JPH0547652Y2 - - Google Patents

Info

Publication number
JPH0547652Y2
JPH0547652Y2 JP1985172804U JP17280485U JPH0547652Y2 JP H0547652 Y2 JPH0547652 Y2 JP H0547652Y2 JP 1985172804 U JP1985172804 U JP 1985172804U JP 17280485 U JP17280485 U JP 17280485U JP H0547652 Y2 JPH0547652 Y2 JP H0547652Y2
Authority
JP
Japan
Prior art keywords
hammer
hammer member
diameter portion
opening
coil
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 - Lifetime
Application number
JP1985172804U
Other languages
Japanese (ja)
Other versions
JPS6280644U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1985172804U priority Critical patent/JPH0547652Y2/ja
Publication of JPS6280644U publication Critical patent/JPS6280644U/ja
Application granted granted Critical
Publication of JPH0547652Y2 publication Critical patent/JPH0547652Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Impact Printers (AREA)

Description

【考案の詳細な説明】 [産業上の利用分野] この考案は、印字用紙に向つて活字部材を打撃
することにより印字するプリンタに関する。
[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a printer that prints by striking a type member toward printing paper.

[従来技術] 例えば特開昭54−53026号公報に示す衝撃式プ
リンタに装着される従来の印字ハンマ装置は、中
央部に貫通孔を有するコイルを収容する大径部と
打撃側に支持部材が設けられかつ前記貫通孔と内
径がほぼ一致する小径部とを有する磁性体のケー
ス内に、支持部材に対しハンマ部材の打撃部を摺
動可能に支持するとともに前記貫通孔内に磁性体
製からなるハンマ部材の軸部を収容している。こ
のハンマ部材は弾性部材の弾性力により常に非打
撃側へ付勢されている。そして前記コイルに励磁
電流が印加されると、ハンマ部材は弾性部材の弾
性力に抗して軸部が前記小径部内に侵入しながら
その打撃部が活字部材に向つて磁気駆動し、活字
部材を所望のインパクト力で打撃している。
[Prior Art] For example, a conventional printing hammer device installed in an impact type printer as shown in Japanese Patent Application Laid-Open No. 54-53026 has a large diameter portion that accommodates a coil having a through hole in the center and a support member on the striking side. The striking part of the hammer member is slidably supported with respect to the support member in a case made of a magnetic material and has a small diameter part whose inner diameter is substantially the same as the through hole, and a magnetic material is provided in the through hole. The shaft part of the hammer member is accommodated. This hammer member is always urged toward the non-striking side by the elastic force of the elastic member. When an excitation current is applied to the coil, the hammer member's shaft portion enters the small diameter portion against the elastic force of the elastic member, and its striking portion magnetically drives the type member toward the type member. Hitting with the desired impact force.

[考案が解決しようとする問題点] 然し乍、上記した従来の印字ハンマ装置は、印
字ハンマの打撃部が活字部材と対向していないと
き或いは打撃部と活字部材との間隔が所要の距離
以上に離間している状態でハンマ部材が磁気駆動
されると、ハンマ部材はその軸部が小径部内に侵
入して弾性部材を最大限に圧縮した後に支持部材
に衝突していた。このため、プラテンに対する打
撃部の衝突によりプラテンを破損したり支持部材
の破損或いは変形により該支持部材に対する打撃
部の摺動抵抗が大きくなつて活字部材を所要のイ
ンパクト力にて打撃出来ない問題を有していた。
また、ケースの小径部に対し支持部材が接着或い
は圧入等により固定されているが、軸部との衝突
により小径部から支持部材が外れる問題をも有し
ていた。
[Problems to be Solved by the Invention] However, the above-described conventional printing hammer device cannot be used when the striking part of the printing hammer does not face the type member, or when the distance between the striking part and the type member is greater than the required distance. When the hammer member was magnetically driven in a state where they were separated from each other, the shaft portion of the hammer member entered the small diameter portion and compressed the elastic member to the maximum extent, and then collided with the support member. For this reason, the platen may be damaged due to a collision of the striking part with the platen, or the sliding resistance of the striking part against the supporting member may increase due to damage or deformation of the supporting member, causing the problem that the type member cannot be struck with the required impact force. had.
Further, although the support member is fixed to the small diameter portion of the case by adhesive or press-fitting, there is also a problem in that the support member comes off from the small diameter portion due to collision with the shaft portion.

[考案の目的] 本考案の目的は、上記した従来の欠点に鑑み、
ハンマ部材が活字部材を打撃するのに必要な所定
距離以上に移動するのを規制し、長期に亘つて活
字部材を所要のインパクト力にて打撃することが
可能なプリンタを提供することにある。
[Purpose of the invention] In view of the above-mentioned conventional drawbacks, the purpose of the invention is to
To provide a printer capable of hitting a type member with a required impact force over a long period of time by restricting a hammer member from moving beyond a predetermined distance necessary for striking a type member.

