JP2691558B2 - Print head - Google Patents
Print headInfo
- Publication number
- JP2691558B2 JP2691558B2 JP9572888A JP9572888A JP2691558B2 JP 2691558 B2 JP2691558 B2 JP 2691558B2 JP 9572888 A JP9572888 A JP 9572888A JP 9572888 A JP9572888 A JP 9572888A JP 2691558 B2 JP2691558 B2 JP 2691558B2
- Authority
- JP
- Japan
- Prior art keywords
- elastic
- drive element
- movable member
- fixed
- members
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000005219 brazing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 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〕 通電時に変位する圧電素子等の駆動素子を利用したワ
イヤドットインパクトプリンタ用印字ヘッドに関し、 印字動作を安定化させて十分な印字ストロークが得ら
れるようにすることを目的とし、 ベースフレームと、該ベースフレームに基部が固定さ
れ、通電時に変位する駆動素子と、先端に印字ワイヤが
固定された可動部材と、一端が前記駆動素子にその変位
が伝達されるように連結され、他端が前記可動部材に固
定された第１の弾性部材と、前記第１の弾性部材とほぼ
平行に配置され、一端が前記ベースフレームに、他端が
前記可動部材にそれぞれ固定された第２の弾性部材とを
備えた印字ヘッドにおいて、前記第1,第２の弾性部材を
前記駆動素子の変位を伝達する方向と垂直な面内で弾性
板状部材により連結すると共にその連結部を固定し、前
記第1,第２の弾性部材が前記駆動素子の変位を前記可動
部材に伝達する方向に剛性を有し、且つ、該第1,第２の
弾性部材が対向する方向に弾性を有し、前記弾性板状部
材が前記駆動素子の変位を前記可動部材に伝達する方向
に弾性を有し、且つ、該第1,第２の弾性部材が対向する
方向及び該対向する方向と垂直な方向に剛性を有する構
成とする。DETAILED DESCRIPTION OF THE INVENTION [Outline] A print head for a wire dot impact printer that uses a driving element such as a piezoelectric element that displaces when energized, and to stabilize the printing operation so that a sufficient printing stroke can be obtained. For the purpose of, a base frame, a drive element whose base is fixed to the base frame and displaces when energized, a movable member having a print wire fixed at its tip, and one end of which the displacement is transmitted to the drive element. A first elastic member connected to the movable member and the other end fixed to the movable member, and arranged substantially parallel to the first elastic member, with one end fixed to the base frame and the other end fixed to the movable member. In the plane perpendicular to the direction of transmitting the displacement of the drive element, the first and second elastic members are formed by elastic plate members. The first and second elastic members have rigidity in the direction of transmitting the displacement of the drive element to the movable member, and the first and second elastic members are fixed together. Have elasticity in the opposing direction, the elastic plate-like member has elasticity in the direction of transmitting the displacement of the driving element to the movable member, and the first and second elastic members face each other. And a structure having rigidity in a direction perpendicular to the facing direction.
本発明は通電時に変位する圧電素子等の駆動素子を利
用したワイヤドットインパク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 impact printer that uses a driving element such as a piezoelectric element that displaces when energized.
第５図はこの種の従来の印字ヘッドの構造概要を示す
側面図で、図中、１はベースフレーム、２は圧電素子等
の駆動素子、４及び５は第１及び第２の弾性部材であ
る。FIG. 5 is a side view showing an outline of the structure of a conventional print head of this type, in which 1 is a base frame, 2 is a driving element such as a piezoelectric element, and 4 and 5 are first and second elastic members. is there.
駆動素子２は、基部がベースフレーム１に固定され、
通電時に矢印で示す上方に変位する。The base of the drive element 2 is fixed to the base frame 1,
When energized, it is displaced upward as indicated by the arrow.
可動部材３は、駆動素子７の上方に所定距離を介し対
向し、先端に印字ワイヤ６を備えている。The movable member 3 is opposed to the upper side of the drive element 7 with a predetermined distance, and is provided with the print wire 6 at the tip.
