M308527 八、新型說明： 【新型所屬之技術領域】 本創作涉及一種SIM卡連接器’尤其涉及一種具有防 呆結構的SIM卡連接器。 【先前技術】 按，通訊的無地域性使現代人彼此之間的距離越來 越近，生活與溝通更為便利。其中最為輕便的裝置首推 鲁 移動電話，而 SIM ( Subscriber Identity Module )卡連接 器又廣泛應用於移動電話等諸多電子設備中。 SIM卡通常包含一端子陣列，用來與外部讀卡系統連 ' 接。SIM卡連接器通常包含一卡槽以及佈設於卡槽内之電 ’ 性接觸端子。SIM卡可以從卡槽中拔出，也可以插入卡槽 内。當SIM卡被插入SIM卡連接器時，SIM卡連接器端子 抵接SIM卡之端子陣列，從而實現二者間之電性導通。 # 為防止SIM卡錯誤的插入SIM卡連接器内，習知的 SIM卡連接裔内通常均設有防呆結構。請參閱第十三圖， • 一種習知具有防呆機構的SIM卡連接器300包含一絕緣座 體及由絕緣座體一側壁與其前端壁交接處形成的防呆斜 塊’當外部SIM卡200正確插入絕緣座體後，siM卡200 — 侧的缺腳剛好可以與絕緣座體上的防呆斜塊抵接，藉此 形成防呆效果。 惟’上述習知的SIM卡連接器，若SIM卡插反時，雖 5 M308527 然可以判別出SIM卡處於誤插狀態，但是很容易使得sm 卡20纟角：、1¾呆斜塊相碰撞’從而使sim卡遞受到損 害。且由於其是靠人丄進行判別，所以難免會出現判斷 不準確之情形發生。 【新型内容】 本創作目的係提供—種具有防呆結構的辑卡連接器，能夠 避免SIM卡又到贿而遭受損傷且能解翻斷，卡是否誤 插。該SIM卡連接器包括：絕緣鍊，該絕緣座體上開設有複數 端子才曰帛谷置通運及第二容置通道；複數信號端子，收容於 所述端子槽内；開關端子，包括分職容於第—容置通道和第二 谷置通迢的固定端子及可動端子，其中該固定端子包括第一固持 部及連接於第1持部的第—焊接部，該可動端子包括第二固持 部、分別由第二固持部伸出的彈性臂和第二焊接部以及連接於該 彈性臂末端的壓接部，該彈性臂具有位於頂部的抵接部，該抵接 部向上伸出絕緣座體，該壓接部向上抵接於所述固定端子；於正 確插入SIM卡時，SIM卡向下抵壓可動端子之抵接部而帶動壓接 部向下脫離固定端子；於反向插入SIM卡時，SIM卡不與可動端 子之抵接部相接觸。 如上所述，本創作之具有防呆結構的SIM卡連接器藉 由所增設的開關端子與外部電路板之間通過電性連接產 生電信號來判斷SIM卡是否誤插，從而避免SIM卡因碰撞 而遭受損傷，且能準確判斷出SIM卡是否誤插，進而達到 6 M308527 防呆之功效。 【實施方式】 為詳細說明本創作之技術内谷、構造特徵、所達成 目的及功效，以下茲例舉實施例並配合圖式詳予說明。 請參閱弟^一圖’本創作具有防呆結構的SIM卡連接p 100係包括一絕緣座體10，絕緣座體10上扣合一蓋板20， 絕緣座體10内部收容複數信號端子30以及一對用於防呆 的開關端子40。其中，所述開關端子40包括固定端子5〇 以及與該固定端子50相配合的可動端子60。 請參閱第二圖，絕緣座體10包括基板11，基板^於 前、後兩端開設有複數呈矩陣排列之端子槽12，該等端 子槽12上下貫穿基板11並縱向延伸至與外界連通。基板η 兩侧緣分別向上伸出縱向延伸之側壁13，基板11前端緣 向上延伸形成略高於侧壁13之擔牆14。擋牆14和基板11 具有前端面15 ’前端面15 —側開設有開關端子容置通道 16 〇 請參閱第三圖、第四圖及第九圖，所述開關端子容置通道16 包括第一容置通道17以及位於第一容置通道17下方的第二容置 通道18。第一容置通道π包括一第一水平槽171，以及一由該第 一水平槽171 —端豎直向下延伸形成的豎直槽172。其中，第一水 平槽m向後貫賴牆U，其底郷成於基板u上表面。豎直槽 172向下貝Μ亚於底端水平向外延伸貫穿 14而形成缺 7 M308527 口 173 ’豎直槽172並於大致中部向後凹陷形成插接槽i74。第二 容置通道18包括-位於第-水平槽171下方且與所述第一水補 平行的第二水平槽181 ’該第二水平槽⑻向後延伸至基板^内 部，該第二水平槽181於大致中部向上延伸從而連通至所述第一 水平槽πι大致中部形成連通槽182，該連通槽182並向上延伸至 第-水平槽⑺上方，向後延伸至第二水平槽181前方少許處而 與基板η上方外界連通。第二水平槽181前端並於相對一豐直槽 172 -側水平向外延伸後再於末端^直向下延伸貫穿基板u，而 後再於底端向_延伸，從而形成—大致呈臥υ字形 183 。 口 曰 請參閱第五圖，固定端子50具有第一固持部51，該第一固持 部51包括—呈橫向延倾形板狀之水平部52及由水平部52豎直 向下伸出的豎直部53。水平部52於後側中部略微向下凸伸出一壓 接塊54。登直部53於底端水平向料折形成第一焊接部％，登 直4 53亚於後侧中部延伸形成一插接部％，該插接部兄於上下 兩側分別凸伸出凸刺57。 :n @ ’可動端子6G具有—大致呈縱向延伸之矩形環 、、勺第一固持和该第二固持部包括前端部w、後端部62 :及㈣兩侧的側端部63。後端部62前端中部連接有位 I弟二固持部上方的彈性臂，該彈性臂包括由後端部62 :端中部斜向上延伸形成的連接臂64,以及由連接臂64 端向上f折延伸再向下彎折延伸而形成的弧形臂65， M308527 該弧形臂65 丁頁點處形成抵接告M6，該弧形冑65末端並 水平延伸形成壓接部67。另外，其中一側端部Μ於前端 處水平向外延伸後再向下彎折形成一彎折部68,該彎折 部68包括第一彎折部68卜由第一彎折部681末端向下伸出的豎 直壁682以及由g直壁682底端向内f折延伸的第二幻， 所述第二彎折部683末端向内水平延伸形鱗二焊 。 請參閱第七圖至繁 卡連接器i 0 0的組農 圖’本創作具有肖呆結構的s I μ 、^知詳述如下： 如弟七圖所示，信號俨 設的端子槽12内。所迷=^子30收容於絕緣座體10上開 絕緣座體10之基板唬端子30的接觸部31凸露出於 時，與SIM卡200達成雷"*，從而當外部之SIM卡200插入 電性連接。 言月結合第八圖和第九。 及可動端子60分別收容圖，開關端子4〇之固定端子50 道17與第二容置通道==所述絕緣座體10之第一容置通 52以及壓接塊54分 。其中，固定端子50之水平部 侧，該壓接塊54並向下伸、弟一水平槽Π1之前後兩 容於豎直槽172内，插拯入所述連通槽182。豎直部53收 Π4内（如第四圖所示）^56藉由凸刺V嵌扣入插接槽 於絕緣座體1 〇之義才 太于接4 5 5於缺口 17 3處露出 接。可動端子60之第—^底面從而與外部電路板進行焊 水平槽181邊沿處，彎拚^持。卩卡合於絕緣座體10之第二 4 68及第二焊接部69收容於卡合 9 M308527 槽183内，其中第二焊接部69露出於絕緣座體10之基板11 底面從而與外部電路板進行焊接。 可動端子60之後端部62上的連接臂64位於連通槽 182處。弧形臂65之頂點處的抵接部66伸出連通槽182並 . 和信號端子30之接觸部31大致位於同一水平面上。可動 端子60之壓接部67位於連通槽182處並向上抵接於固定 端子50之壓接塊54底部。對本創作而言，該壓接塊54並 • 非必要元件，可動端子60之壓接部67亦可向上抵接於固 定端子50之第一固持部51的水平部52底部，只要可動端 子60和固定端子50達成接觸之效果即可。 ’ 請參閱第十圖，蓋板20具有由兩侧向下伸出的側板 • 21，該侧板21卡合於絕緣座體10之侧壁13外侧。蓋板20 和絕緣座體10之間形成一收容空間120用於收容外部SIM 卡 200。 • 續請參閱第八圖及第九圖，本創作具有防呆結構的 SIM卡連接器100於使用前，固定端子50之壓接塊54壓靠 於可動端子60之壓接部67上，固定端子50之第一焊接部 55以及可動端子60之第二焊接部67均與外部電路板進行 焊接，從而使得固定端子50與可動端子60以及外部電路 板共同構成一電性回路。 請參閱第十一及第十二圖，本創作具有防呆結構的 SIM卡連接器100於使用時，當外部SIM卡200正確插入絕 M308527 緣座體10與蓋板20扣合後而形成的收容空間120内時，可 動端子60的弧形臂65之頂點處的抵接部66與SIM卡200接 觸，SIM卡200將抵接部66下壓，從而向下帶動可動端子 60之壓接部67與固定端子50之壓接塊54相脫離，從而產 生電信號以判斷SIM卡200已正確插入。當SIM卡200反向 插入時，由於SIM卡200之缺口不能與可動端子60之抵接 部66相擠壓從而無法使可動端子60之壓接部67與固定端 子50之壓接塊54相脫離，也就無法產生電信號，所以可 以判斷出SIM卡200處於錯誤插入狀態。 綜上所述，本創作之具有防呆結構的SIM卡連接器 100藉由所增設一對開關端子40與外部電路板進行電性 連接產生電信號來判斷SIM卡是否誤插，從而避免SIM卡 因碰撞而遭受損傷，且能準確判斷出SIM卡是否誤插，進 而達到防呆之功效。 【圖式簡單說明】 第一圖係本創作具有防呆結構的SIM卡連接器之立 體分解圖。 第二圖係本創作具有防呆結構的SIM卡連接器之絕 緣座體立體圖。 第三圖係本創作具有防呆結構的SIM卡連接器之容 置通道之局部放大圖。 第四圖係第一圖沿IV-IV之剖視圖。 11 M308527 第五圖係本創作具有防呆結構的SIM卡連接器之固 定端子之立體結構圖。 第六圖係本創作具有防呆結構的SIM卡連接器之可 動端子之立體結構圖。 ，第七圖係本創作具有防呆結構的SIM卡連接器之信 -號端子與開關端子組裝於絕緣座體時之立體結構圖。 第八圖係本創作具有防呆結構的SIM卡連接器之開 • 關端子組裝於開關端子容置通道時之局部放大圖。 第九圖係第七圖沿IX -IX之剖視圖。 第十圖係本創作具有防呆結構的SIM卡連接器之立 • 體組裝圖。 - 第十一圖係本創作具有防呆結構的SIM卡連接器與 外部之SIM卡之組裝示意圖。 第十二圖係第十一圖沿X Π -X Π之剖視圖。 • 第十三圖係習知SIM卡連接器之防呆結構示意圖。 【主要元件符號說明】 SIM卡連接器 100 絕緣座體 10 基板 11 端子槽 12 侧壁 13 擂牆 14 如端面 15 容置通道 16 第一容置通道 17 第二容置通道 18 蓋板 20 12 M308527 侧板 接觸部 固定端子 水平部 . 壓接塊 插接部 可動端子 後端部 連接臂 抵接部 * 彎折部 ^ 收容空間 豎直槽 插接槽 ® 連通槽 SIM卡 豎直壁 信號端子 30 開關端子 40 第一固持部 51 豎直部 53 第一焊接部 55 凸刺 57 前端部 61 侧端部 63 弧形臂 65 壓接部 67 第二焊接部 69 第一水平槽 171 缺口 173 第二水平槽 181 卡合槽 183 第一彎折部 681 第二彎折部 683 13M308527 VIII. New description: [New technical field] The present invention relates to a SIM card connector', in particular to a SIM card connector having a foolproof structure. [Prior Art] According to the non-regional nature of communication, the distance between modern people is getting closer and closer, and life and communication are more convenient. Among them, the most lightweight device is the first mobile phone, and the SIM (Subscriber Identity Module) card connector is widely used in many electronic devices such as mobile phones. The SIM card usually contains an array of terminals for connection to an external card reader system. The SIM card connector typically includes a card slot and an electrical contact terminal disposed within the card slot. The SIM card can be removed from the card slot or inserted into the card slot. When the SIM card is inserted into the SIM card connector, the SIM card connector terminal abuts the terminal array of the SIM card, thereby achieving electrical conduction therebetween. # In order to prevent the SIM card from being inserted into the SIM card connector incorrectly, the conventional SIM card connection usually has a foolproof structure. Referring to the thirteenth figure, a conventional SIM card connector 300 having a foolproof mechanism includes an insulating seat body and a foolproof block formed by a side wall of the insulating seat body and a front end wall thereof. When the external SIM card 200 After the insulating seat is properly inserted, the missing foot on the side of the siM card 200 can just abut against the anti-slope block on the insulating base, thereby forming a foolproof effect. However, the above-mentioned SIM card connector, if the SIM card is inserted backwards, although the 5 M308527 can determine that the SIM card is in the wrong insertion state, it is easy to make the sm card 20 corners: 13⁄4 the diagonal block collides. Therefore, the sim card is damaged. And because it is judged by people, it is inevitable that an inaccurate judgment will occur. [New Content] The purpose of this creation is to provide a card connector with a foolproof structure, which can prevent the SIM card from being damaged and can be broken and the card is mis-plugged. The SIM card connector comprises: an insulating chain, wherein the insulating seat is provided with a plurality of terminals for arranging the valley and the second receiving channel; the plurality of signal terminals are received in the terminal slot; and the switch terminal comprises a division And a fixed terminal and a movable terminal, wherein the fixed terminal includes a first holding portion and a first welding portion connected to the first holding portion, the movable terminal includes a second holding a resilient arm extending from the second retaining portion and a second soldering portion and a crimping portion connected to the end of the resilient arm, the resilient arm having an abutting portion at the top, the abutting portion extending upwardly from the insulating seat The crimping portion abuts against the fixed terminal; when the SIM card is correctly inserted, the SIM card presses the abutting portion of the movable terminal downward to drive the crimping portion downward to be separated from the fixed terminal; When the card is stuck, the SIM card does not come into contact with the abutting portion of the movable terminal. As described above, the SIM card connector with the foolproof structure of the present invention determines whether the SIM card is mis-inserted by generating an electrical signal through an electrical connection between the added switch terminal and the external circuit board, thereby preventing the SIM card from colliding. And suffered damage, and can accurately determine whether the SIM card is mis-inserted, and thus achieve the effect of 6 M308527. [Embodiment] In order to explain in detail the technical valleys, structural features, achieved goals and effects of the present invention, the embodiments are described in detail below with reference to the drawings. Please refer to the brother's picture. The SIM card connection p 100 of the present invention has a foolproof structure. The insulating base 10 is fastened with a cover 20, and the insulating base 10 houses a plurality of signal terminals 30 and A pair of switch terminals 40 for foolproof. The switch terminal 40 includes a fixed terminal 5 〇 and a movable terminal 60 that cooperates with the fixed terminal 50 . Referring to the second figure, the insulating base 10 includes a substrate 11. The front and rear ends of the substrate are provided with a plurality of terminal slots 12 arranged in a matrix. The terminal slots 12 extend up and down through the substrate 11 and extend longitudinally to communicate with the outside. The side edges of the substrate η extend upwardly from the longitudinally extending side walls 13, respectively, and the front end edge of the substrate 11 extends upward to form a wall 14 slightly above the side wall 13. The retaining wall 14 and the base plate 11 have a front end surface 15 'the front end surface 15 - a switch terminal receiving passage 16 is provided on the side. Referring to the third, fourth and ninth views, the switch terminal receiving passage 16 includes the first The channel 17 is accommodated and the second receiving channel 18 is located below the first receiving channel 17. The first accommodating passage π includes a first horizontal groove 171, and a vertical groove 172 formed by extending vertically downward from the first horizontal groove 171. Wherein, the first horizontal groove m passes backwards through the wall U, and the bottom portion thereof is formed on the upper surface of the substrate u. The vertical slot 172 extends downwardly at the bottom end to extend horizontally through the bottom portion 14 to form a slot 7 172 ' 173 ' vertical slot 172 and is recessed rearwardly in the substantially central portion to form a slotted slot i74. The second accommodating passage 18 includes a second horizontal groove 181 located below the first horizontal groove 171 and parallel to the first water supply. The second horizontal groove (8) extends rearward to the inside of the substrate, the second horizontal groove 181 Extending substantially in the middle portion to communicate with the first horizontal groove πι substantially centrally to form a communication groove 182 extending upwardly above the first horizontal groove (7) and extending rearward to a point in front of the second horizontal groove 181 The outside of the substrate η is connected to the outside. The front end of the second horizontal groove 181 extends horizontally outward from the side of the first straight groove 172, and then extends straight through the substrate u at the end, and then extends toward the bottom end to form a substantially rectilinear shape. 183. Referring to the fifth figure, the fixed terminal 50 has a first holding portion 51 including a horizontal portion 52 in the shape of a laterally inclined plate and a vertical portion extending vertically downward from the horizontal portion 52. Straight 53. The horizontal portion 52 projects slightly downward from the middle portion of the rear side by a pressing block 54. The straight portion 53 is horizontally folded at the bottom end to form a first welded portion %, and the straight portion 4 53 is formed at a middle portion of the rear side to form a plug portion %, and the plug portion is convexly protruded from the upper and lower sides respectively. 57. The :n @ ' movable terminal 6G has a rectangular ring extending substantially in the longitudinal direction, the spoon first holding and the second holding portion including the front end portion w, the rear end portion 62, and (four) the side end portions 63 on both sides. The front end of the front end portion 62 is connected with a resilient arm above the second retaining portion, and the elastic arm includes a connecting arm 64 formed by the rear end portion 62 extending obliquely upward from the middle of the end portion, and extending upwardly from the end of the connecting arm 64 The arcuate arm 65, which is formed by bending downward, is formed, and M308527 forms an abutment M6 at the point of the curved end of the arcuate arm 65. The end of the arcuate crucible 65 extends horizontally to form a crimping portion 67. In addition, one of the end portions is horizontally outwardly extended at the front end and then bent downward to form a bent portion 68. The bent portion 68 includes a first bent portion 68 and is ended by the first bent portion 681. The lower protruding vertical wall 682 and the second illusion extending from the bottom end of the straight wall 682 extend inwardly, and the end of the second bent portion 683 is inwardly horizontally extended. Please refer to the seventh figure to the card connector i 0 0 group map 'This creation has a sigma structure s I μ, ^ know the details as follows: As shown in the younger figure, the signal is set in the terminal slot 12 . When the contact portion 31 of the substrate 唬 terminal 30 of the insulating base 10 is exposed on the insulating base 10, the contact with the SIM card 200 is reached, and the external SIM card 200 is inserted. Electrical connection. The month and the month combine the eighth and ninth. The movable terminal 60 and the movable terminal 60 respectively receive the map, and the fixed terminal 50 of the switch terminal 4 is connected to the first receiving passage 52 and the crimping block 54 of the second insulating passage. Wherein, on the horizontal side of the fixed terminal 50, the crimping block 54 extends downwardly, and the horizontal groove Π1 is accommodated in the vertical groove 172, and is inserted into the communication groove 182. The vertical portion 53 is received in the yoke 4 (as shown in the fourth figure). The 56 is inserted into the insertion slot by the spur V to the socket body 1 and is too connected to the rib 17 3 to be exposed. . The first bottom surface of the movable terminal 60 is welded to the outer circuit board at the edge of the horizontal groove 181, and is bent and held. The second portion 468 of the insulating base 10 and the second soldering portion 69 are received in the engaging 9 M308527 slot 183, wherein the second soldering portion 69 is exposed on the bottom surface of the substrate 11 of the insulating base 10 so as to be external to the circuit board. Welding is performed. The connecting arm 64 on the rear end portion 62 of the movable terminal 60 is located at the communication groove 182. The abutting portion 66 at the apex of the curved arm 65 projects out of the communication groove 182 and is substantially at the same level as the contact portion 31 of the signal terminal 30. The crimping portion 67 of the movable terminal 60 is located at the communication groove 182 and abuts against the bottom of the crimping block 54 of the fixed terminal 50. For the present invention, the crimping block 54 and the non-essential component, the crimping portion 67 of the movable terminal 60 can also abut against the bottom of the horizontal portion 52 of the first retaining portion 51 of the fixed terminal 50 as long as the movable terminal 60 and It is sufficient that the fixed terminal 50 achieves the effect of contact. Referring to the tenth figure, the cover 20 has a side plate 21 extending downward from both sides, and the side plate 21 is engaged with the outside of the side wall 13 of the insulating base 10. A receiving space 120 is formed between the cover 20 and the insulating base 10 for receiving the external SIM card 200. Continuation, please refer to the eighth and ninth diagrams. Before the SIM card connector 100 with the foolproof structure is used, the crimping block 54 of the fixed terminal 50 is pressed against the crimping portion 67 of the movable terminal 60, and is fixed. The first soldering portion 55 of the terminal 50 and the second soldering portion 67 of the movable terminal 60 are both soldered to the external circuit board such that the fixed terminal 50 and the movable terminal 60 and the external circuit board together form an electrical circuit. Referring to the eleventh and twelfth drawings, the SIM card connector 100 having the foolproof structure is formed when the external SIM card 200 is correctly inserted into the M308527 edge seat body 10 and the cover plate 20 is engaged. When the accommodating space 120 is received, the abutting portion 66 at the apex of the arcuate arm 65 of the movable terminal 60 contacts the SIM card 200, and the SIM card 200 presses the abutting portion 66 to push the crimping portion of the movable terminal 60 downward. 