200810942 CM0083TW 21027twf.doc/g 九、發明說明： 【發明所屬之技術領域】 II於士於一種齒輪嚙合定位機構，且特別是有 種可#度良好的齒輪_合定位機構。 【先前技術】 印表機及影印機的制普及於辦公室巾。—般而t， 印表機或影印機的進紙方式，是 1 動滾筒滾動，叫㈣張進人辨區或料區; 互二車=輪喃合定位機構多是以兩個傳動模組相 衣以傳達動力，而傳動模組之_定位常常會因為尺 、差而歷法使齒輪確切地鳴合。因此，尺寸公差县二 齒輪齡定位機構之動力傳輸效率低的主要原因之―2?詳 設:傳動模組時’須要特別控制兩個傳動模 '夂且。精度，且必須將精度維持在〇.2 兩個傳動模組的奸以合+八、，，〜確S 人不*會為糾公i而能齒或是餐 計-個_此外’有時還需要在兩個傳動模組中各設 德，八：?來傳達動力，以取代兩個傳動模組在組配之 λ差太大而使齒輪無法嚙合的問題。 【發明内容】 位機才明之目的是提供—種可靠度良好的齒輪喝合定 位機:達是其他目的’本發明提出-種齒輪喷合定 括一第―傳^心在—裝置中。此齒輪嚙合定位機構包 專動模組以及-第二傳動模組。第一傳動模組配 6 200810942 cmuu«3TW 21027twf.doc/g 設於裝置之一平台，且第一傳動模組包括一第一固定座、 一第一擺臂以及一第一齒輪組。第一固定座配置於平台 上。第一擺臂藉由一樞桿樞設於第一固定座，而第一齒輪 組樞設於第一擺臂。第二傳動模組適於組裝至第一傳動模 組，此第二傳動模組包括一第二固定座、一第二齒輪組、 一第二擺臂以及一彈性件。第二齒輪組樞設於第二固定 座，其中第二齒輪組適於與第一齒輪组嚅合。第二擺臂樞 = 固定座，且第二擺臂具有一樞接端、一凹槽以及 端，其中凹槽位於樞接端與導引端之間。彈性件配 : ΐ雜件之一端位於凹槽内。當施力移動第 -擺臂以樞桿為軸心旋轉至一植f位置，以= 組組裝至第-傳動模、=至、、且衣位1 U使弟—傳動模 第-明之—實施例中，上述之第—固^座更包括-〇構，位於第—擺臂之旋轉路徑上。 -固實施例中，上述之第-限位結構蝴 施例中’上述之第-限位結構為凸塊。 導引面以及—第1=例中，上述之第—擺臂具有一第-面，且第一導弓C ’而第一接觸面鄰接第-導引 在本發接觸面適於與第二擺臂接觸。 引面以及—第=例中楚上述之導引端具有—第二導 且弟一導弓丨面適於接觸第—導引面，第二接觸面適於接觸 7 200810942 CM0083TW 21027twf. doc/g 第一接觸面。 在本發明之一實施例中，上述之導引端具有一第二導 引面以及一第二接觸面，而第二導引面鄰接第二接觸面， 且弟^一導引面及弟一接觸面適於接觸第一擺臂。 在本發明之一實施例中，上述之第一齒輪組包括一第 一齒輪以及一第二齒輪，第一齒輪藉由枢桿樞設於第一擺 臂，而第二齒輪樞設於第一擺臂並鄰近第一齒輪。 在本發明之一實施例中，上述之第二固定座更包括一 i 鄰近第二擺臂之第二限位結構。 在本發明之一實施例中，上述之第二限位結構與第二 固定座一體成型。 在本發明之一實施例中，上述之第二限位結構為凸塊。 在本發明之一實施例中，上述之第二齒輪組為一第三 齒輪，且第三齒輪樞設於第二固定座，而第三齒輪適於與 笫^一齒輪ϋ齧合。 在本發明之一實施例中，上述之彈性件包括扭簧。 _ 本發明之齒輪嚙合定位機構利用第一擺臂及彈性件消 弭第一傳動模組與第二傳動模組組裝時的誤差，使齒輪之 間可以確切的鳴合。因此，齒輪σ齒合定位機構的作動平順， 且動力傳輸效率優良，品質穩定且可靠度高。 ▲為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂’下文特舉-實施例，並配合所附圖式，作詳細說明 如下。 【實施方式】 8 200810942 CM0083TW 21027twfdoc/g 备 圖1為本發明-種齒輪喷合定位機構，其第二傳動模 組尚未組裝至第-傳動模組的示意圖。請參考圖i，本發 明之齒輪嚙合定位機構100適於固設於一裝置的一平台 200上。在本實施例中，裝置可以是印表機、影印機或其 他較大型的裝置，而齒輪嚙合定位機構1〇〇例如是用以帶 動紙張或其他物品進入裝置中，或是將紙張或其他物品由 裝置中輸出。齒輪嚙合定位機構1〇〇包括一第一傳動模組 110以及一第二傳動模組120,其中第二傳動模組120適於 組裝至第一傳動模組110，以達到傳輸動力的需求。 承上述，第一傳動模組110包括一第一固定座112、 一樞桿114、一第一擺臂110以及齒輪組118，其中第一固 定座112固設於平台200。擺臂116藉由枢桿ι14樞設於 固定座112，因此擺臂116可以以樞桿114為轴心相對第 一固定座112轉動。此外，擺臂116更具有一第一導引面 116a，且第二傳動模組120適於藉由第一導引面u6a的導 引，以組裝至第一傳動模組110。 _ 齒輪組118樞設於擺臂116，其中齒輪組118包括一 第一齒輪118a以及一第二齒輪118b，且第一齒輪118a亦 是藉由枢桿114以樞設於擺臂116，而第二齒輪118b樞設 於擺臂116並鄰近第一齒輪118a。 此外，第一固定座112更具有一第一限位結構112a， 且第一限位結構112a為凸出於第一固定座112之表面的凸 塊，並位於擺臂116的轉動路徑上，以限制擺臂116的旋 轉角度及路徑。在本實施例中，第一限位結構112a可以是 200810942 CM0083TW 21027twf.doc/g 與第一固定座112 —體成型，或是另外以黏附、鑲嵌等方 式配置於第一固定座112。當第二傳動模組12〇尚未組裝 至第一傳動模組110時，擺臂116接觸第一限位結構 112a ’並位於^一原始位置。 請繼續參考圖1，第二傳動模組120適於組裝至第一 傳動模組110,其包括一第二固定座122、一第二齒輪組 124、一第二擺臂126以及一彈性件128。第二齒輪組 樞設於底座122，而本實施例之第二齒輪組124為一第三 齒輪。當然，在其他實施例中，第二齒輪組124可以是: 多個齒輪組合而成。 此外，第二擺臂126樞設於第二固定座丨22，其具有 一樞接端126a、一凹槽126b以及一導引端126c，其中樞 接端126a穿設第二固定座122，因此第二擺臂126可以其 樞接端126為軸心相對第二固定座122旋轉。凹槽12讣 ，於樞接端126a與導引端126c之間。導引端ΐ2&具有— 第二導引面126c，以及一第二接觸面126c，，，其中第二導引 面126c，適於接觸並推移第一導引面U6a，使第一擺臂ii6 ^轉至-組，位置，然後第二接觸面126e，，會接觸第—擺 116的一第一接觸面U6b，以使第二傳動模組12〇組 至第一傳動模組110。 t 另外，彈性件128配設於樞接端126a，且彈性件128 的蛐128&位於凹槽126b中。本實施例之彈性件128為 :扭黃m艮制第二擺臂126白後轉角度，因此第二固 疋座122更具有一第二限位結構122a，且在第二擺臂126 200810942 CM0083TW 21027twfdoc/g 受力旋轉後，彈性件】Μ 122a > i 、知128b會接觸第二限位結構 圖限制第二擺臂126繼續旋轉。 立回/回.之第—傳動模組組裝至第一傳動模組的二 思圖。睛同時茶考圖J及 僅知、不 120组,m—, 用者將弟—傳動模組 、、’衣至弟傳動核組11〇時，使用者使 動杈組120，使第-值叙伊4 Λ 夕吊—傳 於χ方向持續移動。 田弟一 V引面126c，接觸第一導引面U6a時， 動模組120的持續移動使第二導引面mc，擠壓第 面肠’此時彈性件128使第二擺臂126對第—擺臂、116 在Υ方向施一壓力’並藉由第二導引面126c，以及第一導 引面116a的相互導引，第一擺臂116以樞桿114為轴心旋 轉至組裝位置’而第二擺臂126以其_端丨施為轴心旋 轉。此時’藉由彈性件128’第二擺们26與限位結構咖 之間的角度變小，例如由43度變為36度，以限制 臂126的轉動。