JPH0741722B2 - Print head - Google Patents
Print headInfo
- Publication number
- JPH0741722B2 JPH0741722B2 JP63175068A JP17506888A JPH0741722B2 JP H0741722 B2 JPH0741722 B2 JP H0741722B2 JP 63175068 A JP63175068 A JP 63175068A JP 17506888 A JP17506888 A JP 17506888A JP H0741722 B2 JPH0741722 B2 JP H0741722B2
- Authority
- JP
- Japan
- Prior art keywords
- electrostrictive element
- print head
- printing
- elastic
- support member
- 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 - Fee Related
Links
- 238000007639 printing Methods 0.000 claims description 23
- 230000008602 contraction Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- B41J2/295—Actuators for print wires using piezoelectric elements
Landscapes
- Impact Printers (AREA)
Description
【発明の詳細な説明】 〔概 要〕 印字動作の駆動源として電歪素子を用いたワイヤドット
プリンタ用印字ヘッドに関し、 高速でかつ信頼度の高い印字ヘッドを提供することを目
的とし、 印字素子の印字動作の駆動源として電歪素子を用いたド
ットインパクトプリンタ用印字ヘッドにおいて、前記電
歪素子の両端を、張力が付与された弾性部材で連結した
構成とする。DETAILED DESCRIPTION OF THE INVENTION [Outline] A print head for a wire dot printer using an electrostrictive element as a driving source for a printing operation, which aims to provide a print head with high speed and high reliability. In a print head for a dot impact printer using an electrostrictive element as a driving source for the printing operation, both ends of the electrostrictive element are connected by elastic members to which tension is applied.
本発明は印字動作の駆動源として電歪素子を用いたワイ
ヤドットプリンタ用印字ヘッドに関する。The present invention relates to a print head for a wire dot printer using an electrostrictive element as a driving source for printing operation.
近時ドットプリンタの高速化要求に伴い、電磁方式に代
わる電歪素子等の駆動素子を用いたより高速の印字ヘッ
ドが求められている。電歪素子は、例えば1984年３月12
日発行の日経メカニカル第92頁に示されたように、片側
の表面に内部電極となる金属ペースト膜が形成された複
数枚の圧電セラミックスのグリーンシートを積層した
後、まとめて焼成を行って得られる。このような電歪素
子を印字ヘッドの駆動源として用いる場合には、素子自
体の引張強度が著しく弱いために、素子の信頼度を構造
的にカバーする手段が必要である。With the recent demand for higher speed dot printers, there has been a demand for higher speed print heads using drive elements such as electrostrictive elements instead of the electromagnetic system. The electrostrictive element is, for example, 12 March 1984.
As shown on page 92 of Nikkei Mechanical published by Nikkei, it is obtained by stacking multiple sheets of piezoelectric ceramic green sheets with a metal paste film to be an internal electrode on one surface and then firing them together. To be When such an electrostrictive element is used as a drive source for a print head, the tensile strength of the element itself is extremely weak, and therefore a means for structurally covering the reliability of the element is required.
第２図はこの種の手段を備えた従来の印字ヘッドの要部
構造を示す側面図で、図中、１は可動部材、２は該可動
部材１と一体的に設けられた弾性支持部材、３は電歪素
子である。FIG. 2 is a side view showing a main part structure of a conventional print head provided with this kind of means, in which 1 is a movable member, 2 is an elastic support member integrally provided with the movable member 1, Reference numeral 3 is an electrostrictive element.
可動部材１は先端に印字ピン（印字素子）４を備えてお
り、弾性支持部材２の基部（可動部材１接続側と反対側
の端部）はベース部材５に固定されている。The movable member 1 is provided with a printing pin (printing element) 4 at its tip, and the base portion of the elastic support member 2 (end portion on the side opposite to the movable member 1 connection side) is fixed to the base member 5.
電歪素子３は、基部が接続部材６を介しベース部材５に
接続され、上端が接続部材７を介し可動部材１と弾性支
持部材２の結合部分に接続されている。この電歪素子３
の上端の接続は、可動部材１が鎖線で示す位置（イ）か
ら実線の位置（ロ）まで撓むように弾性支持部材２を弾
性変形させておいて行われる。すなわち、弾性支持部材
２に可動部材１の初期撓みρｐに相当する応力が生じて
いる状態で電歪素子３が接続されており、その反力によ
って、電歪素子３には圧縮力が付与されている。すなわ
ち、電歪素子３の欠点（引張強度が弱い）がカバーされ
る構造となっている。The electrostrictive element 3 has a base connected to the base member 5 via a connecting member 6, and an upper end connected to a connecting portion between the movable member 1 and the elastic supporting member 2 via a connecting member 7. This electrostrictive element 3
The upper end is connected by elastically deforming the elastic support member 2 so that the movable member 1 bends from the position (a) shown by the chain line to the position (b) shown by the solid line. That is, the electrostrictive element 3 is connected to the elastic support member 2 in a state in which a stress corresponding to the initial deflection ρp of the movable member 1 is generated, and a compressive force is applied to the electrostrictive element 3 by the reaction force thereof. ing. That is, the structure is such that the defect of the electrostrictive element 3 (weak tensile strength) is covered.
印字に際しては、電歪素子３に所定時間通電する。これ
により、電歪素子３に歪（伸び）が発生し、接続部材７
には上方向への変位が付与される。その結果、弾性支持
部材２がさらに弾性変形して可動部材１は鎖線で示す位
置（ハ）までδだけ撓む。この場合の変位拡大率はl2/l
1となる。O1はこの可動部材１の撓み時の回転中心であ
る。そして、この可動部材１の動きによって、印字ピン
４による印字が行われる。電歪素子３に対する通電は印
字完了直前に停止され、印字を完了した可動部材１は、
もとの状態に復帰する電歪素子３の動きに伴って実線の
もとの位置（ロ）に復帰する。At the time of printing, the electrostrictive element 3 is energized for a predetermined time. As a result, strain (expansion) occurs in the electrostrictive element 3, and the connecting member 7
Is given an upward displacement. As a result, the elastic support member 2 is further elastically deformed, and the movable member 1 is bent by δ to the position (C) shown by the chain line. The displacement magnifying power in this case is l 2 / l
Becomes 1 . O 1 is the center of rotation when the movable member 1 is bent. Then, by the movement of the movable member 1, printing is performed by the printing pin 4. The energization of the electrostrictive element 3 is stopped immediately before the completion of printing, and the movable member 1 that has completed printing is
With the movement of the electrostrictive element 3 that returns to the original state, the original position (b) of the solid line is restored.
従来の印字ヘッドは上述のような構成，作用を有してお
り、印字時に弾性支持部材２に発生する応力は可動部材
１の全撓みδＴ＝δｐ＋δに相当するものとなるため、
高速化のために弾性支持部材２を小型化すると応力が過
大になって信頼度が低下するという問題があった。The conventional print head has the above-described configuration and operation, and the stress generated in the elastic support member 2 during printing corresponds to the total deflection δ T = δp + δ of the movable member 1.
When the elastic support member 2 is downsized for speeding up, there is a problem that stress becomes excessive and reliability is lowered.
本発明は高速でかつ信頼度の高い印字ヘッドを提供する
ことを目的とするものである。An object of the present invention is to provide a high-speed and highly reliable print head.
上述の目的を達成するため、本発明では、印字素子の印
字動作時の駆動源として電歪素子を用いたドットインパ
クトプリンタ用印字ヘッドにおいて、前記電歪素子の伸
縮方向の両端が該電歪素子に圧縮荷重を加える線状の弾
性部材で連結されており、且つ、該弾性部材が前記電歪
素子の伸縮方向に沿って位置すると共に、該伸縮方向と
直角方向の前記電歪素子の幅内の中央部に位置するよう
に配された構成とする。To achieve the above object, in the present invention, in a print head for a dot impact printer using an electrostrictive element as a driving source during a printing operation of the print element, both ends of the electrostrictive element in the expansion / contraction direction are the electrostrictive element. Is connected by a linear elastic member that applies a compressive load to the electrostrictive element, and the elastic member is located along the expansion / contraction direction of the electrostrictive element, and within the width of the electrostrictive element perpendicular to the expansion / contraction direction. It is arranged so as to be located in the central part of.
印字に際しては、電子素子に所定時間通電する。この通
電により電歪素子に発生した歪によって、印字素子によ
る印字動作が行われる。電歪素子に対する通電は印字完
了直前に停止され、印字動作を完了した印字素子は、も
との状態に復帰する電歪素子の動きに伴ってもとの状態
に復帰する。During printing, the electronic element is energized for a predetermined time. Due to the strain generated in the electrostrictive element due to this energization, the printing operation by the printing element is performed. The energization of the electrostrictive element is stopped immediately before the completion of printing, and the printing element that has completed the printing operation returns to the original state with the movement of the electrostrictive element that returns to the original state.
本発明では、このような印字動作の駆動源となる電歪素
子の両端は張力が付与された弾性部材により連結されて
おり、電歪素子に圧縮荷重が付与されるため、従来のよ
うに弾性支持部材に初期変形を与える必要がなくなり、
弾性支持部材を含む可動部を小型化して固有振動数を上
げることが可能になる。In the present invention, both ends of the electrostrictive element, which is a driving source for such a printing operation, are connected by elastic members to which tension is applied, and a compressive load is applied to the electrostrictive element. There is no need to give initial deformation to the support member,
The movable part including the elastic support member can be downsized to increase the natural frequency.
すなわち、高速でかつ信頼度の高い印字ヘッドを実現す
ることができる。That is, it is possible to realize a high-speed and highly reliable print head.
以下、第１図に関連して本発明の実施例を説明する。 An embodiment of the present invention will be described below with reference to FIG.
第１図は本発明に係る印字ヘッドの要部構造を示す側面
図で、図中、11は可動部材、12は弾性支持部材、13は弾
性部材である。FIG. 1 is a side view showing a main structure of a print head according to the present invention, in which 11 is a movable member, 12 is an elastic support member, and 13 is an elastic member.
弾性支持部材12の基部はベース部材５に固定され、該弾
性支持部材12の先端には、可動部材11が片持状に一体的
に結合されている。そして、これらの両部材の結合部分
には、電歪素子３の上端が接続部材７を介し接続されて
いる。The base of the elastic support member 12 is fixed to the base member 5, and the movable member 11 is cantilevered integrally with the tip of the elastic support member 12. The upper end of the electrostrictive element 3 is connected to the connecting portion of these two members via a connecting member 7.
弾性部材13は、両端に結合部14,15を備えた線状のもの
で、図示していないがこの弾性部材13を設けた面に対向
する面に設けられ、且つ、この弾性部材13と対をなすも
う一つの弾性部材と共に、電歪素子３の両端を張力が付
与された状態で連結している。この連結は、張力が付与
された弾性部材13の両端の結合部14,15を接続部材6,7に
ねじ等により固定することにより行われる。The elastic member 13 is a linear member having coupling portions 14 and 15 at both ends, and is provided on the surface opposite to the surface on which the elastic member 13 is provided, though not shown, and is opposed to the elastic member 13. Both ends of the electrostrictive element 3 are connected together with another elastic member that forms a tensioned state. This connection is performed by fixing the connecting portions 14 and 15 at both ends of the elastic member 13 to which tension is applied to the connecting members 6 and 7 with screws or the like.
このように、本発明では、電歪素子３の両端は張力が付
与された弾性部材13により連結されており、電歪素子３
に圧縮荷重が付与されるため、従来のように、弾性支持
部材12に初期変形を与える必要がなくなり、弾性支持部
材を含む可動部を小型化して（初期応力がなくなるため
小型化が可能になる）固有振動数を上げることが可能に
なる。As described above, in the present invention, both ends of the electrostrictive element 3 are connected by the elastic members 13 to which tension is applied.
Since a compressive load is applied to the elastic support member 12, there is no need to apply an initial deformation to the elastic support member 12, which makes it possible to downsize the movable portion including the elastic support member (since the initial stress is eliminated, the size can be reduced. ) It becomes possible to increase the natural frequency.
従って、高速でかつ信頼度の高い印字ヘッドを実現する
ことが可能になる。Therefore, it is possible to realize a high-speed and highly reliable print head.
印字要領については、従来と同様なので説明を省略す
る。なお、O2は可動部材11が印字時に撓む際の回転中心
である。The printing procedure is the same as the conventional one, and the description is omitted. Note that O 2 is the center of rotation when the movable member 11 bends during printing.
以上述べたように、本発明によれば、高速動作が可能で
かつ信頼度の高い印字ヘッドが得られる。As described above, according to the present invention, it is possible to obtain a print head that can operate at high speed and has high reliability.
第１図は本発明の実施例の印字ヘッドの要部構造を示す
側面図、 第２図は従来の印字ヘッドの要部構造を示す側面図で、 図中、 ３は圧電素子、 ４は印字ピン（印字素子）、 11は可動部材、 12は弾性支持部材、 13は弾性部材である。FIG. 1 is a side view showing a main part structure of a print head according to an embodiment of the present invention, and FIG. 2 is a side view showing a main part structure of a conventional print head. In the figure, 3 is a piezoelectric element and 4 is a print. Pins (printing elements), 11 is a movable member, 12 is an elastic support member, and 13 is an elastic member.
Claims (1)
素子（３）を用いたドットインパクトプリンタ用印字ヘ
ッドにおいて、 前記電歪素子の伸縮方向の両端が該電歪素子に圧縮荷重
を加える線状の弾性部材（13）で連結されており、且
つ、該弾性部材（13）が前記電歪素子の伸縮方向に沿っ
て位置すると共に、該伸縮方向と直角方向の前記電歪素
子の幅内の中央部に位置するように配されていることを
特徴とする印字ヘッド。1. A print head for a dot impact printer using an electrostrictive element (3) as a driving source during a printing operation of a print element, wherein both ends of the electrostrictive element in a direction of expansion and contraction apply a compressive load to the electrostrictive element. The elastic member (13) is connected by a linear elastic member (13), and the elastic member (13) is positioned along the expansion / contraction direction of the electrostrictive element, and the electrostrictive element in the direction perpendicular to the expansion / contraction direction. A print head, which is arranged so as to be positioned at a central portion within the width.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63175068A JPH0741722B2 (en) | 1988-07-15 | 1988-07-15 | Print head |
| CA000593534A CA1319295C (en) | 1988-03-18 | 1989-03-13 | Printing head of wire-dot impact printer |
| US07/323,833 US5005994A (en) | 1988-03-18 | 1989-03-15 | Printing head of wire-dot impact printer |
| DE8989400747T DE68903515T2 (en) | 1988-03-18 | 1989-03-16 | PRINT HEAD OF A NEEDLE POINT PRINTER. |
| EP89400747A EP0333595B1 (en) | 1988-03-18 | 1989-03-16 | Printing head of wire-dot impact printer |
| ES198989400747T ES2035593T3 (en) | 1988-03-18 | 1989-03-16 | PRINTER HEAD OF A PRINTER BY IMPACTS OF NEEDLES. |
| KR1019890003324A KR920000390B1 (en) | 1988-03-18 | 1989-03-17 | Printing head of wire dot impact printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63175068A JPH0741722B2 (en) | 1988-07-15 | 1988-07-15 | Print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0225342A JPH0225342A (en) | 1990-01-26 |
| JPH0741722B2 true JPH0741722B2 (en) | 1995-05-10 |
Family
ID=15989670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63175068A Expired - Fee Related JPH0741722B2 (en) | 1988-03-18 | 1988-07-15 | Print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741722B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347656A (en) * | 1991-05-27 | 1992-12-02 | Fujitsu Ltd | Piezoelectric element-type actuator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6354257A (en) * | 1986-08-25 | 1988-03-08 | Nec Corp | Piezoelectric actuator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196539U (en) * | 1986-06-04 | 1987-12-14 |
-
1988
- 1988-07-15 JP JP63175068A patent/JPH0741722B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6354257A (en) * | 1986-08-25 | 1988-03-08 | Nec Corp | Piezoelectric actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0225342A (en) | 1990-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0373468B2 (en) | ||
| KR920000390B1 (en) | Printing head of wire dot impact printer | |
| JPH0596755A (en) | Holding structure of piezoelectric element type actuator | |
| JPH0741722B2 (en) | Print head | |
| CA1331313C (en) | Printing head of wire-dot impact printer | |
| JP2608463B2 (en) | Print head | |
| JPS5916767A (en) | Printing unit | |
| JP2736648B2 (en) | Print head | |
| JPS59150756A (en) | Printing mechanism | |
| JPH01264857A (en) | Printing head | |
| JPH05147237A (en) | Print head | |
| JPS60969A (en) | Impact printing head | |
| JPH02130153A (en) | Printing head | |
| JPS6147272A (en) | Mechanical amplifying mechanism | |
| JPH0557915A (en) | Printing head | |
| JPH04278362A (en) | Piezoelectric print head | |
| JPH066382B2 (en) | Print element | |
| JPH01275150A (en) | Printing head | |
| JPH02131952A (en) | Printing head | |
| JPS63144054A (en) | Printing head | |
| JPH0557916A (en) | Method for assembly of piezoelectric element type actuator | |
| JPH0469550B2 (en) | ||
| JPS63120662A (en) | Printer | |
| JPH06975A (en) | Printing head | |
| JPH0469549B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |