JPS6219476A - Head driver for thermal printer - Google Patents
Head driver for thermal printerInfo
- Publication number
- JPS6219476A JPS6219476A JP15994885A JP15994885A JPS6219476A JP S6219476 A JPS6219476 A JP S6219476A JP 15994885 A JP15994885 A JP 15994885A JP 15994885 A JP15994885 A JP 15994885A JP S6219476 A JPS6219476 A JP S6219476A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- support
- home position
- recess
- protrusion
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J19/00—Character- or line-spacing mechanisms
- B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
- B41J19/20—Positive-feed character-spacing mechanisms
- B41J19/202—Drive control means for carriage movement
Landscapes
- Common Mechanisms (AREA)
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、サーマルプリンタのヘッド駆動装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a head drive device for a thermal printer.
従来の技術
従来、サーマルヘッドを保持する支持体をカムにより回
動させてサーマルヘッドをプラテンに接離させ、カムの
回転角を検出器により検出し、これによりサーマルヘッ
ドがプラテンから離反するホームポジションに支持体を
復帰させるようにしたものがある。Conventional technology Conventionally, the support body holding the thermal head is rotated by a cam to move the thermal head toward and away from the platen, and the rotation angle of the cam is detected by a detector, which causes the thermal head to move away from the platen at the home position. There is one in which the support is returned to its original state.
発明が解決しようとする問題点
しかし、支持体をホームポジションに位置決めする検出
器を必要とするため構造が複雑化する問題がある。Problems to be Solved by the Invention However, since a detector is required to position the support at the home position, the structure becomes complicated.
この発明はこのような点に鑑みなされたもので、検出器
を用いることなく支持体をサーマルヘッドとともにホー
ムポジションに位置決めすることができるサーマルプリ
ンタのヘッド駆動装置をうることを目的とする。The present invention has been made in view of the above points, and an object of the present invention is to provide a head driving device for a thermal printer that can position a support body together with a thermal head at a home position without using a detector.
問題点を解決するための手段
この発明は、サーマルヘッド６を保持する支持体５をプ
ラテン１に対して接離させる作動体１０を設け、この作
動体１０に突部１２を設け、正逆回転自在のステップモ
ータ１６に駆動されるカム１９を設け、このカム１９の
外周に凹部２０と制御面２１とを形成し、突部１２に係
合してカム１９の一方向への回転動作を阻止するストッ
パ２３をカム１９の外周に形成し、カム１９のカムシャ
フト２２に当接するアー１１１３を作動体１ｏに一体的
に形成する。Means for Solving the Problems The present invention provides an actuating body 10 that moves the support body 5 holding the thermal head 6 toward and away from the platen 1, and this actuating body 10 is provided with a protrusion 12, so that it can be rotated in forward and reverse directions. A cam 19 driven by a freely movable step motor 16 is provided, and a recess 20 and a control surface 21 are formed on the outer periphery of the cam 19 to engage with the protrusion 12 to prevent the cam 19 from rotating in one direction. A stopper 23 is formed on the outer periphery of the cam 19, and an arm 1113 that comes into contact with the camshaft 22 of the cam 19 is formed integrally with the actuating body 1o.
