1251542 五、發明說明（1) --- 發明所屬之技術領域 特別是有關於一種具有 本發明係有關於一種印表機 取紙滾輪保護機構的印表機。 先前技術 表 之八部八Θ "不~習知的印表機的底座，第lb圖為第la圖 面刀、方大圖。底座1 〇具有一载紙斜面1 2，在載紙斜 ，14， /、取紙滚輪（未圖示）對應的位置上設有一凹陷部 , ’此乃防止當載紙斜面1 2上沒有紙張時，取紙滾輪會和 罕、、、氏斜面產生摩擦而導致取紙滾輪磨損甚至引起取认 <1，動軸的變形或斷裂。如此，當載紙斜面12上沒有紙=调 日守’取紙滾輪可落於凹陷部丨4中空轉而不會與載紙斜面工2 直接接觸。但是在這樣的結構中，當载紙斜面1 2上的紙張 僅剩下數張時，由於取紙滾輪在取紙時會將紙面向凹陷部 1 4推壓’因此會在紙面上留下壓痕。 另 種防止取紙滾輪在無紙張時直接接觸載紙台的裝 置如美國專利US 5 5 2 70 2 6所揭露者。第2a圖表示載紙台^ •載有紙張1 5時，取紙滾輪1 3轉動取紙的狀態。當載紙台2 J •的紙張被取完後，如第2 b圖所示，載紙台21下方安裝有一 滾輪2 7 滾輪2 7經由載紙台2 1上的一凹槽突出而與取紙滾 輪1 3接觸，並伴隨取紙滾輪丨3轉動，藉此避免取紙滾輪u 直接接觸於載紙台2 1。 發明内容 有鑑於此，本發明提供另外一種結構更？簡單的取紙 滾輪的保護裝置，可以避免取紙滚輪與載紙台直接接觸而1251542 V. INSTRUCTION DESCRIPTION (1) --- TECHNICAL FIELD OF THE INVENTION The present invention relates in particular to a printer having a printing roller protection mechanism for a printer. The eight-headed gossip of the previous technical table "not the base of the conventional printer, the first lb is the first figure of the la-faced knife and the square. The base 1 has a paper slanting surface 1 2, and a recessed portion is provided at a position corresponding to the paper slanting, 14 , / and the paper take-up roller (not shown), which prevents the paper from being slanted on the paper slanting surface 1 2 At the same time, the paper take-up roller will rub against the slanting surface of the singularity, and the slanting surface, causing the pickup roller to wear and even cause the deformation or breakage of the moving shaft. Thus, when there is no paper on the paper slanting surface 12, the paper take-up roller can fall in the recessed portion 中空4 without being in direct contact with the paper slanting worker 2. However, in such a configuration, when only a few sheets of paper are placed on the paper bevel 12, since the pickup roller pushes the paper toward the depressed portion 14 when the paper is taken, it leaves a pressure on the paper surface. mark. Another device for preventing the pickup roller from directly contacting the paper carrier when there is no paper is disclosed in U.S. Patent No. 5,5,702,269. Fig. 2a shows the state in which the paper loading table is loaded and the paper take-up roller 13 is rotated. When the paper of the paper loading table 2 J • is taken, as shown in FIG. 2 b , a roller 2 7 is mounted under the paper loading table 21 . The roller 2 7 protrudes through a groove on the paper loading table 2 1 . The paper roller 13 is in contact with the rotation of the pickup roller 丨3, thereby preventing the pickup roller u from directly contacting the paper carrier 21. SUMMARY OF THE INVENTION In view of this, the present invention provides another structure more? Simple paper take-up roller protection device prevents the pickup roller from coming into direct contact with the paper carrier
1251542 -五、發明說明（2) ，造成磨損’同時又不會在列印的紙張上形成壓痕。 本發明之印表機的較佳實施例包括一底座、一驅動 轴、一延伸臂、一取紙滾輪以及一自由臂。底座具有一承 載斜面’用於承載列印用的紙張，並且在承載斜面上設有 一凹槽。驅動軸係橫置於承載斜面的上方，延伸臂係樞接 於驅動軸，延伸臂？設有傳動機構，取紙滾輪係設於延伸 ，臂的前端，並藉由傳動機構由驅動轴驅動而旋轉以輪送紙 張，自由臂的一端樞設於延伸臂上，另一端為自由端，當 承載斜面上的紙張被取用完畢後，自由臂旋轉使自由端嵌 合於凹槽中’以支持延伸臂並使取紙滚輪與承載斜面保持 一適當的距離。 在上述之較佳實施例中，自由臂可依靠本身的重量而 旋轉’使自由端嵌合於凹槽中，或者是在自由臂與延伸臂 之間設置一彈性體，利用彈性體偏壓於自由臂而使自由臂 旋轉’藉此使自由端嵌合於凹槽中。上述之彈性體可為一 扭力彈簧。 為了讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂，下文特舉一較佳實施例，並配合所附圖示，作 詳細說明如下。 你實施方式 第3圖為本發明之印表機的一較佳實施例的立體圖。 弟4圖為弟3圖之分解圖。本發明之印表機包括一底座 100，在底座100上設有一載紙斜面2 0 0，一驅動轴3 0 0橫置 於載紙斜面2 0 0的上方，一延伸臂4〇〇樞接於驅動軸3〇〇，1251542 -5, invention description (2), causing wear and tear, while not forming indentations on the printed paper. A preferred embodiment of the printer of the present invention includes a base, a drive shaft, an extension arm, a pickup roller, and a free arm. The base has a load ramp "for carrying paper for printing" and a recess is provided on the load ramp. The drive shaft is placed above the load ramp, and the extension arm is pivotally connected to the drive shaft and the extension arm? The transmission mechanism is provided, and the paper take-up roller is disposed at the front end of the extension arm, and is driven by the drive shaft to rotate the paper to feed the paper. One end of the free arm is pivoted on the extension arm, and the other end is a free end. After the paper on the load ramp is removed, the free arm rotates to engage the free end in the recess to support the extension arm and maintain the pick roller at an appropriate distance from the load ramp. In the preferred embodiment described above, the free arm can be rotated by its own weight to fit the free end into the recess, or an elastomer can be placed between the free arm and the extension arm, biased by the elastomer The free arm rotates the free arm ' thereby engaging the free end in the recess. The above elastomer may be a torsion spring. The above and other objects, features, and advantages of the present invention will become more apparent and understood by the appended claims appended claims MODE FOR CARRYING OUT THE INVENTION Fig. 3 is a perspective view of a preferred embodiment of the printer of the present invention. Brother 4 is an exploded view of the brother 3 map. The printer of the present invention comprises a base 100. The base 100 is provided with a paper slanting surface 200, a driving shaft 300 is placed across the paper slanting surface 200, and an extending arm 4 is pivotally connected. On the drive shaft 3〇〇,
