JPH111001A - Ink jet recording head - Google Patents

Ink jet recording head

Info

Publication number
JPH111001A
JPH111001A JP15697197A JP15697197A JPH111001A JP H111001 A JPH111001 A JP H111001A JP 15697197 A JP15697197 A JP 15697197A JP 15697197 A JP15697197 A JP 15697197A JP H111001 A JPH111001 A JP H111001A
Authority
JP
Japan
Prior art keywords
recording
recording head
recording medium
projection
nozzle
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.)
Pending
Application number
JP15697197A
Other languages
Japanese (ja)
Inventor
Tomoyuki Kubo
智幸 久保
Original Assignee
Brother Ind Ltd
ブラザー工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brother Ind Ltd, ブラザー工業株式会社 filed Critical Brother Ind Ltd
Priority to JP15697197A priority Critical patent/JPH111001A/en
Publication of JPH111001A publication Critical patent/JPH111001A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To improve accuracy of a landing position of an ink drop. SOLUTION: A projection 2 is attached to a side face of a recording head 1 in an advancing direction and the face of the projection at a side of a recording medium is roughly flushed with a nozzle face. A face 2a at the opposite side is made to be an inclined face such that it rises toward the side of the recording head from the end of the projection. As a result, an air flow generated by virtue of the advancing of the recording head 1 hardly enters a portion between the nozzle face and recording medium, thereby reducing influence of the air flow to ink drops.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、インクジェット記
録ヘッドに関する。
[0001] The present invention relates to an ink jet recording head.
【0002】[0002]
【従来の技術】従来、インクジェット記録装置は、図3
に示すように記録ヘッド1をキャリッジ5に搭載し、図
示しない駆動部によって軸6に導かれて被記録体7に沿
って矢印の送り方向に移動させる。そして、記録ヘッド
1で図示しない複数のノズルからインクを下方に噴射
し、被記録体7に記録を行う。一行の記録が終わると被
記録体7を送り、次の行の記録に移る。
2. Description of the Related Art Conventionally, an ink jet recording apparatus is shown in FIG.
The recording head 1 is mounted on the carriage 5 as shown in FIG. 1, and is guided by the drive unit (not shown) on the shaft 6 and is moved along the recording medium 7 in the direction indicated by the arrow. Then, the recording head 1 ejects ink downward from a plurality of nozzles (not shown) to perform recording on the recording medium 7. When the recording of one line is completed, the recording medium 7 is sent, and the process proceeds to the recording of the next line.
【0003】図5において、記録ヘッド1の移動によっ
て、記録ヘッドの側面に押された気流は、記録ヘッドと
被記録体の間に比較的強い気流となって入り込む。ノズ
ル11から速度Vkで噴射されたインクは、キャリッジ
の移動速度及び気流速度Vaとの合成速度によって、被
記録体7の記録点Kに着弾する。また、インクが噴射さ
れた後にインク滴が垂れてくることがあるが、このイン
ク滴はほとんどが重力による落下速度Vhと気流速度V
aによって、記録点Kと離れた点Hに飛沫となって落ち
る。
[0005] In FIG. 5, an airflow pushed to the side of the recording head by the movement of the recording head 1 enters a relatively strong airflow between the recording head and the recording medium. The ink ejected from the nozzle 11 at the speed Vk lands on the recording point K of the recording medium 7 at a combined speed with the moving speed of the carriage and the airflow speed Va. Also, ink droplets may droop after the ink is ejected, but these ink droplets are mostly dropped by gravity Vh and airflow velocity Vh.
Due to a, it falls as a droplet at a point H distant from the recording point K.
【0004】これによって、被記録体7に記録された所
を拡大して見ると、図4のように予め定めた基準格子8
の交点上にインクが噴射されて記録点Kと呼ぶ記録用の
点の近くに、インクが噴射された後についてくるインク
滴が記録されることがあった。
As a result, when the place recorded on the recording medium 7 is enlarged, as shown in FIG.
In some cases, ink droplets are ejected near the recording point called the recording point K when the ink is ejected on the intersection of the ink droplets.
【0005】[0005]
【発明が解決しようとする課題】噴射されたインク滴の
記録点9は、上記のようにキャリッジの移動速度、噴射
速度Vk、気流速度Vaによって決まるが、気流速度は
外部からの流入もあって常に一定ではないので、記録点
9は不規則になる。しかも、従来の技術は上述したよう
に、必要としない飛沫点10を生ずることがあり、図5
に示す常に一定でない気流速度Vaにより記録点9と共
に不規則になり、図4のように飛沫点10が記録点9か
らはみ出すこともあった。
The recording point 9 of the ejected ink droplet is determined by the moving speed of the carriage, the ejection speed Vk, and the airflow speed Va as described above, but the airflow speed also includes an inflow from the outside. The recording points 9 are irregular since they are not always constant. In addition, as described above, the conventional technique may generate an unnecessary droplet point 10 as shown in FIG.
As shown in FIG. 4, the airflow velocity Va is not always constant and becomes irregular together with the recording point 9, and the droplet point 10 sometimes protrudes from the recording point 9 as shown in FIG.
【0006】本発明の目的は、上述した問題点を解決す
るためになされたものであり、記録点と飛沫点の着弾位
置の精度を向上するインクジェット記録ヘッドを提供す
ることである。
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide an ink jet recording head which improves the accuracy of the landing positions of recording points and splash points.
【0007】[0007]
【課題を解決するための手段】この目的を達成するため
に、請求項1の発明では、被記録体に対し相対移動しな
がらノズル面からインクを噴射して記録する記録ヘッド
において、移動の際に記録ヘッドの相対進行方向から生
じる気流が前記ノズル面と被記録体の間に入り込むこと
をおさえるように、記録ヘッドの進行方向に突出した突
起物を付けたことを特徴とする。
In order to achieve this object, according to the first aspect of the present invention, there is provided a recording head for ejecting ink from a nozzle surface and recording while moving relative to a recording medium. A projection protruding in the traveling direction of the recording head is provided so as to suppress an airflow generated from the relative traveling direction of the recording head from entering between the nozzle surface and the recording medium.
【0008】請求項2では、請求項1において、前記突
起物は、被記録体側の面をノズル面とほぼ同一平面と
し、それと反対側の面を、突起物の突出端から記録ヘッ
ド側に向け上昇する傾斜面としたことを特徴とする。
