JPS649951B2 - - Google Patents
Info
- Publication number
- JPS649951B2 JPS649951B2 JP13486680A JP13486680A JPS649951B2 JP S649951 B2 JPS649951 B2 JP S649951B2 JP 13486680 A JP13486680 A JP 13486680A JP 13486680 A JP13486680 A JP 13486680A JP S649951 B2 JPS649951 B2 JP S649951B2
- Authority
- JP
- Japan
- Prior art keywords
- paper feed
- paper
- lever
- cam
- feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 description 16
- 210000000078 claw Anatomy 0.000 description 15
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Handling Of Sheets (AREA)
Description
【発明の詳細な説明】
本発明は印刷紙に文字を印刷する小型プリンタ
に係わり、印刷紙を送る紙送り機構、特に印刷紙
の早送り機構に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small printer that prints characters on printed paper, and more particularly to a paper feeding mechanism for feeding printed paper, and particularly to a fast-feeding mechanism for printing paper.
従来の小型プリンタの紙送り機構を第１図に示
す。ゴム製の紙送りローラ１を設けた紙送りロー
ラ軸２に印刷紙３を巻き付け紙押えローラ４を所
定の力で印刷紙３を挾んで紙送りローラ１に押し
付け、紙送りローラ軸２が何らかの力で回転する
と印刷紙３が前へ送られる。この紙送りローラ軸
２を回転させる手段として電磁石５に通電すると
吸引力により紙送りレバー６が軸７を中心に紙送
りバネ８に抗して矢印ｘ方向に回転し、電磁石５
の通電を切ると紙送りバネ８の力により紙送りレ
バー６が矢印ｙ方向に動く。この動きにより紙送
りレバー６に回転可能に設けた紙送り爪１０が紙
送り軸２に設けた紙送り爪車９を所定量回転させ
る。この動きは紙送り軸２をも回転させる為印刷
紙３は所定量送り出されるものである。この様な
機構では電磁石５の吸引力は紙送りバネ８の力以
上を必要とする為非常に大きいエネルギーを必要
とした。従つて多大な吸引力を取り出す為に大電
流を電磁石に流す為駆動トランジスタは容量の大
きいものを使用する必要がありコスト高となつて
いた。又、多大な吸引力を取り出す為に電磁石の
大きさも大きいものとしなければならず大型化と
なる欠点があつた。さらに紙送りをする時に電磁
石が吸引した時の衝突の音、あるいは紙送りバネ
力により紙送りレバー６が矢印ｙ方向へ動いた時
の衝突音は共に非常に音が大きくなる欠点があつ
た。 FIG. 1 shows the paper feeding mechanism of a conventional small printer. Wrap the printing paper 3 around the paper feed roller shaft 2 equipped with a rubber paper feed roller 1, and press the paper press roller 4 between the paper feed rollers 1 and 1 with a predetermined force to pinch the printing paper 3. When rotated by force, the printing paper 3 is sent forward. When the electromagnet 5 is energized as a means for rotating the paper feed roller shaft 2, the paper feed lever 6 rotates about the shaft 7 in the direction of arrow x against the paper feed spring 8 due to the attraction force, and the electromagnet 5
When the power is turned off, the paper feed lever 6 moves in the direction of the arrow y by the force of the paper feed spring 8. This movement causes the paper feed pawl 10 rotatably provided on the paper feed lever 6 to rotate the paper feed pawl wheel 9 provided on the paper feed shaft 2 by a predetermined amount. This movement also rotates the paper feed shaft 2, so that the printing paper 3 is fed out by a predetermined amount. In such a mechanism, the attractive force of the electromagnet 5 requires more than the force of the paper feed spring 8, and therefore requires a very large amount of energy. Therefore, in order to cause a large current to flow through the electromagnet in order to extract a large attractive force, it is necessary to use a drive transistor with a large capacity, resulting in high costs. Furthermore, in order to extract a large amount of attractive force, the size of the electromagnet must be large, which has the disadvantage of increasing the size of the electromagnet. Furthermore, there is a drawback that the collision sound when the electromagnet is attracted when paper is fed, or the collision sound when the paper feed lever 6 moves in the direction of the arrow y due to the force of the paper feed spring, are both extremely loud.
本発明はかかる欠点を除去したものであり、そ
の目的は低消費電力で紙送りが行なえることであ
る。他の目的は小型な電磁石を使用した紙送り装
置により小型なプリンタを供給することにある。
さらに他の目的は紙送り時の音の小さい小型プリ
ンタを供給することにある。 The present invention eliminates these drawbacks, and its purpose is to feed paper with low power consumption. Another purpose is to provide a compact printer with a paper feed device using small electromagnets.
Still another object is to provide a compact printer that makes less noise when feeding paper.
本発明を第２図を用いて説明する。 The present invention will be explained using FIG.
１１はゴム製の紙送りローラであり紙送り軸１
３に固定されている。１５は紙押えローラであり
紙送りローラ１１に印刷紙１４を挾んで所定の力
で押圧している。１２は外周に鋸歯状の歯を有し
紙送り軸１３に固定した紙送り爪車である。１６
は軸２３を回転中心として回動可能な紙送りレバ
ー、１７は紙送りレバー１６に軸２４を中心に回
動可能に取り付けられ、紙送り爪車１２の鋸歯状
歯と係合しこれを回転させる紙送り爪である。１
８はモータ等の原動力により矢印ｂ方向に回転
し、しかもプリンタの１印字サイクルに１回転す
る様に同期しており、又紙送りレバー１６と係合
し、紙送りレバー１６を揺動回転する様にカム部
を３個所持つた紙送りカムである。１９は紙送り
レバー１６の一部を係止し、紙送りレバー１７の
揺動を制御する係止レバーである。２０は電磁石
で係止レバー１９を矢印ａ方向に動かす。２８は
矢印ｈ方向に回転しプリンタの１印字サイクルに
１回転する様に同期してあり、あるタイミングを
もつて係止レバー１９を矢印ａ方向へ動かす係止
解除カムである。２１は桁数設けた活字輪で活字
輪軸２５に軸支されている。２６は選択爪で印字
したい活字を印字位置に係止する。２２は印刷紙
１４を介して活字輪２１に設けた活字２１１を押
圧して印刷するプラテンである。尚活字輪２１と
活字輪軸２５とは摩擦等で係合しており、選択爪
２６が活字輪２１に設けた選択歯２１２を係止し
た時、活字輪軸２５は先行して回転するが活字輪
２１はそこで止まることができる。 11 is a paper feed roller made of rubber, and the paper feed shaft 1
It is fixed at 3. Reference numeral 15 denotes a paper pressing roller which holds the printing paper 14 between the paper feed rollers 11 and presses it with a predetermined force. Reference numeral 12 denotes a paper feed ratchet wheel which has serrated teeth on its outer periphery and is fixed to the paper feed shaft 13. 16
17 is a paper feed lever that is rotatable about the shaft 23, and 17 is attached to the paper feed lever 16 so as to be rotatable about the shaft 24, and engages with the serrated teeth of the paper feed ratchet wheel 12 to rotate it. This is the paper feed claw. 1
8 is rotated in the direction of arrow b by a driving force such as a motor, and is synchronized so that it rotates once per printing cycle of the printer, and also engages with the paper feed lever 16 to swing and rotate the paper feed lever 16. It is a paper feed cam with three cam parts. Reference numeral 19 denotes a locking lever that locks a part of the paper feed lever 16 and controls the swinging of the paper feed lever 17. Reference numeral 20 uses an electromagnet to move the locking lever 19 in the direction of arrow a. Reference numeral 28 denotes a lock release cam that rotates in the direction of arrow h and is synchronized so that it rotates once per printing cycle of the printer, and moves the locking lever 19 in the direction of arrow a at a certain timing. 21 is a type wheel provided with a number of digits, and is supported by a type wheel shaft 25. Reference numeral 26 uses a selection claw to lock the type to be printed at the printing position. A platen 22 presses the type 211 provided on the type wheel 21 through the printing paper 14 to print. The type wheel 21 and the type wheel shaft 25 are engaged by friction or the like, and when the selection claw 26 locks the selection tooth 212 provided on the type wheel 21, the type wheel shaft 25 rotates in advance, but the type wheel 21 can stop there.
この様な構成からなる小型プリンタの動作を次
に説明する。タイミングチヤート（第３図）を併
用し説明する。 The operation of the compact printer having such a configuration will be explained next. This will be explained using a timing chart (Fig. 3).
プリンタの行程として活字輪選択行程、印字行
程、活字輪リセツト行程があり、この順序に従つ
て述べる。まず印字指令がはいると、モータが回
転して活字輪軸２５を矢印ｃ方向へ回転させる。
この活字輪軸２５が回転し始めると活字輪２１も
同時に回転し始め、この動きに同期してタイミン
グパルスを発生させる。このタイミングパルスは
活字輪２１上のそれぞれの活字２１１の位置を検
出するものである。印字させたい活字２１１が印
字位置（プラテン２２との対向位置）に近づいた
時、電磁石にタイミングパルスの信号と同期をと
つて通電し電磁石の力で選択爪２６を矢印ｄ方向
へ駆動し、選択爪２６の先端が活字輪２１に設け
た選択歯２１２に飛び込み活字輪２１をその位置
で止める。もちろん印字位置には印字したい活字
がセツトされるわけである。この動作を全桁同様
に行ない、印字したい活字を印字位置にセツトし
活字輪選択行程を終了する。尚説明の中でモータ
及び選択爪２６を駆動する電磁石は図示してな
い。次に印字行程を説明する。これはモータの力
でプラテン２２を矢印ｅ方向に駆動し、印刷紙１
４を介して選択された活字２１１を押圧し、印刷
するものである。この時活字２１１にはインクロ
ーラによりインクを転写するか、あるいはインク
リボンを使用するか等の印刷手段を用いる。 The processes of the printer include a type wheel selection process, a printing process, and a type wheel reset process, which will be described in this order. First, when a printing command is received, the motor rotates to rotate the type wheel shaft 25 in the direction of arrow c.
When the type wheel shaft 25 begins to rotate, the type wheel 21 also begins to rotate at the same time, and a timing pulse is generated in synchronization with this movement. This timing pulse detects the position of each type character 211 on the type wheel 21. When the type 211 to be printed approaches the printing position (position facing the platen 22), the electromagnet is energized in synchronization with the timing pulse signal, and the selection claw 26 is driven in the direction of arrow d by the force of the electromagnet, and selected. The tip of the pawl 26 jumps into a selection tooth 212 provided on the type ring 21 and stops the type ring 21 at that position. Of course, the type to be printed is set at the print position. This operation is performed in the same way for all digits, the type to be printed is set at the printing position, and the type wheel selection process is completed. In the description, the motor and the electromagnet that drives the selection claw 26 are not shown. Next, the printing process will be explained. This drives the platen 22 in the direction of arrow e with the power of the motor, and
4, the selected type 211 is pressed and printed. At this time, printing means such as transferring ink with an ink roller or using an ink ribbon is used for the printed characters 211.
次に活字輪リセツト行程であるが、選択された
活字輪を元の待機状態に戻す行程であり具体的に
は活字輪軸２５を矢印ｃ方向とは逆方向へ回転し
途中で選択していた活字輪２１を次々にひろつて
最後には初期の状態にセツトする。以上プリンタ
の印字機構を説明したが次に紙送りの機構につい
て説明する。紙送り機構には２つの状態があり、
その１つはプリンタが印刷した後、活字輪リセツ
ト行程中に１行分紙を送る通常の紙送りと、もう
１つは印刷はしないが紙を早いスピードで送り出
したい時に行なう紙の早送りとがある。 Next is the type wheel reset process, which is a process to return the selected type wheel to its original standby state. Specifically, the type wheel shaft 25 is rotated in the direction opposite to the direction of arrow c, and the type selected in the middle is rotated. The rings 21 are expanded one after another and finally set to the initial state. Having described the printing mechanism of the printer above, the paper feeding mechanism will now be described. The paper feed mechanism has two states.
One is the normal paper feed, which feeds the paper one line during the type wheel reset process after the printer prints, and the other is the fast paper feed, which is used when you do not want to print but want to feed the paper at a faster speed. be.
通常の紙送りを説明する。まず印字指令がはい
りモータが回転すると活字輪軸２５も回転し活字
輪選択行程にはいるが、この動きと同期して紙送
りカム１８も矢印ｂ方向へ回転する。紙送りカム
が回転すると、初期には紙送りカム１８の第１の
外径部１８１に係合していた紙送りレバー１６が
第１の溝部１８２に落ち込もうとして軸２３を回
転中心に矢印ｆ方向に回転する。回転力は紙送り
レバーバネ２７により与えられる。しかしながら
紙送りレバー１６はわずか回転すると先端部１６
１が係止レバー１９に引掛かりそれ以上は回転し
ない。さらに紙送りカム１８が回転すると第２の
外径部１８３が紙送りレバー１６を再び矢印ｇ方
向へわずか戻す。紙送りカム１８がさらに回転し
て第２の溝部１８４、及び第３の外径部１８５が
紙送りレバー１６に対向する位置にきても前と同
様に紙送りレバー１６はわずか揺動回転するだけ
であり、紙送り爪１７で紙送り爪車１２を回転す
ることがないので紙送りはしない。ここまで活字
輪選択行程は終了している。印字行程中は紙送り
レバー１６は紙送りカム１８の第３の外径部１８
５に接触した状態でいる。印字行程が終了して活
字輪リセツト行程にはいると、紙送りレバー１６
は今度は第３の溝部１８６にはいろうとする。こ
の時に係止レバー１９は係止解除カム２８により
矢印ａ方向に回転される為、紙送りレバー１６は
前述の第１、第２の溝１８２，１８４に落ち込む
場合とは異なり完全に溝部１８６の最小径部に到
達するまで矢印ｆ方向に回転する。この動きによ
り紙送り爪１７が紙送り爪車１２を矢印ｉ方向に
１歯分送り、紙送りローラも同方向に回転し印刷
紙１４も紙送りローラ１１との摩擦力により一定
量送り出される。紙送りカム１８の第１の外径部
１８１が紙送りレバー１６と係合すると紙送りレ
バー１６は矢印ｇ方向へ戻され、紙送り爪１７も
紙送り爪車１２の爪の外径をすべりながら元の位
置に戻され、今まで喰い合つていた爪の隣の爪と
係合する位置までくる。係止レバー１９は紙送り
レバー１６の先端１６１が係止する位置に戻る。
もちろん係止解除カム２８はすでに係止レバー１
９とは係合しない。これで完全にプリンタの初期
状態に戻つたわけであるが、以上が通常の紙送り
の状態の説明である。次に紙の早送りの状態を説
明する。これは通常の紙送りと違いプリンタが１
サイクルする間に紙送りを２度、３度とを行ない
早い速度で紙送りするものである。まず印字指令
によりモータが動き出すと、紙送りカム１８の第
１の外径部１８１から紙送りレバー１６が外れ
る。この時外れようとするわずか前に電磁石２０
に通電をし係止レバー１９を矢印ａ方向に駆動し
ておく。従つて紙送りレバー１６は通常の紙送り
の時は係止レバー１９に係止され紙送りはしなか
つたが、この場合は完全に紙送りカムの溝部１８
２の底部まで回転する為、紙送り爪１７、紙送り
爪車１２、紙送りローラ１１により紙送りがされ
る。これが第３図のタイミングチヤート図の第１
の紙送りである。同様にして紙送りカム１８の第
２の溝部１８４が紙送りレバー１６の対向位置に
くると、再び紙送りレバー１６は揺動し、印刷紙
を送り、タイミングチヤート図の第２の紙送りが
される。この時電磁石２０へは紙送りレバー１９
が紙送りカム１８の第２の溝１８４に落ち込む前
に通電し、係止レバー１９を矢印ａ方向へ動かす
動作は第１の紙送りの場合と全く同様である。又
電磁石２０への通電のタイミングは第３図でもあ
きらかなようにタイミングパルスを基準としてい
る。活字輪選択行程が終了して印字行程にはいる
と通常の紙送りの説明で述べた様に紙送りレバー
１６は紙送りカム１８の第３の外径部１８５に位
置している。プリンターが活字輪リセツト行程に
はいると係止解除カム２８がｈ方向に回転してき
て係止レバー１９を矢印ａ方向へ駆動し、その後
に第３の溝部１８６に紙送りレバー１６が落ち込
み通常の紙送りと全く同様な動きを行ない、第３
図に示す第３の紙送りを行なう。以上でプリンタ
の１印字サイクル紙送りを３回行なう紙の早送り
が終了する。第４図には本発明による他の実施例
を示す。これは第２図に示す装置の紙送り爪と紙
送りレバーとを一体にしたものであり、３１は紙
送り爪を含んだ紙送りレバー、３２は紙送り爪車
である。紙送りレバー３１が矢印ｇ方向へ回転す
る時に紙送り爪車３２の外周を爪部３１１が摺動
可能な様に紙送りレバーの中心の穴３１２は楕円
状としてある。尚その他の構成は第２図の装置と
同様であるので第４図では省略してある。又動作
についても第２図の装置と同様であるので説明は
省略する。 Explain normal paper feeding. First, when a printing command is received and the motor rotates, the type wheel shaft 25 also rotates and a type wheel selection process is entered, and in synchronization with this movement, the paper feed cam 18 also rotates in the direction of arrow b. When the paper feed cam rotates, the paper feed lever 16, which was initially engaged with the first outer diameter portion 181 of the paper feed cam 18, tries to fall into the first groove 182 and rotates around the shaft 23 as shown by the arrow. Rotate in the f direction. The rotational force is provided by a paper feed lever spring 27. However, when the paper feed lever 16 rotates slightly, the tip 16
1 is caught on the locking lever 19 and does not rotate any further. When the paper feed cam 18 further rotates, the second outer diameter portion 183 moves the paper feed lever 16 back slightly in the direction of arrow g. Even when the paper feed cam 18 further rotates and the second groove portion 184 and the third outer diameter portion 185 come to a position facing the paper feed lever 16, the paper feed lever 16 slightly swings and rotates as before. Since the paper feed claw wheel 12 is not rotated by the paper feed pawl 17, the paper is not fed. Up to this point, the type wheel selection process has been completed. During the printing process, the paper feed lever 16 is moved to the third outer diameter portion 18 of the paper feed cam 18.
Stay in contact with 5. When the printing process is completed and the type wheel reset process begins, the paper feed lever 16
Now attempts to enter the third groove 186. At this time, the lock lever 19 is rotated in the direction of the arrow a by the lock release cam 28, so the paper feed lever 16 completely falls into the groove portion 186, unlike the case where it falls into the first and second grooves 182, 184 described above. Rotate in the direction of arrow f until the minimum diameter part is reached. Due to this movement, the paper feed pawl 17 feeds the paper feed ratchet wheel 12 by one tooth in the direction of arrow i, the paper feed roller also rotates in the same direction, and the printing paper 14 is also fed a fixed amount by the frictional force with the paper feed roller 11. When the first outer diameter portion 181 of the paper feed cam 18 engages with the paper feed lever 16, the paper feed lever 16 is returned in the direction of arrow g, and the paper feed claw 17 also slides on the outer diameter of the claw of the paper feed ratchet wheel 12. It is returned to its original position and comes to a position where it engages with the claw next to the claw that was biting together until now. The locking lever 19 returns to the position where the tip 161 of the paper feed lever 16 locks.
Of course, the lock release cam 28 is already connected to the lock lever 1.
It does not engage with 9. The printer has now completely returned to its initial state, and the above is an explanation of the normal paper feeding state. Next, the state of paper fast forwarding will be explained. This is different from normal paper feeding because the printer
The paper is fed twice or three times during the cycle, and the paper is fed at a fast speed. First, when the motor starts moving in response to a print command, the paper feed lever 16 is disengaged from the first outer diameter portion 181 of the paper feed cam 18 . At this time, just before it is about to come off, the electromagnet 20
energize and drive the locking lever 19 in the direction of arrow a. Therefore, during normal paper feeding, the paper feed lever 16 is locked by the locking lever 19 and does not feed the paper, but in this case, the paper feed lever 16 is completely engaged with the groove 18 of the paper feed cam.
2, the paper is fed by the paper feed claw 17, paper feed ratchet wheel 12, and paper feed roller 11. This is the first timing chart in Figure 3.
This is paper feeding. Similarly, when the second groove portion 184 of the paper feed cam 18 comes to a position opposite to the paper feed lever 16, the paper feed lever 16 swings again to feed the printing paper, and the second paper feed in the timing chart is started. be done. At this time, the paper feed lever 19 is connected to the electromagnet 20.
The operation of energizing the paper feed cam 18 before it falls into the second groove 184 of the paper feed cam 18 and moving the locking lever 19 in the direction of the arrow a is exactly the same as in the case of the first paper feed. Further, the timing of energizing the electromagnet 20 is based on the timing pulse, as is clear from FIG. When the print wheel selection process is completed and the printing process begins, the paper feed lever 16 is located at the third outer diameter portion 185 of the paper feed cam 18, as described in the explanation of normal paper feed. When the printer enters the type wheel reset stroke, the lock release cam 28 rotates in the direction h and drives the lock lever 19 in the direction of the arrow a, and then the paper feed lever 16 falls into the third groove 186 and returns to normal position. Perform the same movement as paper feed, and
Perform the third paper feed shown in the figure. This completes the rapid paper feeding of the printer, in which the paper is fed three times in one print cycle. FIG. 4 shows another embodiment according to the present invention. This is a combination of a paper feed claw and a paper feed lever of the device shown in FIG. 2, and 31 is a paper feed lever including a paper feed claw, and 32 is a paper feed ratchet wheel. A hole 312 at the center of the paper feed lever is formed in an elliptical shape so that the claw portion 311 can slide on the outer periphery of the paper feed ratchet wheel 32 when the paper feed lever 31 rotates in the direction of arrow g. The rest of the configuration is the same as the device shown in FIG. 2, so it is omitted in FIG. 4. Furthermore, since the operation is similar to that of the apparatus shown in FIG. 2, a description thereof will be omitted.
以上説明した様に本発明によれば、紙送りカム
部材に複数個のカム部を形成してあるので、電磁
石へは任意に１回もしくは複数回繰り返し通電す
れば、あとは紙送りカム部材と紙送りレバーとの
係合によつて必要とする記録紙の送り量が可変で
きるので、電磁石へは連続通電をする必要がなく
低消費駆動が可能となるものであります。更に、
紙送り爪車と紙送り爪を直接、係合させる構造で
あるのでロスがなくなるとともに紙送り動作不良
をおこすことなく確実に任意の量の紙送りが行な
い得るものであります。又、回動する紙送りレバ
ーの１端で爪車を駆動し他端をカムにより駆動す
る構造をとることにより、紙送りに要する力を軽
減し、更に紙送り時カムによつて紙送りレバーが
徐々に移動するようにしたので衝撃音がなく静か
な紙送り機構を提供できるものである。 As explained above, according to the present invention, a plurality of cam parts are formed on the paper feed cam member, so if the electromagnet is energized arbitrarily once or repeatedly, the paper feed cam member can be connected to the paper feed cam member. Since the amount of recording paper required can be varied by engaging the paper feed lever, there is no need to continuously energize the electromagnet, allowing for low power consumption. Furthermore,
Since it has a structure in which the paper feed ratchet wheel and paper feed pawl are directly engaged, it eliminates loss and can reliably feed the desired amount of paper without causing paper feed malfunctions. In addition, by adopting a structure in which one end of the rotating paper feed lever drives a ratchet wheel and the other end is driven by a cam, the force required for paper feed is reduced, and the cam also controls the paper feed lever when feeding paper. Since the paper is moved gradually, it is possible to provide a quiet paper feeding mechanism with no impact noise.
第１図は従来の小型プリンタの紙送り装置の実
施例であり、１は紙送りローラ、２は紙送りロー
ラ軸、３は印刷機、４は紙押えローラ、５は電磁
石、６は紙送りレバー、９は紙送り爪車、１０は
紙送り爪である。
第２図は本発明による小型プリンタの紙送り装
置の具体例であり、１１は紙送りローラ、１２は
紙送り爪車、１３は紙送り軸、１４は印刷紙、１
５は紙押えローラ、１６は紙送りレバー、１７は
紙送り爪、１８は紙送りカム、２０は電磁石、２
８は係止解除カムである。
第３図は本発明による紙送り装置を装備した小
型プリンタのタイミングチヤート図である。
第４図は本発明による小型プリンタの紙送り装
置の他の具体例であり、３１は紙送りレバー、３
２は紙送り爪車である。
Figure 1 shows an example of a paper feeding device for a conventional small printer, in which 1 is a paper feeding roller, 2 is a paper feeding roller shaft, 3 is a printing machine, 4 is a paper presser roller, 5 is an electromagnet, and 6 is a paper feeding device. The lever, 9, is a paper feed ratchet wheel, and 10 is a paper feed pawl. FIG. 2 shows a specific example of a paper feeding device for a small printer according to the present invention, in which 11 is a paper feeding roller, 12 is a paper feeding ratchet wheel, 13 is a paper feeding shaft, 14 is printing paper, 1
5 is a paper press roller, 16 is a paper feed lever, 17 is a paper feed claw, 18 is a paper feed cam, 20 is an electromagnet, 2
8 is a lock release cam. FIG. 3 is a timing chart of a small printer equipped with a paper feeding device according to the present invention. FIG. 4 shows another specific example of the paper feeding device for a small printer according to the present invention, in which 31 is a paper feeding lever;
2 is a paper feed ratchet wheel.
Claims (1)
ンタの紙送り装置において、 紙送りローラと、 該紙送りローラに接合した紙押えローラと、 前記紙送りローラの同軸上に固着されるととも
に複数の歯を有する紙送り爪車と、 該紙送り爪車と間欠的に係合して前記紙送りロ
ーラを同期回転させる紙送り爪と、 一端に前記紙送り爪を備え支点を中心に揺動す
る紙送りレバーと、 該紙送りレバーを前記支点を中心にして前記紙
送り爪が前記紙送り爪車を回動する方向に前記紙
送りレバーを付勢するバネ部材と、 前記紙送りレバーと対向して配置され複数個の
カム部を有し回転する紙送りカム部材と、 前記紙送りレバーの他端と係合して前記紙送り
レバーを前記紙送りカム部材と非係合状態に保持
する係止部材と、 該係止部材を作動させて前記紙送りレバーとの
係合を解除することにより前記紙送りレバーを前
記紙送りカム部材と係合可能にする電磁石とを備
え、 前記紙送りカム部材の複数のカム部は各々前記
紙送りレバーとの係合時前記紙送りレバーを前記
バネ部材に抗して引き上げる第１部分と前記紙送
り爪が前記紙送り爪車を回動するよう前記バネ部
材の付勢力により前記紙送りレバーを徐々に移動
させる第２部分とを備えており、 前記電磁石は前記カム部の第１部分により前記
紙送りレバーが引き上げられたとき非導通状態と
なり前記係止レバーをばねの付勢力により前記紙
送りレバーに係止させ、前記カム部材の第２部分
と前記紙送りレバーが対向するとき導通状態とな
り前記係止レバーを前記紙送りレバーから外すよ
う通電制御されてなることを特徴とする小型プリ
ンタの紙送り装置。[Scope of Claims] 1. A paper feeding device for a small printer that selectively varies the feeding amount of recording paper, comprising: a paper feeding roller, a paper presser roller connected to the paper feeding roller, and a roller coaxially connected to the paper feeding roller. a paper feed pawl that is fixed to the paper feed pawl and has a plurality of teeth; a paper feed pawl that intermittently engages with the paper feed pawl to rotate the paper feed roller synchronously; and the paper feed pawl is provided at one end. a paper feed lever that swings about a fulcrum; a spring member that biases the paper feed lever in a direction in which the paper feed pawl rotates the paper feed ratchet wheel about the fulcrum; a rotating paper feeding cam member having a plurality of cam parts disposed opposite to the paper feeding lever; and a rotating paper feeding cam member that engages with the other end of the paper feeding lever to move the paper feeding lever to the paper feeding cam member. a locking member that is held in a non-engaged state; and an electromagnet that activates the locking member to disengage the paper feed lever so that the paper feed lever can be engaged with the paper feed cam member. each of the plurality of cam parts of the paper feed cam member includes a first portion that pulls up the paper feed lever against the spring member when engaged with the paper feed lever; and a second portion that gradually moves the paper feed lever by the biasing force of the spring member so as to rotate the ratchet wheel, and the electromagnet is configured so that the paper feed lever is pulled up by the first portion of the cam portion. When the second portion of the cam member and the paper feed lever face each other, the locking lever becomes non-conducting and the locking lever is locked to the paper feed lever by the biasing force of the spring. A paper feed device for a small printer, characterized in that the paper feed device is controlled to be energized so as to be removed from a paper feed lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13486680A JPS5759790A (en) | 1980-09-26 | 1980-09-26 | Paper feeder for small printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13486680A JPS5759790A (en) | 1980-09-26 | 1980-09-26 | Paper feeder for small printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5759790A JPS5759790A (en) | 1982-04-10 |
| JPS649951B2 true JPS649951B2 (en) | 1989-02-20 |
Family
ID=15138298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13486680A Granted JPS5759790A (en) | 1980-09-26 | 1980-09-26 | Paper feeder for small printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5759790A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100561430B1 (en) | 2004-05-29 | 2006-03-17 | 삼성전자주식회사 | Automatic document feeding apparatus and image forming apparatus therewith |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52112413A (en) * | 1976-03-13 | 1977-09-20 | Ncr Japan | Recording paper feeding unit |
| JPS5848133Y2 (en) * | 1978-09-13 | 1983-11-02 | 東芝テック株式会社 | Printer paper feed device |
-
1980
- 1980-09-26 JP JP13486680A patent/JPS5759790A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5759790A (en) | 1982-04-10 |
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