67 is disengaged from the crimp block 54 of the fixed terminal 50, thereby generating an electrical signal to determine that the SIM card 200 has been properly inserted. When the SIM card 200 is inserted in the reverse direction, since the notch of the SIM card 200 cannot be pressed against the abutting portion 66 of the movable terminal 60, the crimping portion 67 of the movable terminal 60 and the crimping block 54 of the fixed terminal 50 cannot be separated from each other. Therefore, an electric signal cannot be generated, so it can be judged that the SIM card 200 is in an erroneous insertion state. In summary, the SIM card connector 100 with the foolproof structure of the present invention generates an electrical signal by electrically connecting a pair of switch terminals 40 to an external circuit board to determine whether the SIM card is mis-inserted, thereby avoiding the SIM card. Suffering from damage due to collision, and can accurately determine whether the SIM card is mis-inserted, thereby achieving the effect of preventing staying. [Simple description of the diagram] The first figure is a perspective view of the stereoscopic SIM card connector with a foolproof structure. The second figure is a perspective view of the insulating seat of the SIM card connector with the foolproof structure. The third figure is a partial enlarged view of the accommodating channel of the SIM card connector with the foolproof structure. The fourth figure is a cross-sectional view of the first figure taken along line IV-IV. 11 M308527 The fifth figure is a three-dimensional structure diagram of the fixed terminal of the SIM card connector with the foolproof structure. The sixth figure is a three-dimensional structure diagram of the movable terminal of the SIM card connector having the foolproof structure. The seventh figure is a three-dimensional structure diagram of the letter-number terminal and the switch terminal of the SIM card connector having the foolproof structure assembled in the insulating base. The eighth figure is a partial enlarged view of the SIM card connector with the foolproof structure of the present invention when the switch terminal is assembled in the switch terminal receiving channel. The ninth drawing is a cross-sectional view of the seventh figure taken along IX-IX. The tenth figure is a stand-up assembly diagram of the SIM card connector with the foolproof structure. - The eleventh figure is a schematic diagram of the assembly of the SIM card connector with the foolproof structure and the external SIM card. Figure 12 is a cross-sectional view of the eleventh figure along X Π -X Π. • The thirteenth figure is a schematic diagram of the anti-stay structure of the conventional SIM card connector. [Main component symbol description] SIM card connector 100 Insulation base 10 Substrate 11 Terminal slot 12 Side wall 13 擂 Wall 14 End surface 15 accommodating channel 16 First accommodating channel 17 Second accommodating channel 18 Cover plate 20 12 M308527 Side plate contact part fixing terminal horizontal part. Crimp block insertion part movable terminal rear end part connection arm abutment part * Bending part ^ accommodating space vertical slot insertion slot ® communication slot SIM card vertical wall signal terminal 30 switch Terminal 40 First retaining portion 51 Vertical portion 53 First welded portion 55 Spur 57 Front end portion 61 Side end portion 63 Curved arm 65 Crimp portion 67 Second welded portion 69 First horizontal groove 171 Notch 173 Second horizontal groove 181 engaging groove 183 first bent portion 681 second bent portion 683 13