JP2668421B2 - Print head - Google Patents
Print headInfo
- Publication number
- JP2668421B2 JP2668421B2 JP28572788A JP28572788A JP2668421B2 JP 2668421 B2 JP2668421 B2 JP 2668421B2 JP 28572788 A JP28572788 A JP 28572788A JP 28572788 A JP28572788 A JP 28572788A JP 2668421 B2 JP2668421 B2 JP 2668421B2
- Authority
- JP
- Japan
- Prior art keywords
- horn
- printing
- displacement
- print head
- elastic 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
Landscapes
- Impact Printers (AREA)
Description
【発明の詳細な説明】 〔概要〕 電歪素子等の駆動素子をワイヤ等の印字部材の駆動源
として用いる印字ヘッドに関し、 構造の簡単化及び信頼性の向上を実現することを目的
とし、 変位発生用の駆動素子と、一端に印字部材を有し前記
駆動素子の変位の伝達を受ける可動部材とを備えた印字
ヘッドにおいて、ホーン状弾性部材を設けて、該ホーン
状弾性部材の広断面端に前記駆動素子を連結するととも
に、前記可動部材の他端近傍の２点を、前記印字部材に
近い１点は前記ホーン状弾性部材の小断面端に、他の１
点は前記ホーン状弾性部材の広断面端近傍にそれぞれ固
定した構成とする。DETAILED DESCRIPTION OF THE INVENTION [Summary] A print head using a drive element such as an electrostrictive element as a drive source of a print member such as a wire is provided. In a print head comprising: a driving element for generation; and a movable member having a printing member at one end and receiving transmission of displacement of the driving element, a horn-shaped elastic member is provided, and a wide section end of the horn-shaped elastic member is provided. And two points near the other end of the movable member, one point near the printing member is connected to a small cross-sectional end of the horn-shaped elastic member, and
The points are each configured to be fixed near the wide section end of the horn-shaped elastic member.
本発明は電歪素子等の駆動素子をワイヤ等の印字部材
の駆動源として用いる印字ヘッドに関する。The present invention relates to a print head that uses a driving element such as an electrostrictive element as a driving source for a printing member such as a wire.
近時、ワイヤドットプリンタの高速化要求に伴い、電
磁方式に代わって、電歪素子を用いた高速作動印字ヘッ
ドが求められている。この種の電歪素子としては、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、これを焼成して得られたものが使用され
る。Recently, with the demand for higher speed of the wire dot printer, a high-speed operation print head using an electrostrictive element has been required instead of the electromagnetic system. As this type of electrostrictive element, for example, as shown on page 92 of Nikkei Mechanical published on March 12, 1984, a plurality of piezoelectric elements having a metal paste film serving as an internal electrode formed on one surface are provided. What is obtained by stacking ceramic green sheets and firing them is used.
第２図は従来の駆動素子を用いた印字ヘッドの構造を
示す側面図で、図中、１は駆動素子（電歪素子）、２は
２段式変位拡大機構、３は印字部材（ワイヤ）である。FIG. 2 is a side view showing the structure of a print head using a conventional driving element. In the drawing, 1 is a driving element (electrostrictive element), 2 is a two-stage displacement magnifying mechanism, and 3 is a printing member (wire). Is.
駆動素子１は、基部が枠体４に固定されている。 The drive element 1 has a base fixed to the frame 4.
２段式変位拡大機構２は、第１のレバー５と、第２の
レバー（可動部材）６とにより構成されている。第1,第
２のレバー5,6は、それぞれ基部が枠体４に一体に連結
されて図示のように配置され、第１のレバー５の先端部
は第２のレバー６の基部付近に連結されている。駆動素
子１の上端は第１のレバー５の基部付近に連結されてい
る。The two-stage displacement magnifying mechanism 2 includes a first lever 5 and a second lever (movable member) 6. The first and second levers 5 and 6 have bases integrally connected to the frame 4 and are arranged as shown in the figure. The tip of the first lever 5 is connected to the vicinity of the base of the second lever 6. Has been done. The upper end of the drive element 1 is connected near the base of the first lever 5.
印字部材３は第２のレバー６の先端に取り付けられて
いる。The printing member 3 is attached to the tip of the second lever 6.
