1355989 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種活動扳手，特別係關於一種既可快速調整 亦可微調兩顎開口大小之活動扳手者。 【先前技術】 習用活動扳手之活動顎係設成可相對滑道面滑移者，進而調 整其與固定顎間的開口大小。部分活動扳手係搭配一齒塊而調整 上述開口大小，如美國專利1523093號所示，然此種活動扳手並 不具有微調功能，其並非漸進式地調整兩顎間的開口大小，是以 兩顎夾與螺固件之間無可避免地具有間隙而不利完全咬合。 另一種常見的活動扳手係搭配一成螺紋狀之蝎姆，並藉由轉 動該蝸姆而帶動活動顎滑移。此種活動扳手雖具有可微調兩顎間 的開口大小，然市面上並未見有其活動顎可相對滑道面快速滑移 之功能者。先齡有部分針對活動顎快速調整魏之討論，然因 遭遇技術上的困難而不易製造、難以量產推廣。 例如美國專利1334392號所示’其揭示—可快速調整之管 夾’其_係可娜性地赫動麵部騰抵糊係，令活動顆 可快速滑移’朗其係將細姆麟、活動顆及其他細機構額 外設置於柄部側邊，與本發断討論之_扳手麵巾，該蜗姆 及活動顎齒排皆係設置於頭部内相比，可知該美國專利荦之活動 扳手體魏大、組裝不易，並不符合目前手工具之設計趨勢。 另外，美國專利1228850號及14〇7528號各揭示了一種活動 扳手/、蜗姆機構及活動顆齒排皆係S置於頭部内，該螞姆機構 雖可選擇性地與齒排麟咬合聽，餅铸有二主要問題：⑴ 該堝姆機射係—難設’另端雜擺的方式結合於頭部，此種 樞擺手段將直接導致卿麟德辦，其赫排之職呈非平 行排列，而不利該齒排與蝸姆機構再次對位咬合；（2)另一難以 解決的問題在於，為提供足夠空間供堝姆機構之鱗樞擺，必須 利用銑刀輔長縱向的職，該長縱向職的水平深度過大，致 使銳刀在高猶轉鋪時，該銑刀整侧面受力㈣朝縱向弯 曲’且其彎曲幅度隨水平深度增加而遞增，是故在銑刀高速旋轉 夺將4成銑刀刀身疲勞破壞而斷裂的情形發生，乃係此種設計 無法量產甚至實現的主要原因之一。 有鑑於此，如何提供一種兼具快速調整與微調功能之活動扳 手’同時又可提升效能、降低成本並實現量產化，乃為本發明著 眼之重點。 【發明内容】 本發月之主要目的是提供一種兼具快速調整與微調功能之活 動扳手。 —2了達成上述目的所提供之活動扳手包括一柄部、一頭部、 + ^疋顎/舌動顯、—定位單元、一蜗姆（worm gear)及-彈 ^早το。该頭部具有—滑槽及連通滑槽之容置槽，於滑槽頂面形 、面該錢酬具有—齒排，該齒排係可滑移地容 U槽内疋明活_可沿該制面滑移讀近或遠離該固 ^355989 定顎。此外，該定位單祕設置於容置_，其包括—對平行且 ]隔叹置之’部’各該臂部具有—沿其延伸方喊置之長槽。該 蜗姆c括術于及一概.呈圓柱形之鑛齒部’該轴桿設置於鑛齒部 之轴心處’該織雜_對臂部之間，姉桿二端分別容置於 該對臂部的長槽内’令該_可沿該長槽延伸方向直線滑移，該 鑛齒部並選擇性軸該㈣成咬合_，而該賴侧提供蜗姆 朝齒排方向鶴之力。其中，贿齒部具有成螺紋狀的鑛齒，該 鑛齒具有-前斜面及-餅面，贿斜面係於騎雜手工作扳 轉時供齒馳頂，該後斜_係於活__定顎方向滑移時供 齒排推抵者。 藉由上述設計，本發明之蝎姆機構可選擇性地與齒排脫離抵 頂關係，卻免除習職藝之長縱向繼不易加W缺失，故本發 明之活動扳手製造難度大幅降低，在降低成本的同時，更進一步 讓量產成為可能。藉此，將有利於此種兼具快速調整與微調功能 之活動扳手的推廣使用’制造福廣大活動扳手使用者。 【實施方式】 以下將藉由數實施例說明本發明之結構特徵、操作方式及其 預期達成之功效，然並非用以限制本發明所欲保護之範脅，合先 敘明。 ° /先’請參考圖1至圖3八。在本發明之較佳實施例中，該活 動扳手係包括-柄部10、-頭部20、一固定顆3〇、一活動顆仙、 一定位單元50、一堝姆60、一彈性單元7〇及一固定手段。其中， 1355989 該柄部10係供使用者握持，該頭部20設置於柄部10 —端，該頭 部20具有一滑槽21及一容置槽22，該滑槽21與容置槽22相互 連通’於滑槽21頂面形成有一滑道面23，較佳者，該容置槽22 係成貫穿頭部20之設計而概呈四方孔 雖然本實施例僅於柄部i 〇 一端δ又有供驅動螺固件之頭部2〇,然柄部1〇另端亦可依需求設置 與頭部20相同或不同類型之驅動頭，以增加使用上的彈性。1355989 VI. Description of the Invention: [Technical Field] The present invention relates to a spanner wrench, and more particularly to an adjustable wrench that can quickly adjust or fine tune the size of two openings. [Prior Art] The activity of the conventional spanner is designed to be able to slide relative to the slide surface, thereby adjusting the size of the opening between the movable jaw and the fixed jaw. Some of the adjustable wrenches are adjusted with a tooth block to adjust the size of the opening. As shown in U.S. Patent No. 1,523,093, the adjustable wrench does not have a fine adjustment function, and it is not a progressive adjustment of the opening size between the two turns. There is inevitably a gap between the clip and the screw without being completely engaged. Another common spanner is paired with a threaded cymbal and is driven to move by moving the worm. Although the adjustable wrench has the ability to fine-tune the opening between the two turns, there is no function on the market that can be used to quickly slide relative to the slide surface. Some of the advanced ages have quickly adjusted Wei's discussion on activities, but they are not easy to manufacture due to technical difficulties, and it is difficult to promote mass production. For example, as shown in U.S. Patent No. 1,334,392, the disclosure of the invention discloses a tube clamp that can be quickly adjusted, and the surface of the tube can be lifted to the surface, so that the movable piece can be quickly slipped. The movable piece and other thin mechanism are additionally disposed on the side of the handle, and the wrecked face towel discussed in the present report, the worm and the movable dentition row are all disposed in the head, and the activity of the US patent is known. The wrench body is large and difficult to assemble, which does not meet the current design trend of hand tools. In addition, U.S. Patent Nos. 1,228,850 and 14,75, each disclose an adjustable wrench/, a volute mechanism, and a movable tooth row in which the S is placed in the head, and the ol mechanism can selectively engage with the tooth row. Listening, there are two main problems in cake casting: (1) The 埚 机 机 — — — 难 难 难 难 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另 另Non-parallel arrangement, but the tooth row and the volute mechanism are again aligned. (2) Another problem that is difficult to solve is that in order to provide sufficient space for the squaring pivot of the 埚 机构 mechanism, it is necessary to use the milling cutter to assist the longitudinal direction. Position, the length of the long longitudinal position is too large, causing the sharp knife to be turned on the whole side of the knife, the whole side of the milling cutter is forced (four) to bend in the longitudinal direction' and its bending amplitude increases with the increase of the horizontal depth, so the high speed of the milling cutter One of the main reasons why this design cannot be mass-produced or even realized is that the rotation of the cutter body is broken and fractured. In view of this, how to provide an activity wrench that has both rapid adjustment and fine-tuning functions while improving performance, reducing costs, and mass production is the focus of the present invention. SUMMARY OF THE INVENTION The main purpose of this month is to provide an active wrench that has both quick adjustment and fine adjustment functions. - 2 The adjustable wrench provided for the above purpose includes a handle, a head, a + ^ 疋颚 / tongue display, a positioning unit, a worm gear, and a bomb. The head has a sliding groove and a receiving groove for connecting the sliding groove, and the top surface of the sliding groove has a tooth row, and the tooth row is slidably accommodated in the U groove. The surface slip is read near or away from the solid 355989. In addition, the positioning unit is disposed in the accommodating_, which includes - the pair of parallel and slanting portions of each of the arms having the long groove shouting along the extending direction thereof. The worm has a cylindrical toothing portion 'the shaft is disposed at the axial center of the ore tooth portion', and the two ends of the mast are respectively accommodated in the shaft In the long groove of the arm, the _ can be linearly slid along the extending direction of the long groove, and the ore tooth selectively selects the (4) to engage the _, and the slant side provides the force of the worm toward the tooth row . Wherein, the bristle tooth portion has a threaded mineral tooth, the mineral tooth has a front bevel surface and a cake surface, and the bribe slope surface is provided for the tooth to be topped when the riding hand is turned, and the rear oblique is tied to the live __ For the tooth row to be pushed when the direction is slipped. With the above design, the 蝎me mechanism of the present invention can selectively decouple from the tooth row, but the longitudinal length of the art is not easy to add W, so the manufacturing of the adjustable wrench of the present invention is greatly reduced and reduced. At the same time of cost, mass production is made possible. In this way, it will be beneficial to the promotion of the use of the adjustable wrench with the quick adjustment and fine adjustment function. [Embodiment] The structural features, the operation modes, and the intended effects of the present invention are described by way of example only, and are not intended to limit the scope of the present invention. ° / first ‘Please refer to Figure 1 to Figure 8. In a preferred embodiment of the present invention, the adjustable wrench comprises a handle 10, a head 20, a fixed piece 3〇, a movable piece, a positioning unit 50, a 60 60, and an elastic unit 7. And a fixed means. The handle portion 10 is provided for the user to hold. The head portion 20 is disposed at the end of the handle portion 10. The head portion 20 has a sliding slot 21 and a receiving slot 22, and the sliding slot 21 and the receiving slot 22 is interconnected with a chute surface 23 formed on the top surface of the chute 21. Preferably, the accommodating groove 22 is formed into a square hole through the design of the head 20, although the embodiment is only for the shank i The end δ has a head 2 for driving the screw, and the other end of the handle 1 can also be provided with the same or different types of driving heads as the head 20 to increase the elasticity of use.
該固定顎30係固設於頭部2〇 —端，該活動顎4〇則具有一位 於其底端之齒排41，該齒排41係可滑移地容置於該滑槽21内， 疋以該活賴4〇可沿該滑道面23之延伸方向滑移而靠近或遠離 該固定顆3G，進而改變該活動扳手之兩嫩開口大小。 該定位單元50係設置於該容置槽22内，該定位單元％包括 一對平行且間隔設置之臂部51，以.及連接於該二臂部51底端之連 結部52 (惟於本實施例中，該連結部52亦可省略而不設置），該 連結部52較佳者係與臂部51—體成型_以固定該二臂部51之 相對位置，令該定位單元5G概呈uI各爾部51具有一沿其 延伸方向設置之長槽53，且各該臂部51更騎有—連通長槽幻 之孔洞54 ’該孔洞54遠離長槽53之一端則可依需求而設計成封 閉狀或垂直貫穿該臂部51底面（如本實施例所幻。該彈性單元 70係用以提供堝姆60朝齒排41方向移動之力，其包括二彈箸η， 該二彈簧71齡淑置_二料51之⑽％内，且各該 71之-端抵頂於堝姆60之軸桿61。當該孔洞％呈貫穿設計時， 該彈簧遠離_丨之，可抵頂於铜部，並_定位該定 1355989 位單元與頭部之間的相對位置使用。 =略段個職定位單元5G與頭部2g之間的相對位 ’其^括-銷81及-銷孔82，較佳者更包括—副義及一副 鎖孔84，該銷㈣係概呈圓孔（亦可為其他形狀）而橫向設置於 該頭部2〇上，且該銷孔82連通於該容置槽22，該銷8ι則插設固 定於銷孔82内’且該銷81的一端頂設於其中-臂部51之長槽内. 而該副銷孔84 -端連通該容置槽22，另端呈封閉狀，該副銷们 设置於副軌84内，該_ 83 ―端頂設於另—臂部Μ之長槽内， 該蜗姆60之軸桿61恰位於簡81及副銷83之間，並令定位單 元之相對位置得以固定。又，該銷81與銷孔幻較佳者係具有螺 紋而相互m藉此可微觸銷81之斜位置及其與轴1 之間的鬆緊程度。 、 該蝎姆60包括上述軸桿61及一概呈圓柱形之鑛齒部62，該 軸桿6丨設置於顯部62之軸心處，該鑛齒部62係位於該對臂部 51之間，該軸桿61兩端分別容設_射部51的長槽％内，令 該蜗姆60可沿該長槽53延伸方向直線滑移，且由於轴桿61 _ 皆可滑動，使螞姆60得以與齒排41概呈平行地上下移動。該鑛 齒部62。係選擇性地與該齒排41成咬合關係，亦即，因該蜗姆恥 文彈性早TL 70推抵，該鑛齒部62於正常狀態下係與齒排咬合， 而當使用者撥動堝姆60向下時，該軸部62即可與齒排41脫離 咬合關係，令活動顎40可沿滑道面23快速滑移。其中，該鑛齒 。丨5 62具有成螺紋狀之麵63，較佳者該鋸齒&係呈單―、連續 1355989 7蜗姆轴杯及齒排與滑道面23之間具有一傾斜角扪，該前斜面 與軸桿延伸方向之間同樣形成有-前斜角Θ2，且Θ1⑸2。此時， 該前斜角Θ2即可為一正角而方便加工製造，例如，傾斜角耵為 而如斜角Θ2為5° ’如此即可避免活動顎施力扳轉螺固件時^ 蝸姆受力自發向下移動的情形發生。 如圖6Α、6Β及圖7所示，在本發明之另一實施例中，其主 要零件概與前述實施例相同，惟其二孔洞54，係彼此平行設置於連 結部52上，該孔洞54，亦可貫穿該連結部52，該彈性單元除包括鲁 該二彈簧71外’更包括一抵頂片72 ’該二彈簀71係設置於該二 孔洞54内’各該彈簧71之一端係抵頂於抵頂片72之一面，彈簧 另端則抵頂於頭部20,而該抵頂片72之另面係包覆該蜗姆鑛齒部 62之一部分’較佳者，該抵頂片72上利用沖壓形成有二凸柱73， 供各該彈簧—端套設定位，且抵頂面72包覆鋪部62之一面係 -弧狀面’即如圖8所示’該弧狀面之弧度恰實質相等或略大於 鑛齒部62最大徑之弧度。由於本實施例係將彈性單元設於連結部# 52上’而非兩臂部51處，故可較為減縮該活動扳手頭部的寬度， 俾縮小活動扳手之體積與重量。 由上可知’本發明之活動扳手，不僅可利用旋轉堝姆而微調 兩顯夾之_’，更可藉由令卿與麟脫離咬合關係而令活 動顎可快速滑移，俾可快速難開口大小。啊，本發明藉由額 外裝设-定位單元，麟定位單元之加卫難度及成本，皆遠遠優 異於先讀藝；更明视說’由於本發明僅於臂部上開設長槽， 1355989 而不需於整個頭部開設，因臂部寬度較小，故銑刀於其上銳削長 槽時不會斷4 ’反之，先前技藝因直接在頭部銑削長縱向剖槽， 不僅加工困難，更會導致銑刀斷㈣繁之問題。故，本發明解決 長期以來峨兼具倾難與微調功能之活動扳手不利加工的問 題’達成降低成本之重要經濟因素，同時令量產化成為可能，即 可望造福廣大使用者。 此外，上述具有可脫離齒排之蝸姆機構的活動扳手，皆為二 零年代左右的美國專利’至今超過8G年間，未有糊專利探討解 決刖述問題之方法，尤其在活動扳手此一純熟的技術領域中，活 動扳手相關專利申請量不下數冑，卻未有如同本發明同時達到降 低成本1紐m現量統之_設計，找佐證本發明 確有顯著進步之功效而非可輕易完成者。 是故’本發明不僅結構新穎實用，更具有顯著進步之功效， 符合本國專利法相關規定，爰依法提起專利申請，鑑請鈞局早 曰核予專利，實感德便。 【圖式簡單說明】 圖1為本發明第一實施例之分解圖。 圖2為本發明第一實施例之組合圖。 圖3A為本發明第一實施例之部分剖面示意圖。 圖3B為本發明第一實施例使用狀態之剖面示意圖。 圖4為本翻第—實施例之_之示意職其部分放大圖。 1355989 圖5為本發明第二實施例之示意圖。 圖6A為本發明第三實施例之部分剖面示意圖。 圖6B為本發明第三實施例使用狀態之剖面示意圖 圖7為圖6A之AA剖面圖。 圖8為本發明第三實施例之抵頂片之示意圖。 【主要元件符號說明】 10 :柄部 20 :頭部 21 :滑槽 22 :容置槽 23 :滑道面 30 :固定顎 40 :活動顎 •41 :齒排 50 :定位單元 51 :臂部 52 :連結部 53 :長槽 54、54’ ：孔洞 60 :蝸姆 61 :轴桿 62 :鋸齒部 63 :鋸齒 64 :前斜面 65 :後斜面 70 :彈性單元 71 :彈簧 72 :抵頂片 73 :凸柱 81 :銷 82 :銷孔 83 :副銷 84 :副銷孔 Θ1 :傾斜角 Θ2 :前斜角 Θ3 :後斜角The fixed jaw 30 is fixed to the end of the head 2, and the movable jaw 4 has a tooth row 41 at the bottom end thereof, and the tooth row 41 is slidably received in the sliding slot 21 The slidable portion of the movable wrench can be changed by sliding along the extending direction of the slide surface 23 to approach or away from the fixed piece 3G. The positioning unit 50 is disposed in the accommodating groove 22, and the positioning unit includes a pair of parallel and spaced arm portions 51, and a connecting portion 52 connected to the bottom end of the two arm portions 51 (only this In the embodiment, the connecting portion 52 can also be omitted, and the connecting portion 52 is preferably formed integrally with the arm portion 51 to fix the relative position of the two arm portions 51, so that the positioning unit 5G is The UI portion 51 has a long groove 53 disposed along the extending direction thereof, and each of the arm portions 51 is further provided with a long hole-shaped hole 54. The hole 54 is away from the end of the long groove 53 and can be designed according to requirements. The bottom surface of the arm portion 51 is closed or vertically. As shown in the embodiment, the elastic unit 70 is used to provide a force for moving the 埚 60 toward the tooth row 41, and includes two elastic 箸, the two springs 71. Within the (10)% of the second material, and the end of each of the 71 ends against the shaft 61 of the 60. When the hole is in the design, the spring is far away from the 丨Bronze, and _ position the relative position between the 1355989 bit unit and the head. = Slightly position the positioning unit 5G and the head 2g The relative position 'there is a pin 81 and a pin hole 82. Preferably, the pin includes a pair of a pair of key holes 84. The pin (4) is generally circular (or other shape) and laterally disposed on The pin 2 is connected to the accommodating groove 22, and the pin 8 is inserted into the pin hole 82 and the one end of the pin 81 is disposed in the long groove of the arm portion 51. The auxiliary pin hole 84-end communicates with the accommodating groove 22, and the other end is closed. The auxiliary pins are disposed in the sub-track 84, and the _83-end is disposed on the long groove of the other arm portion The shaft 61 of the volute 60 is located between the simple 81 and the auxiliary pin 83, and the relative position of the positioning unit is fixed. Moreover, the pin 81 and the pin hole are preferably threaded and mutually borrowed. The oblique position of the micro-contact pin 81 and its tightness with the shaft 1. The cymbal 60 includes the shaft 61 and a substantially cylindrical ore portion 62, and the shaft 6 is disposed on the display portion At the axial center of 62, the ore tooth portion 62 is located between the pair of arm portions 51. The two ends of the shaft rod 61 respectively accommodate the long groove % of the ejector portion 51, so that the worm 60 can follow the long groove. 53 extends in a straight line, and The shaft 61 _ is slidable so that the amp 60 can move up and down in parallel with the tooth row 41. The ore tooth portion 62 selectively engages with the tooth row 41, that is, due to the worm The razor elastic early TL 70 is pushed forward, and the ore tooth portion 62 is engaged with the tooth row in a normal state, and when the user pushes the 埚 60 downward, the shaft portion 62 can be disengaged from the tooth row 41. The relationship is such that the movable jaw 40 can be quickly slid along the slide surface 23. Among them, the ore tooth 丨5 62 has a threaded surface 63, preferably the sawtooth & is a single-, continuous 1355989 7 worm The shaft cup and the tooth row and the slide surface 23 have an inclined angle 扪, and the front bevel and the extending direction of the shaft are also formed with a front rake angle Θ2, and Θ1(5)2. At this time, the front bevel angle Θ2 can be a positive angle and is convenient for processing and manufacturing. For example, the inclination angle 耵 is as long as the bevel angle Θ 2 is 5°, so that the movable force can be prevented from being pulled when the screw is screwed. The situation of forced downward movement spontaneously occurs. As shown in FIG. 6A, FIG. 6 and FIG. 7, in another embodiment of the present invention, the main components are the same as those of the foregoing embodiment, but the two holes 54 are disposed in parallel with each other on the connecting portion 52. The elastic unit may also include an abutting piece 72 in addition to the two springs 71. The two magazines 71 are disposed in the two holes 54. Adjacent to one side of the topsheet 72, the other end of the spring abuts against the head 20, and the other side of the topsheet 72 encloses a portion of the coring tooth portion 62, preferably the topsheet 72 is formed by stamping with two protrusions 73 for each spring-end sleeve setting position, and the top surface 72 covers one of the surface-arc surface of the paving portion 62, that is, as shown in FIG. The curvature is substantially equal or slightly larger than the maximum diameter of the ore tooth portion 62. Since the elastic unit is disposed on the connecting portion #52 instead of the two arm portions 51, the width of the movable wrench head can be reduced and the volume and weight of the adjustable wrench can be reduced. It can be seen from the above that 'the adjustable wrench of the present invention can not only use the rotating 埚m to fine-tune the two display clips _', but also can make the activity 快速 can be quickly slipped by the occlusion relationship between Ling and Lin, so that it can be quickly opened. size. Ah, the present invention is superior to the prior art by the additional installation-positioning unit, and the difficulty and cost of the lining unit is far superior. It is more obvious that 'the invention only has a long groove on the arm, 1355989 It does not need to be opened in the whole head. Because the width of the arm is small, the milling cutter will not break when it is sharply cut into the long groove. On the contrary, the prior art is difficult to process because of the long longitudinal slot in the head. , it will lead to the problem of milling cutters (four). Therefore, the present invention solves the problem of unfavorable processing of the adjustable wrench which has long been difficult to perform and fine-tunes, and achieves an important economic factor for reducing costs, and at the same time makes mass production possible, which is expected to benefit the majority of users. In addition, the above-mentioned adjustable wrenches with the volute mechanism of the detachable tooth row are all US patents around the 1920s. So far more than 8G years, there is no ambiguous patent to explore ways to solve the problem, especially in the adjustable wrench. In the technical field, the number of patent applications related to the adjustable wrench is not limited, but there is no such thing as the invention achieves the cost reduction of 1 mm. The design proves that the invention has significant progress and can not be easily completed. By. Therefore, the invention not only has a novel and practical structure, but also has the effect of making remarkable progress. It complies with the relevant provisions of the national patent law, and filed a patent application according to law, so that the bureau can approve the patent as early as possible. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of a first embodiment of the present invention. Figure 2 is a combination diagram of the first embodiment of the present invention. Fig. 3A is a partial cross-sectional view showing the first embodiment of the present invention. Fig. 3B is a schematic cross-sectional view showing the state of use of the first embodiment of the present invention. Fig. 4 is a partially enlarged view showing the schematic position of the first embodiment. 1355989 Figure 5 is a schematic view of a second embodiment of the present invention. Figure 6A is a partial cross-sectional view showing a third embodiment of the present invention. Figure 6B is a cross-sectional view showing the state of use of the third embodiment of the present invention. Figure 7 is a cross-sectional view taken along line AA of Figure 6A. Figure 8 is a schematic view of a top sheet of a third embodiment of the present invention. [Main component symbol description] 10: Handle 20: Head 21: Chute 22: accommodating groove 23: Slide surface 30: Fixed 颚 40: Active 颚 • 41: Tooth row 50: Positioning unit 51: Arm 52 : connecting portion 53 : long groove 54 , 54 ′ : hole 60 : volute 61 : shaft 62 : serration 63 : serration 64 : front bevel 65 : rear bevel 70 : elastic unit 71 : spring 72 : abutting piece 73 : Bump 81 : Pin 82 : Pin hole 83 : Auxiliary pin 84 : Auxiliary pin hole Θ 1 : Tilt angle Θ 2 : Front bevel angle : 3 : Rear bevel angle
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