JPH066381B2 - Printing hammer - Google Patents
Printing hammerInfo
- Publication number
- JPH066381B2 JPH066381B2 JP62218236A JP21823687A JPH066381B2 JP H066381 B2 JPH066381 B2 JP H066381B2 JP 62218236 A JP62218236 A JP 62218236A JP 21823687 A JP21823687 A JP 21823687A JP H066381 B2 JPH066381 B2 JP H066381B2
- Authority
- JP
- Japan
- Prior art keywords
- hinge
- piezoelectric element
- shaped
- arm
- shaped 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 - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- 238000006073 displacement reaction Methods 0.000 description 22
- 238000005452 bending Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003825 pressing 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】 （産業上の利用分野） 本発明は、プリンタの印字ヘッドに使用する印字ハンマ
に関し、特に、圧電素子を駆動源とする印字ハンマに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print hammer used for a print head of a printer, and more particularly to a print hammer using a piezoelectric element as a drive source.
（従来の技術） 従来のプリンタの印字ヘッドに用いられる印字ハンマ
は、その駆動源として、電磁形のアクチュエータが広く
用いられている。このような電磁形のアクチュエータ
は、コイルに電流を流すことによって磁界を発生し、そ
れによる磁力を利用して可動部材を駆動する構成となっ
ている。このため、銅損や鉄損が生じて大きな入力エネ
ルギを必要とするばかりでなく、発熱や磁気干渉を生ず
る等の問題点を有している。(Prior Art) An electromagnetic actuator is widely used as a drive source of a print hammer used in a print head of a conventional printer. Such an electromagnetic actuator is configured to generate a magnetic field by passing an electric current through a coil and use the magnetic force generated thereby to drive a movable member. Therefore, there is a problem that not only a large input energy is required due to copper loss or iron loss, but also heat generation or magnetic interference occurs.
このため、電気・機械エネルギ変換効率が高く、かつ低
電力で駆動でき、しかも発熱量が少なく磁気干渉もない
圧電素子を駆動源とする印字ハンマが考えられている。
たとえば、第５図に示すような（特開昭58-163668号参
照）印字ハンマがある。For this reason, a printing hammer using a piezoelectric element, which has a high electric-mechanical energy conversion efficiency, can be driven with low power, and has a small amount of heat generation and no magnetic interference, as a driving source has been considered.
For example, there is a printing hammer as shown in FIG. 5 (see Japanese Patent Laid-Open No. 58-163668).
第５図に示した印字ハンマは、下端が固定部材50に結合
された圧電素子51と、下端部に２個の第一および第二の
結合部52および53を有し、そのうちの１個の結合部52は
固定部材50に結合し、他の１個の結合部53は圧電素子51
の上端に結合された第一のアーム54と、上下方向に互に
近接した２個の第三および第四の結合部55および56を有
し、そのうちの１個の結合部55はアーム54の上端に結合
し、他の１個の結合部56は固定部材50の上辺に結合した
第二のアーム57と、アーム57の左端に固着された印字ワ
イヤ58とを備えている。The printing hammer shown in FIG. 5 has a piezoelectric element 51 whose lower end is connected to a fixing member 50 and two first and second connecting parts 52 and 53 at the lower end, one of which is The coupling portion 52 is coupled to the fixing member 50, and the other coupling portion 53 is connected to the piezoelectric element 51.
Has a first arm 54 coupled to the upper end of the arm and two third and fourth coupling parts 55 and 56 which are vertically adjacent to each other, one of which is a part of the arm 54. The other coupling portion 56 coupled to the upper end includes a second arm 57 coupled to the upper side of the fixing member 50, and a printing wire 58 fixed to the left end of the arm 57.
第５図(a)は圧電素子51に電圧が印加されていない状態
（不動作状態）を示す図、第５図(b)は圧電素子51に電
圧が印加された状態（動作状態）を示す図である。FIG. 5 (a) is a diagram showing a state where a voltage is not applied to the piezoelectric element 51 (non-operating state), and FIG. 5 (b) is a state showing a voltage being applied to the piezoelectric element 51 (operating state). It is a figure.
第５図(a)の状態にある圧電素子51に電圧が印加される
と、第５図(b)に示すように、圧電素子51は矢印Ａ方向
に伸び、これによって第一のアーム54はその下端の右方
を押され、結合部52を支点として矢印θ1方向に回動す
る。圧電素子51の変位量は梃子の原理によって拡大され
て結合部55に伝達される。このためアーム57は、結合部
55において引張られて結合部56を支点として矢印θ2方
向に回動する。これによって結合部55の変位量も梃の原
理によって拡大されて印字ワイヤ58に伝達される。この
ように圧電素子51の変位量は、アーム54および57の回動
運動によって拡大されて印字ワイヤ58に伝達されて印字
動作を行う。When a voltage is applied to the piezoelectric element 51 in the state of FIG. 5 (a), the piezoelectric element 51 extends in the direction of arrow A, as shown in FIG. 5 (b), whereby the first arm 54 is moved. The right end of the lower end is pushed, and it rotates in the direction of arrow θ 1 with the joint 52 as a fulcrum. The displacement amount of the piezoelectric element 51 is enlarged by the principle of leverage and transmitted to the coupling part 55. Therefore, the arm 57 is
It is pulled at 55 and rotates in the direction of the arrow θ 2 with the joint 56 as the fulcrum. As a result, the displacement amount of the coupling portion 55 is also expanded by the leverage principle and transmitted to the printing wire 58. In this way, the displacement amount of the piezoelectric element 51 is enlarged by the rotational movement of the arms 54 and 57 and transmitted to the print wire 58 to perform the printing operation.
上述したような従来の印字ヘッドは、圧電素子を駆動源
として使用しているため、低電力かつ低発熱であって磁
気干渉もないという利点を有しているが、圧電素子の変
位量を拡大して印字ワイヤに伝達する必要があり、この
ための変位量拡大機構が１個のアームと２個の結合部と
による梃子作用を行う構成体を２段階に直列に接続した
２段増幅形変位量拡大機構となっている。このため、従
来の印字ハンマは構造が複雑であるという問題がある。Since the conventional print head as described above uses a piezoelectric element as a drive source, it has the advantages of low power consumption, low heat generation, and no magnetic interference, but the amount of displacement of the piezoelectric element is increased. It is necessary to transmit it to the printing wire, and the displacement expansion mechanism for this purpose is a two-stage amplification type displacement structure in which two arms are connected in series in a structure that performs leverage by one arm and two coupling parts. It is a volume expansion mechanism. Therefore, the conventional printing hammer has a problem that the structure is complicated.
また、このような変位量拡大機構は、梃子の原理を応用
しているため、変位量は拡大するが、力は縮少するとい
う性質を有している。従って第一のアームと第一および
第二の結合部とから構成される第一段目の変位量拡大機
構は、その出力として大きな力を得ることが困難であ
り、このため、第二段目の変位量拡大機構の第三および
第四の結合部の曲げ剛性を第一および第二の結合部の曲
げ剛性よりも小さくする必要がある。この結果、第二の
アームと第三および第四の結合部とから構成される二段
目の変位量拡大機構の固有振動数は低くなり、この結果
として印字ハンマの印字動作の応答周波数が高くならな
いため、印字速度を早くすることができないという問題
点もある。Further, such a displacement amount expanding mechanism has a property that the displacement amount is expanded but the force is reduced because the lever principle is applied. Therefore, it is difficult for the displacement amount expansion mechanism of the first stage composed of the first arm and the first and second coupling portions to obtain a large force as its output. It is necessary to make the bending rigidity of the third and fourth joints of the displacement amount increasing mechanism of 3 smaller than the bending rigidity of the first and second joints. As a result, the natural frequency of the displacement magnifying mechanism in the second stage, which is composed of the second arm and the third and fourth coupling parts, becomes low, and as a result, the response frequency of the printing operation of the printing hammer becomes high. Therefore, there is a problem that the printing speed cannot be increased.
近年、このような問題点を解決するものとして梃子１段
でもって圧電素子の変位を拡大して印字動作を行う印字
ハンマが考えられている。たとえば、第６図に示すよう
な印字ハンマがある。In recent years, as a means for solving such a problem, a printing hammer has been considered which performs a printing operation by enlarging the displacement of the piezoelectric element with one lever. For example, there is a printing hammer as shown in FIG.
第６図において、アーム１はその端部1aに薄板状の第一
のヒンジ２と、これを挟んで横方向（幅方向）の両側に
設けた薄板状の第二および第三のヒンジ３および４を有
している。第一のヒンジ２は、圧電素子５の伸縮方向
（矢印Ｂ）の一端5aの端面に結合されており、第二およ
び第三のヒンジ３および４の一端は固定部材６の端面に
結合されている。圧電素子５の伸縮方向の他方の端部5b
も固定部材６に結合されている。アーム１の他端1bには
印字ワイヤ７が結合されている。In FIG. 6, the arm 1 has a thin plate-shaped first hinge 2 at its end portion 1a, and thin plate-shaped second and third hinges 3 provided on both sides in the lateral direction (width direction) sandwiching this. Have four. The first hinge 2 is connected to the end surface of one end 5a of the piezoelectric element 5 in the expansion / contraction direction (arrow B), and the one ends of the second and third hinges 3 and 4 are connected to the end surface of the fixing member 6. There is. The other end 5b of the piezoelectric element 5 in the expansion / contraction direction
Is also connected to the fixing member 6. A print wire 7 is connected to the other end 1b of the arm 1.
第７図は第６図の従来例の第一および第二および第三の
ヒンジ２および３および４の配設状態の詳細を示す斜視
図である。第二および第三のヒンジ３および４は、第一
のヒンジ２を挟んでその左右（幅方向）の両側に設けら
れており、高さ（厚さ）方向は、第一のヒンジ２の位置
とはずれていて、所定の寸法の段差を有している。第二
のヒンジ３と第三のヒンジ４とは同じ高さに配設されて
いる。FIG. 7 is a perspective view showing details of the arrangement of the first, second and third hinges 2 and 3 and 4 of the conventional example of FIG. The second and third hinges 3 and 4 are provided on both the left and right sides (width direction) of the first hinge 2 with the first hinge 2 interposed therebetween, and the height (thickness) direction is the position of the first hinge 2. And has a step with a predetermined size. The second hinge 3 and the third hinge 4 are arranged at the same height.
このような構成を有する印字ハンマの圧電素子５に電圧
を印加すると、第８図に示すような動作を行う。すなわ
ち、圧電素子５は矢印B1方向に伸張し、第一のヒンジ２
を矢印B1方向に変位させる。一方第二および第三のヒン
ジ３および４の一端は固定部材６に、他端はアーム１に
固定されており、しかも第一のヒンジ２との間に段差を
有するため、薄板状の第一および第二および第三のヒン
ジ２および３および４は矢印Ｃ方向に曲げ変形を生じ、
アーム１も矢印Ｃの方向に回動運動を起こす。この結果
アーム１の先端に結合されている印字ワイヤ７は、圧電
素子５の変位量が拡大されて伝達され、矢印Ｄの方向に
動いて印字動作を行う。When a voltage is applied to the piezoelectric element 5 of the printing hammer having such a configuration, the operation as shown in FIG. 8 is performed. That is, the piezoelectric element 5 extends in the direction of arrow B1 and the first hinge 2
Is displaced in the direction of arrow B1. On the other hand, one end of each of the second and third hinges 3 and 4 is fixed to the fixing member 6 and the other end thereof is fixed to the arm 1, and there is a step between the second hinge and the first hinge 2. And the second and third hinges 2 and 3 and 4 undergo bending deformation in the direction of arrow C,
The arm 1 also makes a rotational movement in the direction of arrow C. As a result, the displacement of the piezoelectric element 5 is enlarged and transmitted to the printing wire 7 connected to the tip of the arm 1 and moves in the direction of arrow D to perform the printing operation.
このように、本従来例の印字ハンマにおいては、第二お
よび第三のヒンジ３および４を第一のヒンジ２を挟んで
その横方向（幅方向）の両側に設け、その高さ（厚さ）
方向の位置を第一のヒンジ２との間に段差を有するよう
に配設することによって、第一のヒンジ２の中心線と第
二および第三のヒンジ３および４の中心線との間の距離
を、第５図の従来例のような各ヒンジを平面的に配置し
たものと比較して短くすることができる。この結果、変
位量拡大機構としての変位拡大率を大きくすることがで
きるため、アームを１個しか使用しなくても、印字ワイ
ヤにその印字動作に必要な動作量（ストローク）を与え
ることができる。As described above, in the printing hammer of this conventional example, the second and third hinges 3 and 4 are provided on both sides in the lateral direction (width direction) with the first hinge 2 interposed therebetween, and the height (thickness) )
By arranging the directional position so as to have a step between the first hinge 2 and the first hinge 2, the position between the center line of the first hinge 2 and the center lines of the second and third hinges 3 and 4 is The distance can be shortened as compared with the conventional arrangement in which the hinges are arranged in a plane as shown in FIG. As a result, the displacement enlargement ratio of the displacement amount enlargement mechanism can be increased, so that even if only one arm is used, the operation amount (stroke) required for the printing operation can be given to the printing wire. .
したがって、従来のようにアームを２個使用したものと
比較して、アームの等価質量が小さくなるため、変位量
拡大機構の固有振動数が高くなり、従って印字ヘッドの
印字動作の応答周波数が高くなって高速動作が可能な印
字ハンマが得られる。Therefore, the equivalent mass of the arm is smaller than that of the conventional one using two arms, so that the natural frequency of the displacement amount magnifying mechanism is high, and the response frequency of the print operation of the print head is high. As a result, a printing hammer that can operate at high speed can be obtained.
また、上述のように変位量拡大機構が１個のアームと３
個のヒンジで構成されているため、構造が単純な印字ハ
ンマが得られる。Further, as described above, the displacement amount expansion mechanism has one arm and three arms.
Since it is composed of individual hinges, a printing hammer having a simple structure can be obtained.
（発明が解決しようとする問題点） 上述したような従来の印字ハンマは、圧電素子を駆動源
として使用しているため、低電力かつ低発熱であって磁
気干渉もないという利点を有しており、さらに、圧電素
子の変位を拡大して印字ワイヤに伝達する変位量拡大機
構も１段増幅で行っているため、構造が単純で高速動作
ができるという長所があるが、梃子動作を起こさせる各
ヒンジの配置が立体的になっているため、ヒンジ部の加
工を放電加工によって行っており、生産性が悪く製造コ
ストが高いという問題点がある。(Problems to be Solved by the Invention) Since the conventional printing hammer as described above uses a piezoelectric element as a driving source, it has advantages of low power consumption, low heat generation, and no magnetic interference. In addition, since the displacement amount expansion mechanism that expands the displacement of the piezoelectric element and transmits it to the print wire is also performed by one-stage amplification, it has the advantage that the structure is simple and high-speed operation is possible, but it causes the leverage operation. Since the hinges are arranged three-dimensionally, the hinge portion is processed by electric discharge machining, which causes a problem of poor productivity and high manufacturing cost.
本発明の目的は、上述のような従来の圧電素子を駆動源
とする印字ハンマの欠点を改良して、構成が単純である
ため製造コストが安くしかも高速で動作することのでき
る印字ハンマを提供することにある。An object of the present invention is to improve the drawbacks of the conventional printing hammer using a piezoelectric element as a driving source, and to provide a printing hammer which has a simple structure and thus has a low manufacturing cost and can operate at high speed. To do.
（問題点を解決するための手段） 本発明の印字ハンマは一方の端部に印字ワイヤを固着し
他方の端部に第一の結合部を有するアームと、一方の端
部を前記第一の結合部に接続し他方の端部を第二の結合
部に接続した薄板状の第一のヒンジと、前記第一のヒン
ジの幅方向の左右に配設され前記第一のヒンジに対して
その厚さ方向に対して所定の寸法に等しい段差を有し前
記第一の結合部にその一端を接続し他方の端部を固定部
材に接続した薄板状の第二および第三のヒンジと、一方
の端部を前記第二の結合部に固定し、他方の端部を前記
固定部材に固定した圧電素子とから構成され、前記第一
のヒンジは薄板状のＴ字形の部材で構成され、前記第二
および第三のヒンジは一枚の薄板状のＵ字形の部材で構
成され、前記第一の結合部材に設けた２本の溝にそれぞ
れ前記Ｔ字形部材および前記Ｕ字形部材の一端を挿入し
ろう接し、前記Ｔ字形部材の他端は前記第二の結合部に
設けた溝に挿入しろう接し、前記Ｕ字形部材の他端は前
記固定部材に設けた溝に挿入しろう接して構成される。(Means for Solving the Problems) The printing hammer of the present invention has an arm having a print wire fixed to one end and a first connecting portion at the other end, and one end having the first A thin plate-shaped first hinge connected to the coupling portion and the other end thereof connected to the second coupling portion, and the first hinge is arranged on the left and right in the width direction of the first hinge with respect to the first hinge. Thin plate-shaped second and third hinges having a step equal to a predetermined dimension in the thickness direction and having one end connected to the first coupling portion and the other end connected to a fixing member; Of the piezoelectric element having one end fixed to the second coupling portion and the other end fixed to the fixing member, and the first hinge is a thin plate T-shaped member. The second and third hinges are composed of a single U-shaped member having a thin plate shape, and are provided on the first connecting member. One end of each of the T-shaped member and the U-shaped member is inserted into and brazed into the groove of the book, and the other end of the T-shaped member is inserted into and brazed into a groove provided in the second coupling portion. The other end is inserted into a groove provided in the fixing member and brazed.
（作用） 本発明の印字ハンマは、第一のヒンジは薄板状のＴ字形
部材で構成され、第二および第三のヒンジは一枚の薄板
状のＵ字形部材で構成され、それぞれ端部を固定側の部
材に設けた溝に挿入ろう接して接続している。(Operation) In the printing hammer of the present invention, the first hinge is composed of a thin plate-shaped T-shaped member, and the second and third hinges are composed of one thin plate-shaped U-shaped member, each of which has an end portion. It is connected by inserting and brazing it into a groove provided in the fixed member.
Ｔ字形部材とＵ字形部材はプレス加工等で容易に安く製
作することができるため、生産性が良く製造コストの安
い印字ハンマを得ることができる。Since the T-shaped member and the U-shaped member can be easily manufactured at low cost by pressing or the like, it is possible to obtain a printing hammer having high productivity and low manufacturing cost.
（実施例） 次に本発明の実施例について図面を参照して詳細に説明
する。(Example) Next, the Example of this invention is described in detail with reference to drawings.
第１図は本発明の一実施例を示す分解斜視図、第２図は
第１図の実施例におけるヒンジの接続を示す拡大斜視
図、第３図は第１図の実施例の動作状態を示す斜視図で
ある。FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing the connection of hinges in the embodiment of FIG. 1, and FIG. 3 is an operation state of the embodiment of FIG. It is a perspective view shown.
第１図において、アーム11は一端に印字ワイヤ17が固着
され他端に第一の結合部18を有しており、第一の結合部
18には二本の溝18a,18bが設けてある。圧電素子15は一
端が固定部材16に固定され他端に第二の結合部19が接続
されており、第二の結合部19は圧電素子15との接続面と
反対側に溝19aが設けられている。固定部材16は端部に
溝16a,16bが設けられている。第一のヒンジ部を構成す
る薄板状のＴ字形部材12の一端12aは第一の結合部材18
に設けられた溝18aに挿入ろう接され、Ｔ字形部材12の
端部12bは第二の結合部19に設けられた溝19aに挿入ろう
接される。また、第二および第三のヒンジ部を構成する
Ｕ字形部材13は一端13aが第一の結合部18に設けられた
溝18bに挿入されろう接され、他端13b,13cは固定部材16
に設けられた溝16a,16bにそれぞれ挿入されろう接され
る。In FIG. 1, the arm 11 has a print wire 17 fixed to one end and a first connecting portion 18 at the other end.
The groove 18 is provided with two grooves 18a and 18b. The piezoelectric element 15 has one end fixed to the fixing member 16 and the other end connected to the second coupling portion 19, and the second coupling portion 19 is provided with a groove 19a on the side opposite to the connection surface with the piezoelectric element 15. ing. The fixing member 16 has grooves 16a and 16b at its end. One end 12a of the thin plate-shaped T-shaped member 12 forming the first hinge portion has a first coupling member 18
The end portion 12b of the T-shaped member 12 is inserted and brazed into the groove 18a provided in the second coupling portion 19. Further, one end 13a of the U-shaped member 13 constituting the second and third hinge portions is inserted into and brazed into a groove 18b provided in the first coupling portion 18, and the other ends 13b and 13c are fixed to the fixing member 16.
Are inserted into the grooves 16a, 16b provided in the respective parts and brazed.
第２図は第１図の実施例の第一のヒンジ部12b′を構成
するＴ字形部材12と第二および第三のヒンジ部13b′，1
3c′を構成するＵ字形部13と第一の結合部18との接続の
状態を示す拡大斜視図である。第一の結合部18には二本
の溝18a,18bが設けられており、溝18aに第一のヒンジ部
12b′を構成するＴ字形部材12の一端12aが挿入されろう
接されている。溝18bに第二および第三のヒンジ13b′，
13c′を構成するＵ字形部材13の一端13aが挿入されろう
接されている。このようにすると第二および第三のヒン
ジ部13b′，13c′は第一のヒンジ部12b′を挟んでその
左右（幅方向）の両側に設けられ、高さ（厚さ）方向
は、第一のヒンジ部12b′の位置とはずれていて、所定
の寸法の段差を有する構造となる。FIG. 2 shows the T-shaped member 12 and the second and third hinge portions 13b ', 1 constituting the first hinge portion 12b' of the embodiment shown in FIG.
FIG. 3 is an enlarged perspective view showing a state of connection between a U-shaped portion 13 and a first coupling portion 18 which form 3c ′. The first coupling portion 18 is provided with two grooves 18a and 18b, and the groove 18a has a first hinge portion.
One end 12a of the T-shaped member 12 forming 12b 'is inserted and brazed. The second and third hinges 13b ′, in the groove 18b,
One end 13a of the U-shaped member 13 forming 13c 'is inserted and brazed. In this way, the second and third hinge portions 13b 'and 13c' are provided on both the left and right sides (width direction) of the first hinge portion 12b ', and the height (thickness) direction is The structure has a step having a predetermined size, which is deviated from the position of the one hinge portion 12b '.
このような構成を有する印字ハンマの圧電素子15に電圧
を印加すると、第３図に示すような動作を行う。すなわ
ち、圧電素子15は矢印B1方向に伸張し、第一のヒンジ部
12を矢印B1方向に変位させる。一方第二および第三のヒ
ンジ部13および14の一端は固定部材16に、他端はアーム
11の第一の結合部18に固定されており、しかも第一のヒ
ンジ部12との間に段差を有するため、薄板状の第一およ
び第二および第三のヒンジ部12および13および14は矢印
Ｃ方向に曲げ変形を生じ、アーム11も矢印Ｃの方向に回
動運動を起こす。この結果アーム11の先端に結合されて
いる印字ワイヤ１７は、圧電素子15の変位量が拡大され
て伝達され、矢印Ｄの方向に動いて印字動作を行う。When a voltage is applied to the piezoelectric element 15 of the printing hammer having such a configuration, the operation as shown in FIG. 3 is performed. That is, the piezoelectric element 15 extends in the direction of arrow B1 and
Displace 12 in the direction of arrow B1. On the other hand, one end of each of the second and third hinge portions 13 and 14 is a fixing member 16, and the other end is an arm.
Since it is fixed to the first joint portion 18 of 11 and has a step between the first hinge portion 12 and the first hinge portion 12, the thin plate-shaped first and second and third hinge portions 12 and 13 and 14 are Bending deformation occurs in the direction of arrow C, and the arm 11 also makes a rotational movement in the direction of arrow C. As a result, the displacement amount of the piezoelectric element 15 is enlarged and transmitted to the print wire 17 connected to the tip of the arm 11, and the print wire 17 moves in the direction of arrow D to perform the print operation.
このように本発明の印字ハンマにおいては、各ヒンジ部
とアームおよび圧電素子および固定部材との間の接続
は、固定側の部材に溝を設けその溝に第一のヒンジ部を
構成するＴ字形部材の両端と第二および第三のヒンジ部
を構成するＵ字形部材の端部をそれぞれ挿入しろう接す
ることによって、Ｔ字形部材およびＵ字形部材はプレス
加工等で容易に安く製作することができるため、生産性
が良く製造コストの安い印字ハンマが得られる。As described above, in the printing hammer of the present invention, the connection between each hinge portion, the arm, the piezoelectric element, and the fixing member is a T-shape in which a groove is provided in the fixed member and the first hinge portion is formed in the groove. By inserting both ends of the member and the ends of the U-shaped members forming the second and third hinge portions and brazing them, the T-shaped member and the U-shaped member can be easily manufactured at low cost by press working or the like. Therefore, a printing hammer having high productivity and low manufacturing cost can be obtained.
また、圧電素子の変位を拡大する変位量拡大機構は単純
な１段増幅形のため、可動部の等価質量は小さくなり、
高速動作可能な印字ハンマが得られる。Further, since the displacement amount expansion mechanism for expanding the displacement of the piezoelectric element is a simple one-stage amplification type, the equivalent mass of the movable part becomes small,
A printing hammer that can operate at high speed can be obtained.
（発明の効果） 以上説明したように、本発明の印字ハンマは構成が単純
で生産性が良いため安価に製造できるという効果があ
り、また応答周波数が高いため、高速の印字動作を行う
ことができるという効果がある。(Effects of the Invention) As described above, the printing hammer of the present invention has an effect that it can be manufactured at low cost because of its simple structure and good productivity. Moreover, since the response frequency is high, high-speed printing operation can be performed. The effect is that you can do it.
第１図は本発明の一実施例を示す分解斜視図、第２図は
第１図の実施例におけるヒンジ部の接続を示す拡大斜視
図、第３図は第１図は実施例の動作状態を示す斜視図、
第４図は従来の印字ハンマの一例を示す側面図で、(a)
は不動作状態を示す図、(b)は動作状態を示す図、第５
図は従来の印字ハンマの別の実施例を示す斜視図、第６
図は第５図の実施例におけるヒンジの配置を示す拡大斜
視図、第７図は第５図の実施例の動作状態を示す斜視図
である。 1・11・54・57…アーム、2・12b′…第一のヒンジ、3・13b′
…第二のヒンジ、4・13c′…第三のヒンジ、5・15・51…圧
電素子、6・16・50…固定部材、7・17・58…印字ワイヤ、52
・53・55・56…結合部、18…第一の結合部、19…第二の結
合部、12…Ｔ字形部材、13…Ｕ字形部材。1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged perspective view showing the connection of hinges in the embodiment of FIG. 1, and FIG. 3 is an operating state of the embodiment. Is a perspective view showing
FIG. 4 is a side view showing an example of a conventional printing hammer, (a)
Shows a non-operating state, (b) shows an operating state, 5th
FIG. 6 is a perspective view showing another embodiment of the conventional printing hammer, FIG.
FIG. 7 is an enlarged perspective view showing the arrangement of hinges in the embodiment shown in FIG. 5, and FIG. 7 is a perspective view showing the operating state of the embodiment shown in FIG. 1.11.54.57 ... arm, 2.12b '... first hinge, 3.13b'
... Second hinge, 4.13c '... Third hinge, 5.15.51 ... Piezoelectric element, 6.16.50 ... Fixing member, 7.17.58 ... Printing wire, 52
53.55.56 ... joint portion, 18 ... first joint portion, 19 ... second joint portion, 12 ... T-shaped member, 13 ... U-shaped member.
Claims (1)
部に第一の結合部を有するアームと、一方の端部を前記
第一の結合部に接続し他方の端部を第二の結合部に接続
した薄板状の第一のヒンジと、前記第一のヒンジの幅方
向の左右に配設され前記第一のヒンジに対してその厚さ
方向に対して所定の寸法に等しい段差を有し、前記第一
の結合部にその一端を接続し他方の端部を固定部材に接
続した薄板状の第二および第三のヒンジと、一方の端部
を前記第二の結合部に固定し他方の端部を前記固定部材
に固定した圧電素子とから構成され、前記第一のヒンジ
は薄板状のＴ字形の部材で構成され、前記第二および第
三のヒンジは一枚の薄板状のＵ字形の部材で構成され、
前記第一の結合部に設けた２本の溝にそれぞれ前記Ｔ字
形部材および前記Ｕ字形部材の一端を挿入しろう接し、
前記Ｔ字形部材の他端は前記第二の結合部に設けた溝に
挿入しろう接し、前記Ｕ字形部材の他端は前記固定部材
に設けた溝に挿入しろう接したことを特徴とする印字ハ
ンマ。Claim: What is claimed is: 1. An arm having a print wire fixed to one end thereof and a first connecting portion at the other end, and one arm connected to the first connecting portion and the other end being connected to the first connecting portion. A thin plate-shaped first hinge connected to the second coupling portion and arranged on the left and right in the width direction of the first hinge and having a predetermined dimension in the thickness direction with respect to the first hinge. Thin plate-shaped second and third hinges having a step, one end of which is connected to the first coupling portion and the other end of which is connected to a fixing member, and one end portion of which is the second coupling portion And a piezoelectric element having the other end fixed to the fixing member, the first hinge is a thin plate-shaped T-shaped member, and the second and third hinges are one sheet. It is composed of thin U-shaped members,
One end of each of the T-shaped member and the U-shaped member is inserted into and brazed to the two grooves provided in the first coupling portion,
The other end of the T-shaped member is inserted into and brazed into a groove provided in the second coupling portion, and the other end of the U-shaped member is inserted into and brazed into a groove provided in the fixing member. Printing hammer.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62218236A JPH066381B2 (en) | 1987-08-31 | 1987-08-31 | Printing hammer |
| US07/153,371 US4886382A (en) | 1987-02-09 | 1988-02-08 | Printing hammer comprising two hinge parts coupling an arm to a base member on both sides of a hinge coupling the arm to a piezoelectric actuator |
| EP88101877A EP0285766B1 (en) | 1987-02-09 | 1988-02-09 | Printing hammer provided with a piezoelectric actuator |
| DE8888101877T DE3870298D1 (en) | 1987-02-09 | 1988-02-09 | PRINT HAMMER WITH PIEZOELECTRIC ACTUATOR. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62218236A JPH066381B2 (en) | 1987-08-31 | 1987-08-31 | Printing hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6461259A JPS6461259A (en) | 1989-03-08 |
| JPH066381B2 true JPH066381B2 (en) | 1994-01-26 |
Family
ID=16716733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62218236A Expired - Lifetime JPH066381B2 (en) | 1987-02-09 | 1987-08-31 | Printing hammer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066381B2 (en) |
-
1987
- 1987-08-31 JP JP62218236A patent/JPH066381B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6461259A (en) | 1989-03-08 |
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