1251542 β五、發明說明（3) •取紙滾輪5 0 Q則設置於延伸臂4 〇 〇的前端，驅動軸3 〇 〇的動 力經由延伸臂4 0 0中的傳動機構（未圖示）傳動至取紙滚 輪5 00而使取紙滾輪5〇〇轉動。在延伸臂4〇〇上樞設有一自 由臂6 0 0，第5圖為自由臂6 0 〇與延伸臂4 0 0於結合狀態的立 體圖，第6圖為自由臂6 0 0與延伸臂4 〇〇於分解狀態的立體 圖。自由臂600的一端具有一轴部620，軸部620結合於延 ，伸臂4 0 0上的軸孔4 2 0，藉此可旋轉地設於延伸臂4 〇 〇上， 自由臂600的另一端為自由端。 第7a〜1 lb圖表示自由臂6 0 0使取紙滾輪5 0 0避免與載 紙斜面2 0 0直接接觸的狀態圖。如第7a、7b圖所示，在無 紙張置於载紙斜面2 〇 〇的情況下，自由臂6 〇 〇嵌合並抵接於 載紙斜面2 0 〇的一凹槽2 2 0中，藉此支持延伸臂4 〇 〇並使取 、·’氏滾輪5 0 0與載紙斜面2 〇 〇保持一適當的距離，以避免取紙 滾輪5 0 0直接接觸於載紙斜面2〇〇。當紙張7置入載紙斜面 2 0 0 b守自由臂6 〇 〇被紙張7所舉起，而取紙滚輪5 〇 Q則接觸 於紙張7並藉由轉動而進行取紙作業，如第仏、讣圖所 示。隨著紙張7減少，延伸臂40 0的高度會下降，自由臂 6 0 0也隨著紙張的減少而下擺，如第9a、讣圖所示。當紙 _張7於載紙斜面2 0 0剩下最後一張時，如第1〇&、i〇b圖所 ，紙張7的前端進入列印區域，而後端處於緊繃的狀 •恶，此時紙張7會把延伸臂4 0 0舉起至一定的高度，同時自 由臂6 0 0也會隨著延伸臂40 0 一起升高，當紙張了的尾端已 、’二脫離自由| 6 0 0，而尚未脫離延伸臂4 〇 〇時，延伸臂4 〇 〇 仍處於被舉起的狀態，此時自由臂6〇〇會在重力作用下向1251542 β5, invention description (3) • The pickup roller 5 0 Q is disposed at the front end of the extension arm 4 ,, and the power of the drive shaft 3 传动 is transmitted via a transmission mechanism (not shown) in the extension arm 400 The pickup roller 5 turns to the pickup roller 5 00. A free arm 600 is pivoted on the extension arm 4〇〇, and FIG. 5 is a perspective view of the free arm 6 0 〇 and the extension arm 400, and FIG. 6 is a free arm 600 and an extension arm 4. A perspective view of the exploded state. One end of the free arm 600 has a shaft portion 620, and the shaft portion 620 is coupled to the shaft hole 4 2 0 of the extension arm 400, thereby being rotatably disposed on the extension arm 4 ,, the other of the free arm 600 One end is a free end. The 7a to 1 lb diagram shows a state in which the free arm 600 causes the pickup roller 500 to avoid direct contact with the paper slanting surface 200. As shown in Figures 7a and 7b, in the case where no paper is placed on the paper slanting surface 2 ,, the free arm 6 〇〇 fits and abuts against a groove 2 2 0 of the paper slanting surface 20 ,, borrowing This supports the extension arm 4 〇〇 and keeps the take-up roller 50 与 and the paper slant 2 〇〇 at an appropriate distance to prevent the pickup roller 500 from directly contacting the paper slant 2 〇〇. When the paper 7 is placed in the paper slanting surface 2 0 0 b, the free arm 6 〇〇 is lifted by the paper 7, and the paper take-up roller 5 〇Q is in contact with the paper 7 and is taken by the rotation, such as the third drawing , as shown in the picture. As the paper 7 is reduced, the height of the extension arm 40 0 is lowered, and the free arm 600 is also swayed as the paper is reduced, as shown in Fig. 9a and the figure. When the paper_sheet 7 has the last sheet on the paper slanting surface 200, as in the first 〇&, i〇b diagram, the front end of the paper 7 enters the printing area, and the rear end is in a tight state. At this time, the paper 7 will lift the extension arm 400 to a certain height, and the free arm 600 will also rise with the extension arm 40 0. When the end of the paper has been, the two are free. When the extension arm 4 尚未 has not been disengaged from the extension arm 4 〇〇, the extension arm 4 〇〇 is still in the lifted state, and the free arm 6 〇〇 will be directed by gravity.
1251542 ^~ -一 五、發明說明（4) 下旋轉回到凹样？ 臂60 ί)推入πη 中。當紙張7脫離延伸辟m么 月600進入凹槽22〇中並抵接 、伸月4 0 0後’自由 目由臂600支持 *曰2 ’此時延伸臂4〇〇被 如第mub圖所示。，、，、，氏斜面22 0保持—適當的距離， 自由臂6 0 0使取紙滾輪$ 〇 〇座 —適當的距離，而凹神A輻50 〇/、載紙斜面22 0保持 而且當紙張通過時自^ f ;不在取紙滾輪5 0 〇的下方， 日守自由臂600不會對铋语#丄 在紙張上留下壓痕。 + θ對、，.氏張知力，因此不會 第12、13圖表示自由臂6〇〇 一者 在自由臂600與延伸臂4〇〇之間設置·^體圖。 彈簧70 0的一端固定於延伸臂力、黃7〇〇，扭力 臂6 〇 〇上，石LL丄 月4 0 0上’另一端則偏壓於自由 4〇ΛΛ 臂6 0 0旋轉，而增加自由臂600進入凹槽 軸部4:0 : : Ϊ。另外在此實施例中，延伸臂40 〇上設有-部。—由臂60Q上設有一軸孔6 40，軸孔640結合於軸 ° 亚稭由一插銷8 0 0使自由臂6 0 0定位於延伸臂40 〇 R η η°第i 4圖為本實施例之自由臂6 〇 0的立體圖，在自由臂 上設有一突柱6 8 0，供扭力彈簧7 0 0套設於自由臂6〇〇 上:雖然本實施例係以一扭力彈簧7 〇 〇設於延伸臂4 〇 〇與自 ^臂6〇〇σσ之^間，但不限於扭力彈簧，其他彈性物件例如將 一拉伸彈簧之一端設於延伸臂4 〇 〇上，另一端設於自由臂 6 0 0上’亦可起到將自由臂拉向凹槽保證其定位可靠度的 作用。 雖然本發明已以較佳實施例揭露如上，然其並非用以 0535-A21098TWF(N2);F050〇6;CHEiNTF.ptd 第9頁 1251542 ____ •五、發明說明（5) 限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。1251542 ^~ - 1-5, invention description (4) Rotate back to the concave sample? The arm 60 ί) is pushed into πη. When the paper 7 is out of the extension, the month 600 enters the groove 22〇 and abuts and extends the moon 400. The 'free eye is supported by the arm 600*曰2'. At this time, the extension arm 4〇〇 is as shown in the mub diagram. Show. , , , , , , , , , , , 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 When the paper passes through ^ f; not below the pickup roller 5 0 ,, the Japanese free arm 600 does not leave an indentation on the paper. + θ 、 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , One end of the spring 70 0 is fixed to the extension arm force, the yellow 7 〇〇, the torsion arm 6 〇〇, the stone LL 丄 month 400, the other end is biased to the free 4 〇ΛΛ arm 600 rotation, and the freedom is increased. The arm 600 enters the groove shaft portion 4:0 : : Ϊ. Also in this embodiment, the extension arm 40 is provided with a portion. - A shaft hole 6 40 is provided on the arm 60Q, and the shaft hole 640 is coupled to the shaft. The straw is positioned by the latch 80 0 to position the free arm 60 0 to the extension arm 40 〇R η η° For example, a perspective view of the free arm 6 〇 0 is provided with a protruding post 680 on the free arm, and the torsion spring 700 is sleeved on the free arm 6 :: although this embodiment is a torsion spring 7 〇〇 It is disposed between the extension arm 4 〇〇 and the arm 6 σσσ, but is not limited to the torsion spring. For example, one of the tension springs is disposed on the extension arm 4 , and the other end is free. The arm 6 0 0' can also play the role of pulling the free arm toward the groove to ensure its positioning reliability. Although the present invention has been disclosed above in the preferred embodiment, it is not used for 0535-A21098TWF(N2); F050〇6; CHEINTF.ptd page 9 1251542 ____ • V. Invention Description (5) Qualifying the present invention, any familiarity It is to be understood that the scope of the invention is defined by the scope of the appended claims.
0535-A21098TWF(N2);F05006;CHENTF.ptd 第10頁 1251542 圖式簡單說明 第1 a圖為一習知印表機的底座。 第1 b圖為第1圖中A部分的放大圖。 第2 a、2 b圖表示另一習知印表機之保護取紙滾輪的機 構。 第3圖為本發明之印表機的一較佳實施例的立體圖。 第4圖為第3圖之立體分解圖。 .第5圖為本發明之自由臂與延伸臂於結合狀態的立體 圖。 第6圖為本發明之自由臂與延伸臂於分解狀態的立體 圖。 第7a〜1 1 b圖表示本發明之自由臂使取紙滾輪避免與 載紙斜面直接接觸的狀態圖。 第1 2圖表示本發明之自由臂的另一實施例的立體圖。 第13圖表示第12圖之立體分解圖。 第1 4圖為第1 3圖中自由臂的放大圖。 【主要元件符號說明】 7〜紙張； 1 0〜底座； 1 2〜載紙斜面； 1 4〜凹陷部； 1 5〜紙張； 1 3〜取紙滾輪； 2 1〜載紙台；0535-A21098TWF(N2);F05006;CHENTF.ptd Page 10 1251542 Brief Description of Drawings Figure 1a shows the base of a conventional printer. Fig. 1b is an enlarged view of a portion A in Fig. 1. Figures 2a and 2b show another mechanism for protecting the pickup roller of a conventional printer. Figure 3 is a perspective view of a preferred embodiment of the printer of the present invention. Fig. 4 is an exploded perspective view of Fig. 3. Fig. 5 is a perspective view showing the free arm and the extension arm of the present invention in a combined state. Fig. 6 is a perspective view showing the free arm and the extension arm of the present invention in an exploded state. Figs. 7a to 1 1b show a state in which the free arm of the present invention prevents the pickup roller from coming into direct contact with the paper slanting surface. Fig. 12 is a perspective view showing another embodiment of the free arm of the present invention. Fig. 13 is a perspective exploded view showing Fig. 12. Fig. 14 is an enlarged view of the free arm in Fig. 13. [Description of main component symbols] 7~paper; 1 0~base; 1 2~ paper ramp; 1 4~ recessed; 1 5~ paper; 1 3~ pickup roller; 2 1~ paper carrier;
0535-A21098TWF(N2);F05006;CHENTF.ptd 第11頁 1251542 圖式簡單說明 2 7〜滾輪； 100〜底座； 2 0 0〜載紙斜面； 2 2 0〜凹槽； 3 0 0〜驅動轴； 4 0 0〜延伸臂； 4 2 0〜轴孔； 4 4 0〜軸部； 5 0 0〜取紙滾輪； 6 0 0〜自由臂； 6 2 0〜軸部； 6 4 0〜軸孔； 68 0〜突柱； 7 0 0〜扭力彈簧； 8 0 0〜插鎖。0535-A21098TWF(N2);F05006;CHENTF.ptd Page 111251542 Schematic description 2 7~wheel; 100~ base; 2 0 0~ paper ramp; 2 2 0~ groove; 3 0 0~ drive shaft ; 4 0 0~ extension arm; 4 2 0~ shaft hole; 4 4 0~ shaft part; 5 0 0~ pickup roller; 6 0 0~ free arm; 6 2 0~ shaft part; 6 4 0~ shaft hole ; 68 0 ~ stud; 7 0 0 ~ torsion spring; 8 0 0 ~ mortise lock.
0535-A21098TWF(N2);F05006;CHENTF.ptd0535-A21098TWF(N2); F05006; CHENTF.ptd