作用
作動体１０Φ突部１２をカム１９の制御面２１に接触さ
せ、カム１９を回転をさせ作動体１０を回動させ支持体
５を回動させ、これによりサーマルヘッド６をプラテン
１に接離させる。カム１９を任意位置から回転させ突部
１２を凹部２０に係合させると支持体５がプラテン１か
ら離反するホームポジションに位置する。なおもカム１
９を回転させても突部１２がストッパ２３に当接してカ
ム１９の回転運動が阻止される。したがって、支持体５
のホームポジションはステップモータ１６を余分に回転
させるだけで容易に決まる。カム１９の回転が阻止され
てた後はステップモータ１６が脱調する。しかも１作動
体１０のアーム１３とカムシャフト２２との当接により
作動体１０及び支持体５の回動角度が正確に定められ、
サーマルヘッド６のホームポジションが正確に定められ
、カム１９の製作をも容易にする。The actuator 10Φ protrusion 12 is brought into contact with the control surface 21 of the cam 19, the cam 19 is rotated, the actuator 10 is rotated, and the support body 5 is rotated, thereby causing the thermal head 6 to approach and separate from the platen 1. let When the cam 19 is rotated from an arbitrary position and the protrusion 12 is engaged with the recess 20, the support body 5 is located at the home position away from the platen 1. Naomo cam 1
Even when the cam 9 is rotated, the protrusion 12 comes into contact with the stopper 23 and the rotational movement of the cam 19 is blocked. Therefore, the support 5
The home position of is easily determined by simply rotating the step motor 16 extra. After the rotation of the cam 19 is blocked, the step motor 16 goes out of step. Moreover, the rotation angle of the actuating body 10 and the support body 5 is accurately determined by the contact between the arm 13 of the actuating body 10 and the camshaft 22,
The home position of the thermal head 6 is accurately determined, and the manufacture of the cam 19 is also facilitated.
実施例 この発明の一実施例を図面に基づいて説明する。Example An embodiment of this invention will be described based on the drawings.
プラテン１と平行なシャフト２．３にキャリア４−が摺
動自在に保持されている。このキャリア４にはシャフト
２に回動及び摺動自在に保持された支持体５が設けられ
、この支持体５にサーマルヘッド６が着脱自在に保持さ
れている。支持体５の下面から突出する軸７に係合する
コの字形の摺動部８を有する揺動体９の両端がシャフト
２に回動自在に嵌合されている。また、回動運動を揺動
体９を介して支持体５に付与する作動体１０がシャフト
２の端部に回動自在に嵌合されている。この作動体１０
は、摺動部８に係合するアーム１１と側面から突部１２
を突出させたアーム１３とを有し。A carrier 4- is slidably held on a shaft 2.3 parallel to the platen 1. The carrier 4 is provided with a support 5 rotatably and slidably held on the shaft 2, and a thermal head 6 is removably held on the support 5. Both ends of a rocking body 9 having a U-shaped sliding portion 8 that engages with a shaft 7 protruding from the lower surface of the support body 5 are rotatably fitted to the shaft 2 . Further, an actuating body 10 that imparts rotational motion to the support body 5 via the rocking body 9 is rotatably fitted to the end of the shaft 2. This operating body 10
is an arm 11 that engages with the sliding part 8 and a protrusion 12 from the side.
The arm 13 has a protruding arm 13.
発条１４により時計方向へ付勢されている。揺動体９は
発条１５により反時計方向へ付勢されている。It is biased clockwise by the spring 14. The rocking body 9 is biased counterclockwise by the spring 15.
ついで、正逆回転自在のステップモータ１６の回転をギ
ヤ１７．１８及びカムシャフト２２を介して授受するカ
ム１９が設けられている。このカム１９の外周には突部
１２に係合する凹部２０とこの凹部２０の一側から連続
する制御面２１とが形成されている。カム１９の回転角
は第３図においてａ−ｂ−ｃ−ｄに至る０である。また
、カム１９の外周には凹部２０の他側に連続するストッ
パ２３が形成されている。Next, a cam 19 is provided which transmits and receives the rotation of the step motor 16, which can freely rotate in forward and reverse directions, through gears 17, 18 and a camshaft 22. A recess 20 that engages with the protrusion 12 and a control surface 21 continuous from one side of the recess 20 are formed on the outer periphery of the cam 19. The rotation angle of the cam 19 is 0, which is a-b-c-d in FIG. Further, a stopper 23 is formed on the outer periphery of the cam 19 and continues to the other side of the recess 20 .
このような構成において、カム１９を回転させると作動
体１０がシャフト２を支点として回動し。In such a configuration, when the cam 19 is rotated, the actuating body 10 rotates about the shaft 2 as a fulcrum.
アーム１１と摺動部８との係合により揺動体９がシャフ
ト２を支点として揺動し、摺動部８と軸７との嵌合によ
り支持体５がシャフト２を支点として回動し、サーマル
ヘッド６がプラテン１に対して接離する。第３図はカム
１９の凹部２０に突部１２が係合し、支持体５がサーマ
ルヘッド６とともにプラテン１から離反した状態である
。この状態からカム１９を反時計方向へ回転させようと
しても、ストッパ２３が突部１２に当接するのでカム１
９は回転しない。また、この状態では作動体１ｏのアー
ム１３の先端１３ａがカムシャフト２２に当接する。カ
ム１９を時計方向へ回転させると制御面２１の半径が徐
々に増加するので、作動体１０と揺動体９とは第４図に
示すように反時計方向へ回動し、サーマルヘッド６がプ
ラテン１に弾発的に接触する。The engagement between the arm 11 and the sliding part 8 causes the rocking body 9 to swing around the shaft 2, and the engagement between the sliding part 8 and the shaft 7 causes the support 5 to rotate around the shaft 2, The thermal head 6 approaches and separates from the platen 1. FIG. 3 shows a state in which the protrusion 12 is engaged with the recess 20 of the cam 19, and the support 5 and the thermal head 6 are separated from the platen 1. Even if you try to rotate the cam 19 counterclockwise from this state, the stopper 23 will come into contact with the protrusion 12, so the cam 19 will rotate counterclockwise.
9 does not rotate. Further, in this state, the tip 13a of the arm 13 of the actuating body 1o comes into contact with the camshaft 22. When the cam 19 is rotated clockwise, the radius of the control surface 21 gradually increases, so the operating body 10 and the oscillating body 9 rotate counterclockwise as shown in FIG. Contact 1 elastically.
突部１２が制御面２１上のどの位置にいようとも、ステ
ップモータ１６を余分に回転させてカム１９を反時計方
向へ回転させると突部１２は凹部２０に落ち込み、第３
図のように支持体５がホームポジションに位置決めされ
る。このとき、アーム１３の先端１３ａがカムシャフト
２２に当接し。No matter where the protrusion 12 is on the control surface 21, if the stepper motor 16 is rotated extra and the cam 19 is rotated counterclockwise, the protrusion 12 will fall into the recess 20 and the third
The support body 5 is positioned at the home position as shown. At this time, the tip 13a of the arm 13 comes into contact with the camshaft 22.
作動体１０及び支持体５の回動角度が定められるため、
サーマルヘッド６のホームポジションを極めて正確に定
めることができる。そして、この状態よりなおも回転す
るステップモータ１６は脱調する。しだがって、支持体
５のホームポジションを決めるために検出器を使用する
必要がなく、構造の簡略化を図ることができる。さらに
、アーム１３とカムシャフト２２との当接により作動体
１０の回動角度が正確に定められるため、カム１９の制
御面２１の寸法精度の許容範囲が広げ−られ。Since the rotation angle of the actuating body 10 and the support body 5 is determined,
The home position of the thermal head 6 can be determined extremely accurately. Then, the step motor 16, which continues to rotate from this state, loses synchronization. Therefore, there is no need to use a detector to determine the home position of the support body 5, and the structure can be simplified. Furthermore, since the rotation angle of the operating body 10 is accurately determined by the contact between the arm 13 and the camshaft 22, the allowable range of dimensional accuracy of the control surface 21 of the cam 19 is widened.
容易に製作することができる。It can be easily manufactured.
