TWI710431B - Hand tool structure - Google Patents

Hand tool structure Download PDF

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Publication number
TWI710431B
TWI710431B TW108124427A TW108124427A TWI710431B TW I710431 B TWI710431 B TW I710431B TW 108124427 A TW108124427 A TW 108124427A TW 108124427 A TW108124427 A TW 108124427A TW I710431 B TWI710431 B TW I710431B
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Taiwan
Prior art keywords
shaft
main handle
sub
handle
handles
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TW108124427A
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Chinese (zh)
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TW202102340A (en
Inventor
曾瓘鈞
劉正威
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寶暉有限公司
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Priority to TW108124427A priority Critical patent/TWI710431B/en
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Publication of TW202102340A publication Critical patent/TW202102340A/en

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Abstract

A hand tool comprising a shaft, a main-handle, a lens, two sub-handles, a plurality of clutching members, two assembling members and a tool member, wherein, it has multiple input members to transform rotation into a unidirectional output, and the shaft has a helical pattern on its cylindrical surface, the lens has an uneven surface in which the helical pattern on the shaft turned into an arrow-like symbol through the lens. Whereby, when one of the sub-handles is rotating in the first direction, the shaft does not rotate related to the main handle and the arrow symbol stay still; when one of the sub-handles is rotating in the second direction, the shaft rotates in the second direction related to the main handle in which the arrow symbol moving forward and indicates the direction of manipulation. There are two holes on the opposite end of the hand tool for the insertion of tool member to get both directions of outputs.

Description

手工具結構 Hand tool structure

本發明係關於一種手工具,尤指一種螺絲起子,具有帶單向軸承的多個輸入構件以及光學指示器。 The present invention relates to a hand tool, especially a screwdriver, which has a plurality of input members with one-way bearings and an optical indicator.

已知技術之帶有單向結構如棘輪或單向軸承的手工具具有相同的問題:在鎖上的目標物和緊固件之間尚未有足夠的磨擦力時,緊固件會因打滑而無法讓手工具上的單向結構發揮效用。且大多緊固件之螺紋皆為右手螺紋,意指緊固件順時針轉而前進鎖緊,逆時針轉而後退放鬆。對工程師而言是顯而易懂的,但對於一般缺乏空間概念的使用者而言,必需每次嘗試以找到所需方向,造成操作上的麻煩。 Known art hand tools with unidirectional structures such as ratchets or unidirectional bearings have the same problem: when there is not enough friction between the locked target and the fastener, the fastener will slip and fail to allow The one-way structure on the hand tool works. And most of the fasteners' threads are right-handed threads, which means that the fasteners turn clockwise to move forward and lock, and counterclockwise to move backwards to relax. It is obvious and easy to understand for engineers, but for users who generally lack the concept of space, they must try to find the desired direction every time, causing operational troubles.

美國專利號US3742787在1971年7月26日揭示了一個帶有球狀握把及棘輪機構的手工具,其中在兩端有插孔供工具頭***以達到鎖緊及放鬆功能。然而此發明兼具上述兩項問題,即便製造商在兩端以文字標示功能,這樣的方法不夠直覺,並且破壞美觀。 US Patent No. US3742787 on July 26, 1971 disclosed a hand tool with a spherical grip and a ratchet mechanism, in which there are sockets at both ends for the tool head to insert to achieve the locking and loosening functions. However, this invention has both of the above-mentioned problems. Even if the manufacturer uses text to mark the function at both ends, this method is not intuitive and ruins the aesthetics.

本發明提供了一種手工具,透過多個含有單向軸承的輸入構件解決了緊固件的打滑問題,並且用光學指示器解決了識別方向的問 題,該光學指示器用移動箭頭示出方向。當用戶的手握住手工具並且箭頭指向外側時,整個組件僅傳遞順時針旋轉,從而拴緊緊固件,當用戶用左手握住主手柄,窗口朝上,右手握住後子手柄並反覆轉動,順時針轉動時箭頭向外移動,逆時針轉動時停止。 The present invention provides a hand tool, which solves the problem of fastener slippage through a plurality of input members containing one-way bearings, and uses an optical indicator to solve the problem of identifying direction. Question, the optical indicator shows the direction with a moving arrow. When the user's hand holds the hand tool and the arrow points to the outside, the entire assembly only transmits clockwise rotation to fasten the fasteners. When the user holds the main handle with the left hand, the window faces upwards, and the right hand holds the rear handle and rotates repeatedly , The arrow will move outward when turning clockwise, and stop when turning counterclockwise.