[問題点を解決するための手段] このため本考案は、ハンマ部材を軸線方向へ駆
動するためのコイルを内部に固定したケース大径
部を有するケースを有し、そのケースは前記ケー
ス大径部のプラテン側縁部に、中央部に前記コイ
ルの貫通孔と連通する開口を有するとともにその
開口周縁にて前記ハンマ部材と当接しうるストツ
パー部が一体形成され、前記ハンマ部材の軸部は
前記打撃部側の端部に前記ストツパー部の開口よ
りも小さい径で、その開口内へ侵入可能な小径部
と、その小径部に連続して非打撃部側に、前記ス
トツパー部の開口よりも大きい径の大径部とを有
し、前記ハンマ部材は前記コイルの励磁に基づい
て磁気駆動され、前記小径部が開口内に侵入した
後で前記大径部が前記ストツパー部に当接する前
に前記活字部材を打撃し、前記活字部材が印字位
置にないときに前記ハンマ部材が移動したとき、
前記大径部が前記ストツパー部に当接してハンマ
部材がプラテンを打撃しない位置で停止するよう
に構成している。
[Means for Solving the Problems] Therefore, the present invention has a case having a case large diameter portion in which a coil for driving the hammer member in the axial direction is fixed, and the case has a case large diameter portion. A stopper portion having an opening communicating with the through-hole of the coil in the center and capable of coming into contact with the hammer member at the periphery of the opening is integrally formed on the platen side edge of the portion, and the shaft portion of the hammer member a small diameter part on the striking part side end having a smaller diameter than the opening of the stopper part and capable of penetrating into the opening; and a small diameter part continuous with the small diameter part on the non-striking part side, larger than the opening of the stopper part. the hammer member has a large diameter portion, and the hammer member is magnetically driven based on the excitation of the coil, and after the small diameter portion enters the opening and before the large diameter portion abuts the stopper portion, the hammer member is magnetically driven based on the excitation of the coil; When the hammer member moves when the type member is struck and the type member is not in the printing position,
The large diameter portion is configured to abut against the stopper portion and stop at a position where the hammer member does not strike the platen.

[考案の作用] 本考案は上記のように構成されるため、打撃部
とプラテンとの間に活字部材が介在しているとき
にコイルが励磁されると、ハンマ部材が活字部材
側へ励磁駆動され、ハンマ部材の小径部が開口内
に侵入した後で、前記大径部が前記ストツパー部
に当接する前に前記活字部を打撃し、前記活字部
が印字位置にないときに前記ハンマ部材が移動し
たとき、前記大径部が前記ストツパー部に当接し
てプラテンを打撃しない位置で停止するように規
制している。これにより印字ハンマ装置の破損を
回避し、長期に亘つて活字部材を所要のインパク
ト力にて打撃して印字することが出来る。
[Operation of the device] Since the present invention is configured as described above, when the coil is excited when the type member is interposed between the striking part and the platen, the hammer member is excited and driven toward the type member. After the small diameter part of the hammer member enters the opening, the large diameter part hits the type part before it comes into contact with the stopper part, and when the type part is not in the printing position, the hammer member When moving, the large diameter portion is regulated to stop at a position where it does not come into contact with the stopper portion and strike the platen. This avoids damage to the printing hammer device and allows printing by striking the type member with the required impact force over a long period of time.

[実施例] 以下、本考案の一実施例を図面に従つて説明す
る。
[Example] An example of the present invention will be described below with reference to the drawings.

第1図は、本考案に係るプリンタの概略を示す
斜視図であり、プリンタ1のフレーム(図示せ
ず)間にはプラテン3が回転可能に支持されてい
る。該プラテン3にはDCモータ、ステツプモー
タ等のプラテン駆動モータ(図示せず)が連結さ
れ、該モータの駆動によりプラテン3が所要の方
向へ回転し、該プラテン3に支持された印字用紙
5を給送している。前記フレーム間には2本のガ
イド軸7が前記プラテン3の軸線と平行に横架さ
れている。該ガイド軸7にはキヤリツジ9がガイ
ド軸7の軸線方向へ摺動可能に支持されている。
該キヤリツジ9にはDCモータ、ステツプモータ
等のキヤリツジ駆動モータ(図示せず)が連結さ
れ、該モータの駆動によりキヤリツジ9がプラテ
ン3と平行にガイド軸7の軸線方向へ一文字分ず
つ歩進移動される。前記キヤリツジ9には活字選
択用のステツプモータ11が載置されている。そ
して該ステツプモータ11の回転軸11aには活
字ホイール13が着脱可能に取付けられている。
該活字ホイール13は回転軸11aが連結される
ハブ部13aと、該ハブ部13aの放射方向へ延
びる多数のスポーク部13bと、各スポーク部1
3bの先端に設けられた活字部材13cとが合成
樹脂により一体成形されている。前記ステツプモ
ータ11には印字ハンマ装置15が、後述するハ
ンマ部材31の打撃部33と前記活字部材13c
とが所要の間隔をおいて対向するようにステー1
6を介して取付けられている。前記キヤリツジ9
上にはリボンカセツト(図示せず)が変換可能に
取付けられている。このリボンカセツトには印字
リボン(図示せず)が折畳収容され、該印字リボ
ンはリボンカセツトの両腕部間にて前記プラテン
3と活字部材13cとの間に位置するように張設
されている。
FIG. 1 is a perspective view schematically showing a printer according to the present invention, in which a platen 3 is rotatably supported between frames (not shown) of the printer 1. As shown in FIG. A platen drive motor (not shown) such as a DC motor or a step motor is connected to the platen 3, and the drive of the motor rotates the platen 3 in a desired direction to rotate the printing paper 5 supported by the platen 3. It is being shipped. Two guide shafts 7 are horizontally suspended between the frames parallel to the axis of the platen 3. A carriage 9 is supported on the guide shaft 7 so as to be slidable in the axial direction of the guide shaft 7.
A carriage drive motor (not shown) such as a DC motor or a step motor is connected to the carriage 9, and the carriage 9 moves in parallel with the platen 3 one character at a time in the axial direction of the guide shaft 7 by driving the motor. be done. A step motor 11 for character selection is mounted on the carriage 9. A type wheel 13 is detachably attached to the rotating shaft 11a of the step motor 11.
The type wheel 13 includes a hub portion 13a to which a rotating shaft 11a is connected, a number of spoke portions 13b extending in the radial direction of the hub portion 13a, and each spoke portion 1.
3b and a type member 13c provided at the tip thereof are integrally molded from synthetic resin. The step motor 11 includes a printing hammer device 15 that connects a striking portion 33 of a hammer member 31 (to be described later) and the type member 13c.
Place the stay 1 so that they face each other with the required interval.
It is attached via 6. Said carriage 9
A ribbon cassette (not shown) is convertably mounted on top. A printing ribbon (not shown) is folded and accommodated in this ribbon cassette, and the printing ribbon is stretched between both arms of the ribbon cassette so as to be positioned between the platen 3 and the type member 13c. There is.

第2図は印字ハンマ装置15の中央横断面図で
あり、印字ハンマ装置15のケース17は磁性体
製であり、第2図に示すように段付の円筒形状に
形成され、小径部17aと大径部17bと、これ
ら小径部17aおよび大径17bを連結するスト
ツパー部17cとより構成されている。このスト
ツパー部17cは大径部17bとともに磁路の一
部を形成するとともに、後述するハンマ部材31
の移動量を規制するためのストツパーとして作用
する。そして前記小径部17aと大径部17bと
はストツパー部17cの開口18を介して連通し
ている。前記ケース17の大径部17bにはコイ
ルボビン19が圧入固定されている。該コイルボ
ビン19の中心部には貫通孔19aが、後述する
ハンマ部材31の軸部35に応じた内径でかつス
トツパー部17cの開口18よりも大きい径に形
成されている。また、コイルボビン19の外周に
はコイル巻回部19bが設けられ、該コイル巻回
部19bの前後両端部には対向する一対の鍔部1
9cが一体形成されている。そして前記コイル巻
回部19bにはコイル21が巻回されている。
FIG. 2 is a central cross-sectional view of the printing hammer device 15. The case 17 of the printing hammer device 15 is made of a magnetic material, and is formed into a stepped cylindrical shape as shown in FIG. It is composed of a large diameter portion 17b and a stopper portion 17c that connects the small diameter portion 17a and the large diameter 17b. This stopper portion 17c forms a part of a magnetic path together with the large diameter portion 17b, and also forms a part of a hammer member 31 which will be described later.
Acts as a stopper to restrict the amount of movement. The small diameter portion 17a and the large diameter portion 17b communicate with each other through an opening 18 of the stopper portion 17c. A coil bobbin 19 is press-fitted into the large diameter portion 17b of the case 17. A through hole 19a is formed in the center of the coil bobbin 19 with an inner diameter corresponding to a shaft portion 35 of a hammer member 31, which will be described later, and a diameter larger than the opening 18 of the stopper portion 17c. Further, a coil winding part 19b is provided on the outer periphery of the coil bobbin 19, and a pair of opposing collar parts 1 are provided at both front and rear ends of the coil winding part 19b.
9c is integrally formed. A coil 21 is wound around the coil winding portion 19b.

