1304021 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種饋紙機構，特別係有關於一種可 防止多張進紙（Multi-Feed)之饋紙機構。 【先前技術】 首先請參閱第1圖，習知饋紙機構10主要係由一置紙 槽12、一分紙器14、一轉軸16、一取紙臂18以及一設置 | 於取紙臂18末端之取紙滾輪19所組成。如圖所示，前述 轉軸16兩端係固定於置紙槽12兩側，取紙臂18則與轉軸 16樞接，此外分紙器14係固定於置紙槽12底部。 一般而言，當置紙槽12内之紙張厚度改變時，前述取 紙臂18係可繞轉軸16旋轉，使得取紙滾輪19可持續地壓 合於紙張之上表面，藉以帶動紙張前進。特別地是，當取 紙滾輪19帶動紙張前進時，紙張下緣係受到分紙器14的 阻擋而產生折曲（buckling )，因此可達到單張進紙的目的。 • 然而，有鑑於分紙器14與紙張間之夾角通常為鈍角，因此 在放置紙張時可能由於力量過大而使紙張越過分紙器 14，進而產生多張進紙（Multi-Feed)的現象。 【發明内容】 本發明提供一種饋紙機構，適用於一事務機，其主要 包括一殼體、一擋止件、一搖臂齒輪機構以及一轉動件。 上述殼體具有一置紙槽，用以容置至少一可記錄媒體。上 0535-A21232TWF(N2) ；A04473；TKLIN 6 1304021 述擋止件樞設於殼體上，其中擋止件係相對於前述可記錄 媒體於一第一角度以及一第二角度之間運動。上述搖臂齒 輪機構活動地樞設於殼體，具有一主動齒輪、一第一齒輪 列以及一第二齒輪列，其中第一、第二齒輪列分別位於主 動齒輪之相反侧並且與主動齒輪嚙合。前述轉動件枢設於 殼體上，具有一凸輪以及一缺齒齒輪，上述缺齒齒輪與凸 輪固接，且凸輪與擂止件相接觸。特別地是，當搖臂齒輪 機構位於一第一位置時，第一齒輪列與缺齒齒輪嚙合以驅 使凸輪朝一第一方向旋轉，進而帶動擋止件旋轉至前述第 一角度；當搖臂齒輪機構位於一第二位置時，第二齒輪列 與缺齒齒輪喃合以驅使凸輪朝前述第一方向旋轉，進而帶 動擋止件旋轉至前述第二角度。 於一較佳實施例中，前述缺齒齒輪具有一缺齒部，當 搖臂齒輪機構位於第一位置且第一齒輪列運動至上述缺齒 部時，搖臂齒輪機構脫離轉動件，使得擋止件維持於第一 角度。 於一較佳實施例中，當前述搖臂齒輪機構位於第二位 置且第二齒輪列運動至缺齒部時，搖臂齒輪機構脫離轉動 件，使得擂止件維持於第二角度。 於一較佳實施例中，前述擂止件具有一樞轴以及一檔 止部，其中枢轴樞接殼體，擋止部與凸輪相接觸。 於一較佳實施例中，前述擋止部具有一凸塊，上述凸 塊係與凸輪相接觸。 於一較佳實施例中，前述凸塊係為一彈性構件。 0535-A21232TWF(N2)；A04473；TKLIN 7 1304021 於一較佳實施例中，前述饋紙機構更包括一取紙滚 輪，上述取紙滾輪連接殼體，當擋止件位於前述第二角度 時，取紙滾輪驅動前述可記錄媒體朝一饋紙方向前進。 於一較佳實施例中，當前述擋止件旋轉至第一角度 時，擋止件阻檔可記錄媒體朝前述饋紙方向運動。 於一較佳實施例中，前述第二角度係大於第一角度。 於一較佳實施例中，前述第一齒輪列具有奇數個第一 齒輪，且第二齒輪列具有偶數個第二齒輪。 丨於一較佳實施例中，前述搖臂齒輪機構更包括一搖 臂，前述主動齒輪與第一、第二齒輪列皆設置於搖臂上。 於一較佳實施例中，前述搖臂齒輪機構係藉由主動齒 輪帶動而於第一、第二位置之間切換。 於一較佳實施例中，前述缺齒齒輪與凸輪係為一體成 形0 【實施方式】 ⑩ 請參閱第2圖，該圖係表示本發明之饋紙機構示意 圖。上述饋紙機構可設置於一事務機或列印裝置中，其主 要包括一殼體Η、一擂止件51、一轉動件61、一搖臂齒輪 機構71以及一取紙滾輪（未圖示）。如第2圖所示，前述殼 體Η中央設有一置紙槽41用以放置一紙堆S或其他可記 錄媒體，透過取紙滾輪（例如第1圖所示之取紙滾輪19)可 帶動紙堆S最上層之一紙張S1朝饋紙方向Α前進（如箭頭 方向所示），以完成饋紙之動作◦特別地是，於本實施例中1304021 IX. Description of the Invention: [Technical Field] The present invention relates to a paper feeding mechanism, and more particularly to a paper feeding mechanism capable of preventing multi-feed. [Prior Art] Referring first to Figure 1, the conventional paper feeding mechanism 10 is mainly composed of a paper feed slot 12, a paper separator 14, a rotary shaft 16, a pickup arm 18, and a setting | at the end of the pickup arm 18. The paper take-up roller 19 is composed of. As shown in the figure, the two ends of the rotating shaft 16 are fixed to both sides of the paper feeding slot 12, and the paper taking arm 18 is pivotally connected to the rotating shaft 16, and the paper separator 14 is fixed to the bottom of the paper loading slot 12. In general, when the thickness of the paper in the paper feed slot 12 is changed, the paper take-up arm 18 is rotatable about the rotation shaft 16, so that the paper take-up roller 19 can be continuously pressed against the upper surface of the paper to drive the paper forward. In particular, when the paper take-up roller 19 advances the paper, the lower edge of the paper is blocked by the paper separator 14 to cause buckling, so that the sheet feeding can be achieved. • However, in view of the fact that the angle between