JPH0691866A - Ink jet head - Google Patents

Ink jet head

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Publication number
JPH0691866A
JPH0691866A JP24768092A JP24768092A JPH0691866A JP H0691866 A JPH0691866 A JP H0691866A JP 24768092 A JP24768092 A JP 24768092A JP 24768092 A JP24768092 A JP 24768092A JP H0691866 A JPH0691866 A JP H0691866A
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Prior art keywords
shape memory
ink chamber
ink
memory alloy
volume
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JP24768092A
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Japanese (ja)
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JP2615319B2 (en )
Inventor
Yoshihiro Kondo
宣裕 近藤
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Seikosha Co Ltd
株式会社精工舎
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Abstract

PURPOSE:To obtain an ink jet head having a shape memory alloy with an improved reliability, a reduced size, and an enhanced density. CONSTITUTION:A pressurizing vibration body 4 is heated by a drive circuit 5. In this manner, firstly, a first shape memory allay 2 reaches a transformation temperature and changes into a matrix phase, thus expanding a volume of an ink chamber 1. Next, a second shape memory alloy 3 reaches a transformation temperature and changes into a matrix phase, thus reducing a volume of the ink chamber 1. A volume change from the volume of the ink chamber 1 at the first transformation temperature to the volume of the ink chamber 1 at the next transformation temperature results in ink liquid being pressurized and jetted out of a nozzle 7 as an ink liquid drop.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、インクジェットプリンタに用いられるインクジェットヘッドにおいて、特に複数のインク噴出ノズルを有するマルチノズルタイプのインクジェットヘッドに関するものである。 The present invention relates to an ink jet head used in an ink jet printer, and more particularly to multi-nozzle type ink jet head having a plurality of ink ejection nozzles.

【0002】 [0002]

【従来の技術】ドロップ・オン・デマンド型のインクジェットプリンタの方式として、印字情報信号に応じて、 As a method of the Prior Art drop-on-demand type ink jet printer in accordance with print information signals,
インク室に付設された加圧振動機構である圧電素子にパルス電圧を印加して、上記圧電素子を変形させて、インク室の容積を変化させ、この中のインク液圧を加圧し、 The piezoelectric element is a pressure vibration mechanism that is attached to the ink chamber by applying a pulsed voltage, to deform the piezoelectric element, to change the volume of the ink chamber, the ink pressure in the pressurized,
インク室と連通するヘッド先端のノズルから、インク液滴を噴出させて、離間対向する記録用紙等の記録媒体に印字する方法がとられている。 From the nozzle of the head tip communicating with the ink chamber, thereby ejecting ink droplets, a method for printing on a recording medium such as recording paper to be spaced opposite has been taken.

【0003】このような、マルチノズルタイプのインクジェットプリンタでは、記録密度の向上とヘッドの小型化が望まれるが、圧電素子の電気から機械的変形への変換効率が低いため、圧電素子の大きさを小さくできず、 [0003] Such a multi-nozzle type ink jet printer, but improves the head size of the recording density is desired, due to the low efficiency of conversion to mechanical deformation from electrical piezoelectric element, the size of the piezoelectric element the can not be small,
高密度化や小型化が困難である。 High density and miniaturization is difficult.

【0004】現在、インクジェットヘッドの小型化と高密度記録を実現させるため、圧電素子を用いた加圧振動機構に代る新たな加圧振動機構が試みられている。 [0004] Currently, in order to realize high-density recording size of the ink jet head, a new pressure vibration mechanism in place of the pressure vibration mechanism using a piezoelectric element it has been tried. 例えば、特開昭63−57251号公報に開示されるインクジェットヘッドのように加圧振動機構として、機械的変形の大きな形状記憶合金とそれを加熱する加熱手段とを組み合わせたものを用いたものがある。 For example, the pressure vibration mechanism as the ink jet head disclosed in JP-A-63-57251, those using a combination of a heating means for heating it with greater shape memory alloy mechanical deformation is there.

【0005】 [0005]

【発明が解決しようとする課題】上記の形状記憶合金を用いた加圧振動機構では、一般的形状記憶合金の特性として、変態温度以上に加熱され母相に戻る際の形状は安定しているものの、変態温度以下のいわゆるマルテンサイト相の形状は、熱処理等で記憶されるが、不安定な面がある。 In pressure vibration mechanism using THE INVENTION to be solved INVENTION The above shape memory alloy, the characteristics of a general shape memory alloy, the shape in returning to the mother phase heated above the transformation temperature is stable Although, the shape of the transformation temperature below the so-called martensite phase is stored in the heat treatment or the like, there is an unstable surface. このため、変態温度以下では、インク室の容積を一定に維持するのは難しく、元の形状に比べてある程度の誤差を生じる。 Therefore, the following transformation temperature, it is difficult to maintain the volume of the ink chamber constant, resulting in some degree of error compared to the original shape. この誤差によりインクの噴出特性が変化するため、印字品質の劣化の原因となる。 The error for varying the ejection characteristics of the ink, causing print quality degradation.

【0006】本発明は、形状記憶合金を用いたインクジェットヘッドの信頼性の向上と、小型化と、高密度化とを目的とする。 [0006] The present invention aims the improvement of reliability of the ink jet head using a shape memory alloy, and downsizing, and a high density.

【0007】 [0007]

【課題を解決するための手段】本発明は、変態温度の異なる第1および第2の形状記憶合金を積層して加圧振動体を構成し、この加圧振動体をインク室に付設し加熱することにより、インク室と連通したノズルからインク液を射出するよう構成することにより、上記目的を達成するものである。 The present invention SUMMARY OF] is by laminating the first and second shape memory alloys different transformation temperatures constitutes a pressurized 圧振 body, and attached the pressurized 圧振 body in the ink chamber heated by, by configuring to eject ink liquid from a nozzle communicating with the ink chamber is configured to achieve the above object.

【0008】上記加圧振動体は、室温より高い第1の温度以上で上記インク室の容積を拡大する方向に変形し、 [0008] The pressurized 圧振 body is deformed in a direction to increase the volume of the ink chamber at a higher first temperature above room temperature,
かつ第1の温度より高温の第2の温度以上で上記インク室の容積を縮小する方向に変形することが好ましい。 And it is preferable to deform in a direction to reduce the volume of the ink chamber in the first second temperature above the temperature higher than the temperature.

【0009】 [0009]

【実施例】本発明の一実施例のインクジェットヘッドについて図を参照しながら説明する。 Referring to FIG. Will be described EXAMPLES inkjet head of an embodiment of the present invention. 図1は本発明のの構成を示す説明図であり、同図において、Xはインクジェットヘッド部であり、図1においては図2のA−A線での断面が示されている。 Figure 1 is an explanatory view showing the configuration of the present invention, in the figure, X is an inkjet head portion, the cross section at A-A line in FIG. 2 are shown in FIG. 1はインク室であり、長さ10 1 denotes an ink chamber, the length 10
0〜10000μm、幅50〜500μmである。 0~10000μm, it is the width 50~500μm.

【0010】2は第1の形状記憶合金であり、3は第2 [0010] 2 is the first shape memory alloy, 3 the second
の形状記憶合金であり、これらを積層固定することにより加圧振動体4を構成している。 A shape memory alloy, and constitutes a pressurized 圧振 body 4 by these are laminated and fixed. これらの形状記憶合金としては、Ni−Ti系合金や、Cu−Zn−Al系合金等を用いることが可能であり、本例では、Ni−Ti These shape memory alloys, and Ni-Ti alloy, it is possible to use a Cu-Zn-Al-based alloy, in this example, Ni-Ti
系合金を使用することとする。 And the use of system alloy.

【0011】このNi−Ti系形状記憶合金の硬さと温度変化の様子は次のとうりである。 [0011] hardness and how the temperature change of the Ni-Ti based shape memory alloy is next Tori. 例えば、長さ40m For example, length 40m
m、幅8.9mm、厚さ0.32mmの合金において、 m, width 8.9 mm, in an alloy having a thickness of 0.32 mm,
長さ方向に1.5mmの変位量を得るのに必要とする押付力は、マルテンサイト相である20°Cでは約0.3 Pressing force required to obtain a displacement amount of 1.5mm in the longitudinal direction is about the 20 ° C martensitic phase 0.3
5Nであるが、変態温度80°Cとしてそれ以上の温度の母相では、約1.9Nとなり、マルテンサイト相でのそれの5倍以上となる。 Is a 5N, the parent phase of higher temperature as the transformation temperature 80 ° C, approximately 1.9N, and the more than five times that of martensite phase.

【0012】また、その変態温度は、合金の組成により可変であり、例えば、50at%Niでの変態温度は約80°Cであり、Niの組成が0.1at%ずれると、 Furthermore, the transformation temperature is variable depending on the composition of the alloy, for example, the transformation temperature at 50at% Ni is about 80 ° C, the composition of the Ni deviates 0.1 at%,
10°C低くなる。 10 ° C lower.

【0013】以上のような特性のNi−Ti系形状記憶合金からなる第1の形状記憶合金2は、厚み約100μ [0013] The first shape memory alloy 2 made of Ni-Ti based shape memory alloy of characteristics such as described above, a thickness of about 100μ
m、面積0.1〜10mm 2であり、第2の形状記憶合金3の上面に積層され、マルテンサイト相での形状は、 m, the area 0.1 to 10 mm 2, is laminated on the upper surface of the second shape memory alloy 3, the shape in the martensite phase,
平面形であり、変態温度を約50°Cとし、その温度を越えた母相での形状は、図1の上方に撓むように形成されている。 A planar, a transformation temperature of about 50 ° C, the shape of the mother phase beyond its temperature, and is formed to deflect upward in Fig.

【0014】同様にNi−Ti系形状記憶合金からなる第2の形状記憶合金3は、厚み約250μm、面積0. [0014] Similarly, the second shape memory alloy 3 consisting of Ni-Ti based shape memory alloy has a thickness of about 250 [mu] m, the area 0.
1〜10mm2であり、インク室1の上面に付設されその外周を固定してあり、マルテンサイト相での形状は、 A 1~10Mm2, is attached to the upper surface of the ink chamber 1 are fixed to the outer peripheral shape of the martensite phase,
平面形であり、変態温度を約60°Cとし、その温度を越えた母相での形状は、下方に撓むように形成されている。 A planar, a transformation temperature of about 60 ° C, the shape of the mother phase exceeds the temperature is formed to deflect downward.

【0015】上記第1の形状記憶合金2および第2の形状記憶合金3を積層固定してなる加圧振動体4は、上記温度50°C、60°Cにおいて形状を変化させ、インク室1の容積を拡大、縮小させ、同内のインクを加圧する。 [0015] The first shape memory alloy 2 and the second shape memory alloy 3 pressurized 圧振 body 4 formed by laminating fix changes the shape at the temperature 50 ° C, 60 ° C, the ink chamber 1 expanding the volume, it is reduced, pressurizing ink in the same.

【0016】なお、本例において加圧振動体4は第1の形状記憶合金2を上に第2の形状記憶合金3を下にして積層固定してなるが、この上下の順を変更しても同様の動作が可能である。 [0016] Incidentally, pressurized 圧振 elements 4 in this example is formed by the second shape memory alloy 3 is laminated and fixed facing down on the first shape memory alloy 2, by changing the order of the upper and lower It can also be the same operation.

【0017】5は加熱手段としての駆動回路であり、制御回路(図示せず)の印字情報信号を受け、加圧振動体4に1kHzの矩形波を通電し、加圧振動体4を加熱する。 [0017] 5 is a drive circuit as a heating unit, receives the print information signal of the control circuit (not shown), the square wave of 1kHz to pressurized 圧振 body 4 is energized to heat the pressurized 圧振 body 4 . 6は供給手段としてのインク流路であり、この深さは10〜100μmである。 6 denotes an ink flow path as the feed means, the depth is 10 to 100 [mu] m. これはインク室1に連通しており、インク室1にインクを供給する。 It communicates with the ink chamber 1, for supplying ink to the ink chamber 1. 7はノズルであり、直径10〜100μmである。 7 is a nozzle, the diameter 10 to 100 [mu] m. これはインク室1 This is the ink chamber 1
に連通しており、加圧振動体4により加圧されたインク液を射出する。 It communicates with, to eject ink fluid pressurized by pressurized 圧振 body 4.

【0018】次に動作について、図1、図3、図4、を参照しながら説明する。 [0018] Next, the operation, FIG. 1, FIG. 3 will be described with reference to FIG.

【0019】まず、制御回路(図示せず)の印字情報信号を受けた駆動回路5は、加圧振動体4に1kHzの矩形波を通電する。 Firstly, the driving circuit 5 which has received the print information signal of the control circuit (not shown) energizes a rectangular wave of 1kHz to pressurized 圧振 body 4. 通電により加圧振動体4は加熱される。 Pressurized 圧振 body 4 is heated by energization.

【0020】ここで図3には、温度変化に伴なうインク室1の容積変化を示してある。 [0020] Here, in FIG. 3 shows the volume change of the accompanying ink chamber 1 to a temperature change. 同図においては、マルテンサイト相をマルテンと表し、インク室1の容積の変化がな無い場合の形状であれば同じと表し、容積が拡大する形状の場合には拡大と表し、容積が縮小する形状の場合には縮小と表してある。 In the figure, represents the martensite phase and martensite, if the shape of the case changes in the volume of the ink chamber 1 is not Do the same as expressed, expressed as expansion when a shape expanding volume, reduced volume If the shape is represented with the reduction. 同図を用いて室温より60° 60 ° from the room temperature using a drawing
C以上になり再び室温になる過程に従って加圧振動体4 Pressurized 圧振 body according the process again to room temperature becomes higher in the C 4
の動作を説明する。 To explain the operation.

【0021】まず、室温から50°Cまでの温度範囲では、第1の形状記憶合金2および第2の形状記憶合金3 [0021] First, in the temperature range from room temperature to 50 ° C, the first shape memory alloy 2 and the second shape memory alloy 3
はともにマルテンサイト相の状態であり、いずれの形状記憶合金も形状変化を示さない。 Both the state of the martensite phase, any shape memory alloys do not show a shape change. このときインク室1の形状は図4に示される初期状態の形状となる。 In this case the ink chamber 1 shape is the shape of the initial state shown in FIG.

【0022】50°C以上で60°Cより低い温度範囲では、第1の形状記憶合金2が母相であり、事前に記憶された形状に変化する。 [0022] In a temperature range lower than 60 ° C at 50 ° C or more, the first shape memory alloy 2 is the mother phase changes to pre-memorized shape. ここでは上方に撓む形状を示す。 Here shows the shape to flex upward. 第2の形状記憶合金3はマルテンサイト相の状態にあり、形状変化を示さない。 Second shape memory alloy 3 is in the state of the martensite phase, exhibit no shape change.

【0023】このとき第1の形状記憶合金2の厚さ(1 [0023] At this time, the first shape the thickness of the memory alloy 2 (1
00μm)に対して第2の形状記憶合金の厚さ(250 00Myuemu) with respect to the thickness of the second shape memory alloy (250
μm)は厚いが、第1の形状記憶合金の変化は母相によるものであり、母相での押付力はマルテンサイト相でのそれの約5倍であるため、この第1の形状記憶合金2の形状変化は、第2の形状記憶合金3をも上方に撓ませ、 [mu] m) is thick, the change of the first shape memory alloy is due to the matrix phase, because the pressing force of the mother phase is about 5 times that in the martensite phase, the first shape memory alloy 2 of shape change, also flexed upwardly a second shape memory alloy 3,
加圧振動体4は上方に撓む。 Pressurized 圧振 body 4 is bent upward. これによりインク室1の形状は、図4に示すように容積を拡大する。 Thus the ink chamber 1 shape, expanding the volume, as shown in FIG. インク室1が容積を拡大することによりインク供給効率の向上にもつながる。 Also leads to an improvement in the ink supply efficiency by ink chamber 1 is expanded in volume.

【0024】60°C以上の温度範囲では、第1の形状記憶合金2および第2の形状記憶合金3はともに母相の状態となり、第1の形状記憶合金2は下方へ撓もうとし、第2の形状記憶合金3は上方へ撓もうとする。 [0024] In 60 ° C above temperature range, the first shape memory alloy 2 and the second shape memory alloy 3 are both in the state of the matrix phase, the first shape memory alloy 2 is trying to deflect downward, the 2 of shape memory alloy 3 is going to deflect upward. このように第1の形状記憶合金2と第2の形状記憶合金3とは互いに逆向の形状変化を行なおうとするが、第1の形状記憶合金2の厚さ(100μm)に対して第2の形状記憶合金の厚さ(250μm)は厚いために、第2の形状記憶合金3は第1の形状記憶合金2をも下方に撓ませ、加圧振動体4は下方に撓む。 Thus although the first shape memory alloy 2 and the second shape memory alloy 3 wishing to make a change in shape of GyakuMuko each other, the relative thickness of the first shape memory alloy 2 (100 [mu] m) 2 the thickness of the shape memory alloy (250 [mu] m) in order thick, the second shape memory alloy 3 is also flexed downward a first shape memory alloy 2, pressurized 圧振 body 4 is bent downward. これにより、加圧振動体4は図4に示すようにインク室容積を縮小し、インクを加圧しノズル7よりインク液滴を射出する。 Thus, pressurized 圧振 elements 4 is reduced ink chamber volume, as shown in FIG. 4, to eject ink droplets from the pressurized nozzle 7 ink.

【0025】インク液滴の射出の後、駆動回路よりの電流の通電が停止され、温度が下りはじめると、加熱の場合とは逆の過程を経て初期状態に戻る。 [0025] After the injection of ink droplets, energization current from the driving circuit is stopped, the temperature starts down, returns to the initial state through the reverse process to the case of heating. まず60°Cより低くなると第2の形状記憶合金がマルテンサイト相となり、第1の形状記憶合金によりインク室1は容積を拡大される。 First 60 ° C than the lower when the second shape memory alloy becomes martensitic phase, the ink chamber 1 by the first shape memory alloy is larger volume. 温度が50°Cより低くなると第1の形状記憶合金もマルテンサイト相となり初期状態に戻る。 The first shape memory alloy when the temperature drops below 50 ° C also returns to the initial state becomes a martensite phase.

【0026】以上のように加圧振動体4のインク噴出動作は、インク室1の拡大、縮小の二つの動作をともない、それぞれの形状が第1の形状記憶合金と第2の形状記憶合金の母相で規定されるため、初期状態にかかわらず、安定した形状変化となり、インクの噴出特性が安定し、印字品質が安定する。 The above ink jet operation of the pressurized 圧振 body 4, the expansion of the ink chamber 1, with the two operations of reduction, each of the shape of the first shape memory alloy and a second shape memory alloy since defined by the matrix phase, regardless of the initial state, it becomes stable shape changes, ejection characteristics of the ink are stabilized, printing quality is stabilized. また、冷却され初期状態に戻る際も、一度インク室1の容積を拡大する動作を行なうため、すばやくインク補給がなされ、高速化できる。 Further, even when returning to the initial state is cooled once to perform the operation to expand the volume of the ink chamber 1, quickly the ink supply is performed, can be made faster.

【0027】なお上記の例では第1の形状記憶合金2および第2の形状記憶合金3のそれぞれの変態温度を50 It should be noted in the above example the respective transformation temperature of the first shape memory alloy 2 and the second shape memory alloy 3 50
°Cと60°Cとしたが、変態温度はそれら形状記憶合金の形成段階でさまざまに設定でき、変更可能である。 ° and C and 60 ° C, but the transformation temperature can variously set in the formation stage of their shape memory alloys can be changed.

【0028】例えば第1の形状記憶合金2の変態温度を室温より低く設定し、室温では常に母相での形状に維持する。 [0028] For example the first transformation temperature of the shape memory alloy 2 is set lower than the room temperature and maintained in the shape of always the mother phase at room temperature. これにより加圧振動体4は室温では常時、インク室1の容積を拡大する形状となり、上記のインク室1の形状を示す図4に示される初期状態が無くなり、加圧振動体の動作は、拡大と縮小の二つの動作となる。 Thus pressurized 圧振 elements 4 is always at room temperature, a shape to expand the volume of the ink chamber 1, there is no initial state shown in FIG. 4 showing the ink chamber 1 shape, the operation of the pressurizing 圧振 moving object, enlarge the two operations of reduction. このように変更しても上記の例と同様の効果を得ることが可能である。 Changing this way it is possible to obtain the same effect as in the example.

【0029】 [0029]

【発明の効果】加圧振動体に変態温度の異なる第1の形状記憶合金と第2の形状記憶合金を用い、それぞれの母相によりインク室の最小容積と、最大容積が決まるため、インク液の加圧に要する容積変化は常に一定のものとなり、射出されるインク液の量や射出圧等が一定となり、安定したインク射出が行なえる。 Using a pressurized 圧振 moving object transformation temperature of different first shape memory alloy and a second shape memory alloy according to the present invention, the minimum volume of the ink chamber by the respective parent phase, because the maximum volume is determined, the ink liquid volume required for pressure changes pressure is always that of the constant, the ink liquid amount and injection pressure and the like to be emitted becomes constant, enables stable ink ejection is. これにより小型で信頼性の高いインクジェットヘッドが実現可能となる。 This compact and reliable ink jet head can be realized by.

【0030】特に、加圧振動体に所望の温度以上で上記インク室の容積を拡大する方向に変形し、かつ上記所望の温度より高温の所定の温度以上で上記インク室の容積を縮小する方向に変形するものを用いることで、加圧振動体によるインク液の加圧に要する容積変化が大きいため、インク室自体の容積を小さく形成でき、小型高密度化の面では効果的である。 [0030] In particular, the direction of reducing the desired deformed in a direction to increase the volume of the ink chamber above a temperature, and the desired higher temperature than the temperature of the ink chamber volume at a predetermined temperature or more pressurized 圧振 body by using those deformed, because the volume change needed to pressurization of the ink by pressurizing 圧振 body is large, the volume of the ink chamber itself can turn formed small, it is effective in terms of size densification.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例のインクジェットヘッドの構成を示す説明図。 Figure 1 is an explanatory diagram showing the structure of an ink jet head of an embodiment of the present invention.

【図2】図1の要部の平面図。 Figure 2 is a plan view of a main part of FIG.

【図3】図1の動作の説明のための説明図。 FIG. 3 is an explanatory view for explaining the operation of FIG. 1.

【図3】図1の動作の説明のための説明図。 FIG. 3 is an explanatory view for explaining the operation of FIG. 1.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 インク室 2 第1の形状記憶合金 3 第2の形状記憶合金 4 加圧振動体 5 加熱手段 6 供給手段 7 ノズル 1 ink chamber 2 first shape memory alloy 3 second shape memory alloy 4 pressurized 圧振 body 5 the heating means 6 supply means 7 nozzle

───────────────────────────────────────────────────── ────────────────────────────────────────────────── ───

【手続補正書】 [Procedure amendment]

【提出日】平成5年3月15日 [Filing date] 1993 March 15,

【手続補正1】 [Amendment 1]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】図面の簡単な説明 A brief description of the correction target item name] drawings

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例のインクジェットヘッドの構成を示す説明図。 Figure 1 is an explanatory diagram showing the structure of an ink jet head of an embodiment of the present invention.

【図2】図1の要部の平面図。 Figure 2 is a plan view of a main part of FIG.

【図3】図1の動作の説明のための説明図。 FIG. 3 is an explanatory view for explaining the operation of FIG. 1.

【図4】図1の動作の説明のための説明図。 FIG. 4 is an explanatory view for explaining the operation of FIG. 1.

【符号の説明】 1 インク室 2 第1の形状記憶合金 3 第2の形状記憶合金 4 加圧振動体 5 加熱手段 6 供給手段 7 ノズル [Reference Numerals] 1 ink chamber 2 first shape memory alloy 3 second shape memory alloy 4 pressurized 圧振 body 5 the heating means 6 supply means 7 nozzle

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 インク室と、変態温度の異なる第1の形状記憶合金と第2の形状記憶合金とを積層してなり上記インク室内のインク液圧を加圧する上記インク室に付設された加圧振動体と、上記加圧振動体を加熱する加熱手段と、上記インク室にインクを供給する供給手段と、上記加圧振動体により加圧されたインク液を射出する上記インク室と連通したノズルとを具備するインクジェットヘッド。 1. A and the ink chamber, is attached to the ink chamber for pressurizing the different first shape memory alloy and the ink pressure of the ink chamber formed by laminating a second shape memory alloys the transformation temperature vulcanizing and 圧振 body, heating means for heating the pressurized 圧振 body, a supply means for supplying ink to the ink chamber, communicating with said ink chamber to eject ink fluid pressurized by the pressurizing 圧振 body an inkjet head comprising a nozzle.
  2. 【請求項2】 上記加圧振動体は、室温より高い第1の温度以上で第1の形状記憶合金が母相となり、上記インク室の容積を拡大する方向に変形し、かつ第1の温度より高温の第2の温度以上で第2の形状記憶合金が母相となり、上記インク室の容積を縮小する方向に変形することを特徴とする請求項1記載のインクジェットヘッド。 Wherein said pressurizing 圧振 moving object, the first shape memory alloy is the mother phase at temperatures above room first temperature or more, it deforms in a direction to increase the volume of the ink chamber, and a first temperature more second shape memory alloy is the mother phase at a high temperature of the second temperature or more, the ink-jet head according to claim 1, wherein the deformation in the direction of reducing the volume of the ink chamber.
  3. 【請求項3】 上記加圧振動体は、室温では第1の形状記憶合金が母相であり、上記インク室の容積を拡大する方向に変形しており、かつ室温より高温の第3の温度以上で第2の形状記憶合金が母相となり、上記インク室の容積を縮小する方向に変形することを特徴とする請求項1記載のインクジェットヘッド。 Wherein said pressurizing 圧振 body is a first shape memory alloy matrix at room temperature, and deforms in a direction to increase the volume of the ink chamber, and a third temperature above room temperature of the hot or the second shape memory alloy becomes the matrix phase, the inkjet head according to claim 1, wherein the deformation in the direction of reducing the volume of the ink chamber.
JP24768092A 1992-09-17 1992-09-17 The ink-jet head Expired - Fee Related JP2615319B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24768092A JP2615319B2 (en) 1992-09-17 1992-09-17 The ink-jet head

Publications (2)

Publication Number Publication Date
JPH0691866A true true JPH0691866A (en) 1994-04-05
JP2615319B2 JP2615319B2 (en) 1997-05-28

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