前記ケース17の大径部17b内にはヨーク2
3が、コイルボビン19の後端側(非打撃側)に
て圧入固定されている。このヨーク23の中心部
には透孔23aが、前記貫通孔19aとほぼ一致
し、ハンマ部材31の軸部35が挿通可能に形成
されている。このヨーク23はコイル21に励磁
電流が印加されたときに発生する磁束がハンマ部
材31に至る磁気回路を形成している。ケース1
7の大径部17b内にはハウジング25がヨーク
23の後端側(非打撃側)にて圧入固定されてい
る。このハウジング25の中心部には透孔25a
が形成され、該透孔25a内には中心部に前記透
孔23aとほぼ一致する軸支孔27aを有する合
成樹脂製の軸受部材27が圧入固定されている。
この軸受部材27は軸支孔27a内を挿通する軸
部35を摺動可能に支持している。前記ケース1
7の小径部17aの打撃側には合成樹脂製の支持
部材29が圧入固定されている。この支持部材2
9の中心部には支持孔29aが形成され、この支
持孔29aにはハンマ部材31の打撃部33が摺
動可能に支持されている。そして前記軸受部材2
7と支持部材29との間にはハンマ部材31が軸
線方向へ移動可能に支持されている。このハンマ
部材31は磁性体製にて、活字部材13cを打撃
する打撃部33と、磁気回路を形成する軸部35
とが一体形成されている。そして前記軸部35の
打撃側には前記開口18より径が僅かに小さい小
径部35aが軸線方向に向つて所要の距離lにて
形成され、さらにその非打撃部側に隣接して前記
開口18より大きい径の大径部35bが前記スト
ツパー部17cと当接可能に形成されている。こ
の距離lはハンマ部材31が磁気駆動されたと
き、打撃部33の打撃端面がプラテン3に、また
軸部35の打撃側が支持部材29に夫々衝突しな
い距離に設定されている。前記支持部材29と小
径部35aとの間には弾性部材としての復帰ばね
37が装着されている。この復帰ばね37は支持
部材29側が小径部35a側より大径状の円錘形
に巻回され、その弾性力によりハンマ部材31を
常に第2図に示す初期位置に付勢している。
A yoke 2 is disposed within the large diameter portion 17b of the case 17.
3 is press-fitted and fixed at the rear end side (non-striking side) of the coil bobbin 19. A through hole 23a is formed in the center of the yoke 23, substantially coinciding with the through hole 19a, through which the shaft portion 35 of the hammer member 31 can be inserted. The yoke 23 forms a magnetic circuit in which a magnetic flux generated when an excitation current is applied to the coil 21 reaches the hammer member 31. Case 1
A housing 25 is press-fitted into the large diameter portion 17b of the yoke 23 at the rear end side (non-impact side). A through hole 25a is provided in the center of this housing 25.
A bearing member 27 made of synthetic resin is press-fitted into the through-hole 25a and has a shaft support hole 27a in the center that substantially coincides with the through-hole 23a.
This bearing member 27 slidably supports a shaft portion 35 that is inserted through the shaft support hole 27a. Said case 1
A support member 29 made of synthetic resin is press-fitted and fixed to the impact side of the small diameter portion 17a of No.7. This support member 2
A support hole 29a is formed in the center of the hammer member 9, and the striking portion 33 of the hammer member 31 is slidably supported in the support hole 29a. and the bearing member 2
A hammer member 31 is supported between 7 and the support member 29 so as to be movable in the axial direction. This hammer member 31 is made of a magnetic material, and includes a striking part 33 that strikes the type member 13c, and a shaft part 35 that forms a magnetic circuit.
are integrally formed. A small diameter portion 35a having a diameter slightly smaller than the opening 18 is formed on the impact side of the shaft portion 35 at a required distance l in the axial direction, and further adjacent to the non-impact side of the opening 18. A large diameter portion 35b having a larger diameter is formed so as to be able to come into contact with the stopper portion 17c. This distance l is set to a distance that does not cause the striking end face of the striking part 33 to collide with the platen 3 and the striking side of the shaft part 35 to not collide with the support member 29, respectively, when the hammer member 31 is magnetically driven. A return spring 37 as an elastic member is installed between the support member 29 and the small diameter portion 35a. The return spring 37 is wound in a conical shape with the support member 29 side having a larger diameter than the small diameter portion 35a side, and its elastic force always urges the hammer member 31 to the initial position shown in FIG. 2.

前記ハウジング25の非打撃側には左右一対の
支持軸39が、ハウジング25の中心から同心円
位置にて対向するように固着されている。この支
持軸39は軸部39aと、該軸部39aより大き
い径の頭部39bとから形成されている。そして
前記軸部39aにはハンマ受け41が、支持穴4
1aを介して支持軸39の軸線方向へ移動可能に
支持されている。このハンマ受け41は復帰ばね
37の弾性力によるハンマ部材31の復帰エネル
ギーを効果的に吸収するのに充分な重量を有し、
打撃側の中央部に軸部35の非打撃側端部が侵入
可能な凹所41bを有したカツプ状に形成されて
いる。ハンマ受け41と支持軸39の頭部39b
との間には圧縮ばね43が装着されている。この
圧縮ばね43はその弾性力により前記ハンマ受け
41をハウジング25側へ付勢している。尚、図
中45は凹所41b内に圧入固定された合成樹脂
製の衝突板、47はハウジング25とハンマ受け
41との間に取付けられたゴム等の弾性板であ
る。
A pair of left and right support shafts 39 are fixed to the non-impacting side of the housing 25 so as to face each other and are concentrically arranged from the center of the housing 25 . This support shaft 39 is formed from a shaft portion 39a and a head portion 39b having a larger diameter than the shaft portion 39a. A hammer receiver 41 is provided in the shaft portion 39a, and a support hole 4 is provided in the shaft portion 39a.
It is supported so as to be movable in the axial direction of the support shaft 39 via 1a. This hammer receiver 41 has sufficient weight to effectively absorb the return energy of the hammer member 31 due to the elastic force of the return spring 37,
It is formed into a cup shape with a recess 41b into which the non-striking side end of the shaft portion 35 can enter at the center portion on the striking side. Hammer receiver 41 and head 39b of support shaft 39
A compression spring 43 is installed between the two. The compression spring 43 urges the hammer receiver 41 toward the housing 25 by its elastic force. In the figure, 45 is a synthetic resin collision plate press-fitted into the recess 41b, and 47 is an elastic plate made of rubber or the like installed between the housing 25 and the hammer receiver 41.

次に上記のように構成された印字ハンマ装置1
5の作用を第2図乃至第6図に従つて説明する。
Next, the printing hammer device 1 configured as described above
5 will be explained with reference to FIGS. 2 to 6.

第2図において、ハンマ部材31は、通常復帰
ばね37の弾性力により第2図に示す初期位置に
移動されている。また、ハンマ受け41は圧縮ば
ね43の弾性力によりハウジング25側に付勢さ
れている。この状態にてハンマ部材31における
軸部35の非打撃側端部は凹所41b内に侵入し
て衝突板45に当接している。
In FIG. 2, the hammer member 31 has been moved to the initial position shown in FIG. 2 by the elastic force of the normal return spring 37. Further, the hammer receiver 41 is urged toward the housing 25 by the elastic force of the compression spring 43. In this state, the non-impact side end of the shaft portion 35 of the hammer member 31 enters into the recess 41b and comes into contact with the collision plate 45.

コイル21に印加される励磁電流、ハンマ部材
31の移動距離及びハンマ部材31の移動速度と
の関係を示す第3図A〜C、励磁電流の印加中断
時におけるハンマ部材31の移動状態を示す第4
図及びハンマ部材31による活字部材13cの打
撃状態を示す第5図において、第3図Aに示す励
磁電流がコイル21に印加されはじめると、ケー
ス17とヨーク23及びハンマ部材31の間に形
成される磁気回路に基づいて磁界が発生し、該磁
界によりハンマ部材31の小径部35aが復帰ば
ね37の弾性力に抗しながら第2図に示す右方向
へ磁気吸引され始める。そして第4図に示すよう
に、ハンマ部材31が活字部材13c側へ所要の
距離移動してその小径部35aがストツパー部1
7cの開口18内に侵入しはじめる直前に達した
とき、コイル21に対する励磁電流の印加が中断
される。この時点を第3図A,B,Cに破線で示
す。このとき、励磁電流の印加中断に伴つてコイ
ル21には逆起電流が発生するため、第3図Cに
示すように励磁電流の印加中断後においてもハン
マ部材31の移動速度が増大している。これによ
りハンマ部材31はさらに慣性力により復帰ばね
37の弾性力に抗しながら打撃部33が活字部材
13cに向かつて移動される。そして第5図に示
すように、小径部17a内に軸部35の小径部3
5aが侵入して活字部材13cに対するハンマ部
材31の移動が許容されるため、ハンマ部材31
の打撃部33は活字部材13cを所要のインパク
ト力にて打撃し、該活字部材13cに応じた文字
が印字用紙5に印字される。この時点は第3図B
の曲線頂部に相当する。このとき、プラテン3と
打撃部33の打撃端面との間には活字部材13c
が介在しているため、ハンマ部材31は所要の距
離以上に移動するのが規制されている。また、ハ
ンマ部材31の大径部35bはストツパー部17
cと僅かに間隔をあけて停止し、ストツパー部1
7cとの当接が回避されている。
FIGS. 3A to 3C show the relationship between the excitation current applied to the coil 21, the moving distance of the hammer member 31, and the moving speed of the hammer member 31, and FIG. 4
In FIG. 5 showing the striking state of the type member 13c by the hammer member 31, when the excitation current shown in FIG. A magnetic field is generated based on the magnetic circuit, and the small diameter portion 35a of the hammer member 31 begins to be magnetically attracted to the right in FIG. 2 while resisting the elastic force of the return spring 37. Then, as shown in FIG. 4, the hammer member 31 moves a required distance toward the type member 13c, and the small diameter portion 35a of the hammer member 31 moves toward the stopper portion 13c.
Immediately before the coil 21 begins to enter the opening 18 of the coil 21, the application of the excitation current to the coil 21 is interrupted. This point is indicated by broken lines in FIGS. 3A, B, and C. At this time, since a back electromotive current is generated in the coil 21 due to the interruption of the application of the exciting current, the moving speed of the hammer member 31 increases even after the application of the exciting current is interrupted, as shown in FIG. 3C. . As a result, the hammer member 31 further moves the striking portion 33 toward the type member 13c while resisting the elastic force of the return spring 37 due to inertia force. As shown in FIG. 5, the small diameter portion 3 of the shaft portion 35 is inserted into the small diameter portion 17a.
5a enters and allows the hammer member 31 to move relative to the type member 13c.
The striking portion 33 strikes the type member 13c with a required impact force, and characters corresponding to the type member 13c are printed on the printing paper 5. At this point, Figure 3B
corresponds to the top of the curve. At this time, there is a type member 13c between the platen 3 and the striking end surface of the striking part 33.
is present, the hammer member 31 is restricted from moving beyond a required distance. Further, the large diameter portion 35b of the hammer member 31 is connected to the stopper portion 17.
c, and stop with a slight distance from the stopper part 1.
Contact with 7c is avoided.

上記打撃動作後、ハンマ部材31は復帰ばね3
7の弾性力により第2図に示す非打撃方向側へ復
帰される。そして軸部35の非打撃側端部が凹所
41b内に侵入してハンマ受け41と衝突し、該
ハンマ受け41を圧縮ばね43の弾性力に抗しな
がら支持軸39の軸線方向へ移動させる。これに
よりハンマ受け41の重量及び圧縮ばね43の弾
性によりハンマ部材31の復帰エネルギーを吸収
した後、圧縮ばね43の弾性力によりハンマ受け
41が弾性板47に当接するまで復動し、ハンマ
部材31を第2図に示す初期位置に安定させる。
After the above-mentioned striking operation, the hammer member 31 returns to the return spring 3.
The elastic force of 7 returns it to the non-striking direction side shown in FIG. Then, the non-striking end of the shaft portion 35 enters the recess 41b and collides with the hammer receiver 41, causing the hammer receiver 41 to move in the axial direction of the support shaft 39 while resisting the elastic force of the compression spring 43. . As a result, after the return energy of the hammer member 31 is absorbed by the weight of the hammer receiver 41 and the elasticity of the compression spring 43, the hammer receiver 41 moves back until it comes into contact with the elastic plate 47 due to the elastic force of the compression spring 43, and the hammer member 31 is stabilized in the initial position shown in FIG.

印字ハンマ装置15の空打ち状態を示す第6図
において、回転軸11aに活字ホイール13が装
着されていないとき、打撃部33と対向する活字
部材13cのスポーク部13bが切損していると
き或いは活字部材13cの相互間に打撃部33が
対向位置しているとき等、打撃部33の打撃側端
面とプラテン3との間に活字部材13cが対向位
置していない状態でコイル21に励磁電流が印加
されると、前述した動作と同様にコイル21の励
磁に伴つてハンマ部材31は復帰ばね37の弾性
力に抗しながら小径部17a内に軸部35の小径
部35aが侵入し、第6図に示す実線矢印方向へ
移動される。そして打撃部33とプラテン3との
間に活字部材13cが介在していないため、ハン
マ部材31は第5図に示す状態により更に長い距
離にてプラテン3側へ移動される。このとき、小
径部17a内に対する小径部35aの侵入に伴つ
て大径部35bがストツパー部17cに当接する
ため、ハンマ部材31がプラテン3側に向つて所
要の距離以上に移動するのが規制される。これに
より打撃部33がプラテン3を打撃したり或いは
小径部35aが支持部材29に衝突することが回
避される。
In FIG. 6, which shows the blank firing state of the printing hammer device 15, when the type wheel 13 is not attached to the rotating shaft 11a, when the spoke part 13b of the type member 13c facing the striking part 33 is broken, or when the type An excitation current is applied to the coil 21 in a state where the type member 13c is not located between the striking side end surface of the striking part 33 and the platen 3, such as when the striking part 33 is located facing each other between the members 13c. Then, as with the excitation of the coil 21, the small diameter portion 35a of the shaft portion 35 enters the small diameter portion 17a of the hammer member 31 while resisting the elastic force of the return spring 37, similar to the operation described above, and as shown in FIG. It is moved in the direction of the solid line arrow shown in . Since the type member 13c is not interposed between the striking portion 33 and the platen 3, the hammer member 31 is moved a longer distance toward the platen 3 in the state shown in FIG. At this time, as the small diameter part 35a enters into the small diameter part 17a, the large diameter part 35b comes into contact with the stopper part 17c, so that the hammer member 31 is prevented from moving beyond the required distance toward the platen 3. Ru. This prevents the striking portion 33 from striking the platen 3 or the small diameter portion 35a from colliding with the support member 29.

このように本実施例は、打撃部33の打撃端面
とプラテン3との間に活字部材13cが介在して
いない状態にてハンマ部材31が磁気駆動された
とき、大径部35bがストツパー部17cに当接
してハンマ部材31が所要の距離以上に移動する
ことが規制されるため、打撃部33がプラテン3
を打撃したり或いは小径部17a内に侵入した小
径部35aが復帰ばね37を最大に圧縮変形した
後に支持部材29と衝突したりすることを回避
し、プラテン3の破損或いは支持部材29の変形
等を防止することが可能である。
In this way, in this embodiment, when the hammer member 31 is magnetically driven in a state where the type member 13c is not interposed between the striking end surface of the striking part 33 and the platen 3, the large diameter part 35b is moved to the stopper part 17c. Since the hammer member 31 is prevented from moving beyond a required distance by contacting the platen 3, the striking portion 33 is
This prevents damage to the platen 3, deformation of the support member 29, etc. It is possible to prevent this.

[考案の効果] このように本考案は、ハンマ部材が活字部材を
打撃するのに必要な所定距離以上に移動するのを
規制し、長期に亘つて活字部材を所要のインパク
ト力にて打撃することが可能なプリンタを提供す
ることが可能である。
[Effects of the invention] As described above, the present invention prevents the hammer member from moving beyond a predetermined distance necessary to strike the type member, and allows the hammer member to strike the type member with the required impact force over a long period of time. It is possible to provide a printer that can.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はプリンタの概略を示す斜視図、第2図
は印字ハンマ装置の中央横断面図、第3図乃至第
6図は印字ハンマ装置の作用を説明する説明図で
ある。 図中1はプリンタ、3はプラテン、5は印字用
紙、13cは活字部材、15は印字ハンマ装置、
17はケース、17aは小径部、17bは大径
部、17cはストツパー部、18は開口、19a
は貫通孔、21はコイル、23aは貫通孔、31
はハンマ部材、33は打撃部、35は軸部、35
aは小径部、35bは大径部、37は弾性部材と
しての復帰バネ、lは距離である。
FIG. 1 is a perspective view showing the outline of the printer, FIG. 2 is a central cross-sectional view of the printing hammer device, and FIGS. 3 to 6 are explanatory diagrams illustrating the operation of the printing hammer device. In the figure, 1 is a printer, 3 is a platen, 5 is printing paper, 13c is a type member, 15 is a printing hammer device,
17 is a case, 17a is a small diameter part, 17b is a large diameter part, 17c is a stopper part, 18 is an opening, 19a
is a through hole, 21 is a coil, 23a is a through hole, 31
3 is a hammer member, 33 is a striking portion, 35 is a shaft portion, 35
a is a small diameter portion, 35b is a large diameter portion, 37 is a return spring as an elastic member, and l is a distance.

Claims (1)

【実用新案登録請求の範囲】 1 印字用紙を支持するプラテンと、 前記印字用紙に対向配置された活字部材と、 その活字部材を印字位置において印字用紙に
向けて打撃する打撃部及び磁性体製の軸部を有
するハンマ部材と、 そのハンマ部材を軸線方向へ移動可能に収容
するための貫通孔を有するとともに励磁電流が
印加されたとき、前記ハンマ部材を打撃位置に
向つて移動させるコイルと、 前記コイルを内部に固定したケース大径部を
有するとともに、そのコイルに励磁電流が印加
されたとき前記ハンマ部材の軸部とともに磁路
を形成する磁性体製のケースと、 そのケースに一端が支持され、前記ハンマ部
材を非打撃位置に向つて付勢する弾性部材と、 を備えるプリンタにおいて、 前記ケースは前記ケース大径部のプラテン側
縁部に、中央部に前記コイルの貫通孔と連通す
る開口を有するとともにその開口周縁にて前記
ハンマ部材を当接しうるストツパー部が一体形
成され、 前記ハンマ部材の軸部は前記打撃部側の端部
に前記ストツパー部の開口よりも小さい径で、
その開口内へ侵入可能な小径部と、その小径部
に連続して非打撃部側に、前記ストツパー部の
開口よりも大きい径の大径部とを有し、 前記ハンマ部材は前記コイルの励磁に基づい
て磁気駆動され、前記小径部が開口内に侵入し
た後で前記大径部が前記ストツパー部に当接す
る前に前記活字部材を打撃し、 前記活字部材が印字位置にないときに前記ハ
ンマ部材が移動したとき、前記大径部が前記ス
トツパー部に当接してハンマ部材がプラテンを
打撃しない位置で停止するように構成したこと
を特徴とするプリンタ。 2 前記コイルは、前記ハンマ部材の小径部が前
記ストツパー板の開口内に侵入しはじめる直前
まで励磁され、その後前記ハンマ部材は慣性で
移動を継続する実用新案登録請求の範囲第1項
に記載のプリンタ。
[Claims for Utility Model Registration] 1. A platen that supports printing paper, a type member disposed opposite to the printing paper, a striking part that hits the type member toward the printing paper at the printing position, and a magnetic member made of a magnetic material. a hammer member having a shaft portion; a coil having a through hole for accommodating the hammer member so as to be movable in an axial direction and moving the hammer member toward a striking position when an excitation current is applied; A case made of a magnetic material, which has a large diameter part in which a coil is fixed, and which forms a magnetic path together with the shaft of the hammer member when an excitation current is applied to the coil, and one end of which is supported by the case. , an elastic member that biases the hammer member toward a non-striking position, and the case has an opening on the platen side edge of the large diameter portion of the case, and an opening that communicates with the through hole of the coil in the center portion. and a stopper part that can abut the hammer member at the periphery of the opening thereof is integrally formed, and the shaft part of the hammer member has a diameter smaller than the opening of the stopper part at the end on the striking part side,
The hammer member has a small diameter portion that can enter into the opening, and a large diameter portion that is continuous with the small diameter portion and has a larger diameter than the opening of the stopper portion on the non-impacting portion side, and the hammer member is configured to excite the coil. and strikes the type member after the small diameter portion enters the opening and before the large diameter portion abuts the stopper portion, and when the type member is not in the printing position, the hammer A printer characterized in that, when the member moves, the large diameter portion comes into contact with the stopper portion and the hammer member stops at a position where it does not strike the platen. 2. The coil is energized until just before the small diameter portion of the hammer member begins to enter the opening of the stopper plate, and thereafter the hammer member continues to move due to inertia. printer.
JP1985172804U 1985-11-07 1985-11-07 Expired - Lifetime JPH0547652Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985172804U JPH0547652Y2 (en) 1985-11-07 1985-11-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985172804U JPH0547652Y2 (en) 1985-11-07 1985-11-07

Publications (2)

Publication Number Publication Date
JPS6280644U JPS6280644U (en) 1987-05-23
JPH0547652Y2 true JPH0547652Y2 (en) 1993-12-15

Family

ID=31109674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985172804U Expired - Lifetime JPH0547652Y2 (en) 1985-11-07 1985-11-07

Country Status (1)

Country Link
JP (1) JPH0547652Y2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153919A (en) * 1974-11-07 1976-05-12 Nippon Electric Co Shiriarupurintaano injihanmaakiko
JPS5355228A (en) * 1976-10-28 1978-05-19 Tokyo Electric Co Ltd Method of detecting breakage of printing head marking portion
JPS5453026A (en) * 1977-09-14 1979-04-26 Exxon Research Engineering Co Impulsive printer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52149718U (en) * 1976-05-10 1977-11-14

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153919A (en) * 1974-11-07 1976-05-12 Nippon Electric Co Shiriarupurintaano injihanmaakiko
JPS5355228A (en) * 1976-10-28 1978-05-19 Tokyo Electric Co Ltd Method of detecting breakage of printing head marking portion
JPS5453026A (en) * 1977-09-14 1979-04-26 Exxon Research Engineering Co Impulsive printer

Also Published As

Publication number Publication date
JPS6280644U (en) 1987-05-23

Similar Documents

Publication Publication Date Title
EP0156547A1 (en) Dot printer head
JPH0547652Y2 (en)
KR880008885A (en) Printhead with single piece armature
US4269117A (en) Electro-magnetic print hammer
JPH0742742Y2 (en) Dot print head
JPH0118363Y2 (en)
JP2788867B2 (en) Printing actuator
JPH0318588B2 (en)
JP2730277B2 (en) Print head for dot impact printer
JPS6325162Y2 (en)
JPH0335555Y2 (en)
JPH051411Y2 (en)
JPH0428775Y2 (en)
JPH0434040Y2 (en)
JP2926948B2 (en) Print head
EP0338514A2 (en) Low-noise printer head assembly
JPS625866A (en) Printer for typewriter, etc.
JPS6356071B2 (en)
JPH0536690Y2 (en)
US4362405A (en) Moving coil type printing head
JPH0551465B2 (en)
JPH0314371Y2 (en)
JPH0425340Y2 (en)
JPH0422646A (en) Impact printer head
JPH0647727Y2 (en) Dot printer print head actuator