第１の弾性部材４は、上下方向に延びて配置され、下
端が駆動素子２の先端部2aに、上端が可動部材３にそれ
ぞれ固定されている。The first elastic member 4 is arranged so as to extend in the vertical direction, and has a lower end fixed to the tip portion 2 a of the drive element 2 and an upper end fixed to the movable member 3.
第２の弾性部材５は、第１の弾性部材４とほぼ平行に
配置され、下端がベースフレーム１に、上端が可動部材
３にそれぞれ固定されている。The second elastic member 5 is arranged substantially parallel to the first elastic member 4, and has a lower end fixed to the base frame 1 and an upper end fixed to the movable member 3, respectively.
印字に際しては、駆動素子２に所定時間通電する。こ
の通電により、駆動素子２の先端部2aは第５図に示すよ
うにδだけ上方に変位し、第１の弾性部材４には圧縮力
Ｐが付与される。その結果、第1,第２の弾性部材4,5に
よるバイメタル効果により、可動部材２は第５図に矢印
で示す時計方向に第６図の点線の位置まで回動し、この
可動部材３の回動動作によって印字ワイヤ６による印字
が行われる。駆動素子２に対する通電は印字完了前に停
止されており、印字を完了した可動部材３は第1,第２の
弾性部材4,5とともにもとの第５図の状態に復帰する。In printing, the drive element 2 is energized for a predetermined time. By this energization, the tip portion 2a of the drive element 2 is displaced upward by δ as shown in FIG. 5, and the compressive force P is applied to the first elastic member 4. As a result, due to the bimetal effect of the first and second elastic members 4 and 5, the movable member 2 is rotated clockwise to the position shown by the dotted line in FIG. Printing by the printing wire 6 is performed by the rotation operation. The energization to the drive element 2 is stopped before the completion of printing, and the movable member 3 which has completed the printing returns to the original state of FIG. 5 together with the first and second elastic members 4 and 5.
ところが、このような構成、作用を有する従来の印字
ヘッドにおいては、駆動素子２の変位により付与される
圧縮力によって第１の弾性部材３が座屈を起こして印字
動作が不安定になり、第1,第２の弾性部材4,5によるバ
イメタル効果が十分に得られないという欠点があった。However, in the conventional print head having such a configuration and action, the compressive force applied by the displacement of the drive element 2 causes the first elastic member 3 to buckle and the printing operation becomes unstable. There is a drawback that the bimetal effect due to the first and second elastic members 4 and 5 cannot be sufficiently obtained.
本発明は印字動作を安定化させて十分な印字ストロー
クが得られるように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。An object of the present invention is to provide a print head capable of stabilizing a printing operation and obtaining a sufficient printing stroke.
上述の目的を達成するため、本発明では、ベースフレ
ームと、該ベースフレームに基部が固定され、通電時に
変位する駆動素子と、先端に印字ワイヤが固定された可
動部材と、一端が前記駆動素子にその変位が伝達される
ように連結され、他端が前記可動部材に固定された第１
の弾性部材と、前記第１の弾性部材とほぼ平行に配置さ
れ、一端が前記ベースフレームに、他端が前記可動部材
にそれぞれ固定された第２の弾性部材とを備えた印字ヘ
ッドにおいて、前記第1,第２の弾性部材を前記駆動素子
の変位を伝達する方向と垂直な面内で弾性板状部材によ
り連結すると共にその連結部を固定し、前記第1,第２の
弾性部材が前記駆動素子の変位を前記可動部材に伝達す
る方向に剛性を有し、且つ、該第1,第２の弾性部材が対
向する方向に弾性を有し、前記弾性板状部材が前記駆動
素子の変位を前記可動部材に伝達する方向に弾性を有
し、且つ、該第1,第２の弾性部材が対向する方向及び該
対向する方向と垂直な方向に剛性を有する構成とする。In order to achieve the above-mentioned object, in the present invention, a base frame, a drive element having a base portion fixed to the base frame and displaced when energized, a movable member having a print wire fixed to a tip thereof, and one end of the drive element. Is connected to the movable member such that its displacement is transmitted to the movable member, and the other end is fixed to the movable member.
And a second elastic member arranged substantially parallel to the first elastic member and having one end fixed to the base frame and the other end fixed to the movable member. The first and second elastic members are connected by an elastic plate member in a plane perpendicular to the direction in which the displacement of the drive element is transmitted and the connecting portions are fixed, and the first and second elastic members are The elastic plate member has rigidity in the direction of transmitting the displacement of the drive element to the movable member, and has elasticity in the direction in which the first and second elastic members face each other, and the elastic plate member is the displacement of the drive element. To the movable member, and has rigidity in the direction in which the first and second elastic members face each other and in the direction perpendicular to the facing direction.
印字に際しては、駆動素子の変位により第１の弾性部
材に圧縮力が付与され、第1,第２の弾性部材によるバイ
メタル効果によって可動部材が回動して印字ワイヤによ
る印字動作が行われる。この場合、従来は上記圧縮力に
より第１の弾性部材に座屈が起って印字動作が不安定と
なっていたが、本発明では、第1,第２の弾性部材は長手
方向と垂直な面内で弾性板状部材により連結されてお
り、該第1,第２の弾性部材の長手方向の相対変位は弾性
板状部材が撓むために妨げられないが、それ以外の方向
（弾性板状部材の面内での第1,第２の弾性部材の対向方
向及びこれと垂直な方向）の相対変位は弾性板状部材に
より拘束される。従って、第１の弾性部材の座屈は防止
され、印字動作は安定する。At the time of printing, the displacement of the driving element applies a compressive force to the first elastic member, and the bimetal effect of the first and second elastic members causes the movable member to rotate to perform the printing operation by the print wire. In this case, conventionally, the compressive force causes the first elastic member to buckle and the printing operation becomes unstable. However, in the present invention, the first and second elastic members are perpendicular to the longitudinal direction. The elastic plate-shaped members are connected in-plane, and relative displacement in the longitudinal direction of the first and second elastic members is not hindered because the elastic plate-shaped members are bent, but in other directions (elastic plate-shaped members). Relative displacement of the first and second elastic members in the plane of (1) and in the direction perpendicular to this) is constrained by the elastic plate member. Therefore, the buckling of the first elastic member is prevented, and the printing operation is stable.
以下、第１図乃至第３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 FIGS.
第１図は本発明に係る印字ヘッドの構造概要を示す正
面図、第２図は同側面図、第３図は第1,2図の要部詳細
を示す斜視図で、図中、11は第１の弾性部材、12は第２
の弾性部材、13は板ばね等の弾性板状部材である。な
お、従来と同一構成の部材には従来と同様の符号を付し
ている。FIG. 1 is a front view showing the outline of the structure of a print head according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view showing the details of the main parts of FIGS. First elastic member, 12 is second
Is an elastic member, and 13 is an elastic plate member such as a leaf spring. It should be noted that the members having the same configurations as the conventional ones are denoted by the same reference numerals as the conventional ones.
第１の弾性部材11及び第２の弾性部材12は、第３図に
示すように弾性板状部材13連結用のスリット14を所定位
置に設けた以外は従来の第1,第２の弾性部材4,5と同様
のもので、上下端の固定要領も従来と同様である。な
お、本例では、第２の弾性部材12が２本設けられた例を
示している。The first elastic member 11 and the second elastic member 12 are conventional first and second elastic members except that a slit 14 for connecting the elastic plate member 13 is provided at a predetermined position as shown in FIG. It is the same as 4,5, and the fixing procedure of the upper and lower ends is the same as the conventional one. It should be noted that this example shows an example in which two second elastic members 12 are provided.
弾性板状部材13は、第1,第２の弾性部材11,12を、長
手方向（第３図のＺ方向）と垂直な面（x,y平面）内で
連結している。本例は弾性板状部材13を４枚設けて２箇
所で連結した例を示しており、連結は、第３図に示すよ
うに各弾性部材に設けられたスリット14に弾性板状部材
13を嵌合させ、嵌合部分をろう付け（図示省略）等によ
り固定することにより行われる。The elastic plate member 13 connects the first and second elastic members 11 and 12 in a plane (x, y plane) perpendicular to the longitudinal direction (Z direction in FIG. 3). This example shows an example in which four elastic plate-like members 13 are provided and connected at two locations. The connection is made by connecting the elastic plate-like members to the slits 14 provided in each elastic member as shown in FIG.
This is done by fitting 13 together and fixing the fitting part by brazing (not shown) or the like.
印字に際しては、従来と同様に駆動素子２に所定時間
通電して先端部2aを上方に所定量変位させる。これによ
り、第１の弾性部材11は圧縮力を受けるが、この場合従
来はこの圧縮力により第１の弾性部材に座屈が起って印
字動作が不安定となっていた。しかし、本発明では、第
1,第２の弾性部材11,12は長手方向であるＺ方向と垂直
なx,y平面内で弾性板状部材13により連結されており、
該第1,第２の弾性部材11,12のＺ方向の相対変位は弾性
板状部材13が撓むために妨げられないが、それ以外のx,
y方向の相対変位は弾性板状部材13により拘束される。
従って、第１の弾性部材の座屈は防止され、印字動作が
安定する。At the time of printing, the drive element 2 is energized for a predetermined time in the same manner as in the conventional case, and the tip portion 2a is displaced upward by a predetermined amount. As a result, the first elastic member 11 receives a compressive force. In this case, however, conventionally, this compressive force causes the first elastic member to buckle and the printing operation becomes unstable. However, in the present invention,
The first and second elastic members 11 and 12 are connected by an elastic plate member 13 in an x, y plane perpendicular to the Z direction which is the longitudinal direction,
The relative displacement in the Z direction of the first and second elastic members 11 and 12 is not hindered because the elastic plate member 13 bends, but other x,
The relative displacement in the y direction is restrained by the elastic plate member 13.
Therefore, the buckling of the first elastic member is prevented, and the printing operation is stabilized.
第４図に他の実施例を示す。 FIG. 4 shows another embodiment.
本例の場合は、第１の弾性部材11′の一端が、ベース
フレーム１′に板ばね21を介し片持状に支持されるレバ
ー22に連結され、レバー22は中間部で駆動素子２の先端
部2aに連結されている。すなわち、第１の弾性部材11′
の一端は、駆動素子２にその変位が伝達されるように連
結されている。また、第２の弾性部材12′の一端はベー
スフレーム１′に固定されている。各弾性部材11′,1
2′は、弾性板状部材13により前例と同様に連結されて
いる。In the case of this example, one end of the first elastic member 11 'is connected to a lever 22 supported in a cantilever manner on the base frame 1'via a leaf spring 21, and the lever 22 is an intermediate portion of the drive element 2. It is connected to the tip 2a. That is, the first elastic member 11 '
One end of is connected to the drive element 2 so that its displacement is transmitted. Further, one end of the second elastic member 12 'is fixed to the base frame 1'. Each elastic member 11 ', 1
2'is connected by an elastic plate member 13 as in the previous example.
本例の場合も前例と同様の効果が得られる。 In the case of this example, the same effect as in the previous example can be obtained.
なお、弾性板状部材13の数は、各弾性部材11,12の形
状、ばね常数等に応じ適宜選定する。The number of elastic plate-shaped members 13 is appropriately selected according to the shape of each elastic member 11, 12 and the spring constant.
以上述べたように、本発明によれば、各弾性部材の長
手方向以外のx,y方向の相対変位は弾性板状部材により
拘束されて防止されるため、印字動作時における第１の
弾性部材の座屈は起らない。As described above, according to the present invention, relative displacement of each elastic member in the x and y directions other than the longitudinal direction is restrained and prevented by the elastic plate member, so that the first elastic member during the printing operation is prevented. Buckling does not occur.
従って、印字動作は安定し、十分な印字ストロークが
得られるとともに、高速化が可能になる。Therefore, the printing operation is stable, a sufficient printing stroke can be obtained, and the speed can be increased.