ホー１１ポジシヨンから支持体５をプラテン１に向けて
回動させるときは、ステップモータ１６をパルス制御し
てカム１９の回転角を定める。第５図はカム１９の回転
角と作動体１ｏの動作量との関係を示すものであるが、
制御面２１のａ −０間の半径を変化させ、制御面２１
のｃ−ｄ間の半径を等しくすることにより、ホームポジ
ションからカム１９を時計方向へ回転させる初期は作動
体１０の動作量の変化が大きく、中間からは徐々に変化
し、制御面２１のｃ−ｄ間に突部１２が接触する後期は
作動体１ｏの動作量の変化はない、これにより、サーマ
ルヘッド６をプラテン１に静かに接触させることができ
る。制御面２１のｃ −ｄ間の半径に変化がないと言う
ことは、ホームポジションにおけるカム１９の回転角に
多少の位置ずれが生じ、この位置からカム１９を一定角
度回転させたとしても、サーマルヘッド６をプラテン１
に確実に接触させることができる。When rotating the support body 5 toward the platen 1 from the hole 11 position, the rotation angle of the cam 19 is determined by pulse-controlling the step motor 16. FIG. 5 shows the relationship between the rotation angle of the cam 19 and the amount of operation of the operating body 1o.
By changing the radius between a and 0 of the control surface 21, the control surface 21
By making the radius between c and d equal, the change in the amount of operation of the actuating body 10 is large at the beginning of rotating the cam 19 clockwise from the home position, but gradually changes from the middle, and the amount of movement of the control surface 21 is In the latter stage when the protrusion 12 contacts between -d, there is no change in the amount of movement of the actuator 1o.Thereby, the thermal head 6 can be brought into silent contact with the platen 1. The fact that there is no change in the radius between c and d of the control surface 21 means that there is some positional deviation in the rotation angle of the cam 19 at the home position, and even if the cam 19 is rotated by a certain angle from this position, the thermal Head 6 to platen 1
can be securely contacted.
発明の効果
この発明は上述のように構成したので、作動体の突部が
カムの制御面のどの位置にいようとも、ステップモータ
を余分に回転させ突部がカムの凹部に係合した後ステッ
プモータを脱調させることにより、支持体のホームポジ
ションを容易に定めることができ、また、カムの回転位
置を検出する検出器を省略して構造の簡略化を図ること
ができ、しかも、作動体のアームとカムシャフトとの当
接により作動体及び支持体の回動角度を正確に定め。Effects of the Invention Since the present invention is configured as described above, no matter where the protrusion of the actuating body is located on the control surface of the cam, after the step motor is rotated extra and the protrusion engages with the recess of the cam, By letting the step motor step out, the home position of the support body can be easily determined, and the structure can be simplified by omitting the detector that detects the rotational position of the cam. The rotation angle of the actuating body and support body is determined accurately by the contact between the arm of the body and the camshaft.
これにより、サーマルヘッドのホームポジションを正確
に定めることができ、これにともないカムを容易に製作
することができる等の効果を有する。As a result, the home position of the thermal head can be determined accurately, and the cam can be manufactured easily.
図面はこの発明の一実施例を示すもので、第１図は分解
斜視図、第２図は支持体と揺動体との関係を示す分解斜
視図、第３図及び第４図はカムと作動体との動作を示す
側面図、第５図はカムの回転角と作動体の動作量との関
係を示すダイヤグラムである。The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is an exploded perspective view showing the relationship between the support and the rocking body, and FIGS. 3 and 4 show the cam and its operation. FIG. 5, which is a side view showing the movement with the body, is a diagram showing the relationship between the rotation angle of the cam and the amount of movement of the actuating body.
Claims (1)
動運動により前記支持体をプラテンに対して接離させる
作動体を設け、この作動体にその回動軸心と平行に突出
する突部を設け、正逆回転自在のステップモータに連結
されて一回転以内の回転範囲に定められたカムを設け、
このカムの外周に、前記突部に係合して前記支持体を前
記プラテンから離反するホームポジションに固定する凹
部と、この凹部の一側から連続し前記突部に接触して前
記支持体を徐々に前記プラテンに接近させる制御面とを
形成し、前記カムに前記凹部の他側に連続して前記カム
の一方向への回転動作を阻止するストッパを形成し、前
記作動体に前記カムの回転中心となるカムシャフトに当
接して回動角度が規制されるアームを一体的に形成した
ことを特徴とするサーマルプリンタのヘッド駆動装置。A support body for removably holding the thermal head is provided, an actuation body is provided for moving the support body toward and away from the platen through rotational movement, and the actuation body has a protrusion projecting in parallel with the rotation axis of the actuation body. A cam is provided, which is connected to a step motor that can freely rotate in forward and reverse directions, and whose rotation range is within one rotation.
The outer periphery of the cam includes a recess that engages with the protrusion to fix the support at a home position away from the platen, and a recess that continues from one side of the recess and contacts the protrusion to secure the support. a control surface that gradually approaches the platen, a stopper continuous to the other side of the recess for preventing the cam from rotating in one direction, and a stopper that prevents the cam from rotating in one direction; A head drive device for a thermal printer characterized by integrally forming an arm whose rotation angle is regulated by coming into contact with a camshaft that is the center of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15994885A JPS6219476A (en) | 1985-07-19 | 1985-07-19 | Head driver for thermal printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15994885A JPS6219476A (en) | 1985-07-19 | 1985-07-19 | Head driver for thermal printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6219476A true JPS6219476A (en) | 1987-01-28 |
| JPH0516350B2 JPH0516350B2 (en) | 1993-03-04 |
Family
ID=15704654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15994885A Granted JPS6219476A (en) | 1985-07-19 | 1985-07-19 | Head driver for thermal printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6219476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63224982A (en) * | 1987-03-14 | 1988-09-20 | Riso Kagaku Corp | Contact/separation device |
| JPH034701A (en) * | 1989-05-31 | 1991-01-10 | Kobashi Kogyo Co Ltd | Apron device for rotary tiller |
| US5849833A (en) * | 1995-07-21 | 1998-12-15 | Rohm And Haas Company | Method for improving drying speed in printing process and fast dry printing ink used therein |
-
1985
- 1985-07-19 JP JP15994885A patent/JPS6219476A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63224982A (en) * | 1987-03-14 | 1988-09-20 | Riso Kagaku Corp | Contact/separation device |
| JPH034701A (en) * | 1989-05-31 | 1991-01-10 | Kobashi Kogyo Co Ltd | Apron device for rotary tiller |
| US5849833A (en) * | 1995-07-21 | 1998-12-15 | Rohm And Haas Company | Method for improving drying speed in printing process and fast dry printing ink used therein |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516350B2 (en) | 1993-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5058823A (en) | Fishing reel clutch mechanism | |
| JPS6219476A (en) | Head driver for thermal printer | |
| JPH0545863U (en) | Switch lever operation device | |
| JPH0610951B2 (en) | Program timer step drive mechanism | |
| EP0173853B1 (en) | Gear mechanism | |
| JPH0516349B2 (en) | ||
| JPH0581785B2 (en) | ||
| JPS61225086A (en) | Apparatus for driving head of thermal printer | |
| JPH11260194A (en) | Locking mechanism of rotary operating member | |
| JPH0135719Y2 (en) | ||
| US5160207A (en) | Mechanism for correcting the printing position of an electronic typewriter | |
| JPS64679Y2 (en) | ||
| JP2518951Y2 (en) | Shift lever device for transmission | |
| JP2989096B2 (en) | Drive | |
| JPS6141135Y2 (en) | ||
| JPH11111117A (en) | Click mechanism for seesaw-operated electric parts | |
| JPS6110287Y2 (en) | ||
| JPS632964Y2 (en) | ||
| JP4002650B2 (en) | Headlight illumination angle adjustment device | |
| JP2002201842A (en) | Vehicle door lock device | |
| JP2505465Y2 (en) | Rotating member attachment mechanism | |
| JPH0630559Y2 (en) | Return device for vehicle direction control lever | |
| JPH0736353Y2 (en) | Aperture control shutter | |
| JPS645794Y2 (en) | ||
| JPH0822747A (en) | Multi-contact lever switch device |