang中，相對於該握柄， 驅動柄可以由零度的角度轉到180度的角度。在侷限的空 間中轉動螺栓時，例如，在垂直接合平面的邊界附近，採 用Huang所揭露的可摺疊結構的艾倫扳手，其握柄只可在 延著垂直於驅動柄的表面的零度與180度之間轉動。當完 成轉動動作的半圓時，使用者必須將扳手由螺栓鬆開。藉 著將握柄重新定位在轉動動作的圓點，重複此轉動動作， 直到將螺栓閂緊到所需的程度。 97 17pifl .doc/008 5 561086 換言之，在螺緊/鬆開螺絲時，在有限自由度的平面 中的螺栓或螺帽，使用者可能必須重複地嚙合及鬆開驅動 柄，藉以將握柄重新定位。更進一步，使用此種習知結構， 此扳手只有一端可以用來當作驅動工具，而另一端只能用 來當作握柄。當需要不同的力矩時，或是從而驅動不同深 度的螺絲，螺栓或螺帽，必須要連接或重新組不同的驅動 柄0 發明總結 本發明提出一種具有二驅動柄互相樞軸連接之扳手。 籲 此扳手包括艾倫扳手或六角鍵型扳手，所謂的六角鍵型扳 手是指具有六角鍵或是六角形驅動柄的扳手。該些驅動柄 之一具有一母分叉接頭，自該主柄突出，於其中央具有一 開孔。另一驅動柄具有一公連接接頭，自該主柄之軸向中 央突出。該公接頭及該母接頭經由一連接器互相嚙合，諸 如滾動栓。因此，無需使用額外的鉸鏈或其他機械性聯結 器，這兩個驅動柄即可互相樞軸連接。這兩個樞軸連接的 驅動柄中的一個可以相對於另一個由約90度的角度翻轉 至約270度的角度。 籲 如此配置，該些驅動柄之一用來當作握柄，可以由約 90度至約270度的角度翻轉，相對於該些驅動柄之另一 個，用以轉動螺絲，螺栓或螺帽。因此，當握柄的轉動受 到阻礙時，握柄可以舉向上或向下，藉以進行栓緊或移除。 握柄的特定的翻轉角度實際上是依據該些驅動柄之間的距 離而定。亦即，握柄亦可由小於90度的角度翻轉至大於270 度的角度。 9717pifl.d〇c/008 6 本發明所提出的扳手結構亦可應用於轉動凹頭螺絲， 螺栓或螺帽，在自由角度有限的空間中，例如，在握柄的 轉動被其他物體阻礙的情形時。例如，當要轉動附近有第 二平面突出的平面上的螺絲時，該螺絲與驅動柄嚙合，以 及轉動握柄來轉動螺絲，藉以旋入/旋出該螺絲。由於被 突出物阻礙，握柄的轉動範圍被限制在沿著該第一平面的 表面的特定角度。當握柄由一端轉動至另一端時，亦即， 沿著該表面由零度的角度至該特定角度，使用者無需將驅 動柄由螺帽鬆開。相對的，使用者可以簡單地將握柄翻至 另一端，以及繼續轉動螺絲。 此外，由於樞軸連接在一起的二驅動柄的結構，使用 者可以選擇該些驅動柄中的的任一個當作握柄，以及另一 個驅動柄嚙合與轉動目標物，例如，螺絲，螺栓，螺帽， 或類似的。當要嚙合與轉動的目標物有不同的深度時，或 是需要不同的力矩時，使用者可以互換這兩個驅動柄的功 能。更進一步，在某些環境下，使用者可以選擇使兩個驅 動柄彼此成一直線（在零度角度），以及藉著用套筒皮手施 加至與驅動柄相對的柄的自由端來轉動目標物。 前面的一般性敘述以及後面的詳細敘述只是做爲示範 性及解釋性的，並非做爲本發明的限制，如所宣告的。 圖式之簡單說明 第1(a)圖至第1(g)圖是依照本發明的扳手的側視圖及 前視圖，其中一個驅動柄的位置垂直於另一個驅動柄； 第2(a)圖至第2(d)圖繪示依照本發明的其中一個具有 母接頭的驅動柄的不同視圖； 97 1 7pif 1 .doc/008 7 561086 第3(a)圖至第3(d)圖繪示依照本發明的其中一個具有 公接頭的驅動柄的不同視圖； 第4圖繪示依照本發明的組合兩個驅動柄的方法； 第5(a)圖至第5(d)圖是依照本發明的另外的實施例中 的具有公接頭的驅動柄的不同視圖（亦即，具有較大強度 的公接頭的替代設計）；以及 第6(a)圖至第6(d)圖是依照本發明的另外的實施例中 的具有母接頭的驅動柄的不同視圖（亦即，具有較大強度 的母接頭的替代設計）。 圖式中標示之簡單說明 10驅動柄 12驅動柄 14滾動栓 16薄片 22公接頭 26柄末端角 41箭頭 42箭頭 50邊緣 52驅動柄 54公接頭部分 54a基座部分 54b平面薄板 54c薄片 62驅動柄 97 17pifl .doc/008 8 561086 64母接頭 64a基座部分 64b叉狀結構 較佳實施例之詳細說ϋ 第1(a)圖至第6(e)圖繪示以具有互相樞軸連接之二驅 動柄之六角鍵型扳手或艾倫扳手實現的本發明。由於樞軸 地連接，該些驅動柄之一用來當作把柄’藉以驅動另一驅 動柄，藉以使諸如凹頭螺帽（socket head nut)，螺絲或螺栓 的物體可以被鎖入或鬆出。當其中一個用來旋入/旋出 _ (threading/unthreading)物體時，握柄可以由約90度的角 度翻轉到約270度，相對於用來當作旋入/旋出物體的驅 動柄。以此方式，即使存在阻礙旋入/旋出作業的物體， 使用者無需鬆開該物體以及旋轉該握柄藉以繼續旋入/旋 出。代替的，使用者可以輕易地翻轉握柄以及重複轉動握 柄，藉以完成旋入/旋出作業。除了六角鍵型扳手或艾倫 扳手的應用之外，可以瞭解，習知此技藝者可以修飾本實 施例的揭露，以及將之應用於其他型式的驅動工具，諸如 套筒扳手，開口扳手，管鉗（socket wrench)，或是類似的。 @ 第1(a)圖繪示包括互相樞軸連接之二驅動柄之扳手之 側視圖。此板手是乂倫板手或是具/、角鍵或六角形驅動柄 的扳手。在此實施例中，滾動栓14穿透過每一驅動柄。 可以瞭解，滾動栓14亦可用其他類似的聯結器來代替， 諸如一組螺栓及螺帽。可以由第1(a)圖及第1(b)圖所繪示 的部分分解前視圖淸楚地看到滾動栓14的使用。第i(a) 圖至第1(c)圖都是繪示具有在彼此垂直的位置的驅動柄 97 1 7pif 1 .doc/008 9 561086 10、12的扳手。 一 對於另外的組態，第1(d)圖及第以幻圖繪示的扳手， 在驅動柄10的一個末端具有切割凹槽以及圓胖的柄末端 角26的端點。該圓胖末端是設計來使扳手很容易地嚙合 於要鎖緊的元件，諸如螺絲，螺栓，或螺帽。對於另外的 組態，第1(f)圖繪示在驅動柄12的一個末端的切割凹槽 以及圓胖的柄末端角26。第1(g)圖繪示在驅動柄10的一 個末端以及在驅動柄12的一個末端的切割凹槽以及圓胖 的柄末端角26。 第2(a)圖及第2(b)圖繪示扳手的驅動柄1〇的側視圖 及前視圖兩者。如第2(a)圖所繪示，在驅動柄1〇的一個 末端包括一母接頭。在驅動柄10的該末端，由該驅動柄 延伸一矩形部分，在矩形部分的兩個相對邊緣突出具有相 同尺寸的兩個薄片16，以及於其間保留一空間。第2(c)圖 繪示驅動柄10的沿著直線II-II的橫切面視圖。如第2(c) 圖所繪示，驅動柄10的橫切面爲每邊的寬度爲d的六邊 形。每一邊的外角約爲60度。 如第2(d)圖所繪示，薄片16的寬度等於Λ&?，以及每 一薄板的厚度等於每一邊的長度的一半，亦即，。可 以瞭解’其厚度及寬度並不只是限制於此種大小，縱使改 變了薄片的厚度’此扳手亦可正確地運作。請參照第2(b) 圖，於個別的薄片16的中央具有一開孔。兩個薄片16的 開孔彼此對齊’使得如弟1 (a)圖所繪示的滾動栓14可以 穿透過兩個開孔。 第3(a)圖至第3(c)圖繪示具有公接頭22的驅動柄12。 公接頭22包括矩形橫切面的凸出，其由一個末端的中央 97 1 7pif 1 .doc/008 561086 部分突出，從驅動柄12的一側到相對側。公接頭22的厚 度吻合於驅動柄10的母接頭的兩個薄片16之間的空間。 最好，該厚度近似於驅動柄10的一邊的長度凸出22 的寬度約爲。 第3⑷圖繪示驅動柄12的沿著直線ΙΙΙ-ΙΠ的橫切面 視圖。可以很淸楚地看到，驅動柄12具有六邊形的橫切 面，每邊的寬度爲^。驅動柄12的頂部的公接頭的上視圖 如第3(d)圖所繪示。公接頭的中央亦具有一開孔，藉以允 許滾動栓14穿過，如第3(b)圖所繪示。請參照第3(b)圖’ 公接頭爲似圓頂形的結構，其寬度近似於驅動柄1〇的薄 片16之間的空間的寬度。於是，兩個驅動柄10及12彼 此樞軸地耦接。於是，使用者可以翻轉驅動柄1〇及12中 之一，由90度的角度至270度的角度，相對於另一個驅 動柄。 第4圖繪示驅動柄1〇及12的組合。可以依照特定需 求改變驅動柄1〇及12兩者的長度。最好，具有母接頭的 驅動柄10比具有公接頭的驅動柄長。當如第4圖所繪示 的組合時，例如’驅動柄12正在接近驅動柄10 ’使公接 頭朝向母接頭，沿著箭頭42的方向。要與驅動柄10嚙合， 滾動栓14穿進公接頭及母接頭的開孔，藉以閂住驅動柄10 及12至一程度，其中的一個可以翻轉至另一個之上。滾 動栓在插入時的幅射方向壓擠’可以對轉動動作提供一些 轉動阻力。滾動栓14穿過驅動柄10及12兩者的方向如 箭頭41所示。 第5(a)圖至第6(e)圖繪示依照本發明的另一實施例。 在第5(a)圖至第5(e)圖中’繪不具有另一型式的公接頭的 9717pifl.doc/008 驅動柄，而在第6(a)圖至第6(e)圖中，繪示具有另一型式 的母接頭的驅動柄。在此實施例中，最好，具有公接頭的 驅動柄比具有母接頭的驅動柄短。 第5(a)圖及第5(b)圖爲具有公接頭的驅動柄的側視圖 及前視圖。在第5(a)圖中，驅動柄52的一個末端包括公 接頭部分54。該公接頭部分更包括基座部分54a，由驅動 柄52的主柄延伸，具有弧形的底部及平坦的頂部。在基 座部分54a的平坦的頂部的頂端，具有平面薄板54b，以 及在平面薄板54b的中央部分突出薄片54c。此種公接頭 部分的側視圖繪示於第5(b)圖中。 沿著直線V-V橫切的橫切面視圖如第5(c)圖所繪示。 驅動柄52的主柄的橫切面爲六邊形形狀，每邊的寬度爲d 以及約爲60度的外角。 公接頭部分54的上視圖如第5(d)圖所繪示。由此上 視圖，公接頭部分54類似一圓形，其覆蓋主柄的整個橫 切面。薄片54c的厚度近似於^，以及薄片54c的寬度， 亦即，公接頭基座部分54b的直徑實質上大於。 此外，如第5(b)圖所繪示，薄片54c的邊緣50已被 圓形化。第6(a)圖及第6(b)圖爲具有母接頭64的驅動柄62 的側視圖及前視圖。在第6(a)圖中，驅動柄62的其中一 端包括母接頭部分64。該母接頭部分更包括基座部分64a， 由驅動柄62的主柄延伸，具有弧形的底部及平坦的頂部。 由圓柱形的基座部分64突出，具有叉狀結構64b，其允許 第5(a)圖中的驅動柄52的薄片54c嚙合於其中。叉狀結 構64b，如第6(a)圖所繪示，圓柱形的基座部分64包括有 溝槽的延伸，具有如第6(b)圖所繪示的圓形化末端，因而 9717pifl.d〇c/008 561086 形成兩個分叉，具有平坦的機械加工的內部表面以及圓柱 的弧形外部表面，如第6(a)圖及第6(d)圖所繪示。 此種母接頭部分64的側視圖繪示於第6(b)圖中。沿 著直線νι-νι橫切的橫切面視圖如第6(c)圖所繪示。驅動 柄62的主柄的橫切面爲六邊形形狀，每邊的寬度爲^以 及約爲60度的外角。母接頭部分64的上視圖如第6(d)圖 所繪示。由此上視圖，允許薄片54c嚙合於其中的間隔具 有近似於d的厚度，母接頭部分64的基座部分直徑遠大 於，具有根據強度計算的精密尺寸。 由此處揭露之本發明的說明及實踐的考量，習知此技 · 藝者可以得到本發明的其他實施例。因此，此說明及實踐 應該只作爲範例之用，本發明的真正的範圍及精神以後附 之申請專利項爲準。 97 1 7pif 1 .doc/008561086 Description of the invention: BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to a wrench having two driving handles which are pivotally connected to each other. In particular, the present invention relates to a hexagon key type wrench or an Allen wrench having two driving handles pivotally connected to each other. The characteristic of this hex key wrench is that the driving handle of the wrench is hexagonal in cross section. Description of Related Skills Conventional wrenches, such as Allen wrenches or hex key wrenches, are used to grip and turn or twist the head of a bolt, cap screw, nut, conduit, or similar generally including an integral L-shape One end of metal is used as a drive handle and the other end is used as a handle. In U.S. Patent No. 5,943,925, Huang discloses a tool having a foldable structure. The foldable structure disclosed by Huang includes a coupler that is pivotally connected between the drive handle and the grip. Applying this foldable structure to an Allen wrench, the drive handle can be folded parallel to the handle, that is, the angle relative to the handle is zero. In Huang, with respect to the grip, the driving handle can be turned from an angle of zero degrees to an angle of 180 degrees. When turning the bolt in a confined space, for example, near the boundary of the vertical joint plane, the Allen wrench using the foldable structure disclosed by Huang can only be held at zero degrees and 180 degrees along the surface perpendicular to the drive handle. Between degrees. When the semi-circle of the turning action is completed, the user must loosen the wrench by the bolt. By relocating the grip to the dot of the turning action, repeat this turning action until the bolt is tightened to the desired level. 97 17pifl .doc / 008 5 561086 In other words, when tightening / loosening a screw, a bolt or nut in a plane with limited degrees of freedom may require the user to repeatedly engage and loosen the drive handle to regain the grip Positioning. Furthermore, with this conventional structure, only one end of this wrench can be used as a driving tool, and the other end can only be used as a grip. When different torques are required, or to drive screws, bolts or nuts of different depths, different driving handles must be connected or reassembled. SUMMARY OF THE INVENTION The present invention proposes a wrench with two driving handles pivotally connected to each other. This type of wrench includes an Allen wrench or a hex key wrench. The so-called hex key wrench refers to a wrench with a hex key or a hexagonal drive handle. One of the driving handles has a female bifurcated joint that protrudes from the main handle and has an opening in the center thereof. The other driving handle has a male connection joint protruding from the axial center of the main handle. The male connector and the female connector are engaged with each other via a connector, such as a rolling pin. As a result, the two drive levers can be pivotally connected to each other without the need for additional hinges or other mechanical couplings. One of the two pivotally connected drive handles can be flipped from an angle of about 90 degrees to an angle of about 270 degrees relative to the other. With such a configuration, one of the driving handles is used as a grip, and can be turned from an angle of about 90 degrees to about 270 degrees, and the other one of the driving handles is used to rotate a screw, bolt or nut. Therefore, when the rotation of the grip is obstructed, the grip can be lifted up or down for bolting or removal. The specific turning angle of the handle is actually determined by the distance between the driving handles. That is, the grip can also be turned from an angle of less than 90 degrees to an angle of more than 270 degrees. 9717pifl.d〇c / 008 6 The wrench structure proposed by the present invention can also be applied to turning the socket head screw, bolt or nut, in a space with limited free angle, for example, when the rotation of the handle is blocked by other objects . For example, when a screw on a plane protruded by a second plane nearby is to be rotated, the screw is engaged with the driving handle, and the handle is rotated to rotate the screw to screw in / out the screw. Due to being hindered by the protrusion, the rotation range of the grip is limited to a specific angle along the surface of the first plane. When the grip is turned from one end to the other, that is, from a zero-degree angle to the specific angle along the surface, the user does not need to loosen the drive handle by the nut. In contrast, the user can simply turn the grip to the other end and continue turning the screw. In addition, due to the structure of the two driving handles that are pivotally connected together, the user can choose any one of the driving handles as a grip, and the other driving handle engages and rotates the target, such as screws, bolts, Nut, or similar. When the target to be engaged and rotated have different depths, or when different torques are required, the user can interchange the functions of the two driving handles. Furthermore, in certain circumstances, the user may choose to align the two drive handles with each other (at an angle of zero degrees), and to rotate the target by applying to the free end of the handle opposite to the drive handle with a sleeve leather hand . The foregoing general description and the following detailed description are intended to be exemplary and explanatory only, and are not to be construed as limitations of the present invention, as announced. Brief description of the drawings Figures 1 (a) to 1 (g) are side and front views of a wrench according to the present invention, where the position of one driving handle is perpendicular to the other driving handle; Figures 2 to (d) show different views of one of the drive handles with female connectors according to the present invention; 97 1 7pif 1 .doc / 008 7 561086 Figures 3 (a) to 3 (d) Different views of one of the driving handles with a male connector according to the present invention; FIG. 4 shows a method of combining two driving handles according to the present invention; FIGS. 5 (a) to 5 (d) are according to the present invention Different views of a drive shank with a male connector in another embodiment (ie, an alternative design of a male connector with greater strength); and Figures 6 (a) through 6 (d) are in accordance with the present invention Different views of a drive handle with a female connector in a further embodiment (ie, an alternative design of a female connector with greater strength). Brief description marked in the drawing 10 drive handle 12 drive handle 14 rolling bolt 16 sheet 22 male connector 26 handle end angle 41 arrow 42 arrow 50 edge 52 drive handle 54 male connector part 54a base part 54b flat sheet 54c sheet 62 drive handle 97 17pifl .doc / 008 8 561086 64 Female connector 64a Base portion 64b Fork-shaped structure of the preferred embodiment ϋ Figures 1 (a) to 6 (e) are shown to have two pivotal connections The invention is realized by a hexagonal key wrench or an Allen wrench of a driving handle. Due to the pivotal connection, one of these drive handles is used as a handle to drive the other drive handle, so that objects such as socket head nuts, screws or bolts can be locked in or released out . When one of them is used to screw in / unthread _ (threading / unthreading) objects, the grip can be flipped from an angle of about 90 degrees to about 270 degrees, relative to the driving handle used as a screw in / unthreading object. In this way, even if there is an object hindering the screw-in / spin-out operation, the user does not need to release the object and rotate the handle to continue screwing in / out. Instead, the user can easily flip the handle and repeatedly rotate the handle to complete the screw-in / spin-out operation. In addition to the application of hexagon key wrenches or Allen wrenches, it can be understood that those skilled in the art can modify the disclosure of this embodiment and apply it to other types of driving tools, such as socket wrenches, open end wrenches, pipes Socket wrench, or similar. @ 第 1 (a) illustrates a side view of a wrench including two drive handles pivotally connected to each other. This wrench is a lunatic wrench or a wrench with /, angle keys, or hexagonal drive handles. In this embodiment, the rolling pin 14 penetrates through each driving handle. It can be understood that the rolling pin 14 can also be replaced by other similar couplings, such as a group of bolts and nuts. The use of the rolling pin 14 can be clearly seen from the partially exploded front views shown in Figs. 1 (a) and 1 (b). Figures i (a) to 1 (c) show wrenches with driving handles 97 1 7pif 1 .doc / 008 9 561086 10, 12 at positions perpendicular to each other. -For other configurations, the wrenches shown in Figure 1 (d) and Figure 3 have magic grooves at one end of the drive handle 10 and the ends of the chubby handle end angle 26. The fat end is designed to allow the wrench to easily engage the element to be locked, such as a screw, bolt, or nut. For another configuration, Figure 1 (f) shows the cut groove at one end of the drive shank 12 and the rounded shank end angle 26. Figure 1 (g) shows the cutout grooves at the one end of the drive handle 10 and the one end of the drive handle 12 and the rounded shank end angle 26. Figures 2 (a) and 2 (b) show both a side view and a front view of the driving handle 10 of the wrench. As shown in FIG. 2 (a), a female connector is included at one end of the driving handle 10. At the end of the driving handle 10, a rectangular portion is extended by the driving handle, two sheets 16 of the same size protrude at two opposite edges of the rectangular portion, and a space is reserved therebetween. Fig. 2 (c) shows a cross-sectional view of the driving handle 10 along the line II-II. As shown in FIG. 2 (c), the cross section of the driving handle 10 is a hexagon with a width d on each side. The external angle on each side is approximately 60 degrees. As shown in Fig. 2 (d), the width of the sheet 16 is equal to Λ &?, And the thickness of each sheet is equal to half the length of each side, that is ,. It can be understood that 'the thickness and width are not limited to this size, and even if the thickness of the sheet is changed', this wrench can operate correctly. Referring to FIG. 2 (b), an opening is provided in the center of the individual sheet 16. The openings of the two sheets 16 are aligned with each other 'so that the rolling pin 14 as shown in Figure 1 (a) can pass through the two openings. 3 (a) to 3 (c) show the driving handle 12 having the male joint 22. The male joint 22 includes a protrusion of a rectangular cross section, which is partially protruded from the center 97 1 7pif 1 .doc / 008 561086 of one end, from one side of the drive handle 12 to the opposite side. The thickness of the male connector 22 matches the space between the two sheets 16 of the female connector of the drive handle 10. Preferably, the thickness is approximately the length of one side of the drive handle 10 and the width of the protrusion 22 is approximately. Figure 3 (a) illustrates a cross-sectional view of the drive shaft 12 along the line III-III. It can be seen very clearly that the driving handle 12 has a hexagonal cross section, and the width of each side is ^. The top view of the male connector on the top of the drive handle 12 is shown in Figure 3 (d). The male joint also has an opening in the center to allow the rolling pin 14 to pass through, as shown in Figure 3 (b). Please refer to FIG. 3 (b). The male joint has a dome-like structure, and its width is approximately the width of the space between the thin pieces 16 of the driving handle 10. Then, the two driving levers 10 and 12 are pivotally coupled to each other. Thus, the user can turn one of the driving handles 10 and 12 from an angle of 90 degrees to an angle of 270 degrees with respect to the other driving handle. Figure 4 shows the combination of drive handles 10 and 12. The lengths of both the drive handles 10 and 12 can be changed according to specific requirements. Preferably, the drive handle 10 having a female connector is longer than the drive handle 10 having a male connector. When the combination is shown in FIG. 4, for example, the 'driving handle 12 is approaching the driving handle 10' with the male connector facing the female connector in the direction of arrow 42. To engage with the driving handle 10, the rolling pin 14 penetrates into the openings of the male and female joints, thereby latching the driving handle 10 and 12 to a degree, one of which can be turned over the other. Squeezing of the rolling pin in the direction of radiation when inserted can provide some turning resistance to the turning action. The direction in which the rolling pin 14 passes through both the driving handles 10 and 12 is shown by an arrow 41. 5 (a) to 6 (e) illustrate another embodiment according to the present invention. In Figures 5 (a) to 5 (e), '9717pifl.doc / 008', which does not have another type of male connector, is drawn, and in Figures 6 (a) to 6 (e) , Shows a drive handle with another type of female connector. In this embodiment, it is preferable that the driving handle having the male connector is shorter than the driving handle having the female connector. Figures 5 (a) and 5 (b) are a side view and a