JPH0255149A - Motion converter for piezoelectric element - Google Patents
Motion converter for piezoelectric elementInfo
- Publication number
- JPH0255149A JPH0255149A JP63206539A JP20653988A JPH0255149A JP H0255149 A JPH0255149 A JP H0255149A JP 63206539 A JP63206539 A JP 63206539A JP 20653988 A JP20653988 A JP 20653988A JP H0255149 A JPH0255149 A JP H0255149A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- movable element
- piezoelectric
- main frame
- movable
- 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.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 230000036316 preload Effects 0.000 description 10
- 238000000926 separation method Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Impact Printers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、主として印字ヘッドに採用される圧電素子
の運動変換装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a motion converting device for a piezoelectric element mainly employed in a print head.
（従来の技術）
圧電素子の運動変換装置としては、例えば、すでに同一
出願人によって開発がなされた特願昭６２−２７７１６
９号、特願昭６２−２６８４９６号等に開示されたもの
がある。(Prior Art) As a motion converting device for a piezoelectric element, for example, Japanese Patent Application No. 62-27716 developed by the same applicant is known.
No. 9, Japanese Patent Application No. 62-268496, etc.
また、このような圧電矛、子の運動変換装置は、第９図
に示すように、圧電水子１の伸縮に基づいて可動子５を
変位さ′μ、フレーム２と可動子；３どの相互に一端部
が固着された一対の板ばね６，７を１尭まけることで、
これら両板ばね６，７の他端部に跨って結合された傾動
体８を傾動さけるようになっている。In addition, as shown in FIG. 9, such a piezoelectric piston/child motion conversion device displaces the movable element 5 based on the expansion and contraction of the piezoelectric water element 1, and the mutual relationship between the frame 2 and the movable element 3. By placing a pair of leaf springs 6 and 7 with one end fixed to the
A tilting body 8 coupled to the other end portions of both leaf springs 6 and 7 is prevented from being tilted.
また、前記フレーム２の基部３、「電素子１、及び可動
子７の粗角状態を維持したり、あるい（よ圧電素子１の
伸縮運動をｉＪ動子５に確実に伝達させるために、前記
基部３、可動子５及び圧電水子１の相互の対向面はそれ
ぞれ接石剤等によって一体状に結合されている。In addition, in order to maintain the rough angle state of the base 3 of the frame 2, the electronic element 1, and the movable element 7, or to ensure that the expansion and contraction movement of the piezoelectric element 1 is transmitted to the iJ movable element 5, The mutually facing surfaces of the base portion 3, the movable element 5, and the piezoelectric water element 1 are each integrally connected by a contact agent or the like.
（発明が解決しようどする課題）
ところで、前記したように構成される運動変換装置−に
おいて、可動子５及び運動変換機構（一対の板ばね６．
７ど傾動体８とを主体として構成される）の質量に基づ
く慣性力によって、ＥＥ電索子１の伸縮運動に対し、可
動子５の往復運動に遅れが生じる。特に、圧Ｔ１索子１
に対し電圧の印加が断たれ、同圧電索子１が元の状態に
収縮され、可動子５が元の位置まで復帰する際、前記圧
電素子１の収縮に比し、可動子５の復帰が遅れる場合が
ある。づると、圧電索子１には可動子５の復帰遅れに伴
って引張力が作用する。そして、引張力に脆い特性を有
する圧電セラミックより圧電素子１が構成されている場
合には、前記引張力によって圧電素子１が損傷されると
いう問題点があった。(Problems to be Solved by the Invention) By the way, in the motion conversion device configured as described above, the movable element 5 and the motion conversion mechanism (a pair of leaf springs 6.
Due to the inertial force based on the mass of the movable member 7 and the tilting member 8, there is a delay in the reciprocating motion of the movable member 5 with respect to the expansion and contraction motion of the EE cable 1. In particular, pressure T1 cord 1
When the voltage is cut off, the piezoelectric cable 1 is contracted to its original state, and the movable element 5 returns to its original position, the return of the movable element 5 is greater than the contraction of the piezoelectric element 1. There may be delays. In other words, a tensile force acts on the piezoelectric cord 1 due to the delay in the return of the movable element 5. When the piezoelectric element 1 is made of a piezoelectric ceramic having a property of being brittle under tensile force, there is a problem that the piezoelectric element 1 is damaged by the tensile force.
この発明の目的は、圧電素子の伸縮運動と可動子の往復
運動との動的な差が原因となって圧電素子に作用する引
張力を可及的に軽減することで、圧電素子の損傷を防止
することができる運動変換装置を提供することである。The purpose of this invention is to reduce as much as possible the tensile force that acts on the piezoelectric element due to the dynamic difference between the expansion and contraction movement of the piezoelectric element and the reciprocating movement of the movable element, thereby preventing damage to the piezoelectric element. It is an object of the present invention to provide a motion conversion device that can prevent the above.
（課題を解決ケるための手段）
前記目的を達成するために、この発明は、圧電素子の伸
縮方向一端を支持する基部を有づるメインフレームと、
前記圧電素子の伸縮方向他端に配設された可動子と、こ
の可動子に連結され、前記圧電素子の伸縮運動を拡大す
る運動変換機構とを備えた運動変換装置であって、前記
基部、可動子及び圧電素子の相互の対向面のうち、少な
くとも１箇所の対向面に接離可能な非結合部を設けた構
成にしたものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a main frame having a base that supports one end of the piezoelectric element in the expansion and contraction direction;
A motion conversion device comprising: a movable element disposed at the other end of the piezoelectric element in the expansion/contraction direction; and a motion conversion mechanism connected to the movable element and magnifying the expansion/contraction movement of the piezoelectric element, the base; Among the mutually opposing surfaces of the movable element and the piezoelectric element, at least one opposing surface is provided with a non-coupling portion that can be brought into contact with and separated from the movable element.
（作 用）
前記したように構成される圧電素子の運動変換装置にお
いて、圧電１素子に対する電圧の印加が断たれ、同圧電
素子が元の状態に収縮され、可動子が元の位置まで復帰
する際、前記可動子の復帰の、！！れに伴って非結合部
が接離することで、前記可動子の復帰の遅れが原因とな
って前記圧電素子に作用する引張力を可及的に軽減する
ことができる。(Function) In the piezoelectric element motion conversion device configured as described above, the application of voltage to one piezoelectric element is cut off, the piezoelectric element is contracted to its original state, and the movable element returns to its original position. When the movable element returns,! ! As a result, the uncoupled portions move toward and away from each other, thereby making it possible to reduce as much as possible the tensile force that acts on the piezoelectric element due to the delay in return of the movable element.
（実施例）
以下、この発明の一実施例を第１図〜第８図に従って説
明する。(Example) An example of the present invention will be described below with reference to FIGS. 1 to 8.
この実施例では印字ヘッドに採用したものを例示するも
のであって、第１図と第２図において、電圧の印加によ
って伸縮する圧電素子１は、積層状をなす圧電セラミッ
クより構成されている。This embodiment exemplifies the use of a print head, and in FIGS. 1 and 2, the piezoelectric element 1, which expands and contracts when a voltage is applied, is made of laminated piezoelectric ceramic.
前記メモ電累子１を支持するためのメインフレーム２は
、その圧電素子１の伸縮方向とほぼ平行して延在するＩ
Ｉｉ長四角形・で所定板厚の金属板より構成されている
。このメインフレーム２の一端部には圧電素子１の伸縮
方向一端（下端）を後述する温度補旧材１２及び予圧部
材１３を介して支持するための基部３が横方向に突設さ
れている。また、前記メインフレーム２の両側面には、
圧電索子１のリード線１４を案内するための案内溝２ａ
や、［１軽減のための凹部２ｂが形成されている。The main frame 2 for supporting the memo element 1 has an I-shaped frame extending substantially parallel to the direction of expansion and contraction of the piezoelectric element 1.
It is made of a rectangular metal plate with a predetermined thickness. A base 3 is provided at one end of the main frame 2 to protrude in the lateral direction for supporting one end (lower end) of the piezoelectric element 1 in the expansion/contraction direction via a temperature repair material 12 and a preload member 13, which will be described later. Furthermore, on both sides of the main frame 2,
Guide groove 2a for guiding the lead wire 14 of the piezoelectric cord 1
A concave portion 2b is formed for the reduction of [1].
前記圧電素子１の伸縮方向他＠（ト端）には前記メイン
フレーム２の立上り部の上端部と対向した状態においで
、０■動子５が配設されている。前記可動子５とメイン
フレーム２との対向面には、一対の板ばね６，７がその
一端部においてろう伺げによって固着されＣいる。前記
両板ばね６．７の板幅はメインフレーム２並びに可動子
５の板厚よりも所定量だけ幅広に形成され、各板ばね６
゜７の幅方向両側縁がメインフレーム２並びに可動子５
の板厚面よりそれで突出した状（ｇでろう付けされるこ
とで、メインフレーム２並びに可動子５に対する各板ば
ね６，７の固着力が高められている。さらに、前記両板
ばね６，７は、所定の隙間を隔てて対向するとどもに、
メインフレーム２及びｉｌ動子５の上端面よりＪｉ電素
子１の伸縮方向に所定長さだけ延出されている。そして
、両板ばね６．７の他端部（延出端部）には傾動体８が
両板ばね６，７ど一体に結合された状態で形成されてい
る。また、前記両板ばね６，７の対向面反対側には、前
記メインフレーム２及び可動子５の上端面から傾動体８
の下端部にわたる範囲において、凹部６ａ、７ａがそれ
ぞれ形成され、これによって薄肉部とされた部分をそれ
ぞれ弾性変形部６ｂ。At the other end of the piezoelectric element 1 in the expansion/contraction direction, a 0.times. mover 5 is disposed so as to face the upper end of the rising portion of the main frame 2. A pair of leaf springs 6 and 7 are fixed at one end of the movable member 5 and the main frame 2 by soldering at one end thereof. The plate width of both plate springs 6.7 is formed wider than the plate thickness of the main frame 2 and mover 5 by a predetermined amount.
Both edges in the width direction of ゜7 are the main frame 2 and mover 5
The adhesion force of each leaf spring 6, 7 to the main frame 2 and the mover 5 is increased by brazing the leaf springs 6, 7 to the main frame 2 and the mover 5. 7 faces each other across a predetermined gap,
It extends a predetermined length from the upper end surfaces of the main frame 2 and the IL mover 5 in the direction of expansion and contraction of the Ji electric element 1. A tilting body 8 is formed at the other end (extending end) of both leaf springs 6.7 in a state in which both leaf springs 6, 7 are integrally connected. Further, on the opposite side of the opposing surfaces of both the leaf springs 6 and 7, a tilting body 8 is provided from the upper end surface of the main frame 2 and the movable element 5.
Recesses 6a and 7a are respectively formed in the range extending over the lower end of , and the thinned portions thereby become elastically deformable portions 6b.
７ｂとしている。さ°らに、ｏ１動子５側に固着された
板ばね７の弾性変形部７ｂの板ｖｔ２は、メインフレー
ム２側に固着された板ばね６の弾性変形部６ｂの板厚ｔ
１よりも厚肉に設定されており、可動子５側の板ばね７
の弾性強度が高められている。これによって可動子５側
の板ばね７の座屈や折屓が積極的に防止され、耐久性の
向上が図られている。7b. Furthermore, the plate vt2 of the elastically deformable portion 7b of the plate spring 7 fixed to the o1 mover 5 side has a thickness t of the elastically deformable portion 6b of the plate spring 6 fixed to the main frame 2 side.
The plate spring 7 on the movable element 5 side is set to be thicker than 1.
The elastic strength of the material is increased. This actively prevents the leaf spring 7 on the side of the movable element 5 from buckling or breaking, thereby improving durability.
前記傾動体８には、前記両板ばね６，７の配置方向に平
行してアーム取付溝８ａが凹設されており、このアーム
取付溝８ａには傾動アーム１０がその基部において挿入
されかつろう付けによって固着されている。前記傾動ア
ーム１０の先端部には切欠き状のワイヤ取付溝１０ａが
形成され、このワイヤ取付Ｈ１０ａには、印字ワイヤ１
１の基端部が挿入されかつろう付けによって固着されて
いる。そして、前記両板ばね６，７、傾動体８、傾動ア
ーム１０及び印字ワイヤ１１によって圧電素子１の伸縮
運動を拡大する運動変換機構が構成されている。なお、
前記傾動体８は、第１図に示１ように、両板ばね６，７
の幅方向両側部に対する部分がりノ欠き状に削除されて
おり、軽ｆｉｌ化が図られている。さらに、傾動アーム
１０には軽量化のための大小の貫通孔９が適宜に回設さ
れている。The tilting body 8 has an arm mounting groove 8a recessed in parallel to the arrangement direction of the leaf springs 6 and 7, and the tilting arm 10 is inserted into the arm mounting groove 8a at its base. It is fixed by attaching it. A cutout-shaped wire attachment groove 10a is formed at the tip of the tilting arm 10, and the printing wire 1 is inserted into the wire attachment groove H10a.
The proximal end of 1 is inserted and secured by brazing. The plate springs 6 and 7, the tilting body 8, the tilting arm 10, and the printing wire 11 constitute a motion conversion mechanism that magnifies the expansion and contraction motion of the piezoelectric element 1. In addition,
The tilting body 8 has both leaf springs 6 and 7 as shown in FIG.
Parts on both sides in the width direction have been removed in the form of notches to reduce the thickness. Further, the tilting arm 10 is provided with through holes 9 of appropriate sizes for weight reduction.
１）０記メインフレーム２の基部３にはりブフレム４が
その一端部において一体に形成されている。1) A beam frame 4 is integrally formed at one end of the base 3 of the main frame 2.
そして、サブフレーム４は、圧電素子１の他側（メイン
フレーム２と反対側）に沿ってかつ前記ｒ］ ！＋３子
５に対向する位置まで延出されている。Then, the subframe 4 extends along the other side of the piezoelectric element 1 (the side opposite to the main frame 2) and the above r]! It extends to a position opposite to the +3 child 5.
前記サブフレーム４の延出端部と可動子５との間には圧
電素子１の伸縮に基づいて、その伸縮方向と平行に可動
子５を案内するための四節の平行リンク機構１６が配設
されている。この平行リンク機構１６は、第４図に示す
ように、−枚の弾性変形可能な板ばね材をブレスの打１
友き加工並びに折曲げ加工することで形成された一対の
リンクプレート１７と、これら両リンクプレート１７を
一体に結合している結合部２６を主体として構成されて
いる。A four-bar parallel link mechanism 16 is disposed between the extending end of the subframe 4 and the movable element 5 for guiding the movable element 5 in parallel to the expansion and contraction direction of the piezoelectric element 1 based on the expansion and contraction of the piezoelectric element 1. It is set up. This parallel link mechanism 16, as shown in FIG.
It is mainly composed of a pair of link plates 17 formed by bending and bending, and a connecting portion 26 that connects both link plates 17 together.