このような構成の印字ヘッドにより印字を行う際に
は、駆動素子１の電極間に所定補系の電圧を印加して充
電する。これにより、駆動素子１には上下方向のパルス
状変位が生じ、該変位は、第1,第２のレバー5,6のレバ
ー比により２段に拡大され、この拡大された変位が印字
部材３に伝達されて該印字部材３による印字が行われ
る。When printing is performed by the print head having such a configuration, a predetermined auxiliary voltage is applied between the electrodes of the drive element 1 to charge the drive element 1. As a result, a pulse-like displacement in the vertical direction occurs in the drive element 1, and the displacement is enlarged in two steps by the lever ratio of the first and second levers 5 and 6. And the printing by the printing member 3 is performed.
しかしながら、この従来方式では、枠体と一体の２段
変位拡大機構を用いているため、構造が複雑になって製
造が面倒で、かつ信頼度が低いという各種の欠点を有し
ていた。However, in this conventional method, since the two-stage displacement enlarging mechanism integrated with the frame is used, the structure is complicated, the manufacturing is troublesome, and there are various disadvantages such as low reliability.
本発明は構造の簡単化及び信頼性の向上を実現するこ
とのできる印字ヘッドを提供することを目的とするもの
である。SUMMARY OF THE INVENTION It is an object of the present invention to provide a print head that can realize a simplified structure and improved reliability.
上述の目的を達成するため、本発明では、変位発生用
の駆動素子と、一端に印字部材を有し、前記駆動素子の
変位の伝達を受ける可動部材とを備えた印字ヘッドにお
いて、ホーン状弾性部材を設けて、該ホーン状弾性部材
の広断面端に前記駆動素子を連結するとともに、前記可
動部材の他端近傍の２点を、前記印字部材に近い１点は
前記ホーン状弾性部材の小断面端に、他の１点は前記ホ
ーン状弾性部材の広断面端近傍にそれぞれ固定した構成
とする。In order to achieve the above object, according to the present invention, in a print head including a driving element for generating displacement and a movable member having a printing member at one end and receiving transmission of the displacement of the driving element, A member is provided to connect the driving element to a wide cross-sectional end of the horn-shaped elastic member, and two points near the other end of the movable member are connected to a small point of the horn-shaped elastic member. At the end of the cross section, the other one is fixed near the end of the wide cross section of the horn-shaped elastic member.
印字時に駆動素子に発生する変位は、ホーン状弾性部
材の広断面端から小断面端に向け伝搬される間に増幅さ
れ、この増幅された変位は、可動部材のレバー比（可動
部材とホーン状弾性部材の前記接続による）によりさら
に拡大されて印字部材に伝達される。従って、充分な変
位拡大率が得られる。また、従来の変位拡大機能を持つ
場合に比べ構造が簡単化され、信頼性も向上する。The displacement generated in the driving element during printing is amplified while propagating from the wide section end to the small section end of the horn-shaped elastic member, and the amplified displacement is determined by the lever ratio of the movable member (movable member and horn-shaped member). The elastic member is further enlarged and transmitted to the printing member. Therefore, a sufficient displacement magnification rate can be obtained. In addition, the structure is simplified and reliability is improved as compared with the conventional case having a displacement magnifying function.
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構造を示す側面図
で、図中、11はホーン状弾性部材、12は一端に印字部材
３を備えた可動部材である。FIG. 1 is a side view showing the structure of a print head according to the present invention, in which 11 is a horn-shaped elastic member, and 12 is a movable member having a print member 3 at one end.
ホーン状弾性部材11は、ゴム等の弾性体で図示の形状
に形成され、その広断面端11aは駆動素子１の上端（自
由端）に連結されている。The horn-shaped elastic member 11 is formed of an elastic body such as rubber into a shape shown in the figure, and has a wide-section end 11 a connected to the upper end (free end) of the drive element 1.
可動部材12は、その他端近傍の２点のうち、印字部材
３に近い１点がホーン状弾性部材11の小断面端11bに、
他の１点がホーン状弾性部材11の広断面端11aの近傍に
それぞれ固定されている。The movable member 12 has one point near the printing member 3 among the two points near the other end, at the small section end 11b of the horn-shaped elastic member 11,
The other one point is fixed near the wide cross-section end 11a of the horn-shaped elastic member 11, respectively.
印字に際しては、駆動素子１の電極間に所定波形の電
圧を印加して充電する。これにより、駆動素子１には上
下方向のパルス状変位が生じ、該パルス状変位は（ａ）
→（ｂ）のようにホーン状弾性部材11の広断面端11aに
伝えられる。この変位は、ホーン状弾性部材11内を伝搬
する間に、断面積が小さくなるにつれて（ｂ）→（ｃ）
と増幅され、小断面端11bでは大きな変位となる。この
変位は、可動部材12のレバー比L2/L1によりさらに拡大
されて印字部材３に伝達される。そして、このように伝
達された拡大変位によって、印字部材３による印字が行
われる。電極に対する電圧印加は印字完了直前に停止し
て放電が開始され、印字を完了した印字部材３は、駆動
素子1,ホーン状弾性部材11,可動部材12とともにもとの
状態に復帰する。そして、駆動素子１への充放電を繰り
返すことにより所定の印字が行われる。At the time of printing, a voltage having a predetermined waveform is applied between the electrodes of the driving element 1 to charge it. As a result, a vertical pulse-like displacement is generated in the drive element 1, and the pulse-like displacement is (a).
-> It is transmitted to the wide cross-section end 11a of the horn-shaped elastic member 11 as shown in (b). This displacement is (b) → (c) as the cross-sectional area decreases while propagating in the horn-shaped elastic member 11.
And a large displacement occurs at the small section end 11b. This displacement is further enlarged by the lever ratio L 2 / L 1 of the movable member 12 and transmitted to the printing member 3. Then, the enlarged displacement thus transmitted causes the printing member 3 to perform printing. The voltage application to the electrodes is stopped immediately before the completion of the printing, and the discharge is started. The printing member 3 having completed the printing returns to the original state together with the driving element 1, the horn-shaped elastic member 11, and the movable member 12. Then, predetermined printing is performed by repeating charging and discharging of the driving element 1.
このように、印字時には、ホーン状弾性部材11及び可
動部材12のレバー比により拡大された変位によって印字
が行われるようになっており、充分な変位拡大率が得ら
れる。また、構造は従来より簡単化され、信頼性も向上
する。As described above, at the time of printing, printing is performed by the displacement enlarged by the lever ratio of the horn-shaped elastic member 11 and the movable member 12, and a sufficient displacement enlargement ratio can be obtained. In addition, the structure is simplified and reliability is improved.
上述の説明では駆動素子を電歪素子としたが、駆動素
子を磁歪素子としても同様の効果が得られる。Although the drive element is an electrostrictive element in the above description, the same effect can be obtained by using a magnetostrictive element as the drive element.
以上述べたように、本発明によれば、構造の簡単化及
び変位拡大率，信頼性の構造を実現することができる。As described above, according to the present invention, it is possible to realize a structure having a simplified structure, a displacement enlargement ratio, and reliability.
第１図は本発明の実施例の印字ヘッドの構造を示す側面
図、 第２図は従来の駆動素子を用いた印字ヘッドの構造を示
す側面図で、 図中、 １は駆動素子、 ３は印字部材、 11はホーン状弾性部材、 11aは広断面端、 11bは小断面端、 12は可動部材である。FIG. 1 is a side view showing a structure of a print head according to an embodiment of the present invention, FIG. 2 is a side view showing a structure of a print head using a conventional drive element, in which 1 is a drive element, and 3 is a drive element. A printing member, 11 is a horn-shaped elastic member, 11a is a wide-section end, 11b is a small-section end, and 12 is a movable member.
Claims (1)
位の伝達を受ける可動部材（12）とを備えた印字ヘッド
において、 ホーン状弾性部材（11）を設けて、該ホーン状弾性部材
11の広断面端（11a）に前記駆動素子（１）を連結する
とともに、 前記可動部材（12）の他端近傍の２点のうち、前記印字
部材（３）に近い１点は前記ホーン状弾性部材（11）の
小断面端（11b）に、他の１点は前記ホーン状弾性部材
（11）の広断面端（11a）にそれぞれ固定したことを特
徴とする印字ヘッド。1. A print head comprising: a drive element (1) for generating displacement; and a movable member (12) having a printing member (3) at one end and receiving transmission of the displacement of the drive element (1). , A horn-shaped elastic member (11) is provided.
The drive element (1) is connected to a wide section end (11a) of the movable member (11). Of the two points near the other end of the movable member (12), one point close to the printing member (3) is the horn shape. A print head characterized by being fixed to a small section end (11b) of an elastic member (11) and another point to a wide section end (11a) of the horn-shaped elastic member (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28572788A JP2668421B2 (en) | 1988-11-14 | 1988-11-14 | Print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28572788A JP2668421B2 (en) | 1988-11-14 | 1988-11-14 | Print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02131951A JPH02131951A (en) | 1990-05-21 |
| JP2668421B2 true JP2668421B2 (en) | 1997-10-27 |
Family
ID=17695255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28572788A Expired - Fee Related JP2668421B2 (en) | 1988-11-14 | 1988-11-14 | Print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2668421B2 (en) |
-
1988
- 1988-11-14 JP JP28572788A patent/JP2668421B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02131951A (en) | 1990-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |