JPS63312159A - Printing head - Google Patents

Printing head

Info

Publication number
JPS63312159A
JPS63312159A JP14758387A JP14758387A JPS63312159A JP S63312159 A JPS63312159 A JP S63312159A JP 14758387 A JP14758387 A JP 14758387A JP 14758387 A JP14758387 A JP 14758387A JP S63312159 A JPS63312159 A JP S63312159A
Authority
JP
Japan
Prior art keywords
armature
leaf spring
wire
stopper
laser
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
Application number
JP14758387A
Other languages
Japanese (ja)
Other versions
JPH0722996B2 (en
Inventor
Hidehiko Inoguchi
英彦 猪口
Hiroshi Tominaga
冨永　浩志
Toshimi Hattori
服部　俊美
Hironori Kinoshita
博宣 木下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62147583A priority Critical patent/JPH0722996B2/en
Publication of JPS63312159A publication Critical patent/JPS63312159A/en
Publication of JPH0722996B2 publication Critical patent/JPH0722996B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/27—Actuators for print wires
    • B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control

Landscapes

  • Impact Printers (AREA)

Abstract

PURPOSE:To prevent a laser-welded part from being separated out of place or cracks from generating on an area near a laser-welded part of leaf spring by providing a stopper which restricts the rotation of the rear end of an armature. CONSTITUTION:When wire 7 contacts a printing medium, a stopper 11a is contacted by an armature 6 immediately after leaf spring 5 touches a side yoke 9 by rotation of the armature 6 centering around the vicinity of a junctioned part between the wire 7 and the armature 6 under the inertia effect of the armature 6. Under this constitution, the magnetic flux of a magnet 3 is canceled by energization of a coil 2, and a leaf spring 5 is separated from a base yoke 1 by the elastic force of the leaf spring 5, causing the wire 7 to move toward a printing medium and contact the latter for printing. When the wire 7 touches the printing medium, a separation force which works between the armature 6 and the leaf spring 5 decreases because the rotation of the rear end of the armature is restricted by a stopper 11b. Subsequently the possibilities of the laser-welded part being separated out of place or cracks generating near the laser-welded part of the leaf spring are reduced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、印字装置等に用いられる印字ヘッドに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a print head used in a printing device or the like.

従来の技術 従来からプリンター等に用いられる印字ヘッドは、大別
してクラッパ−型とバネチャージ型がある。近年、印字
速度の高速化に伴いバネチャージ型が多用されてきてい
る。2. Description of the Related Art Print heads conventionally used in printers and the like can be roughly divided into clapper-type and spring-charged types. In recent years, spring-charged printers have come into widespread use as printing speeds have increased.

以下、従来の印字ヘッドについて説明する。A conventional print head will be explained below.

第２図は従来のバネチャージ型の印字ヘッドの半断面図
であり、１はベースヨーク、２はコイル、３はマグネッ
ト、４は補助ヨークであり、ベースヨーク１、コイル２
、マグネット３及び補助ヨーク４は一体に接着されてい
る。５は板はね、６は板はね５にレーザー溶接されたア
ーマチュア、７はアーマチュア６の一端（以下、先端と
略称し、また他端を後端と略称する。）に取り付けられ
たワイヤー、８はワイヤー７の先端を案内する先端ガイ
ド、９は補助ヨーク４と共に板はね５をはさみ込んで固
定するとともに、アーマチュア６を取り囲むよう構成さ
れ、アーマチュア６、板はね５、ベースヨーク１、マグ
ネット３及び補助ヨーク４と共に磁路を形成するサイド
ヨーク、ｌＯは先端ガイド８を支持すると共にアーマチ
ュア６のストッパー１０ａを有するノーズである。Figure 2 is a half-sectional view of a conventional spring-charged print head, in which 1 is a base yoke, 2 is a coil, 3 is a magnet, and 4 is an auxiliary yoke.
, the magnet 3 and the auxiliary yoke 4 are bonded together. 5 is a plate blade, 6 is an armature laser welded to the plate blade 5, 7 is a wire attached to one end of the armature 6 (hereinafter abbreviated as the tip, and the other end is abbreviated as the rear end); 8 is a tip guide that guides the tip of the wire 7; 9 is configured to sandwich and fix the plate spring 5 together with the auxiliary yoke 4, and surround the armature 6; the armature 6, the plate spring 5, the base yoke 1; A side yoke IO that forms a magnetic path together with the magnet 3 and the auxiliary yoke 4 is a nose that supports the tip guide 8 and has a stopper 10a of the armature 6.

ストッパー１０ａは印字媒体がない状態で印字ヘッドが
駆動された時（以下、空打ち時と略称する。）にワイヤ
ー７及びアーマチュア６の動きを規制することにより、
板はね５が両振りで使用されるのを防ぎ、板はね５の折
損を防止するために設けられている。The stopper 10a restricts the movement of the wire 7 and the armature 6 when the print head is driven without a print medium (hereinafter referred to as "dry printing").
This is provided to prevent the plate spring 5 from being used in both directions and to prevent the plate spring 5 from breaking.

以上のように構成された従来の印字ヘッドについて、以
下その動作について説明する。The operation of the conventional print head configured as described above will be described below.

まずコイル２に通電しない状態では、マグネット３の磁
束がベースヨーク１、板はね５、アーマチュア６、サイ
ドヨーク９、板ばね５、補助ヨーク４を通り、この時ベ
ースヨーク１とアーマチュア６との間に磁気吸引力を生
じるため、板はね５は変形して、ベースヨーク１に接し
ている。First, when the coil 2 is not energized, the magnetic flux of the magnet 3 passes through the base yoke 1, plate spring 5, armature 6, side yoke 9, plate spring 5, and auxiliary yoke 4. Since a magnetic attraction force is generated between them, the plate spring 5 is deformed and is in contact with the base yoke 1.

次にコイル２に通電すると、コイル２の磁束がアーマチ
ュア６とベースヨークｌの空隙において、マグネット３
の磁束を打ち消すため、板はね５の弾性力によって、板
はね５がベースヨーク１がら離れる。この時板はね５と
共にワイヤー７が動き、ワイヤー７が印字媒体に向かっ
て移動し、印字媒体に当接することにより印字を行なう
。Next, when the coil 2 is energized, the magnetic flux of the coil 2 is applied to the magnet 3 in the gap between the armature 6 and the base yoke l.
In order to cancel the magnetic flux, the plate spring 5 separates from the base yoke 1 due to the elastic force of the plate spring 5. At this time, the wire 7 moves together with the plate spring 5, and the wire 7 moves toward the print medium and comes into contact with the print medium, thereby performing printing.

なお、空打ち時にはワイヤー７が印字媒体に当接しない
ため、第３図に示すように瞬間的に板ばね５がサイドヨ
ーク９に当接した状態となる。In addition, since the wire 7 does not come into contact with the print medium during blank printing, the leaf spring 5 momentarily comes into contact with the side yoke 9 as shown in FIG.

発明が解決しようとする問題点 しかしながら上記従来の構成では、ワイヤー７が印字媒
体に当接した時、アーマチュア６の慣性力により、ワイ
ヤー７とアーマチュア６の接合部近傍を中心として回転
し、板ばね５がサイドヨーク９に当接するため、第４図
に示すように、板ばね５はサイドヨーク９より矢印Ａで
示す方向に力を受けるが、この時まだアーマチュア６は
矢印Ｂで示す方向に動こうとするため、板はね５とアー
マチュア６の間にこれらを引き離そうとする力が加わり
、レーザー溶接した部分が外れたり、あるいは板ばねの
レーザー溶接した部分の近傍が割れてしまう場合がある
という問題点を有していた。Problems to be Solved by the Invention However, in the conventional configuration described above, when the wire 7 comes into contact with the print medium, the inertia of the armature 6 causes the wire 7 to rotate around the vicinity of the joint between the wire 7 and the armature 6, and the leaf spring 5 comes into contact with the side yoke 9, the leaf spring 5 receives a force from the side yoke 9 in the direction shown by arrow A, as shown in FIG. As a result, a force is applied between the leaf spring 5 and the armature 6 to separate them, which may cause the laser welded part to come off, or the leaf spring near the laser welded part to crack. It had some problems.

問題点を解決するための手段 本発明は、アーマチュアの後端の駆動を規制するストッ
パーを設けたものである。Means for Solving the Problems The present invention provides a stopper for regulating the drive of the rear end of the armature.

作　　　　用 上記構成により、印字時にストッパーによりアーマチュ
アの駆動が規制されているため、板はねとアーマチュア
の間に働いているこれらを引き離そうとする力が小さく
押えられる。Function: With the above configuration, the drive of the armature is regulated by the stopper during printing, so the force acting between the plate spring and the armature that tends to separate them can be suppressed to a small level.

実　　施　　例 第１図は本発明の一実施例における印字ヘッドの半断面
図であり、１はベースヨーク、２はコイル、３はマグネ
ット、４は補助ヨーク、５は板ばね、６はアーマチュア
、７はワイヤー、８は先端ガイド、９はサイドヨークで
あり、これらは従来例と同様の構成であるため、同一の
番号を付し、説明を省略する。１１は先端ガイド８を支
持しており、アーマチュア６のストッパー１１ａ及びｌ
ｌｂを有するノーズである。ストッパー１１３は従来例
と同様に、印字媒体がない状態で印字ヘッドが駆動され
た時にワイヤー７及びアーマチュア６の動きを規制する
ことにより、板はね５の折損を防止するために設けられ
ている。またストッパー１１ｂは、ワイヤー７が印字媒
体に当接した時、アーマチュア６の慣性力により、ワイ
ヤー７とアーマチュア６の接合部近傍を中心とじてアー
マチュア６が回転し、板はね５がサイドヨー　　　゛り
９に当接したＭｖｉに、アーマチュア６が当接するよう
構成されている。Embodiment FIG. 1 is a half-sectional view of a print head in an embodiment of the present invention, in which 1 is a base yoke, 2 is a coil, 3 is a magnet, 4 is an auxiliary yoke, 5 is a leaf spring, 6 is an armature, 7 is a wire, 8 is a tip guide, and 9 is a side yoke, and since these have the same configuration as the conventional example, they are given the same numbers and their explanation will be omitted. 11 supports the tip guide 8, and the stoppers 11a and l of the armature 6
The nose has a lb. As in the conventional example, the stopper 113 is provided to prevent the plate spring 5 from breaking by regulating the movement of the wire 7 and the armature 6 when the print head is driven without a print medium. . In addition, the stopper 11b is such that when the wire 7 comes into contact with the printing medium, the armature 6 rotates around the joint area between the wire 7 and the armature 6 due to the inertial force of the armature 6, and the plate spring 5 causes side yaw. The armature 6 is configured to abut against the Mvi that abuts on the armature 9.

以上のように構成された本実施例の印字ヘッドについて
、以下その動作について説明する。The operation of the print head of this embodiment configured as described above will be described below.

まずコイル２に通電しない状態では、板はね５は変形し
て、ベースヨーク１に接している。First, when the coil 2 is not energized, the plate spring 5 is deformed and in contact with the base yoke 1.

次にこの状態からコイル２に通電すると、マグネット３
の磁束を打ち消され、板はね５の弾性力によって、板は
ね５がベースヨーク１がら離れ、ワイヤー７が印字媒体
に向かって移動し、印字媒体に当接することにより印字
が行なわれる。この時、ワイヤー７が印字媒体に当接し
た時、アーマチュア６は先端近傍を中心に駆動し、板ば
ね５がサイドヨーク９に当接した後も駆動しようとする
が、ストッパー１１ｂによりアーマチュア６の後端の駆
動が規制されているため、アーマチュア６と板はね５の
間に働く引き離す力が減る。このためレーザー溶接した
部分の外れや、あるいは板ばねのレーザー溶接した部分
の近傍の割れの発生を減少することができる。Next, when the coil 2 is energized from this state, the magnet 3
, the elastic force of the plate spring 5 causes the plate spring 5 to separate from the base yoke 1, and the wire 7 moves toward the print medium and comes into contact with the print medium, thereby performing printing. At this time, when the wire 7 comes into contact with the print medium, the armature 6 is driven mainly near the tip, and continues to be driven even after the leaf spring 5 comes into contact with the side yoke 9, but the stopper 11b causes the armature 6 to move. Since the driving of the rear end is restricted, the separating force acting between the armature 6 and the leaf spring 5 is reduced. Therefore, it is possible to reduce the possibility of the laser welded portion coming off or the occurrence of cracks in the vicinity of the laser welded portion of the leaf spring.

なお、本実施例によればアーマチュア６の後端がストッ
パー１１ｂに当接するため、板はね５の高次の撮動の発
生を抑制することができ、安定した印字品質を保つこと
ができる。According to this embodiment, since the rear end of the armature 6 comes into contact with the stopper 11b, it is possible to suppress the occurrence of high-order imaging of the plate spring 5, and it is possible to maintain stable printing quality.

発明の効果 本発明は、アーマチュアの後端の駆動を規制するストッ
パーを設けたものであり、印字時にストッパーによりア
ーマチュアの駆動が規制されているため、板はねとアー
マチュアの間に働いているこれらを引き離そうとする力
が小さく押えられ、板はねとアーマチュアの間のレーザ
ー溶接した部分の外れや、あるいは板ばねのレーザー溶
接した部分の近傍の割れの発生を減少することができる
。Effects of the Invention The present invention is provided with a stopper that regulates the drive of the rear end of the armature, and since the drive of the armature is regulated by the stopper during printing, these parts acting between the plate spring and the armature are The force that tries to pull them apart can be suppressed, reducing the possibility of the laser welded part between the leaf spring and the armature coming off, or the occurrence of cracks in the vicinity of the laser welded part of the leaf spring.

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

第１図は本発明の一実施例における印字ヘッドの半断面
図、第２図は従来の印字ヘッドの半断面図、第３図は同
要部断面図、第４図は同印字状態を示す半断面図である
。 ｌ・・・ベースヨーク、２・・・コイル、３・・・マグ
ネット、４・・・補助ヨーク、５・・・板ばね、６・・
・アーマチュア、７・・・ワイヤー、８・・・先端ガイ
ド、９・・・サイドヨーク、１１・・・ノーズ、１１ａ
・・・ストッパー、１１ｂ・・・ストッパー。Fig. 1 is a half-sectional view of a print head according to an embodiment of the present invention, Fig. 2 is a half-sectional view of a conventional print head, Fig. 3 is a sectional view of the same main part, and Fig. 4 shows the same printing state. It is a half sectional view. l... Base yoke, 2... Coil, 3... Magnet, 4... Auxiliary yoke, 5... Leaf spring, 6...
・Armature, 7...Wire, 8...Tip guide, 9...Side yoke, 11...Nose, 11a
...stopper, 11b...stopper.

Claims (1)

【特許請求の範囲】[Claims] 印字のためのワイヤーと、前記ワイヤーを一端に保持す
るアーマチュアと、前記アーマチュアとともに磁路を形
勢するサイドヨークと、前記アーマチュアを保持する板
ばねを備え、前記アーマチュアに当接することにより前
記アーマチュアの前記ワイヤーを保持していない端部の
印字方向への駆動を規制するストッパー手段を設けたこ
とを特徴とする印字ヘッド。It includes a wire for printing, an armature that holds the wire at one end, a side yoke that forms a magnetic path together with the armature, and a leaf spring that holds the armature. A print head characterized by being provided with a stopper means for regulating the drive of the end portion that does not hold the wire in the printing direction.
JP62147583A 1987-06-12 1987-06-12 Print head Expired - Fee Related JPH0722996B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62147583A JPH0722996B2 (en) 1987-06-12 1987-06-12 Print head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62147583A JPH0722996B2 (en) 1987-06-12 1987-06-12 Print head

Publications (2)

Publication Number Publication Date
JPS63312159A true JPS63312159A (en) 1988-12-20
JPH0722996B2 JPH0722996B2 (en) 1995-03-15

Family

ID=15433632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62147583A Expired - Fee Related JPH0722996B2 (en) 1987-06-12 1987-06-12 Print head

Country Status (1)

Country Link
JP (1) JPH0722996B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0467041U (en) * 1990-10-22 1992-06-15

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS603042U (en) * 1983-06-20 1985-01-10 沖電気工業株式会社 dot printing head
JPS6112736U (en) * 1984-06-28 1986-01-25 不二マイクロ株式会社 Wire holder for wire dot printer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS603042U (en) * 1983-06-20 1985-01-10 沖電気工業株式会社 dot printing head
JPS6112736U (en) * 1984-06-28 1986-01-25 不二マイクロ株式会社 Wire holder for wire dot printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0467041U (en) * 1990-10-22 1992-06-15

Also Published As

Publication number Publication date
JPH0722996B2 (en) 1995-03-15

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