the separator 14 and the paper is usually an obtuse angle, it may cause the paper to pass over the separator 14 due to excessive force when the paper is placed, thereby generating a multi-feed phenomenon. SUMMARY OF THE INVENTION The present invention provides a paper feeding mechanism suitable for a transaction machine, which mainly comprises a casing, a stopper, a rocker gear mechanism and a rotating member. The housing has a paper slot for receiving at least one recordable medium. The upper stopper is pivotally mounted on the housing, and the stopper is moved between a first angle and a second angle with respect to the recordable medium. The rocker gear mechanism is movably pivoted to the housing, and has a driving gear, a first gear train and a second gear train, wherein the first and second gear trains are respectively located on opposite sides of the driving gear and mesh with the driving gear . The rotating member is pivotally mounted on the housing and has a cam and a missing gear. The missing gear is fixed to the cam and the cam is in contact with the stop. In particular, when the rocker gear mechanism is in a first position, the first gear train meshes with the spur gear to drive the cam to rotate in a first direction, thereby driving the stopper to rotate to the first angle; when the rocker gear When the mechanism is in a second position, the second gear train is coupled with the spur gear to drive the cam to rotate in the first direction, thereby driving the stopper to rotate to the second angle. In a preferred embodiment, the missing tooth gear has a missing tooth portion. When the rocker gear mechanism is in the first position and the first gear train moves to the missing tooth portion, the rocker gear mechanism is disengaged from the rotating member, so that the gear is blocked. The stop is maintained at the first angle. In a preferred embodiment, when the rocker gear mechanism is in the second position and the second gear train is moved to the missing tooth portion, the rocker gear mechanism is disengaged from the rotating member such that the stop member is maintained at the second angle. In a preferred embodiment, the stop member has a pivot and a stop, wherein the pivot pivots the housing and the stop contacts the cam. In a preferred embodiment, the stopper has a projection, and the projection is in contact with the cam. In a preferred embodiment, the bump is an elastic member. In a preferred embodiment, the paper feeding mechanism further includes a paper take-up roller, and the paper take-up roller is connected to the casing. When the stopper is located at the second angle, The pickup roller drives the aforementioned recordable medium toward a sheet feeding direction. In a preferred embodiment, when the stopper is rotated to the first angle, the stopper is blocked to move the recording medium toward the paper feed direction. In a preferred embodiment, the second angle is greater than the first angle. In a preferred embodiment, the first gear train has an odd number of first gears and the second gear train has an even number of second gears. In a preferred embodiment, the rocker arm gear mechanism further includes a rocker arm, and the driving gear and the first and second gear trains are disposed on the rocker arm. In a preferred embodiment, the rocker arm gear mechanism is switched between the first and second positions by the driving gear. In a preferred embodiment, the spur gear is integrally formed with the cam system. [Embodiment] 10 Referring to Fig. 2, there is shown a schematic view of the paper feeding mechanism of the present invention. The paper feeding mechanism may be disposed in a printer or a printing device, and mainly includes a casing Η, a 擂 stopper 51, a rotating member 61, a rocker gear mechanism 71, and a pickup roller (not shown). ). As shown in FIG. 2, a paper slot 41 is disposed in the center of the casing 用以 for placing a paper stack S or other recordable medium, and can be driven by a paper take-up roller (for example, the paper take-up roller 19 shown in FIG. 1). One of the uppermost layers of the stack S of sheets S1 advances toward the sheet feeding direction (as indicated by the direction of the arrow) to complete the operation of feeding the sheet, in particular, in this embodiment
0535-A21232TWF(N2)；A04473；TKLIN ⑧ *1304021 之擋止件51、轉動件61以及搖臂齒輪機構71皆樞設於殼 體Η上，且前述擋止件51可活動地改變角度用以阻擋或 導引紙張S1前進，以避免多重進紙的情況發生。 接著請參閱第3圖，前述擋止件51主要包括一樞軸 jla、—擋止部51b，其中樞軸51a與殼體Η樞接，且擋止 部51b下方設有一凸塊51c。再請參閱第4圖，前述轉動 件61主要包括一凸輪61a以及一缺齒齒輪61卜其中缺齒 齒輪61b與凸輪61 a固接，並且可一同繞轉動件^之中ς =c旋轉。特別地是，前述擋止件5ι <凸塊…則係以可 f動=式抵接凸輪61a。於一較佳實施例中，前述缺齒 1性構^ 祕且别述凸塊仏例如為 動之圖中所示之搖臂歯輪機構71主要係包括一可活 =二動齒輪73、一第-齒輪列74以及-第 同歹J 75 ’上述主動齒輪73 一 乃皆設置於搖f 72上，^ 齒輪列74、 八別付你士 * ，、中弟一、第二齒輪列74、75係 刀 動齒輪73之相反侧並且與主動73 口告入、 於本實施例中，前述m |认 助w輪73¾合。 741，第-去丨 齒輪列74僅具有一第一齒輪 '十、第了輪列75則具有兩個第二齒輪751 ;缺而，前 述弗一、第二齒輪列74、 …、啪刖 有奇數個（例如-個、3視不同設計需求而分別具 個(例如二個、四個五個）第—齒輪Μ以及偶數 U四個或六個）第二齒輪751。 萄本發明之饋紙機構呈現如4 擋止部51b與紙堆S之間具有—第：角斤;之狀態父前述 弟 角度Q，此時透過擋0535-A21232TWF(N2); A04473; TKLIN 8 *1304021 The stopper 51, the rotating member 61 and the rocker gear mechanism 71 are all pivoted on the casing cymbal, and the stopper 51 can be movable to change the angle for Block or guide the paper S1 forward to avoid multiple feeds. Referring to Fig. 3, the stopper 51 mainly includes a pivot shaft jla, a stopper portion 51b, wherein the pivot shaft 51a is pivotally connected to the casing ,, and a projection 51c is disposed under the stopper portion 51b. Referring to Fig. 4, the rotating member 61 mainly includes a cam 61a and a missing tooth gear 61. The missing tooth gear 61b is fixedly coupled to the cam 61a, and is rotatable together with the ς = c in the rotating member. In particular, the stoppers 5i <bumps> are abuttable against the cam 61a. In a preferred embodiment, the aforementioned edentulous structure and the other ridges, such as the rocker wheel mechanism 71 shown in the moving diagram, mainly include a movable = two-moving gear 73, The first gear row 74 and the first 歹 J 75 'the above-mentioned driving gear 73 are all disposed on the rocking f 72, the gear row 74, the eight donkeys*, the middle brother one, the second gear row 74, The 75-series cutter gear 73 is opposite to the side and is in contact with the active slot 73. In the present embodiment, the aforementioned m|recognition w-wheel 733⁄4 is combined. 741, the first-to-be-twisted gear row 74 has only one first gear '10, and the first wheel train 75 has two second gears 751; however, the aforementioned first and second gear trains 74, ... An odd number (for example, one, three depending on different design requirements and one (for example, two, four five) first gears and even U four or six) second gears 751. The paper feeding mechanism of the present invention has a state in which the fourth block portion 51b and the paper stack S have the same angle:
0535-Α21 232TWF(N2)；A04473；TKLIN ⑧ 9 1304021 止部51b可有效地防止置紙匣41内之紙堆S沿饋紙方向A 滑落，進而可避免多重進紙的情況發生。當欲進行饋紙動 作時，前述搖臂齒輪機構71首先係移動至一第一位置（如 第4圖所示），此時位在搖臂齒輪機構71末端之第一齒輪 741與轉動件61上之缺齒齒輪61b喃合，並且透過主動齒 輪73係沿順時針方向旋轉以帶動凸輪61朝一第一方向 A1(順時針方向）旋轉。特別地是，在凸輪61轉動的過程中 可藉由其輪廓變化而調整擋止件51之姿態，進而使得擋止 p 件51由第4圖所示之第一角度α變化至一第二角度/3 (如 第5圖所示），其中第二角度/3係大於第一角度α。 接著請參閱第5圖，當檔止件51相對於紙堆S旋轉至 第二角度石時，由於第一齒輪741係運動至缺齒齒輪61b 之缺齒部61b’而與轉動件61脫離，此時擋止部51則不 再運動，並且擋止部51b與紙堆S之間係維持於前述第二 角度/5，以利取紙滾輪對紙張紙堆S最上層之紙張S1進行 單張饋紙之動作。 • 接著，在完成饋紙程序之後，前述主動齒輪73係沿逆 時針方向反轉，此時整個搖臂齒輪機構71係隨著主動齒輪 73沿逆時針方向轉動至一第二位置（如第6圖所示），進而 使得第二齒輪列75末端之第二齒輪751與轉動件61上之 缺齒齒輪61b嗜合。於本實施例中，由於第二齒輪列75 係具有偶數個第二齒輪751，因此當主動齒輪73持續沿逆 時針方向旋轉時仍可透過第二齒輪列75帶動凸輪61繼續 地沿第一方向A1(順時針方向）旋轉，直到第二齒輪751運 0535-A21232TWF(N2)；A04473；TKLIN 10 1304021 動至缺齒齒輪61b之缺齒部61b’而脫離轉動件61為止（如 第7圖所示）。 於第7圖中，前述擋止部51與紙堆S之夾角係回復至 如第4圖所示之第一角度α，此時擋止部51可有效地防止 置紙匣41内之紙堆S沿前述饋紙方向Α滑落。然而，當 欲再次進行饋紙動作時，則可使主動齒輪73沿順時針方向 旋轉，此時搖臂齒輪機構71由於受到主動齒輪73帶動而 由第二位置（如第7圖所示之狀態）沿順時針方向旋轉至第 p —位置（如第4圖所示之狀態），進而使得第一齒輪741與 轉動件61上之缺齒齒輪61b嗜合。 綜上所述，本發明藉由在轉動件61上設置缺齒齒輪 61b以及凸輪61a，同時在主動齒輪73兩側分別設置奇數 個第一齒輪741以及偶數個第二齒輪741，其中當搖臂齒 輪機構71位於第一位置且主動齒輪73沿順時針方向旋轉 時(如第4圖所示），缺齒齒輪61b與凸輪a可沿第一方向（順 時針方向）旋轉，進而可帶動擂止部51b旋轉並使得擋紙部 ⑩ 51b與紙堆S之間形成第一角度α。相反地，當搖臂齒輪 機構71位於第二位置且主動齒輪73逆時針旋轉時（如第6 圖所示），缺齒齒輪6lb與凸輪a可沿第一方向（順時針方 向）旋轉，進而可帶動擋止部51b旋轉旋轉並使得擂紙部 51b與紙堆S之間形成第二角度/5。特別地是，當搖臂齒 輪機構71運動至前述缺齒齒輪61b之缺齒部61b’時可自 動地脫離轉動件61，進而使得擋止部51b與紙堆S之間可 維持於前述第一角度α或者第二角度石，如此一來可藉由 110535-Α21 232TWF(N2); A04473; TKLIN 8 9 1304021 The stop portion 51b can effectively prevent the paper stack S in the paper cassette 41 from sliding down in the paper feed direction A, thereby avoiding the occurrence of multiple paper feed. When the paper feeding operation is to be performed, the rocker arm gear mechanism 71 is first moved to a first position (as shown in FIG. 4), and the first gear 741 and the rotating member 61 are located at the end of the rocker gear mechanism 71. The upper missing tooth gear 61b is slid and rotated in the clockwise direction by the driving gear 73 to drive the cam 61 to rotate in a first direction A1 (clockwise direction). In particular, the posture of the stopper 51 can be adjusted by the change of the contour during the rotation of the cam 61, so that the blocking p member 51 is changed from the first angle α shown in FIG. 4 to a second angle. /3 (as shown in Figure 5), where the second angle / 3 is greater than the first angle a. Next, referring to FIG. 5, when the stopper 51 is rotated to the second angle stone with respect to the paper stack S, since the first gear 741 is moved to the missing tooth portion 61b' of the missing tooth gear 61b, it is disengaged from the rotating member 61. At this time, the stopper portion 51 is no longer moved, and the stopper portion 51b and the paper stack S are maintained at the aforementioned second angle /5, so that the paper take-up roller can perform a single sheet on the uppermost sheet S1 of the paper sheet stack S. Paper feeding action. • Then, after the paper feeding process is completed, the driving gear 73 is reversed in the counterclockwise direction, and the entire rocker gear mechanism 71 is rotated in the counterclockwise direction to the second position along with the driving gear 73 (eg, the sixth position). The figure shows that the second gear 751 at the end of the second gear train 75 is in contact with the spur gear 61b on the rotating member 61. In this embodiment, since the second gear train 75 has an even number of second gears 751, when the driving gear 73 continues to rotate in the counterclockwise direction, the second gear train 75 can still drive the cam 61 to continue in the first direction. A1 (clockwise direction) rotation until the second gear 751 carries 0535-A21232TWF (N2); A04473; TKLIN 10 1304021 moves to the missing tooth portion 61b' of the missing tooth gear 61b and is separated from the rotating member 61 (as shown in Fig. 7) Show). In Fig. 7, the angle between the stopper portion 51 and the paper stack S is restored to the first angle α as shown in Fig. 4, and the stopper portion 51 can effectively prevent the paper stack in the paper cassette 41. S slides down along the aforementioned paper feed direction. However, when the paper feeding operation is to be performed again, the driving gear 73 can be rotated in the clockwise direction. At this time, the rocker gear mechanism 71 is driven by the driving gear 73 to be moved by the second position (as shown in FIG. 7). Rotating in the clockwise direction to the p-th position (as shown in Fig. 4), so that the first gear 741 is in contact with the missing tooth gear 61b on the rotating member 61. In summary, the present invention provides an odd-numbered first gear 741 and an even-numbered second gear 741 on both sides of the driving gear 73 by providing the missing gear 61b and the cam 61a on the rotating member 61, wherein the rocker arm When the gear mechanism 71 is in the first position and the driving gear 73 rotates in the clockwise direction (as shown in FIG. 4), the missing tooth gear 61b and the cam a can be rotated in the first direction (clockwise direction), thereby driving The portion 51b is rotated and causes the first angle α to be formed between the paper stopping portion 10 51b and the paper stack S. Conversely, when the rocker gear mechanism 71 is in the second position and the driving gear 73 rotates counterclockwise (as shown in FIG. 6), the missing tooth gear 61b and the cam a are rotatable in the first direction (clockwise direction), thereby The stopper portion 51b can be rotated to rotate and form a second angle /5 between the grip portion 51b and the stack S. In particular, when the rocker gear mechanism 71 moves to the missing tooth portion 61b' of the aforementioned toothless gear 61b, the rotor 61 can be automatically disengaged, so that the first portion of the stopper portion 51b and the stack S can be maintained in the first Angle α or second angle stone, so that it can be 11
0535-A21 232TWF(N2)；A04473；TKLIN0535-A21 232TWF(N2);A04473;TKLIN
Cs) 1304021 _ 控制擋止部51b之姿態以阻擋或導引紙堆S最上層之紙張 S1前進，同時可避免多重進紙的情況發生。Cs) 1304021 _ Controls the posture of the stopper portion 51b to block or guide the sheet S1 of the uppermost layer of the stack S, while avoiding the occurrence of multiple feeds.
1212
0535-A21232TWF(N2)；A04473；TKLIN ③ 1304021 【圖式簡单說明】 第1圖係表示習知饋紙機構之示意圖； 第2圖係表示本發明之饋紙機構示意圖； 第3圖係表示本發明中擋止件之示意圖； 第4圖係表示第一齒輪與缺齒齒輪嚙合之示意圖； 第5圖係表示第一齒輪運動至缺齒部而脫離轉動件之 不意圖， 第6圖係表示第二齒輪與缺齒齒輪嚙合之示意圖；以 » 及 第7圖係表示第二齒輪運動至缺齒部而脫離轉動件之 示意圖。 【主要元件符號說明】 12〜置紙槽 14〜分紙器 16〜轉軸 • 18〜取紙臂 19〜取紙滾輪 41〜置紙槽 51〜擋止件 51 a〜樞軸 5 lb〜擋止部 51 c〜凸塊 61〜轉動件 130535-A21232TWF(N2);A04473;TKLIN 3 1304021 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a conventional paper feeding mechanism; Fig. 2 is a schematic view showing a paper feeding mechanism of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a schematic view showing the meshing of the first gear and the spur gear; FIG. 5 is a schematic view showing the movement of the first gear to the edentulous portion and the detachment of the rotating member, FIG. A schematic diagram showing the engagement of the second gear with the edentulous gear; and the diagram of the movement of the second gear to the missing tooth portion and the detachment of the rotating member are shown in FIGS. [Description of main component symbols] 12 to paper feed slot 14 to paper separator 16 to rotary shaft • 18 to paper take-up arm 19 to pickup roller 41 to paper feed slot 51 to stopper 51 a to pivot 5 lb to stopper 51 c~bump 61~rotating member 13
0535-A21232TWF(N2)；A04473；TKLIN ⑧ 1304021 61 a〜凸輪 61 b〜缺齒齒輪 61b’〜缺齒部 71〜搖臂齒輪機構 72〜搖臂 73〜主動齒輪 74〜第一齒輪列 741〜第一齒輪 | 75〜第二齒輪列 751〜第二齒輪 A〜饋紙方向 A1〜第一方向 C〜中心轴 Η〜殼體 S〜紙堆 S1〜紙張 • α〜第一角度 /3〜第二角度0535-A21232TWF(N2); A04473; TKLIN 8 1304021 61 a~cam 61 b~ missing tooth gear 61b'~ missing tooth portion 71~ rocker gear mechanism 72~ rocker arm 73~ drive gear 74~first gear train 741~ First gear | 75 to second gear train 751 to second gear A to paper feed direction A1 to first direction C to center axis Η to case S to paper stack S1 to paper • α to first angle / 3 to Two angles
0535-A21232TWF(N2)；A04473；TKLIN0535-A21232TWF(N2);A04473;TKLIN