front view of a drive lever with a male connector. In Fig. 5 (a), one end of the driving lever 52 includes a male joint portion 54. The male joint portion further includes a base portion 54a, which extends from the main handle of the driving handle 52, and has a curved bottom and a flat top. At the top end of the flat top portion of the base portion 54a, there is a flat sheet 54b, and a sheet 54c is projected at the central portion of the flat sheet 54b. A side view of such a male connector portion is shown in Figure 5 (b). A cross-sectional view taken along the line V-V is shown in Figure 5 (c). The cross section of the main shaft of the driving shaft 52 is a hexagonal shape, and the width of each side is d and the outer angle is about 60 degrees. A top view of the male joint portion 54 is shown in FIG. 5 (d). From this top view, the male joint portion 54 resembles a circle, which covers the entire cross section of the main shank. The thickness of the sheet 54c is approximately ^, and the width of the sheet 54c, that is, the diameter of the male joint base portion 54b is substantially larger. In addition, as shown in Fig. 5 (b), the edge 50 of the sheet 54c has been rounded. 6 (a) and 6 (b) are a side view and a front view of a drive lever 62 having a female connector 64, respectively. In Fig. 6 (a), one end of the driving lever 62 includes a female connector portion 64. The female joint portion further includes a base portion 64a, which extends from the main handle of the driving handle 62, and has a curved bottom and a flat top. Protruding from a cylindrical base portion 64, there is a fork-like structure 64b which allows the sheet 54c of the driving lever 52 in Fig. 5 (a) to be engaged therein. The fork-shaped structure 64b, as shown in FIG. 6 (a), the cylindrical base portion 64 includes a grooved extension having a rounded end as shown in FIG. 6 (b), and thus 9717pifl. doc / 008 561086 forms two bifurcations with a flat machined inner surface and a cylindrical arced outer surface, as shown in Figures 6 (a) and 6 (d). A side view of such a female joint portion 64 is shown in Fig. 6 (b). A cross-sectional view taken along a straight line νι-νι is shown in Figure 6 (c). The cross section of the main shank of the driving shank 62 is a hexagonal shape, and the width of each side is ^ and an outer angle of about 60 degrees. A top view of the female connector portion 64 is shown in Fig. 6 (d). From the above view, the spacer allowing the sheet 54c to engage therein has a thickness close to d, and the base portion of the female joint portion 64 has a diameter larger than that of the base portion, and has a precise size calculated based on the strength. The description and practical considerations of the present invention disclosed herein, those skilled in the art can obtain other embodiments of the present invention. Therefore, this description and practice should only be used as examples. The true scope and spirit of the present invention shall be subject to the appended claims. 97 1 7pif 1 .doc / 008