According to a second aspect of the present invention, in the first aspect, the surface of the projection on the recording medium side is substantially flush with the nozzle surface, and the surface on the opposite side is directed from the protruding end of the projection toward the recording head. It is characterized by a rising slope.
【0009】この発明によれば、記録ヘッドと被記録体
との相対進行により生ずる気流が記録ヘッドと被記録体
の間に入り込む際、突起物によりノズル面より上部の気
流は外へ流れ、噴射されたインクに当たる気流速度が小
さくなり、記録点の着弾位置のずれを従来より小さくす
ることができる。しかも、突起物を、被記録体側の面を
ノズル面とほぼ同一平面とし、それと反対側の面を、突
起物の突出端から記録ヘッド側に向け上昇する傾斜面と
することで、気流は効果的に上方へ逃げ、着弾位置のず
れを一層小さくすることができる。
According to the present invention, when the airflow generated by the relative advance between the recording head and the recording medium enters between the recording head and the recording medium, the airflow above the nozzle surface flows outward due to the projections, and is ejected. The velocity of the airflow hitting the ejected ink becomes smaller, and the deviation of the landing position of the recording point can be made smaller than before. In addition, the airflow is effective because the surface of the recording medium on the side of the recording medium is substantially flush with the nozzle surface, and the surface on the opposite side is an inclined surface that rises from the protruding end of the projection toward the recording head. As a result, the landing position can be further reduced, and the displacement of the landing position can be further reduced.
【0010】[0010]
【発明の実施の形態】この発明の実施の形態を図1およ
び図2に示す。
1 and 2 show an embodiment of the present invention.
【0011】記録ヘッド1が、図3のように、キャリッ
ジに搭載され、インクを噴射する多数のノズル孔を有す
るノズル面12を被記録体7に対向させ、被記録体7に
沿って移動しながらインクを噴射して記録するのは、従
来の装置と同様である。
As shown in FIG. 3, a recording head 1 is mounted on a carriage and moves along a recording medium 7 with a nozzle surface 12 having a plurality of nozzle holes for ejecting ink facing the recording medium 7. Recording by ejecting ink while recording is the same as in a conventional apparatus.
【0012】本実施の形態において、記録ヘッド1の被
記録体側の端部に、記録ヘッドの進行方向の両側に突出
した突起物2を設けている。この突起物2は、被記録体
側の面をノズル面12とほぼ同一平面とし、それと反対
側の面2aを、突起物の突出端から記録ヘッド側に向け
上昇する傾斜面としている。
In this embodiment, at the end of the recording head 1 on the side of the recording medium, there are provided projections 2 projecting on both sides in the traveling direction of the recording head. The surface of the protrusion 2 on the recording medium side is substantially flush with the nozzle surface 12, and the surface 2a on the opposite side is an inclined surface that rises from the protruding end of the protrusion toward the recording head.
【0013】このように構成することで、記録ヘッド1
の進行により生ずる気流が記録ヘッドと被記録体7の間
に入り込む際、突起物2によりノズル面12より上部の
気流は外へ流れ、噴射されたインクに当たる気流速度が
小さくなり、記録点の着弾位置のずれを従来より小さく
することができる。しかも、突起物2は、被記録体側の
面をノズル面12とほぼ同一平面とし、それと反対側の
面2aを、突起物の突出端から記録ヘッド側に向け上昇
する傾斜面とすることで、図2に示すように、気流は効
果的に上方へ逃げ、インク滴に対する気流の影響を一層
小さくすることができる。この結果、噴射されたインク
の着弾位置の精度を向上できるだけでなく、そのインク
についてくる質量の小さい飛沫も着弾位置の精度を向上
できる。上記実施の形態では、記録ヘッド1が被記録体
7に沿って移動したが、記録ヘッド1が固定位置にあっ
て、被記録体7が移動しながら記録動作をするものにお
いても、突起物2により、被記録体7の移動にともない
発生する気流の影響を少なくすることができる。この場
合、記録ヘッド1の被記録体移動方向上流側にのみ、突
起物2を設ければよい。
With such a configuration, the recording head 1
When the airflow generated by the advance of the ink flows between the recording head and the recording medium 7, the airflow above the nozzle surface 12 flows outward due to the projections 2, the airflow velocity hitting the ejected ink decreases, and the recording point lands. The displacement can be made smaller than before. In addition, the projection 2 has a surface on the recording medium side substantially flush with the nozzle surface 12, and a surface 2 a on the opposite side is an inclined surface that rises from the projection end of the projection toward the recording head. As shown in FIG. 2, the airflow effectively escapes upward, and the influence of the airflow on the ink droplets can be further reduced. As a result, not only the accuracy of the landing position of the ejected ink can be improved, but also the accuracy of the landing position of a droplet having a small mass attached to the ink can be improved. In the above embodiment, the recording head 1 moves along the recording medium 7. However, even when the recording head 1 is at a fixed position and the recording operation is performed while the recording medium 7 moves, the projection 2 Thereby, the influence of the airflow generated by the movement of the recording medium 7 can be reduced. In this case, the projection 2 may be provided only on the upstream side of the recording head 1 in the recording medium moving direction.
【0014】[0014]
【発明の効果】この発明によれば、記録ヘッドと被記録
体の間に入り込む気流速度を小さくし、記録点と飛沫点
の着弾位置の精度を向上できるため、記録の品質を高く
できるインクジェット記録ヘッドを提供できる。
According to the present invention, since the airflow velocity entering between the recording head and the recording medium can be reduced, and the precision of the landing position of the recording point and the droplet point can be improved, the recording quality can be improved. Can provide head.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施の形態の斜視図FIG. 1 is a perspective view of an embodiment of the present invention.
【図2】本発明の実施の形態の側面図FIG. 2 is a side view of the embodiment of the present invention.
【図3】従来の装置の斜視図FIG. 3 is a perspective view of a conventional device.
【図4】記録点の周りの状況の説明図FIG. 4 is an explanatory diagram of a situation around a recording point.
【図5】インク滴の噴射状況を説明する側面図FIG. 5 is a side view illustrating an ink droplet ejection state.
【符号の説明】[Explanation of symbols]
1 記録ヘッド 2 突起物 12 ノズル面 DESCRIPTION OF SYMBOLS 1 Recording head 2 Projection 12 Nozzle surface

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 被記録体に対し相対移動しながらノズル
    面からインクを噴射して記録する記録ヘッドにおいて、
    移動の際に記録ヘッドの相対進行方向から生じる気流が
    前記ノズル面と被記録体の間に入り込むことをおさえる
    ように、記録ヘッドの進行方向に突出した突起物を付け
    たことを特徴とするインクジェット記録ヘッド。
    1. A recording head which performs recording by ejecting ink from a nozzle surface while moving relative to a recording medium,
    An ink jet printing apparatus comprising: a projection protruding in the traveling direction of the recording head, so as to suppress an air flow generated from the relative traveling direction of the recording head when moving, from entering between the nozzle surface and the recording medium. Recording head.
  2. 【請求項2】 請求項1において、前記突起物は、被記
    録体側の面をノズル面とほぼ同一平面とし、それと反対
    側の面を、突起物の突出端から記録ヘッド側に向け上昇
    する傾斜面としたことを特徴とするインクジェット記録
    ヘッド。
    2. The projection according to claim 1, wherein the surface on the recording medium side is substantially flush with the nozzle surface, and the surface on the opposite side is inclined upward from the protruding end of the projection toward the recording head. An ink jet recording head having a surface.
JP15697197A 1997-06-13 1997-06-13 Ink jet recording head Pending JPH111001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15697197A JPH111001A (en) 1997-06-13 1997-06-13 Ink jet recording head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15697197A JPH111001A (en) 1997-06-13 1997-06-13 Ink jet recording head

Publications (1)

Publication Number Publication Date
JPH111001A true JPH111001A (en) 1999-01-06

Family

ID=15639338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15697197A Pending JPH111001A (en) 1997-06-13 1997-06-13 Ink jet recording head

Country Status (1)

Country Link
JP (1) JPH111001A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001087618A1 (en) * 2000-05-15 2001-11-22 Hewlett-Packard Company Inkjet printing with air movement system
GB2374835A (en) * 2001-04-27 2002-10-30 Hewlett Packard Co Inkjet printer having a carriage skirt which extends beyond a print cartridge(s) to influence airflow between the cartridge(s) and a medium during printing
US6669325B2 (en) * 2002-05-08 2003-12-30 Hewlett-Packard Development Company, L.P. Apparatus and method for placing fluid droplets onto an object
US6719398B1 (en) 2000-05-15 2004-04-13 Hewlett-Packard Development Company, L.P. Inkjet printing with air movement system
US6857720B2 (en) * 2003-06-18 2005-02-22 Hewlett-Packard Development Company, L.P. Airflow assembly for fluid-ejection mechanism
US7578572B2 (en) * 2005-05-27 2009-08-25 Ricoh Company, Ltd. Image forming apparatus using inkjet process capable of maintaining an image forming quality
US20110181639A1 (en) * 2010-01-26 2011-07-28 Napoleon J Leoni Inkjet Printhead and Printing System with Boundary Layer Control
WO2015060948A1 (en) * 2013-10-23 2015-04-30 Nike Innovate C.V. Printer head with airflow management system
US9315037B2 (en) 2012-10-30 2016-04-19 Hewlett-Packard Development Company, L.P. Ink aerosol filtration

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6886905B2 (en) 2000-05-15 2005-05-03 Hewlett-Packard Development Company, L.P. Inkjet printing with air movement system
WO2001087618A1 (en) * 2000-05-15 2001-11-22 Hewlett-Packard Company Inkjet printing with air movement system
US6719398B1 (en) 2000-05-15 2004-04-13 Hewlett-Packard Development Company, L.P. Inkjet printing with air movement system
GB2374835A (en) * 2001-04-27 2002-10-30 Hewlett Packard Co Inkjet printer having a carriage skirt which extends beyond a print cartridge(s) to influence airflow between the cartridge(s) and a medium during printing
US6561620B2 (en) 2001-04-27 2003-05-13 Hewlett-Packard Development Company, L.P. Carriage skirt for inkjet printer
GB2374835B (en) * 2001-04-27 2004-10-13 Hewlett Packard Co Carriage skirt for inkjet printer
DE10201892B4 (en) * 2001-04-27 2005-12-01 Hewlett-Packard Development Co., L.P., Houston Car enclosure for an inkjet printer
US6669325B2 (en) * 2002-05-08 2003-12-30 Hewlett-Packard Development Company, L.P. Apparatus and method for placing fluid droplets onto an object
US6857720B2 (en) * 2003-06-18 2005-02-22 Hewlett-Packard Development Company, L.P. Airflow assembly for fluid-ejection mechanism
US7578572B2 (en) * 2005-05-27 2009-08-25 Ricoh Company, Ltd. Image forming apparatus using inkjet process capable of maintaining an image forming quality
US20110181639A1 (en) * 2010-01-26 2011-07-28 Napoleon J Leoni Inkjet Printhead and Printing System with Boundary Layer Control
US8596742B2 (en) * 2010-01-26 2013-12-03 Hewlett-Packard Development Company, L.P. Inkjet printhead and printing system with boundary layer control
US9315037B2 (en) 2012-10-30 2016-04-19 Hewlett-Packard Development Company, L.P. Ink aerosol filtration
WO2015060948A1 (en) * 2013-10-23 2015-04-30 Nike Innovate C.V. Printer head with airflow management system
US9193152B2 (en) 2013-10-23 2015-11-24 Nike, Inc. Printer head with airflow management system
US9545805B2 (en) 2013-10-23 2017-01-17 Nike, Inc. Printer head with airflow management system

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