JPS6079966A - Leaf spring unit of spring stored-energy type printing head - Google Patents

Leaf spring unit of spring stored-energy type printing head

Info

Publication number
JPS6079966A
JPS6079966A JP18889883A JP18889883A JPS6079966A JP S6079966 A JPS6079966 A JP S6079966A JP 18889883 A JP18889883 A JP 18889883A JP 18889883 A JP18889883 A JP 18889883A JP S6079966 A JPS6079966 A JP S6079966A
Authority
JP
Japan
Prior art keywords
leaf spring
armature
spring
fixed
unit
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.)
Pending
Application number
JP18889883A
Other languages
Japanese (ja)
Inventor
Makoto Yasunaga
安永 眞
Tsutomu Ikehata
池端 勉
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP18889883A priority Critical patent/JPS6079966A/en
Priority to US06/657,195 priority patent/US4610553A/en
Publication of JPS6079966A publication Critical patent/JPS6079966A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters 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
    • B41J2/23Typewriters 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
    • B41J2/27Actuators for print wires
    • B41J2/28Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control

Abstract

PURPOSE:To suppress breakage of a leaf spring of a spring stored-energy type printing head by installing a leaf spring reinforcement part on the end of the leaf spring, protrusively at the leaf spring support side and on the opposite side where an armature is equipped. CONSTITUTION:An armature 14 is fixed on the front side of the free end of a leaf spring 13 and a reinforcement plate 15 is fixed on the reverse side of the free end. The end of wire 16 is fixed at the extreme end of the armature 14. The reinforcement plate 15 is formed thinner than the leaf spring 13 and fixed to the leaf spring 13 protrusively to the leaf spring support 13a from the border 13c of the armature fixing portion 13a of the leaf spring 13 and the elastic deformation portion 13b of said leaf spring 13.

Description

【発明の詳細な説明】 [発明の利用分野] ” 本発明はバネ蓄勢型のドツト印字ヘッドの板バネユニッ
トに関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a leaf spring unit of a spring-loaded dot print head.

[発明の背景] 従来のバネ蓄勢型印字ヘッドの板バネユニットは、第1
図に示すように、片持支持された板バネ1と、この板バ
ネ1の自由端でかつコア2と反対側に固定されたアーマ
チュア3と、このアーマチュア3に固定されたワイヤ4
とから構成されている。このように板バネlの自由端に
は厚いアーマチュア3が固定されているので、板バネl
のアーマチュア固定部分1aは剛体として作用し、板バ
ネlの部分のみが弾性変形部1bとなる。
[Background of the Invention] A leaf spring unit of a conventional spring storage type print head has a first
As shown in the figure, a leaf spring 1 is supported in a cantilever manner, an armature 3 is fixed at the free end of the leaf spring 1 and on the side opposite to the core 2, and a wire 4 is fixed to the armature 3.
It is composed of. Since the thick armature 3 is fixed to the free end of the leaf spring l in this way, the leaf spring l
The armature fixed portion 1a acts as a rigid body, and only the portion of the plate spring 1 becomes an elastically deformable portion 1b.

そこで、待期状態においては、第1図に示す状態におけ
る中立点より、永久磁石(図示せず)によりアーマチュ
ア3がコア2に吸引されて板バネlを偏位させ、印字を
行う際には前記永久磁石の磁路中に設けたコイル(図示
せず)を励磁して前記永久磁石の磁界を打消すことによ
り前記偏位された板バネlを開放し、この板バネ1によ
りワイヤ4を駆動してドツト印字を行うようになってい
る。このように、板バネlは第1図に示す状態における
中立点とコア2との間を往復する。
Therefore, in the standby state, the armature 3 is attracted to the core 2 by a permanent magnet (not shown) from the neutral point in the state shown in FIG. 1, and the leaf spring 1 is deflected. By exciting a coil (not shown) provided in the magnetic path of the permanent magnet and canceling the magnetic field of the permanent magnet, the deflected leaf spring 1 is released, and the wire 4 is caused by this leaf spring 1. It is designed to perform dot printing by driving. In this way, the leaf spring 1 reciprocates between the neutral point in the state shown in FIG. 1 and the core 2.

しかしながら、かかる板バネユニットは、アーマチュア
固定部1aと弾性変形部ibとの境界部IC1即ち弾性
変形部1bの自由端の断面変化が非常に大きいので、印
字時の応力が前記境界部lCに集中する。また境界部1
c近傍の質量が大きいので、ワイヤ4が駆動されてプラ
テン(図示せず)に衝突する印字時には、板バネlの境
界部lCがオーバーストロークし、板バネに過大応力が
かかる。
However, in such a leaf spring unit, since the cross-sectional change of the boundary IC1 between the armature fixed part 1a and the elastically deformable part ib, that is, the free end of the elastically deformable part 1b, is very large, stress during printing is concentrated on the boundary IC1. do. Also, boundary part 1
Since the mass near c is large, during printing when the wire 4 is driven and collides with a platen (not shown), the boundary portion 1C of the leaf spring 1 overstrokes, and excessive stress is applied to the leaf spring.

ところで、前記境界部1cは厚さの差が急峻であるため
応力が集中し、かつ前記境界部1cにかかる集中応力は
引張応力であるので、板バネlが非常に折れ易いという
欠点があった。
By the way, since the boundary portion 1c has a steep difference in thickness, stress is concentrated thereon, and since the concentrated stress applied to the boundary portion 1c is tensile stress, there is a drawback that the leaf spring l is very easy to break. .

また従来、第2図に示すように、板バネlをアーマチュ
ア3ではさみ込んだ板バネユニットも知られている。し
かし、この構造はアーマチュア3の板バネはさみ込み面
3aが同一面よりなるので、第1図の場合と同様に、境
界部1cに引張集中応力がかかり、やはり板バネlが非
常に折れ易かった。
Furthermore, as shown in FIG. 2, a plate spring unit in which a plate spring 1 is sandwiched between armatures 3 is also known. However, in this structure, since the plate spring sandwiching surfaces 3a of the armature 3 are on the same plane, tensile concentrated stress is applied to the boundary part 1c, as in the case of Fig. 1, and the plate spring l is also very likely to break. .

[発明の目的] 本発明の目的は、板バネの折れが生じにくいバネ蓄勢型
印字ヘッドの板バネユニットを提供することにある。
[Object of the Invention] An object of the present invention is to provide a leaf spring unit for a spring storage type print head in which the leaf spring is less likely to break.

[発明の実施例] 以下、本発明の一実施例を第3図及び第4図により説明
する。第3図に示すワイヤ駆動素子取付体10の背面に
はスペーサ11を介して?lS4図に示すような構成よ
りなる複数個の板バネユニット12の板バネ13が片持
支持で自由端を中心に向けて放射状に配設されている。
[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. A spacer 11 is provided on the back side of the wire driving element mounting body 10 shown in FIG. The leaf springs 13 of a plurality of leaf spring units 12 having the configuration shown in FIG. 1S4 are cantilevered and arranged radially with their free ends directed toward the center.

前記複数の板、<ネ13の自由端の前面側にはそれぞれ
アーマチュア14が固定され、自由端の背面側にはそれ
ぞれ補強板15が固定されており、前記複数のアーマチ
ュア14のそれぞれにワイヤ16の一端が固定されてい
る。また前記ワイヤ駆動素子取付体10には前記アーマ
チュア14とわずかな隙間を形成するように切欠き溝1
0aが形成されている。
An armature 14 is fixed to the front side of the free end of the plurality of plates 13, a reinforcing plate 15 is fixed to the back side of the free end, and a wire 16 is fixed to each of the plurality of armatures 14. One end is fixed. Further, the wire driving element mounting body 10 is provided with a notch groove 1 so as to form a slight gap with the armature 14.
0a is formed.

前記複数の板バネ13の背面の固定側にはスペーサ17
、磁石取付板18、永久磁石19及びヨーク20からな
るブロック21がそれぞれ配設され、前記スペーサ12
、複数の板バネ13、複数のブロック21はそれぞれね
じ22により前記ワイヤ駆動素子取付体lOに固定され
ている。前記複数のヨーク20はそれぞれ前記アーマチ
ュア14の背面に対向して配設されたコア23を有し。
A spacer 17 is provided on the fixed side of the back surface of the plurality of leaf springs 13.
, a block 21 consisting of a magnet mounting plate 18, a permanent magnet 19, and a yoke 20 are provided, and the spacer 12
, a plurality of leaf springs 13, and a plurality of blocks 21 are each fixed to the wire driving element mounting body 10 by screws 22. Each of the plurality of yokes 20 has a core 23 disposed opposite to the back surface of the armature 14.

これらコア23にはそれぞれコイル24が装着され、コ
イル24はそれぞれ図示しない電子回路に接続されてい
る。
A coil 24 is attached to each of these cores 23, and each coil 24 is connected to an electronic circuit (not shown).

mI記ワイヤ駆動素子取付体lOの正面にはガイドフレ
ーム30がねじ31により固定されている。前記ガイド
フレーム30は図示しないキャリアに固定されており、
前記ガイドフレーム30の影線1−1キr71セ16ル
資山十スリlヤイイV32が取付られている。
A guide frame 30 is fixed to the front surface of the wire drive element mounting body IO with screws 31. The guide frame 30 is fixed to a carrier (not shown),
A shadow line 1-1 of the guide frame 30 is attached to the guide frame 30.

従って、永久磁石19の起磁力によって発生する磁力は
、磁石取付板18、スペーサ17、板/(ネ13、スペ
ーサ12からワイヤ駆動素子取付体10に、ワイヤ駆動
素子取付体lOがら空隙を通って7=マチュア14.板
バネ13に、板バネ13より空隙を通ってコア23、ヨ
ーク20に通って、アーマチュア14及びワイヤ16は
板)(ネ13の復元力に抗してコア23に吸着されてい
る。
Therefore, the magnetic force generated by the magnetomotive force of the permanent magnet 19 is transmitted from the magnet mounting plate 18, spacer 17, plate/(ne) 13, and spacer 12 to the wire drive element mounting body 10 through the air gap from the wire drive element mounting body lO 7 = Mature 14. The armature 14 and wire 16 pass through the gap from the plate spring 13 to the core 23 and the yoke 20, and the armature 14 and wire 16 are attracted to the core 23 against the restoring force of the spring 13. ing.

そこで、コイル24に通電を行うことによってコア23
がアーマチュア14を吸引する吸引力は弱められてアー
マチュア14及びワイヤ16は、板バネ13の復元力に
よりコア23がら離れる方向に飛翔して印字を行う。
Therefore, by energizing the coil 24, the core 23
The suction force that attracts the armature 14 is weakened, and the armature 14 and wire 16 fly away from the core 23 due to the restoring force of the leaf spring 13 to perform printing.

本発明においては、第4図に示すように、補強板15は
板バネ13より薄く形成されており、かつ板バネ13の
アーマチュア固定部13aと板、<ネ13の弾性変形部
13bとの境界部13cより板バネ支持部13d側に突
出して板/曳ネ13に固定されている。
In the present invention, as shown in FIG. 4, the reinforcing plate 15 is formed thinner than the leaf spring 13, and the boundary between the armature fixing part 13a of the leaf spring 13 and the elastically deforming part 13b of the plate 13. It protrudes from the portion 13c toward the leaf spring support portion 13d and is fixed to the plate/drawing screw 13.

このため、補強板15の端部15aと前記境界部13c
との間の板バネ部分13eは剛性が上り、境界部13c
にかかる引張り応力は小さくなる。また補強板15の端
部15aに対応した板バネ13の部分が弾性変形部13
bの自由端13fとなるが、端部15aと板バネ13の
間は圧縮応力なので、板バネ13は非常に折れにくい。
Therefore, the end portion 15a of the reinforcing plate 15 and the boundary portion 13c
The rigidity of the plate spring portion 13e between the boundary portion 13c and
The tensile stress applied to becomes smaller. Further, the portion of the leaf spring 13 corresponding to the end portion 15a of the reinforcing plate 15 is the elastically deformable portion 13.
However, since there is compressive stress between the end portion 15a and the leaf spring 13, the leaf spring 13 is extremely difficult to break.

このように、板バネ13の弾性変形部13bの自由端1
3fにおける引張り応力が大きくかかる側(アーマチュ
ア14側)には段差がないので。
In this way, the free end 1 of the elastically deformable portion 13b of the leaf spring 13
There is no step on the side (armature 14 side) where a large tensile stress is applied at 3f.

応力集中がなく板バネ13の折れは防1Fされる。There is no stress concentration and the plate spring 13 is prevented from breaking.

第5図は本発明の他の実施例を示す0本実施例は、補強
板15をアーマチュア14と一体構造に形成してなる。
FIG. 5 shows another embodiment of the present invention. In this embodiment, the reinforcing plate 15 is formed integrally with the armature 14.

即ち、アーマチュア14に溝14aを設け、板バネ13
を溝14aにはさみ込んでなり、補強板15に相当する
アーマチュア14の補強部14bを前記実施例と同様に
板バネ13のアーマチュア固定部13aと板バネ13の
弾性変形部13bとの境界部13cより板バネ支持部1
3d側に突出して形成されている。このように構成して
も前記実施例と同様な効果が得られる。
That is, the armature 14 is provided with a groove 14a, and the leaf spring 13
is inserted into the groove 14a, and the reinforcing part 14b of the armature 14, which corresponds to the reinforcing plate 15, is inserted into the boundary part 13c between the armature fixing part 13a of the leaf spring 13 and the elastically deforming part 13b of the leaf spring 13, as in the previous embodiment. Twisted leaf spring support part 1
It is formed to protrude toward the 3d side. Even with this configuration, the same effects as in the embodiment described above can be obtained.

[発明の効果] 以上の説明から明らかな如く1本発明になるバネ蓄勢型
印字ヘッドの板バネユニットよれば、板バネのアーマチ
ュアと反対側に補強板を配置し、かつこの補強板を板バ
ネの7=マチュア固定部と板バネの弾性変形部との境界
部より板バネ支持部側に突出して固定してなるので、応
力集中がなく板バネの折れは防止される。
[Effects of the Invention] As is clear from the above description, according to the leaf spring unit of the spring storage type print head according to the present invention, a reinforcing plate is disposed on the opposite side of the armature of the leaf spring, and this reinforcing plate is Since the spring 7 is fixed so as to protrude from the boundary between the mature fixing part and the elastic deformation part of the leaf spring toward the leaf spring support part, there is no stress concentration and the leaf spring is prevented from breaking.

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

第1図及び第2図はそれぞれ従来の板バネユニットの説
明図、第3図はドツト印字ヘッドを示し、(a)は一部
切欠き正面図、(b)は一部νJ欠き断面側面図、tt
S4図は本発明の一実施例を示す斜視図、第5図は本発
明の他の実施例を示す斜視図である。 13−’−・板バネ、’13a・・・アーマチュア固定
部、13b・・・弾性変形部、13c・・・境界部、1
3d−−・板バネ支持部。 14・・拳ア〜マチュア、 14b−・Φ補強第1図 第2図 第 3 (0) (b) 第5図
Figures 1 and 2 are explanatory diagrams of a conventional leaf spring unit, respectively, and Figure 3 shows a dot print head, where (a) is a partially cutaway front view, and (b) is a partially cutaway cross-sectional side view of νJ. ,tt
FIG. S4 is a perspective view showing one embodiment of the present invention, and FIG. 5 is a perspective view showing another embodiment of the present invention. 13-'--Plate spring, '13a... Armature fixing part, 13b... Elastic deformation part, 13c... Boundary part, 1
3d--Flat spring support part. 14...Fist A~Mature, 14b-・Φ Reinforcement Fig. 1 Fig. 2 Fig. 3 (0) (b) Fig. 5

Claims (3)

【特許請求の範囲】[Claims] (1) 片持支持される板バネと、この板バネの自由端
でかつコアと反対側に固定されたアーマチュアと、この
アーマチュアに固定されたワイヤとからなるバネ蓄勢型
印字ヘッドの板バネユニットにおいて、前記板バネの前
記アーマチュアと反対面に板バネ補強部を有し、かつこ
の板バネ補強部の前記板バネ支持部側端部が前記アーマ
チュアの板バネ支持部側端部より板バネ支持部側に突出
して形成したことを特徴とするバネ蓄勢型印字ヘッドの
板バネユニット。
(1) A leaf spring for a spring-loaded print head consisting of a cantilevered leaf spring, an armature fixed at the free end of the leaf spring on the opposite side of the core, and a wire fixed to the armature. In the unit, the leaf spring has a leaf spring reinforcing part on a surface opposite to the armature, and an end of the leaf spring reinforcing part on the leaf spring support part side is closer to the leaf spring support part than the end of the armature on the leaf spring support part side. A leaf spring unit of a spring storage type print head characterized by being formed so as to protrude toward a support portion.
(2) 板バネ補強部は、アーマチュアと一体構造より
なることを特徴とする特許請求の範囲第1項記載のバネ
蓄勢型印字ヘッドの板バネユニット。
(2) The plate spring unit of the spring storage type print head according to claim 1, wherein the plate spring reinforcing portion is integrally constructed with the armature.
(3) 板バネ補強部は、アーマチュアと別体構・lL
し11 Jl−1+−レL献九し+ス牡訛悄士り縞園筑
1項記載のバネ蓄勢型印字ヘッドの板バネユニット。
(3) The leaf spring reinforcement part is separate from the armature.
11 Jl-1+-LeL-Ken-Kushi+S-Okaku-Yujiri-Simazono Chiku A leaf spring unit of the spring storage type print head described in item 1.
JP18889883A 1983-10-08 1983-10-08 Leaf spring unit of spring stored-energy type printing head Pending JPS6079966A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP18889883A JPS6079966A (en) 1983-10-08 1983-10-08 Leaf spring unit of spring stored-energy type printing head
US06/657,195 US4610553A (en) 1983-10-08 1984-10-03 Leaf spring unit for a dot matrix printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18889883A JPS6079966A (en) 1983-10-08 1983-10-08 Leaf spring unit of spring stored-energy type printing head

Publications (1)

Publication Number Publication Date
JPS6079966A true JPS6079966A (en) 1985-05-07

Family

ID=16231807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18889883A Pending JPS6079966A (en) 1983-10-08 1983-10-08 Leaf spring unit of spring stored-energy type printing head

Country Status (1)

Country Link
JP (1) JPS6079966A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228589A2 (en) * 1985-12-06 1987-07-15 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Needle printing head

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228589A2 (en) * 1985-12-06 1987-07-15 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Needle printing head
EP0228589A3 (en) * 1985-12-06 1987-10-14 Honeywell Information Systems Italia S.P.A. Needle printing head

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