200810942 CM0083TW 21027twf.doc/g Nine, the invention description: [Technical field of the invention] II Yushi is a gear meshing positioning mechanism, and particularly has a good gear-to-close positioning mechanism. [Prior Art] The system of printers and photocopiers is popular in office towels. Generally, t, the printing method of the printer or photocopier is 1 moving roller rolling, called (4) Zhangjin people discriminating area or material area; mutual two cars = wheel merging positioning mechanism is mostly two transmission module clothing In order to convey the power, the positioning of the transmission module often makes the gears exactly commemorate due to the ruler and the difference. Therefore, the main reason for the low power transmission efficiency of the two-gear-age positioning mechanism of the size tolerance is “2”. When the transmission module is used, it is necessary to specially control the two transmission modes. Accuracy, and must maintain the accuracy of 〇.2 two transmission modules of traits + eight,,, ~ indeed S people not * will be correcting i and can be teeth or meals - a _ other 'sometimes It is also necessary to set the power in each of the two transmission modules, eight: to convey the power, in order to replace the problem that the two transmission modules are too large in the assembly to make the gears unable to mesh. SUMMARY OF THE INVENTION The purpose of the machine is to provide a gear-stationing machine with good reliability: for other purposes, the invention proposes that the gear-spraying method comprises a first-passing-in-device. The gear meshing positioning mechanism includes a special motion module and a second transmission module. The first transmission module is provided with a platform of one of the devices, and the first transmission module includes a first fixing seat, a first swing arm and a first gear set. The first mount is disposed on the platform. The first swing arm is pivotally disposed on the first fixed seat by a pivot, and the first gear set is pivotally disposed on the first swing arm. The second transmission module is adapted to be assembled to the first transmission module, the second transmission module comprising a second fixing seat, a second gear set, a second swing arm and an elastic member. The second gear set is pivotally mounted to the second mount, wherein the second gear set is adapted to engage the first gear set. The second swing arm pivots a fixed seat, and the second swing arm has a pivot end, a groove and an end, wherein the groove is located between the pivot end and the leading end. Elastic parts: One end of the dowel is located in the groove. When the force is applied, the first swing arm is rotated from the pivot to the pivot position, and the assembly is assembled to the first transmission mode, = to, and the clothing position 1 U is used to implement the transmission mode. In the example, the first solid seat further includes a 〇 structure, which is located on the rotation path of the first swing arm. In the solid embodiment, in the above-described first-limit structure, the above-mentioned first-limit structure is a bump. In the guide surface and in the first embodiment, the first arm has a first face, and the first guide C' and the first contact abuts the first guide at the present contact surface and the second Swing arm contact. The lead surface and the first guide case have a second guide and the second guide is adapted to contact the first guide surface, and the second contact surface is adapted to contact 7 200810942 CM0083TW 