另一方面,當用戶的手握住手工具並且箭頭指向內側時,整個組件僅傳遞逆時針旋轉,從而退出緊固件,當用戶用左手握住主手柄,窗口朝上,右手握住後子手柄並反覆轉動時,逆時針轉動時箭頭向內移動,順時針轉動時停止。 On the other hand, when the user's hand holds the hand tool and the arrow points to the inside, the entire assembly only transmits counterclockwise rotation, thereby exiting the fastener. When the user holds the main handle with the left hand, the window faces upwards, and the right hand holds the rear handle When it rotates repeatedly, the arrow moves inward when it rotates counterclockwise, and it stops when it rotates clockwise.

10:軸 10: axis

12:圓柱面 12: Cylindrical surface

122:螺旋圖案 122: spiral pattern

14:孔 14: Hole

16:磁體 16: Magnet

18:離合凹部 18: Clutch recess

20:主手柄 20: Main handle

22:外表面 22: outer surface

24:凹槽 24: Groove

26:通道 26: Channel

28:窗口 28: window

30:透鏡 30: lens

32:外表面 32: outer surface

322:箭頭 322: Arrow

34:第一內表面 34: first inner surface

36:第二內表面 36: second inner surface

362:聚焦線 362: Focus Line

38:前表面 38: front surface

40:子手柄 40: Sub handle

42:外表面 42: outer surface

44:凹槽 44: Groove

46:通道 46: Channel

48:凹槽 48: Groove

50:組裝構件 50: Assemble components

52:孔 52: hole

60:離合構件 60: Clutch member

62:外表面 62: outer surface

64:前側 64: front

66:通道 66: Channel

68:後側 68: rear side

610:滾柱 610: Roller

70:工具構件 70: Tool components

72:工具側 72: Tool side

74:柄部 74: handle

80:緊固件 80: Fastener

82:螺紋 82: Thread

第1圖係本發明之第一實施例透視圖。 Figure 1 is a perspective view of the first embodiment of the present invention.

第2圖係本發明之第一實施例***視圖。 Figure 2 is an exploded view of the first embodiment of the present invention.

第3圖係本發明之第一實施例剖視圖。 Figure 3 is a cross-sectional view of the first embodiment of the present invention.

第4圖係本發明之第一實施例透視圖,呈現透鏡和軸件。 Figure 4 is a perspective view of the first embodiment of the present invention, showing the lens and the shaft.

第5圖係本手工具之操作實例圖,呈現鎖緊的使用狀態。 Figure 5 is an example of the operation of this hand tool, showing the locked state of use.

第6圖係本手工具之操作實例圖,呈現放鬆的使用狀態。 Figure 6 is an example of the operation of this hand tool, showing a relaxed state of use.

第7圖係本發明之第二實施例***視圖。 Figure 7 is an exploded view of the second embodiment of the present invention.

第8圖係本發明之第二實施例剖視圖。 Figure 8 is a cross-sectional view of the second embodiment of the present invention.

參照第1~3圖,本發明手工具的第一實施例描述如下。本手工具包括軸10、主手柄20、透鏡30、兩個子手柄40、兩個組裝構件50、多 個離合構件60和工具構件70。在該實施例中,離合構件60表示為單向軸承。在其他實施例中,離合構件60可以由集成的單向軸承代替。每個離合構件60具有外表面62、前側64、通道66和後側68,其中外表面62通常為多邊形柱體。軸10通常為圓柱形,具有圓柱面12,其上具有螺旋圖案122,並且兩端有孔14,在其內部具有磁體16,用於固定工具構件70。工具構件70具有工具側72以及柄部74,工具側72用於接合緊固件80,柄部74通常為多邊形柱體,用於***軸10的一個孔14中。本實施例中的緊固件80表示為螺釘。透鏡30由透明材料製成,並具有外表面32、第一內表面34、第二內表面36和前表面38,子手柄40通常為圓柱形,具有外表面42、凹槽44、通道46和凹槽48。組裝構件50通常為硬幣形狀,在其中心具有孔52。主手柄20通常為多邊柱形,具有外表面22、兩個凹槽24、通道26和窗口28。 Referring to Figures 1 to 3, the first embodiment of the hand tool of the present invention is described as follows. The hand tool includes a shaft 10, a main handle 20, a lens 30, two sub-handles 40, two assembly components 50, and more A clutch member 60 and a tool member 70. In this embodiment, the clutch member 60 is represented as a one-way bearing. In other embodiments, the clutch member 60 may be replaced by an integrated one-way bearing. Each clutch member 60 has an outer surface 62, a front side 64, a channel 66, and a rear side 68, where the outer surface 62 is generally a polygonal cylinder. The shaft 10 is generally cylindrical and has a cylindrical surface 12 with a spiral pattern 122 thereon, and holes 14 at both ends, and a magnet 16 inside it for fixing the tool member 70. The tool member 70 has a tool side 72 and a handle 74 for engaging the fastener 80. The handle 74 is usually a polygonal cylinder for inserting into a hole 14 of the shaft 10. The fastener 80 in this embodiment is represented as a screw. The lens 30 is made of a transparent material and has an outer surface 32, a first inner surface 34, a second inner surface 36, and a front surface 38. The sub-handle 40 is generally cylindrical and has an outer surface 42, a groove 44, a channel 46, and Groove 48. The assembly member 50 is generally in the shape of a coin and has a hole 52 in the center thereof. The main handle 20 is generally polygonal cylindrical, with an outer surface 22, two grooves 24, a channel 26 and a window 28.

在該實施例中,兩個離合構件60***主手柄20的兩個凹槽24中,其前側64面向相同方向。接著,軸10***主手柄20的通道26以及兩個離合構件60的通道66中。透鏡30安裝在窗口28中,其外表面32與主手柄20的外表面22對齊並合併。兩個子手柄40安裝在整個組件上,其凹槽44朝外,軸10位於其通道46內,此時,兩個子手柄40與主手柄20略微接觸,軸不突出子手柄如。另外兩個離合構件60***兩個子手柄40的凹槽44中,其前側64面向與主手柄20內部的兩個離合構件60相同的方向,同時,軸10穿過兩個其中的通道66。接著,兩個組裝構件50安裝在軸10上,其孔52緊緊地套在其上,而兩個組裝構件50都沒入到凹槽48中並完成了該實施例的組裝。工具構件70可以***其中一個孔14中並且透過磁體16定位。 In this embodiment, the two clutch members 60 are inserted into the two grooves 24 of the main handle 20, and the front sides 64 thereof face the same direction. Then, the shaft 10 is inserted into the channel 26 of the main handle 20 and the channel 66 of the two clutch members 60. The lens 30 is installed in the window 28 with its outer surface 32 aligned with and merged with the outer surface 22 of the main handle 20. The two sub-handles 40 are installed on the entire assembly with the groove 44 facing outwards and the shaft 10 is located in the channel 46. At this time, the two sub-handles 40 are slightly in contact with the main handle 20, and the shaft does not protrude from the sub-handle. The other two clutch members 60 are inserted into the grooves 44 of the two sub-handles 40, and the front side 64 thereof faces the same direction as the two clutch members 60 inside the main handle 20. At the same time, the shaft 10 passes through the two channels 66 therein. Next, the two assembling members 50 are installed on the shaft 10 with the holes 52 tightly sleeved thereon, and both the assembling members 50 are submerged in the groove 48 and the assembly of this embodiment is completed. The tool member 70 can be inserted into one of the holes 14 and positioned through the magnet 16.

參照第4圖,本發明手工具的光學指示器之原理描述如下。 通過將軸10和透鏡30分離出第一實施例,螺旋圖案122的部分圖像直接向前進入第一內表面34並最終由外表面32顯示,其中該部分圖像向右偏移;在另半邊,透鏡30的左側部分由第二內表面36和外表面32的左部分形成具有聚焦線362的垂直凸透鏡(如圖4中的點所示),該聚焦線362在第二內表面36和圓柱面12之間。其中螺旋圖案122的部分圖像首先收縮到聚焦線362中,水平反轉,並投影到第二內表面36上,最終由外表面32顯示,其中該部分圖像向左側部分移位並且被反轉。通過組合由外表面32顯示的所述兩個圖像,成為箭頭322。由於軸10的旋轉受到離合構件60的限制,軸只能逆時針旋轉,因此,螺旋圖案的局部圖像僅向上移動,從而箭頭在其指向的方向上向前移動。 Referring to Fig. 4, the principle of the optical indicator of the hand tool of the present invention is described as follows. By separating the shaft 10 and the lens 30 from the first embodiment, a part of the image of the spiral pattern 122 directly enters the first inner surface 34 and is finally displayed by the outer surface 32, where the part of the image is shifted to the right; Half, the left part of the lens 30 is formed by the second inner surface 36 and the left part of the outer surface 32 to form a vertical convex lens with a focus line 362 (as shown by the dot in FIG. 4), which is on the second inner surface 36 and Between the cylindrical surfaces 12. The part of the image of the spiral pattern 122 is first contracted into the focus line 362, inverted horizontally, and projected onto the second inner surface 36, and finally displayed on the outer surface 32, where the part of the image is partially shifted to the left and reversed. turn. By combining the two images displayed by the outer surface 32, it becomes an arrow 322. Since the rotation of the shaft 10 is restricted by the clutch member 60, the shaft can only be rotated counterclockwise, therefore, the partial image of the spiral pattern only moves upward, so that the arrow moves forward in the direction it points.

如第5圖所示,當手工具由使用者的手握住並且箭頭指向外時,整個組件僅傳遞順時針旋轉而拴緊緊固件。當使用者用左手握住主手柄20、窗口28朝上,右手握住後子手柄40並反覆轉動,箭頭在順時針轉動時向外移動,在逆時針轉動時停止。 As shown in Figure 5, when the hand tool is held by the user's hand and the arrow points outward, the entire assembly only transmits clockwise rotation to tighten the fastener. When the user holds the main handle 20 with the left hand and the window 28 faces upward, and the right hand holds the rear sub-handle 40 and rotates repeatedly, the arrow moves outward when it rotates clockwise, and stops when it rotates counterclockwise.

如第6圖所示,當手工具由使用者的手握住並且箭頭指向內時,整個組件僅傳遞逆時針旋轉而退出緊固件。當使用者用左手握住主手柄20、窗口28朝上,右手握住後子手柄40並反覆轉動,箭頭在逆時針轉動時向內移動,在順時針轉動時停止。 As shown in Figure 6, when the hand tool is held by the user's hand and the arrow points inward, the entire assembly only transmits counterclockwise rotation and exits the fastener. When the user holds the main handle 20 with the left hand and the window 28 faces upward, and the right hand holds the rear sub-handle 40 and rotates repeatedly, the arrow moves inward when it rotates counterclockwise, and stops when it rotates clockwise.

參照第7-8圖,第二實施例是第一實施例的變型,具有集成離合機構,描述如下。根據第一實施例,離合構件60集成到軸10中並且由軸10的圓柱面12上的多個離合凹部18以及其中的多個滾柱610代替。在該實施例中,主手柄20中的凹槽24由通道26的延伸部分代替,子手柄40中的凹 槽44由通道46的延伸部分代替。離合凹部18允許滾柱610在一個方向上自由旋轉,而在另一個方向上,滾柱610向外移動並鎖定通道26或通道46,其中限制了主手柄20或子手柄40與軸10之間的相對旋轉。因此,整個組件具有與第一實施例相同的特徵。 Referring to Figures 7-8, the second embodiment is a modification of the first embodiment, with an integrated clutch mechanism, as described below. According to the first embodiment, the clutch member 60 is integrated into the shaft 10 and replaced by a plurality of clutch recesses 18 on the cylindrical surface 12 of the shaft 10 and a plurality of rollers 610 therein. In this embodiment, the groove 24 in the main handle 20 is replaced by the extension of the channel 26, and the groove in the sub handle 40 The groove 44 is replaced by an extension of the channel 46. The clutch recess 18 allows the roller 610 to rotate freely in one direction, and in the other direction, the roller 610 moves outward and locks the channel 26 or the channel 46, which restricts the main handle 20 or the sub-handle 40 and the shaft 10 The relative rotation. Therefore, the entire assembly has the same features as the first embodiment.

20‧‧‧主手柄 20‧‧‧Main handle

30‧‧‧透鏡 30‧‧‧Lens

322‧‧‧箭頭 322‧‧‧Arrow

40‧‧‧子手柄 40‧‧‧Sub handle

70‧‧‧工具構件 70‧‧‧Tool Components

Claims (4)

一種手工具至少包含:一個軸、一個主手柄、一個透鏡、兩個子手柄、多個離合構件、兩個組裝構件和一個工具構件,其中,透鏡組裝在主手柄的窗口上,兩個離合構件以相同朝向安裝在主手柄的兩個凹槽中,軸***主手柄以及兩個離合構件的通道中,兩個子手柄以其後側碰觸主手柄的兩端,軸的兩端分別***其通道,另兩個離合構件安裝在兩個子手柄的凹槽中,其朝向與安裝在主手柄上的兩個離合構件相同,兩個組裝構件安裝在兩個子手柄的凹槽中,其孔緊緊地固定住軸的兩端,工具構件之柄部***軸上之任一個孔,至此完成手工具之組裝,其特徵在於,所述軸在其圓柱形表面上具有螺旋圖案,並且所述透鏡具有不平坦表面,在所述不平坦表面中,其第一內表面夠以一定距離移動並通過圖像,而第二內表面移動圖像並且使其水平翻轉,從而使軸上的螺旋圖案通過透鏡變成了箭頭;而當其中一個子手柄沿第一方向旋轉時,軸不會相對於主手柄旋轉而箭頭狀符號保持靜止,當其中一個子手柄沿第二方向旋轉時,軸相對於主手柄的第二方向旋轉,其中箭頭向前移動以指示操縱方向;利用以上特徵,並以工具構件***不同的孔中,以分別達到鎖緊或退出緊固件的功能。 A hand tool at least includes: a shaft, a main handle, a lens, two sub-handles, a plurality of clutch members, two assembly members and a tool member, wherein the lens is assembled on the window of the main handle, and the two clutch members Installed in the two grooves of the main handle with the same orientation, the shaft is inserted into the passage of the main handle and the two clutch members, the two sub-handles touch the two ends of the main handle with their back sides, and the two ends of the shaft are inserted into them respectively. Channel, the other two clutch members are installed in the grooves of the two sub-handles, and their orientation is the same as the two clutch members installed on the main handle. The two assembly members are installed in the grooves of the two sub-handles. Tightly fix both ends of the shaft, insert the handle of the tool member into any hole on the shaft, and thus complete the assembly of the hand tool, characterized in that the shaft has a spiral pattern on its cylindrical surface, and the The lens has an uneven surface in which the first inner surface can move a certain distance and pass through the image, while the second inner surface moves the image and turns it horizontally, so that the spiral pattern on the axis The lens turns into an arrow; when one of the sub-handles rotates in the first direction, the axis will not rotate relative to the main handle but the arrow-shaped symbol remains stationary. When one of the sub-handles rotates in the second direction, the axis is relative to the main handle. The handle rotates in the second direction, where the arrow moves forward to indicate the direction of manipulation; using the above features, and inserting tool components into different holes to achieve the function of locking or withdrawing the fasteners respectively. 如申請專利範圍第1項的手工具,其中軸的各孔內部具有磁體,當工具構件以其柄部***孔中,磁體之磁力會將其保持在適當位置。 For example, the hand tool of the first item in the scope of the patent application has a magnet in each hole of the shaft. When the tool member is inserted into the hole with its handle, the magnetic force of the magnet will keep it in place. 一種手工具至少包含:一個軸、一個主手柄、一個透鏡、兩個子手柄、多個滾柱、兩個組裝構件和一個工具構件,其中,透鏡組裝在主手柄的窗口上,滾柱安裝在軸上的所有離合凹部中,軸***主手柄的通道,兩個子手柄以其後側碰觸主手柄的兩端,軸的兩端分別***其通道,兩個組裝構件安裝在兩個子手柄的凹槽中,其孔緊緊地固定住軸的兩端,軸上之離合凹部允許滾柱在一個方向上自由旋轉,而在另一個方向上,滾柱向外推擠並鎖住主手柄或子手柄的通道,進而限制了主手柄或子手柄相對於軸的旋轉,工具構件之柄部***軸上之任一個孔,至此完成手工具之組裝,其特徵在於,所述軸在其圓柱形表面上具有螺旋圖案,並且所述透鏡具有不平坦表面,在所述不平坦表面中,其第一內表面夠以一定距離移動並通過圖像,而第二內表面移動圖像並且使其水平翻轉,從而使軸上的螺旋圖案通過透鏡變成了箭頭;而當其中一個子手柄沿第一方向旋轉時,軸不會相對於主手柄旋轉而箭頭狀符號保持靜止,當其中一個子手柄沿第二方向旋轉時,軸相對於主手柄的第二方向旋轉,其中箭頭向前移動以指示操縱方向;利用以上特徵,並以工具構件***不同的孔中,以分別達到鎖緊或退出緊固件的功能。 A hand tool includes at least: a shaft, a main handle, a lens, two sub-handles, a plurality of rollers, two assembly members and a tool member, wherein the lens is assembled on the window of the main handle, and the roller is installed on the window of the main handle. In all the clutch recesses on the shaft, the shaft is inserted into the channel of the main handle. The two sub-handles touch the two ends of the main handle with their back sides. The two ends of the shaft are inserted into the channels respectively. Two assembly components are installed in the two sub-handles. In the groove, the hole tightly fixes the two ends of the shaft, the clutch recess on the shaft allows the roller to rotate freely in one direction, and in the other direction, the roller pushes outward and locks the main handle Or the passage of the sub-handle, thereby restricting the rotation of the main handle or the sub-handle relative to the shaft, the handle of the tool component is inserted into any hole on the shaft, and the assembly of the hand tool is completed so far, characterized in that the shaft is in its cylindrical The shaped surface has a spiral pattern, and the lens has an uneven surface in which the first inner surface can move a certain distance and pass the image, and the second inner surface moves the image and makes it Flip horizontally, so that the spiral pattern on the shaft turns into an arrow through the lens; and when one of the sub-handles rotates in the first direction, the shaft will not rotate relative to the main handle and the arrow-shaped symbol remains stationary. When rotating in the second direction, the shaft rotates relative to the second direction of the main handle, where the arrow moves forward to indicate the direction of manipulation; using the above features, and inserting tool components into different holes to lock or withdraw the fasteners respectively Function. 如申請專利範圍第3項的手工具,其中軸的各孔內部具有磁體,當工具構件以其柄部***孔中,磁體之磁力會將其保持在適當位置。 For example, the hand tool of item 3 in the scope of the patent application has a magnet inside each hole of the shaft. When the tool member is inserted into the hole with its handle, the magnetic force of the magnet will keep it in place.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742787A (en) * 1971-07-26 1973-07-03 Creative Tools Reversible drive ratchet hand tool with spherical handle
TWM296113U (en) * 2006-02-07 2006-08-21 Compass Corp Screwdriver with luminous display function
TWM316778U (en) * 2007-01-09 2007-08-11 Wei-Nan Shen Screwdriver tool with two adjustment torsion values
TW200838648A (en) * 2007-03-23 2008-10-01 Univ Nat Formosa Screwdriver tool capable of identifying specification and shape of workpiece
US20140137710A1 (en) * 2012-11-19 2014-05-22 Kabo Tool Company Torque Screwdriver Capable of Enhancing Torque and Maintain Torque Accuracy
WO2015155097A1 (en) * 2014-04-09 2015-10-15 Weber Instrumente Gmbh & Co. Kg Tool device, in particular hand-held tool device, featuring torque limitation
TWM517063U (en) * 2015-09-21 2016-02-11 Jing Chen Improved structure for wrench
CN109866162A (en) * 2017-12-01 2019-06-11 济宁新信意信息科技有限公司 Novel work spanner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742787A (en) * 1971-07-26 1973-07-03 Creative Tools Reversible drive ratchet hand tool with spherical handle
TWM296113U (en) * 2006-02-07 2006-08-21 Compass Corp Screwdriver with luminous display function
TWM316778U (en) * 2007-01-09 2007-08-11 Wei-Nan Shen Screwdriver tool with two adjustment torsion values
TW200838648A (en) * 2007-03-23 2008-10-01 Univ Nat Formosa Screwdriver tool capable of identifying specification and shape of workpiece
US20140137710A1 (en) * 2012-11-19 2014-05-22 Kabo Tool Company Torque Screwdriver Capable of Enhancing Torque and Maintain Torque Accuracy
WO2015155097A1 (en) * 2014-04-09 2015-10-15 Weber Instrumente Gmbh & Co. Kg Tool device, in particular hand-held tool device, featuring torque limitation
TWM517063U (en) * 2015-09-21 2016-02-11 Jing Chen Improved structure for wrench
CN109866162A (en) * 2017-12-01 2019-06-11 济宁新信意信息科技有限公司 Novel work spanner

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