JPH0727158Y2

JPH0727158Y2 - Printer

Info

Publication number: JPH0727158Y2
Application number: JP1989000223U
Authority: JP
Inventors: 聖也佐藤
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 1989-01-05
Filing date: 1989-01-05
Publication date: 1995-06-21
Anticipated expiration: 2004-01-05
Also published as: JPH0294129U

Description

【考案の詳細な説明】［産業上の利用分野］本考案は活字群の裏面から活字を突出させて印字を行な
う形式のプリンタに関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a printer of a type in which printing is performed by projecting characters from the back surface of a character group.

［従来の技術］従来この種のプリンタの活字群は、特開昭61-164865の
第２図に示されるように活字及び裏面の突起の高さは一
定であった。[Prior Art] Conventionally, in the character group of this type of printer, the heights of the character and the protrusions on the back surface are constant as shown in FIG. 2 of JP-A-61-164865.

［考案が解決しようとする課題及び目的］弾性材の活字を使って印字を行なうプリンタでは、活字
の押圧力を一定にして印字を行なうものが一般的であ
る。押圧力を一定にして印字を行なう場合、第４図に示
す様に、押圧力と活字圧縮量は比例関係にあるが、活字
面積の小さい“."や“−”等の活字と活字面積の大きい
“0"や“8"等の活字では押圧力に対する活字圧縮量の増
加する割合は一定ではない。つまり、一定の押圧力では
活字面積の小さい活字の方が多く圧縮される。一方、活
字圧縮量と印字濃度及び文字幅の関係は第５図に示され
るような比例関係がある。[Problems and Objectives to be Solved by the Invention] In a printer that performs printing by using the characters of an elastic material, it is common to perform the printing with a constant pressing force of the characters. When printing is performed with a constant pressing force, as shown in Fig. 4, the pressing force and the compression amount of the printing characters are in a proportional relationship, but the printing area and the printing area such as "." In large type such as "0" or "8", the increasing rate of the type compression amount to the pressing force is not constant. That is, with a constant pressing force, the typeface having a smaller typeface area is compressed more. On the other hand, there is a proportional relationship between the type compression amount, the print density and the character width as shown in FIG.

したがって、前記の従来技術では、活字及び裏面の突起
高さが一定であった為、第６図に示すように、活字面積
の小さい活字はつぶれ量が大きくなり印字された文字の
太さ及び濃淡が印字面積によって異なるという問題点を
有していた。そこで、本考案ではこのような問題点を解
決するもので、その目的とするところは印字品質の高い
プリンタを提供するところにある。Therefore, in the above-mentioned prior art, since the protrusion heights of the printed characters and the back surface are constant, as shown in FIG. 6, the printed characters with a small printed area have a large amount of crushing and the thickness and shade of the printed characters. Has a problem that it varies depending on the printing area. Therefore, the present invention solves such a problem, and an object of the present invention is to provide a printer having high printing quality.

［課題を解決するための手段］そこで上記課題を解決するため本考案のプリンタは、印
字する活字表面積が小さい場合、活字の高さと突起の高
さを合わせた総高さを小さく設定したことを特徴とす
る。[Means for Solving the Problems] Therefore, in order to solve the above problems, in the printer of the present invention, when the surface area of a printed character is small, the total height of the height of the character and the height of the protrusion is set to be small. Characterize.

［作用］印字する活字の面積が小さい場合は、活字と突起の高さ
の合計をより小さく設定したので、ハンマが移動しても
その総高さが低い分だけハンマと係合しなく、総高さに
対する変形量は活字表面積の大きい活字に比し少なくな
り、活字部を圧縮する押圧荷重は小さくなる。[Function] When the area of printed characters is small, the total height of the characters and protrusions was set to a smaller value. Therefore, even if the hammer moves, only a small total height will not engage the hammer and The amount of deformation with respect to the height is smaller than that of a typeface having a large typeface surface area, and the pressing load for compressing the typeface portion is small.

［実施例］本考案の実施例を第１図、第２図、第３図、第４図、第
５図を用いて説明する。第１図、第２図、第３図は本考
案による実施例の側断面図である。第１図は待機状態を
示し、第２図、第３図は印字状態を示す。１は基台であ
り、この基台１の外周には、表面に活字202を、裏面に
は突起201を有した活字輪２が保持されている。３はハ
ンマ、４はプラテン、５は印字紙である。[Embodiment] An embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 1, 2 and 3 are side sectional views of an embodiment according to the present invention. FIG. 1 shows the standby state, and FIGS. 2 and 3 show the printing state. Reference numeral 1 denotes a base. On the outer periphery of the base 1, a type 202 is held on the front side and a type wheel 2 having a protrusion 201 is held on the back side. 3 is a hammer, 4 is a platen, and 5 is printing paper.

次に動作を説明する。基台１と活字輪２はＡ方向に回転
しており、所望の活字202が印字位置に来たとき回転が
止められ停止する。ハンマ３がＢ方向に移動し、突起20
1を押すことにより活字202を押し出し、印字紙５を介し
てプラテン４に押圧する。これによりあらかじめ活字20
2の表面に塗られていたインクが印字紙に転写され文字
が印刷される。第１図に示すように活字面積が小さ
い“."や“−”の活字の高さはH₁活字面積が大きい“0"
や“8"等の活字の突起高さH₂より低くなっている。これ
により、活字面積が小さい活字の活字圧縮量は第４図点
線のグラフのように活字面積が大きいものとほぼ同じと
なる。したがって、印字濃度及び文字幅が第６図から分
かるように同じになるとともに、印字状態に於ける活字
のつぶれ状態も第２図及び第３図から分かるように活字
面積にかかわらず同様になる。Next, the operation will be described. The base 1 and the type wheel 2 are rotating in the direction A, and when the desired type 202 comes to the printing position, the rotation is stopped and stopped. The hammer 3 moves in the B direction, and the protrusion 20
The type 202 is pushed out by pressing 1, and is pressed against the platen 4 via the printing paper 5. This makes it possible to print 20
The ink applied to the surface of 2 is transferred to the printing paper and characters are printed. As shown in Fig. _1, the height of the type "." Or "-" with a small type area is H1 with a large type area "0".
It is lower than the projection height H ₂ of type such as or "8". As a result, the type compression amount of the typeface having a small typeface area becomes almost the same as that of the typeface having a large typeface area as shown by the dotted line in FIG. Therefore, the print density and the character width are the same as can be seen from FIG. 6, and the crushed state of the printed characters in the printed state is the same regardless of the printed area as can be seen from FIGS. 2 and 3.

以上、本考案の実施例を、突起の高さを活字面積により
変えた場合について説明してきたが、活字の高さを変え
た場合についても同等の効果が得られる。The embodiment of the present invention has been described above with respect to the case where the height of the protrusion is changed depending on the type area. However, the same effect can be obtained when the height of the type is changed.

［考案の効果］以上述べたように本考案によれば、活字は、印字する活
字表面積が小さい場合、活字の高さと突起の高さを合わ
せた総高さを小さく設定したので、ハンマが移動しても
その総高さが低い分だけハンマと係合しなく、総高さに
対する変形量は活字表面積の大きい活字に比し少なくな
り、活字部を圧縮する押圧荷重は小さくなる。そのた
め、印字面の活字にかかる圧力に差がなくなり、活字圧
縮量はほぼ同量となることにより印字された文字の太さ
及び濃淡が印字面積に差があったとしても、ほぼ一定と
なり、ぼやけることがなく、鮮明な印字品質が得られる
品質向上に大きく貢献するものであり、その実用的効果
は極めて大きいものである。[Advantage of Device] As described above, according to the present invention, when the type surface area to be printed is small, the total height of the type and the height of the protrusion is set to be small, so that the hammer moves. However, since the total height is low, the hammer does not engage with the hammer, and the amount of deformation with respect to the total height is smaller than that of a character having a large surface area of the character, and the pressing load for compressing the character is small. Therefore, there is no difference in the pressure applied to the printed characters on the printing surface, and the compression amount of the printed characters is almost the same amount, so even if the thickness and shade of the printed characters are different in the printing area, they become almost constant and blurred. This is a great contribution to the quality improvement in that clear printing quality can be obtained, and its practical effect is extremely large.

[Brief description of drawings]

第１図、第２図、第３図は本考案の一実施例を示す側断
面図。第４図は、本考案のハンマの移動距離と活字圧縮量の関
係を示す図である。第５図は、活字圧縮量と印字濃度及び文字幅の一般的関
係を示す図である。第６図は、従来例の側断面図である。１……基台２……活字輪３……ハンマ４……プラテン５……印字紙1, 2, and 3 are side sectional views showing an embodiment of the present invention. FIG. 4 is a diagram showing the relationship between the moving distance of the hammer of the present invention and the type compression amount. FIG. 5 is a diagram showing a general relationship between the type compression amount, the print density, and the character width. FIG. 6 is a side sectional view of a conventional example. 1 ... base 2 ... type wheel 3 ... hammer 4 ... platen 5 ... printing paper

Claims

[Scope of utility model registration request]

1. A printer for performing printing by causing a hammer mechanism to project a print character group of print characters having a print character on the front surface and a projection corresponding to the print character on the back surface and made of an elastic material. When the surface area of the printed characters is small, the total height of the height of the printed characters and the height of the protrusions is set to be small.