21027twf. doc/g First contact surface. In an embodiment of the invention, the guiding end has a second guiding surface and a second contact surface, and the second guiding surface is adjacent to the second contact surface, and the guiding surface and the first one are The contact surface is adapted to contact the first swing arm. In an embodiment of the invention, the first gear set includes a first gear and a second gear, the first gear is pivoted to the first swing arm by the pivot rod, and the second gear is pivoted to the first The arm is placed adjacent to the first gear. In an embodiment of the invention, the second fixing base further includes a second limiting structure adjacent to the second swing arm. In an embodiment of the invention, the second limiting structure is integrally formed with the second fixing base. In an embodiment of the invention, the second limiting structure is a bump. In an embodiment of the invention, the second gear set is a third gear, and the third gear is pivotally disposed on the second fixed seat, and the third gear is adapted to mesh with the gear. In an embodiment of the invention, the elastic member comprises a torsion spring. The gear meshing and positioning mechanism of the present invention utilizes the first swing arm and the elastic member to eliminate the error in assembling the first transmission module and the second transmission module, so that the gears can be exactly combined. Therefore, the gear σ tooth positioning mechanism has smooth operation, excellent power transmission efficiency, stable quality and high reliability. The above and other objects, features, and advantages of the present invention will become more apparent <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; [Embodiment] 8 200810942 CM0083TW 21027twfdoc/g FIG. 1 is a schematic view of a gear-spraying positioning mechanism of the present invention, in which the second transmission module has not been assembled to the first transmission module. Referring to Figure i, the gear meshing positioning mechanism 100 of the present invention is adapted to be secured to a platform 200 of a device. In this embodiment, the device may be a printer, a photocopier or other larger device, and the gear meshing and positioning mechanism 1 is for example used to drive paper or other articles into the device, or to paper or other articles. Output from the device. The gear meshing positioning mechanism 1 includes a first transmission module 110 and a second transmission module 120, wherein the second transmission module 120 is adapted to be assembled to the first transmission module 110 to achieve the requirement of transmitting power. In the above, the first transmission module 110 includes a first fixing base 112, a pivot rod 114, a first swing arm 110, and a gear set 118, wherein the first fixing base 112 is fixed to the platform 200. The swing arm 116 is pivoted to the fixed seat 112 by the pivot rod ι14, so that the swing arm 116 can be pivoted relative to the first fixed seat 112 with the pivot 114 as an axis. In addition, the swing arm 116 further has a first guiding surface 116a, and the second transmission module 120 is adapted to be assembled to the first transmission module 110 by the guiding of the first guiding surface u6a. The gear set 118 is pivotally disposed on the swing arm 116, wherein the gear set 118 includes a first gear 118a and a second gear 118b, and the first gear 118a is also pivoted to the swing arm 116 by the pivot 114. The two gears 118b are pivotally disposed on the swing arm 116 and adjacent to the first gear 118a. In addition, the first fixing base 112 further has a first limiting structure 112a, and the first limiting structure 112a is a protrusion protruding from the surface of the first fixing seat 112, and is located on the rotating path of the swing arm 116, The angle of rotation and path of the swing arm 116 are limited. In this embodiment, the first limiting structure 112a may be integrally formed with the first fixing base 112, or may be additionally attached to the first fixing base 112 by adhesion, inlay or the like in 200810942 CM0083TW 21027twf.doc/g. When the second transmission module 12 is not assembled to the first transmission module 110, the swing arm 116 contacts the first limiting structure 112a' and is located at the original position. With reference to FIG. 1 , the second transmission module 120 is adapted to be assembled to the first transmission module 110 , and includes a second fixing base 122 , a second gear set 124 , a second swing arm 126 , and an elastic member 128 . . The second gear set is pivotally mounted to the base 122, and the second gear set 124 of the present embodiment is a third gear. Of course, in other embodiments, the second gear set 124 can be: a plurality of gears combined. In addition, the second swing arm 126 is disposed on the second fixing base 22, and has a pivot end 126a, a recess 126b, and a guiding end 126c. The pivot end 126a is disposed through the second fixing seat 122. The second swing arm 126 can rotate relative to the second mount 122 with its pivot end 126 as its axis. The groove 12 is between the pivot end 126a and the guiding end 126c. The guiding end ΐ2& has a second guiding surface 126c, and a second contact surface 126c, wherein the second guiding surface 126c is adapted to contact and push the first guiding surface U6a such that the first swing arm ii6 ^ Turning to the group, the position, and then the second contact surface 126e, will contact a first contact surface U6b of the first-pendulum 116 to group the second transmission module 12 to the first transmission module 110. In addition, the elastic member 128 is disposed at the pivot end 126a, and the 蛐 128 & of the elastic member 128 is located in the recess 126b. The elastic member 128 of the embodiment is: the second swing arm 126 is turned to the rear angle of the second swing arm 126, so the second solid seat 122 has a second limit structure 122a, and the second swing arm 126 200810942 CM0083TW 21027twfddoc/g After the force is rotated, the elastic member Μ 122a > i , the known 128b will contact the second limit structure diagram to limit the second swing arm 126 to continue to rotate. Stand back/return. The second part of the drive module assembled to the first drive module. At the same time, the tea test map J and only know, not 120 groups, m-, the user will be the brother-drive module, the 'clothing to the brother drive nuclear group 11 ,, the user makes the 杈 group 120, the first value Sui Yi 4 Λ 夕 吊 — Passing in the direction of the 持续 keep moving. When the Tiandi V-face 126c contacts the first guiding surface U6a, the continuous movement of the movable module 120 causes the second guiding surface mc to press the first intestine 'At this time, the elastic member 128 makes the second swing arm 126 The first swing arm 116 rotates to the assembly with the pivot 114 as an axis by the first swing arm 116 pivoting to the assembly by the second guide surface 126c and the first guide surface 116a. The position 'the second swing arm 126 rotates with its _ end effect as the axis. At this time, the angle between the second pendulum 26 and the stopper structure by the elastic member 128' becomes smaller, for example, from 43 degrees to 36 degrees to restrict the rotation of the arm 126.
然後，第一齒輪118b與第二齒輪組124喃合，且第二 接觸面126c”接觸第一接觸面116b，第二傳動模組12〇组 裝至第一傳動模組11()。 值得注意的是，當第二傳動模組12〇組裝至第一傳動 模組110時，本發明之齒輪嚙合定位機構100是藉由可以 轉動的第一擺臂116以及彈性件128造成的彈力來控制第 一接觸面116b與第二接觸面126c”的接觸位置，進而消弓耳 第一傳動模組110與第二傳動模組120組裝時丫方向的誤 差。因此，在第二傳動模組120組裝至第一傳動模組11〇 11 200810942 CM0083TW 21027twf.doc/g ，輪'誕124的第三齒輪可以破切 後，第二齒輪118與第 的ϋ齒合^。 此外，為了要確切地定位第二去 124之第三齒輪的相對位置，我々U8b與第二齒輪組 臂116的頂® 116c與第二固定座9可以藉由控制第—擺 公差，以確保第二齒輪118b與第二底面122b的形狀 的嚙合位置’如圖3示。與習知相二H24之第三齒輪 定位機構100的組裝容許公差較Α 5明之齒輪嗜合 影響第-動模組no與第二傳動誤差不會 用輕，動模組120從第-傳動模組 no拆卸下來時，第二齒輪118b與第 ;輪可以平順地分離。此時，第1臂U6會因為::： 而自動恢復至原始位置，而第二擺臂126财 性件128的彈力而恢復至原位。 德⑽第一擺臂116恢復至原始位置後，當我們再次將第二 傳動模組120組裝至第一傳動模組11〇時，便可以避免第 一，臂116位於組裝位置而使第二齒輪組124之第三齒輪 和第二齒輪118b發生干涉碰撞，因此可以避免 = 110或第二傳純組12()觀，延長齒細合定位構 100的使用壽命。 # 特別的是’因為第二齒輪118b與第二齒輪組124之第 =可以確切地嚙合，因此齒輪嚙合定位機構刚的作 ’且動力傳輸效率較f知佳。因此，本發明之齒 輪嚙5疋位機構100的品質穩定，且可靠度高。 12 200810942 cmuu«3TW 21027twf.doc/g 之優點 =上所述’本發明之齒輪嘴合定位機構至少 具有下列 一、利用可旋轉的第一擺臂及 動模組與第二傳動模組組裝時；^件;^力消㈣—傳 可以確切的嚙合。 方向的决差，使齒輪之間 兀件的誤差不易影響值口此組裝谷許公差較大， 與動力傳輸。 θ 、動模組與第二傳動模組的組裝 二、第一傳動模紐虚 •損壞’因此齒輪:-合傳定生干涉 四、齒輪嘴合定 ⑽的使用寿命長。 良，品質穩定且可靠度高。乍動平順，且動力傳輸效率優 雖然本發明已以— 定本發明，任何所屬、也'U路0上，然其並非用以限 離本發明之精神::::領域中具有通常知識者，在4 準。〜當視後附之申請專利^者： 【圖式簡單說明】 ' 意圖 組尚未組ίΐ匕;:齒輪°:合，位機構’其第二傳動 圖2為圖動:組的示意圖。 " 。 弟一傳動模組組裝至第1動模組的示 圖3是圖2 >楚 擺臂與第二固定座接觸的示意 圖 13 200810942 ^muu$ JT W 21027twf.doc/g 【主要元件符號說明】 100 :齒輪嗜合定位機構 110 :第一傳動模組 112 ··第一固定座 112a :第一限位機構 114 :枢桿 116 :第一擺臂 116a :第一導引面 116b :第一接觸面 116c :頂面 118 :第一齒輪組 118a :第一齒輪 118b :第二齒輪 120 :第二傳動模組 122 :第二固定座 122a :第二限位結構 122b :底面 124 :第二齒輪組 126 :第二擺臂 126a :樞接端 126b :凹槽 126c :導引端 126c’ ：第二導引面 126c” ··第二接觸面 14 200810942 UMUUXiTW 21027twf.doc/g 128 :彈性件 128a、128b : —端 200 :平台Then, the first gear 118b is squashed with the second gear set 124, and the second contact surface 126c" contacts the first contact surface 116b, and the second transmission module 12" is assembled to the first transmission module 11(). When the second transmission module 12 is assembled to the first transmission module 110, the gear meshing and positioning mechanism 100 of the present invention is controlled by the elastic force of the first swing arm 116 and the elastic member 128 that can be rotated. The contact position of the contact surface 116b with the second contact surface 126c", thereby eliminating the error of the 丫 direction when the first transmission module 110 and the second transmission module 120 are assembled. Therefore, after the second transmission module 120 is assembled to the first transmission module 11〇11 200810942 CM0083TW 21027twf.doc/g, the third gear of the wheel 124 can be broken, and the second gear 118 is combined with the first gear. ^. In addition, in order to accurately position the relative position of the third gear of the second leg 124, the tops 116c and the second mount 9 of the U8b and the second gear set arm 116 can be controlled by the first-to-swing tolerance to ensure the The meshing position ' of the shape of the second gear 118b and the second bottom surface 122b is as shown in FIG. The assembly tolerance tolerance of the third gear positioning mechanism 100 of the H24 is different from that of the fifth gear. The first motion module no and the second transmission error are not light, and the dynamic module 120 is driven from the first transmission mode. When the group no is disassembled, the second gear 118b and the second wheel can be smoothly separated. At this time, the first arm U6 automatically returns to the original position because of :::, and the elastic force of the second swing arm 126 financial member 128 returns to the original position. After the first swing arm 116 is restored to the original position, when we assemble the second transmission module 120 to the first transmission module 11〇 again, the first arm can be avoided, the arm 116 is located at the assembly position, and the second gear is The third gear of the group 124 and the second gear 118b have an interference collision, so that the =110 or the second pure group 12 can be avoided, and the service life of the tooth fine positioning mechanism 100 can be extended. # Specially, because the second gear 118b and the second gear set 124 can be exactly engaged, the gear meshing positioning mechanism is just the same and the power transmission efficiency is better than f. Therefore, the tooth-clamping mechanism 5 of the present invention is stable in quality and high in reliability. 12 200810942 Advantages of cmuu «3TW 21027twf.doc/g=The above description The gear-and-nozzle positioning mechanism of the present invention has at least one of the following: when the first swing arm and the movable module are assembled with the second transmission module by using the rotatable first swing arm and the movable module ;^件; ^力消(四)-pass can be exactly engaged. The direction of the difference, so that the error between the gears is not easy to affect the value of the mouth of this assembly, the tolerance is greater, and power transmission. θ, assembly of the moving module and the second transmission module 2. The first transmission mold is imaginary • Damaged. Therefore, the gear: - the combined transmission and the constant interference. 4. The gear nozzle is fixed (10) has a long service life. Good, stable quality and high reliability.乍 平 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , At 4 quasi. ~ Applicant's patent application ^: [Simple description of the diagram] 'Intent group has not been grouped together;: Gear °: joint, position mechanism' its second transmission Figure 2 is a schematic diagram of the group: group. " . FIG. 3 is a schematic view of the second transmission module assembled to the first movable module. FIG. 2 is a schematic diagram of the contact between the second swinging arm and the second fixed seat. 200810942 ^muu$ JT W 21027twf.doc/g [Description of main component symbols] 100: gear adaptive positioning mechanism 110: first transmission module 112 · first fixing seat 112a: first limiting mechanism 114: pivot 116: first swing arm 116a: first guiding surface 116b: first contact Face 116c: top surface 118: first gear set 118a: first gear 118b: second gear 120: second drive module 122: second mount 122a: second limit structure 122b: bottom surface 124: second gear set 126: second swing arm 126a: pivot end 126b: groove 126c: guide end 126c': second guide surface 126c" · second contact surface 14 200810942 UMUUXiTW 21027twf.doc / g 128: elastic member 128a, 128b : - End 200 : Platform
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