一対のリンクプレート１７は、圧電素子１の伸縮方向と
平行づる縦リンク部１８．１９と、これら両組リンク部
１８．１９の間に弾ゼ［ゆ形可能なヒンジ部２２，２３
，２４．２５をしって架設された横リンク部２０．２１
とをそれぞれ備えて四節の平行リンクをなしている。そ
して、両リンクプレート１７の各一方の縦リンク部１８
は、リブフレーム４の両側面にスポット溶接等によって
固着され、各他方の縦リンク部１９は、可動子５の両側
面にそれぞれスポット溶接等によって固着されている。The pair of link plates 17 includes a vertical link portion 18.19 extending parallel to the direction of expansion and contraction of the piezoelectric element 1, and a deformable hinge portion 22, 23 that is elastic between both sets of link portions 18.19.
, 24.25, the horizontal link section 20.21 was constructed.
and form four parallel links. And, each one of the vertical link portions 18 of both link plates 17
are fixed to both sides of the rib frame 4 by spot welding or the like, and each other vertical link part 19 is fixed to both sides of the movable element 5 by spot welding or the like.
さらに、可動子５の両側面に固着された各縦リンク部１
９の先端に跨って結合部２６が一体に形成され、この結
合部２６は可動子５の上端面に所定隙間を隔てて配置さ
れる。Furthermore, each vertical link part 1 fixed to both sides of the movable element 5
A coupling portion 26 is integrally formed across the tip of the movable element 9, and this coupling portion 26 is arranged on the upper end surface of the movable element 5 with a predetermined gap therebetween.
また、この実施例において、前記各−・方の縦リンク部
１８の下部には、連結プレート３０がその一〇＝部にお
いて一体に形成されている。前記各連結プレート３０は
前記メインフレーム２の側面まで延出されている１、ざ
らに、各連結プレート３０の両端部はメインフレーム２
とサブフレーム４との側面にそれぞれスポット溶接等に
よって固着されている。これによってメインフレーム２
に対し→ノブフレーム４が平行に保たれるとともに、各
フレーム２．４の剛性が高められている。Further, in this embodiment, a connecting plate 30 is integrally formed at the lower part of each vertical link part 18 at the 10= part. Each of the connecting plates 30 extends to a side surface of the main frame 2.Roughly speaking, both ends of each connecting plate 30 extend to the side of the main frame 2.
and the side surfaces of the subframe 4, respectively, by spot welding or the like. This allows mainframe 2
→The knob frame 4 is kept parallel, and the rigidity of each frame 2.4 is increased.
また、この実施例において、前記リンクプレート１７並
びに連結プレート３０が配置される部位にＪ３いて、そ
のプレートの厚さに相当する分だけメインフレーム２．
すブフレーム４及び可動子５の板厚が軽減されており、
これによってメインフレーム２及びサブフレーム４の板
厚内にａ３いてリンクプレート１７及び連結プレート３
０が組イク１（〕られ、装置の小型化が図られている。Further, in this embodiment, the main frame 2 is located at a portion J3 where the link plate 17 and the connecting plate 30 are arranged, and the main frame 2 is located at a portion corresponding to the thickness of the plate.
The plate thickness of the subframe 4 and mover 5 is reduced,
As a result, the link plate 17 and the connecting plate 3 are
0 is set to 1 (), thereby reducing the size of the device.
さらに、リンクプレート１７の各ヒンジ部２２〜２５及
び各横リンク部２０．２１が配置される部位にＪ３いて
、前記各ヒンジ部及び各横リンク部がサブフレーム４の
側面に接触することがないようにには同サブフレーム４
の延出端部薄肉部４ａが形成されている。Further, since each hinge portion 22 to 25 and each horizontal link portion 20.21 of the link plate 17 are located at a portion J3, each hinge portion and each horizontal link portion do not come into contact with the side surface of the subframe 4. The same subframe 4
A thin walled portion 4a is formed at the extending end.
前記サブフレーム４と可動子５どの間に前記リンクプレ
ート１７及び連結プレート３０が組ｆ」けられた後、メ
インフレーム２の基部３と可動子５どの間に、圧電素子
１及び温度補償材１２が予圧部材１３によって所定ｒＬ
力だけ予Ｆ１された状態で組イ；１りられる。After the link plate 17 and the connecting plate 30 are assembled between the sub-frame 4 and the movable element 5, the piezoelectric element 1 and the temperature compensation material 12 are placed between the base 3 of the main frame 2 and the movable element 5. is set to a predetermined value rL by the preload member 13.
With only the force being pre-F1, the group is removed.
なお、予圧部材１３は上板１３ａと両側板１３ｂどを備
えて逆Ｕ字状に形成される。そして、予圧部材１３は、
前記基部３の上面に跨って上下動自在に嵌込まれた後、
温度補償材１２の１ζ而を前配子圧部材１３の上板１３
ａ上面に当接させるとともに、予圧部材１３を押上げな
がら温度補償材１２上の圧電素子１の他端面を後述する
接離層３１．３２を介して可動子５の下面に所定荷重で
圧接させた状態のもとで、前記予圧部材１３の両側板１
３ｂが前記基部３の両側面にスポット溶接によって固着
固着される。また、前記４度補償材１２は、圧電素子１
の負の温度１１１Ｉ！ｌ脹率特性とは逆の正の４度線膨
［帯持性を有する材料、例えば亜鉛材やアルミ材によっ
て構成されている。そして、周囲の温度変化ににる圧電
素子１の伸縮を、温度補償料１２の上下方向の伸びによ
って修正し、圧電系子１の上面高さを常に一定に保つよ
うになっている。The preload member 13 is formed into an inverted U shape, including an upper plate 13a and both side plates 13b. And, the preload member 13 is
After being fitted so as to be vertically movable across the upper surface of the base 3,
1ζ of the temperature compensating material 12 is attached to the upper plate 13 of the front pressure member 13.
a The other end surface of the piezoelectric element 1 on the temperature compensating material 12 is brought into contact with the lower surface of the movable element 5 with a predetermined load via contact layers 31 and 32, which will be described later, while pushing up the preload member 13. In this state, both side plates 1 of the preload member 13
3b are firmly fixed to both sides of the base 3 by spot welding. Further, the fourth degree compensating material 12
The negative temperature of 111I! It is made of a material that has a positive fourth-degree expansion property, which is opposite to the expansion rate characteristic, such as zinc material or aluminum material. The expansion and contraction of the piezoelectric element 1 due to changes in ambient temperature is corrected by the vertical expansion of the temperature compensation material 12, so that the height of the top surface of the piezoelectric element 1 is always kept constant.
さて、前記基部３に固着の予圧部材１３、温度補償材１
２、圧電素子１及び可動子５との相互の対向面のうち、
少なくとも１箇所の対向面には接＃１可能な非結合部３
３が設けられている。この実施例において、［ｆｆｆｌ
ｉ素子１と可動子５との相互の対向面に非結合部３３が
設けられている。さらに、前記非結合部３３には例えば
ジルコニアセラミックのような耐摩耗性に優れる材質よ
りなる−・対の接１）１１Ｆｉ３１，３２が設けられる
。そして、これら一対の接離層３１．３２の対向面は接
離可能に当接し、同接離層３１．３２の対向面の反対側
は圧電索子１の端面と可動子５の下面とにそれぞれ接着
剤によって一体状に結合されている。Now, the preload member 13 and the temperature compensator 1 are fixed to the base 3.
2. Among the mutually facing surfaces of the piezoelectric element 1 and the movable element 5,
Unbonded portion 3 that can be in contact with at least one opposing surface
3 is provided. In this example, [fffl
A non-coupling portion 33 is provided on the mutually opposing surfaces of the i-element 1 and the movable element 5. Further, the non-bonded portion 33 is provided with a pair of contacts 1) 11Fi 31 and 32 made of a material with excellent wear resistance such as zirconia ceramic. The opposing surfaces of the pair of contact and separation layers 31 and 32 are in contact with each other so as to be able to move into and out of contact, and the opposite side of the opposing surfaces of the contact and separation layers 31 and 32 is on the end surface of the piezoelectric cord 1 and the lower surface of the movable element 5. Each is integrally bonded with adhesive.
また、圧電素子１と温度補償材１２との相互の対向面並
びに温度補償材１２と予圧部材１３との相互の対向面は
接着剤によってそれぞれ一体状に結合されている。Further, the mutually opposing surfaces of the piezoelectric element 1 and the temperature compensating material 12 and the mutually opposing surfaces of the temperature compensating material 12 and the preload member 13 are each integrally bonded with an adhesive.
また、この実施例において、可動子５の下部の幅方向両
縁部には切欠き状の四部５ａがそれぞれ形成され、これ
によって幅が狭められた部分を弾性伸縮部５ｂとしてい
る。さらに、前記可動子５の弾性伸縮部５ｂは板ばね７
の弾性変形部７ｂよりも剛性が高くかつ圧電素子１の伸
縮方向に微＆ｌに弾性伸縮可能に形成されχいる。Further, in this embodiment, four cutout-shaped parts 5a are formed at both widthwise edges of the lower part of the movable element 5, and the narrowed portions thereby serve as elastic stretchable parts 5b. Further, the elastic stretchable portion 5b of the movable element 5 is formed by a plate spring 7.
It has higher rigidity than the elastically deformable portion 7b, and is formed to be able to elastically expand and contract slightly in the direction of expansion and contraction of the piezoelectric element 1.
上述したように構成されるこの実施例において、Ｌｌ−
電素子１の両電極間に電圧が印加されると、圧電系子１
は、その積層方向、すなわち、第２図に４３いて矢印Ｘ
方向に所定長さだけ伸び、これに基づいて可動子５が変
位される。すると、可動子５の変位力を受けで可動子５
側の板ばね７が、メインル−ム２側の板ばね６に沿って
押上げられ、両板ばね６．７が湾曲状に撓む、特に可動
子５側の板ばね７がメインフレーム２側の板ばね６に向
けて大きく撓むことで、第２図において矢印Ｐ方向に回
転モーメントが付し、これによって、傾動体８が傾動さ
れる。In this embodiment configured as described above, Ll-
When a voltage is applied between both electrodes of the piezoelectric element 1, the piezoelectric element 1
is the stacking direction, that is, the arrow X at 43 in FIG.
It extends by a predetermined length in the direction, and the movable element 5 is displaced based on this. Then, due to the displacement force of the mover 5, the mover 5
The leaf spring 7 on the side is pushed up along the leaf spring 6 on the main room 2 side, and both leaf springs 6.7 are bent in a curved shape.In particular, the leaf spring 7 on the mover 5 side is pushed up along the leaf spring 6 on the main frame 2 side. By largely bending toward the leaf spring 6, a rotational moment is applied in the direction of arrow P in FIG. 2, and the tilting body 8 is thereby tilted.
前記圧電索子１の伸びに基づいて可動子５が変位される
ときには、四節の平行リンク機構１６を構成しＣいる各
リンクプレート１７によって可動子５が圧電素子１の伸
縮方向と平１ｊに案内される。When the movable element 5 is displaced based on the elongation of the piezoelectric cable 1, the movable element 5 is moved in the direction of expansion and contraction of the piezoelectric element 1 and the plane 1j by each link plate 17 that constitutes the four-bar parallel link mechanism 16. You will be guided.
このため、ｊＩＪｗＪ子５の傾きが原因となる両板ばね
６．７の撓み没の不足が防止されることから、傾動体８
を所定の傾動角度位置まで傾動させることができる。そ
して、傾動体８先喘の印字ワイヤ１１が所定数の案内部
材１５に案内された状態で、その先端が印字位置まで前
進される。このようにして、可動子５側の板ばね７がメ
インフレーム２側の根ばね６よりも大きくかつ不足なく
撓むことで、傾動体８を所定角度位置まで確実に傾動さ
せることができるとともに、圧電素子１の伸びが茗しく
拡大されて印字ワイヤ１１に伝達され、これによって印
字不良を防止することができる。Therefore, insufficient deflection of both leaf springs 6.7 caused by the inclination of the jIJwJ child 5 is prevented, so that the tilting body 8
can be tilted to a predetermined tilt angle position. Then, with the printing wire 11 at the tip of the tilting body 8 being guided by a predetermined number of guide members 15, its tip is advanced to the printing position. In this way, the leaf spring 7 on the movable element 5 side is bent more and more fully than the root spring 6 on the main frame 2 side, thereby making it possible to reliably tilt the tilting body 8 to a predetermined angular position. The elongation of the piezoelectric element 1 is gently expanded and transmitted to the printing wire 11, thereby making it possible to prevent printing defects.
圧電素子１に対する電圧の印加が断たれると、圧電索子
１は元の状態に短縮される。すると、１１Ｉ動子５、両
板ばね６，７及び傾動体８が元の状態に復帰され、印字
ワイヤ１１が後退復帰される。When the voltage is no longer applied to the piezoelectric element 1, the piezoelectric cord 1 is shortened to its original state. Then, the 11I mover 5, both leaf springs 6 and 7, and the tilting body 8 are returned to their original states, and the printing wire 11 is returned to its original position.
前記圧電素子１が元の状態に短縮され、可動子５が元の
位置に復帰される際、可動子５、板ばね６．７、傾動体
８、傾動７−ム１０及び印字ワイヤ１１の多質ｍに基づ
く慣性力によって、前記圧電系子１の短縮よりも可動子
５の復帰が遅れる。When the piezoelectric element 1 is shortened to its original state and the movable element 5 is returned to its original position, the movable element 5, the leaf spring 6.7, the tilting body 8, the tilting member 10 and the printing wire 11 are Due to the inertial force based on the quality m, the return of the movable element 5 is delayed compared to the shortening of the piezoelectric system 1.
すると、前記可動子５の復帰の遅れに伴って一対の接離
層３１．３２がその対向面において微Ｍに離反する。こ
のため、前記可動子５の復帰の遅れが原因となって圧電
素子１に作用する引張力が可及的に軽減される。Then, due to the delay in the return of the movable element 5, the pair of contact and separation layers 31 and 32 are separated by a slight M on their opposing surfaces. Therefore, the tensile force acting on the piezoelectric element 1 due to the delay in return of the movable element 5 is reduced as much as possible.
なお、前述した実施例においては、圧電素子１と可動子
５との相互の対向面に非結合部３３を設けたが、これに
限るものではない。In addition, in the above-described embodiment, the non-coupling portion 33 was provided on the mutually opposing surfaces of the piezoelectric element 1 and the movable element 5, but the present invention is not limited to this.
例えば、第５図に示すように、メインフレーム２の基部
３に固着された予圧部材１３と、圧電素子１の一端に接
着剤によって結合された温度補償材１２との相互の対向
面に接離可能な非結合部３３を設けてもよい。さらに、
萌記非結合部３３に耐摩耗性並びに断熱性を有するジル
コニアセラミックよりなる接離層３１．３２を設けた場
合には、温度補償材１２に伝導される圧電素子１の発生
熱を前記接離層３１．３２の断熱性によって遮断するこ
とができる。このため、圧電素子１からの発生熱によっ
て温度補償材１２が効率よく伝導加熱され、温度補償材
１２の補償機能を有効に働かセることができる。For example, as shown in FIG. 5, a preload member 13 fixed to the base 3 of the main frame 2 and a temperature compensator 12 bonded to one end of the piezoelectric element 1 with an adhesive come into contact with and separate from each other on opposing surfaces. A possible non-coupling portion 33 may also be provided. moreover,
When the contact and separation layers 31 and 32 made of zirconia ceramic having wear resistance and heat insulation properties are provided in the non-bonded portion 33, the heat generated by the piezoelectric element 1 conducted to the temperature compensating material 12 is transferred to the contact and separation layers 31 and 32 made of zirconia ceramic having wear resistance and heat insulation properties. This can be achieved by the insulation properties of layers 31,32. Therefore, the temperature compensating material 12 is efficiently conductively heated by the heat generated from the piezoelectric element 1, and the compensation function of the temperature compensating material 12 can be effectively operated.
また、前記実施例においては、非結合部３３に設けられ
ている接離Ｆｉ３１．３２をジルコニアピラミックより
形成したが、これに限るものではない。例えば、第６図
に示すように、薄肉の合成樹脂フィルムより接１ｌｌｌ
ｔ層３１．３２を形成してもよい。Furthermore, in the embodiment described above, the contact and separation Fi 31 and 32 provided in the non-coupled portion 33 are made of zirconia pyramid, but the present invention is not limited to this. For example, as shown in FIG.
T-layers 31 and 32 may also be formed.
さらに、前記実施例では非結合部３３に一対の接離層３
１，３２を設けたが、これに限るものではない。例えば
第７図に示すように、非結合部３３に一枚の接ｙａＪ１
３１を設けてもよい。Furthermore, in the above embodiment, a pair of separation layers 3 are provided in the non-bonded portion 33.
1 and 32, but it is not limited to this. For example, as shown in FIG.
31 may be provided.
さらに、接離層３１．３２を設けることなく、例えばメ
インフレーム２の３３部３、可動子５、［を電素子１等
の相互の対向面のうち、少なくとも１箇所の対向面を接
離可能に直接当接させてもよい。Furthermore, at least one opposing surface of the mutually opposing surfaces of the main frame 2, the movable member 5, the electric element 1, etc., can be brought into contact and separated without providing the contact and separation layers 31 and 32. It may be brought into direct contact with the
また、前記実施例においては、メインフレーム２の基部
３の予圧部材１３と圧電素子１との間に温度補償材１２
を組付けたが、これに限るものではない。例えば、第８
図に示すように、可動子５と圧電素子１との間に温度補
償材１２や接離層３１３２を組付けてもよい。Further, in the embodiment, a temperature compensating material 12 is provided between the preload member 13 of the base 3 of the main frame 2 and the piezoelectric element 1.
was installed, but it is not limited to this. For example, the 8th
As shown in the figure, a temperature compensating material 12 and a separation layer 3132 may be assembled between the movable element 5 and the piezoelectric element 1.
さらに、前記実施例においては、メインフレーム２の基
部３、圧電素子１、可動子５等の相互の対向面のうち、
１箇所のみに接離可能な非結合部３３を設け、その他の
対向面は接着剤によって一体状に結合したが、これに限
るものではなく、非結合部３３を２箇所以上の複数箇所
に設けてもよい。Furthermore, in the embodiment, among the mutually opposing surfaces of the base 3 of the main frame 2, the piezoelectric element 1, the mover 5, etc.
Although the non-bonding portion 33 that can be brought into contact and separation is provided at only one location, and the other opposing surfaces are integrally bonded with adhesive, the present invention is not limited to this, and the non-bonding portion 33 is provided at two or more locations. It's okay.
（発明の効果）
以上述べたように、この発明は、メインフレームの基部
、可動子及び圧電素子の相互の対向面のうら、少なくと
も１箇所の対向面に接離可能な非結合部を設けた圧電素
子の運動変換装置であるから、前記圧電素子に対する電
圧の印加が断たれ、同圧７１１子が元の状態に収縮され
、ｔ＋Ｊ動子が元の位置まで復帰する際、前記可動子の
復帰の遅れに伴って非結合部が接離することで、ｎａ記
記動動子復帰の遅れが原因となって前記圧電素子に作用
する引張力を可及的に軽減することができる。この結果
、引張力に脆い特性を有する圧電セラミックより圧電素
子を構成した場合にも、その圧電素子の損傷を防止して
耐久性の向上を図ることができるという効果がある。(Effects of the Invention) As described above, the present invention provides a non-coupling portion that can be brought into contact with and separated from the base of the main frame, behind the opposing surfaces of the mover and the piezoelectric element, and on at least one opposing surface. Since this is a motion conversion device for a piezoelectric element, when the application of voltage to the piezoelectric element is cut off, the same pressure element 711 contracts to its original state, and the t+J element returns to its original position, the movable element returns to its original position. By bringing the uncoupled portion into contact and separating with the delay, it is possible to reduce as much as possible the tensile force that acts on the piezoelectric element due to the delay in the return of the recording element. As a result, even if the piezoelectric element is made of a piezoelectric ceramic that is susceptible to tensile forces, damage to the piezoelectric element can be prevented and durability can be improved.
図面の第１図〜第８図はこの発明の一実施例を示すもの
で、第１図は印字ヘッドに作用される圧電素子の運動変
換Ｒ置を示す斜視図、第２図は同じく側面図、第３図は
第２図のＩ−Ｉ線断面図、第４図は四節の平行リンクｄ
構を示す斜視図、第５図、第６図、第７図及び第３３図
は他の実施例をそれぞれ示す側面図である。第９図は先
行技術のものを示り側面図ぐある。
１・・・圧電素子
２・・・メインフレーム
６７・・・板 ば ね
８・・・傾 動 体
１０・・・傾動アーム
１２・・・温度補償材
３１．３２・・・接 離 層
３３・・・非結合部
出願人 ブラｌｊ−工業株式会社
代理人 弁理士 岡１］１英彦（外３名）笛
図
第
図1 to 8 of the drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view showing the motion conversion R position of the piezoelectric element applied to the print head, and FIG. 2 is a side view. , Fig. 3 is a sectional view taken along line I-I in Fig. 2, and Fig. 4 is a four-section parallel link d.
A perspective view showing the structure, and FIGS. 5, 6, 7, and 33 are side views showing other embodiments, respectively. FIG. 9 shows the prior art in side view. 1...Piezoelectric element 2...Main frame 67...Plate spring 8...Tilt body 10...Tilt arm 12...Temperature compensation material 31.32...Contact layer 33... ...Uncombined Part Applicant Bralj-Kogyo Co., Ltd. Agent Patent Attorney Oka 1] 1 Hidehiko (3 others) Flute Diagram
Claims (1)
フレームと、前記圧電素子の伸縮方向他端に配設された
可動子と、この可動子に連結され、前記圧電素子の伸縮
運動を拡大する運動変換機構とを備えた運動変換装置で
あって、 前記基部、可動子及び圧電素子の相互の対向面のうち、
少なくとも１箇所の対向面に接離可能な非結合部を設け
たことを特徴とする圧電素子の運動変換装置。[Scope of Claims] A main frame having a base that supports one end of the piezoelectric element in the expansion and contraction direction, a movable element disposed at the other end of the piezoelectric element in the expansion and contraction direction, and a main frame that is connected to the movable element and that supports the piezoelectric element. A motion converting device comprising a motion converting mechanism that magnifies expansion and contraction motion, wherein the base, the movable element, and the piezoelectric element each have mutually opposing surfaces,
1. A motion conversion device for a piezoelectric element, characterized in that a non-coupling portion that can be brought into contact with and taken away from it is provided on at least one opposing surface.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63206539A JPH0692158B2 (en) | 1988-08-19 | 1988-08-19 | Piezoelectric motion converter |
| US07/375,403 US5028834A (en) | 1988-07-21 | 1989-07-03 | Device for magnifying displacement of piezoelectric element and method of producing same |
| EP89307280A EP0352075B1 (en) | 1988-07-21 | 1989-07-19 | Device for magnifying displacement of piezoelectric element |
| DE89307280T DE68909859T2 (en) | 1988-07-21 | 1989-07-19 | Device for increasing the displacement of a piezoelectric element. |
| KR1019890010193A KR0121752B1 (en) | 1988-07-21 | 1989-07-19 | Device for magnifying displacement of piezoelectric element and method of producing the same |
| CN89104925A CN1039505A (en) | 1988-07-21 | 1989-07-20 | The device of amplifying piezo-electric element displacement and make the method for this device |
| US07/397,751 US4979275A (en) | 1987-06-09 | 1989-08-23 | Device for magnifying displacement of piezoelectric element or the like and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63206539A JPH0692158B2 (en) | 1988-08-19 | 1988-08-19 | Piezoelectric motion converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0255149A true JPH0255149A (en) | 1990-02-23 |
| JPH0692158B2 JPH0692158B2 (en) | 1994-11-16 |
Family
ID=16525048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63206539A Expired - Lifetime JPH0692158B2 (en) | 1987-06-09 | 1988-08-19 | Piezoelectric motion converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0692158B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292201A (en) * | 1991-11-18 | 1994-03-08 | Fujitsu Limited | Printing head of wire-dot impact printer |
| EP3287346A1 (en) | 2016-08-26 | 2018-02-28 | Toyota Jidosha Kabushiki Kaisha | Vehicle frame body manufacuring method and vehicle frame structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59150756A (en) * | 1983-02-17 | 1984-08-29 | Nec Corp | Printing mechanism |
-
1988
- 1988-08-19 JP JP63206539A patent/JPH0692158B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59150756A (en) * | 1983-02-17 | 1984-08-29 | Nec Corp | Printing mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5292201A (en) * | 1991-11-18 | 1994-03-08 | Fujitsu Limited | Printing head of wire-dot impact printer |
| EP3287346A1 (en) | 2016-08-26 | 2018-02-28 | Toyota Jidosha Kabushiki Kaisha | Vehicle frame body manufacuring method and vehicle frame structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0692158B2 (en) | 1994-11-16 |
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