第１図は本発明の実施例の印字ヘッドの構造概要を示す
正面図、 第２図は同側面図、 第３図は第1,2図の要部詳細を示す斜視図、 第４図は本発明の他の実施例の印字ヘッドの構造概要を
示す側面図、 第５図は従来の印字ヘッドの構造概要を示す側面図、 第６図は従来の印字ヘッドの作用説明図で、 図中、 1,1′はベースフレーム、 ２は駆動素子、 2aは先端部、 ３は可動部材、 ６は印字ワイヤ、 11,11′は第１の弾性部材、 12,12′は第２の弾性部材、 13は弾性板状部材である。FIG. 1 is a front view showing an outline of the structure of a print head according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a perspective view showing details of essential parts of FIGS. 1 and 2, and FIG. FIG. 5 is a side view showing an outline of the structure of a print head according to another embodiment of the present invention, FIG. 5 is a side view showing an outline of the structure of a conventional print head, and FIG. , 1,1 'is a base frame, 2 is a driving element, 2a is a tip portion, 3 is a movable member, 6 is a print wire, 11,11' is a first elastic member, and 12,12 'is a second elastic member. , 13 are elastic plate members.
Claims (1)
位する駆動素子（２）と、 先端に印字ワイヤ（６）が固定された可動部材（３）
と、 一端が前記駆動素子（２）にその変位が伝達されるよう
に連結され、他端が前記可動部材（３）に固定された第
１の弾性部材（11）と、 前記第１の弾性部材（11）とほぼ平行に配置され、一端
が前記ベースフレーム（１）に、他端が前記可動部材
（３）にそれぞれ固定された第２の弾性部材（12）とを
備えた印字ヘッドにおいて、 前記第1,第２の弾性部材（11,12）を前記駆動素子
（２）の変位を伝達する方向と垂直な面内で弾性板状部
材（13）により連結すると共にその連結部を固定し、 前記第1,第２の弾性部材（11,12）が前記駆動素子
（２）の変位を前記可動部材（３）に伝達する方向に剛
性を有し、且つ、該第1,第２の弾性部材（11,12）が対
向する方向に弾性を有し、 前記弾性板状部材（13）が前記駆動素子（２）の変位を
前記可動部材（３）に伝達する方向に弾性を有し、且
つ、該第1,第２の弾性部材（11,12）が対向する方向及
び該対向する方向と垂直な方向に剛性を有することを特
徴とする印字ヘッド。1. A movable member (3) having a base frame (1), a drive element (2) whose base is fixed to the base frame (1) and which is displaced when energized, and a print wire (6) fixed to the tip. )
A first elastic member (11), one end of which is connected to the drive element (2) so that its displacement is transmitted, and the other end of which is fixed to the movable member (3); A print head having a second elastic member (12) arranged substantially parallel to a member (11) and having one end fixed to the base frame (1) and the other end fixed to the movable member (3). , The first and second elastic members (11, 12) are connected by an elastic plate member (13) in a plane perpendicular to the direction in which the displacement of the drive element (2) is transmitted, and the connecting portions are fixed. Then, the first and second elastic members (11, 12) have rigidity in the direction of transmitting the displacement of the drive element (2) to the movable member (3), and the first and second elastic members Elastic members (11, 12) have elasticity in opposite directions, and the elastic plate member (13) displaces the drive element (2) by the movable member. 3) having elasticity in a direction of transmission to the first and second elastic members (11, 12) and rigidity in a direction perpendicular to the opposing direction. Print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572888A JP2691558B2 (en) | 1988-04-20 | 1988-04-20 | Print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572888A JP2691558B2 (en) | 1988-04-20 | 1988-04-20 | Print head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01267050A JPH01267050A (en) | 1989-10-24 |
| JP2691558B2 true JP2691558B2 (en) | 1997-12-17 |
Family
ID=14145537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9572888A Expired - Fee Related JP2691558B2 (en) | 1988-04-20 | 1988-04-20 | Print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2691558B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5208140A (en) * | 1990-09-25 | 1993-05-04 | Konica Corporation | Light-sensitive silver halide photographic material prevented in color contamination |
-
1988
- 1988-04-20 JP JP9572888A patent/JP2691558B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01267050A (en) | 1989-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |