WO2006062151A1 - サーマルプリントヘッド - Google Patents
サーマルプリントヘッド Download PDFInfo
- Publication number
- WO2006062151A1 WO2006062151A1 PCT/JP2005/022530 JP2005022530W WO2006062151A1 WO 2006062151 A1 WO2006062151 A1 WO 2006062151A1 JP 2005022530 W JP2005022530 W JP 2005022530W WO 2006062151 A1 WO2006062151 A1 WO 2006062151A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat generating
- print head
- scanning direction
- thermal print
- end side
- Prior art date
Links
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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/3351—Electrode layers
-
- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/335—Structure of thermal heads
- B41J2/33505—Constructional details
- B41J2/33515—Heater layers
Definitions
- the present invention relates to a thermal print head used for a thermal printer.
- the illustrated thermal print head B includes a substrate 91 and a plurality of heat generating portions 92 formed on the substrate.
- the heat generating portions 92 are arranged in a line in the main scanning direction, and are grouped into a plurality of pairs. As shown in the figure, in each pair, the lower end portions of the heat generating portion 92 are connected by an intermediate electrode 93. In each pair, the upper end portion of the left heat generating portion 92 is connected to the individual electrode 94, and the upper end portion of the right heat generating portion 92 is connected to the individual electrode 95.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-165239
- the present invention has been conceived under the circumstances described above, and an object of the present invention is to provide a thermal print head capable of fine and high-speed printing.
- the present invention takes the following technical means.
- a thermal printhead provided by the present invention includes a substrate and a substrate on the substrate.
- a plurality of heat generating portions arranged at intervals in the main scanning direction and a plurality of electrodes connected to the plurality of heat generating portions are provided.
- Each electrode has a tapered portion whose width is narrowed toward the corresponding one of the plurality of heat generating portions.
- each heat generating portion can be made minute, and the width of each electrode can be widened to reduce the resistance value.
- a low resistance value increases the amount of current supplied to the heat generating part, and shortens the time required for the heat generating part to rise to a temperature suitable for printing. As a result, fine and high-speed printing can be realized.
- the wider the electrode the lower the occurrence of problems such as disconnection of the electrode.
- the width of the electrode gradually decreases in the tapered portion, so that the current flowing direction is locally unjustly disturbed. Can be suppressed. Therefore, it is possible to avoid uneven distribution of heat generation in each of the heat generating portions, and to prevent print dots from fading or distorted.
- each of the plurality of electrodes includes a plurality of intermediate electrodes each having a U shape and a plurality of individual electrodes extending in the Z or sub-scanning direction.
- Each intermediate electrode is connected to a pair of heat generating portions among the plurality of heat generating portions.
- Each individual electrode is connected to a corresponding one of the plurality of heat generating portions.
- the plurality of heat generating portions are arranged in the main scanning direction.
- a pair of adjacent heat generating parts constitutes a unit (heat generating dot) having a heat generating function.
- Each intermediate electrode connects the two heat generating parts constituting the pair to each other.
- Each individual electrode is connected to the heat generating portion at a position opposite to the intermediate electrode, for example.
- a plurality of heat generating portions can be disposed near one end of the substrate.
- the tapered portion has a first end side and a second end side which are separated from each other in the main scanning direction.
- the first end side is parallel to the sub-scanning direction
- the second end side is inclined with respect to the sub-scanning direction.
- Such a configuration is suitable for bringing the pair of heat generating parts close to each other.
- both can generate heat and raise the temperature of each other when energized. Therefore, it is possible to shorten the time required for the pair of heat generating parts to rise to a temperature suitable for printing, and to increase the printing speed. This is advantageous when making the system easier.
- Both the first end side and the second end side of the tapered portion may be configured to be inclined with respect to the sub-scanning direction.
- the first end side and the second end side may be configured to be symmetrical with respect to each other with respect to an imaginary line extending in parallel with the sub-scanning direction.
- one heat generating portion corresponding to this virtual line force may be configured to extend in half. According to such a configuration, the distance between the pair of heat generating portions can be made relatively large. Therefore, it is possible to avoid repeated repetition of excessive heating due to the temperature of these heat generating portions being mutually increased, and it is possible to increase the speed of printing using this thermal print head. In addition, it is advantageous for improving the durability.
- FIG. 1 is a plan view showing a main part of a thermal print head according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line II-II in FIG.
- FIG. 3 is a plan view showing a main part of a thermal print head according to a second embodiment of the present invention.
- FIG. 4 is a plan view showing a main part of a thermal print head according to a third embodiment of the present invention.
- FIG. 5 is a plan view showing a main part of a thermal print head according to a fourth embodiment of the present invention.
- FIG. 6 is a plan view showing a main part of a conventional thermal print head.
- FIGS. 1 and 2 show a thermal print head according to a first embodiment of the present invention.
- This thermal print head A1 includes a substrate 1, a plurality of heating sections 2, a plurality of individual electrodes 31, 32
- a plurality of intermediate electrodes 33, a glaze layer 4, and a protective layer 5 are provided.
- the substrate 1 is a flat plate having a rectangular shape in plan view extending in the main scanning direction X, and is formed by an insulator force such as alumina ceramic.
- the plurality of heat generating portions 2 are arranged in a line in the main scanning direction X.
- the heat generating part 2 is formed of, for example, a TaSiO sputtered film or other metal film.
- the plurality of individual electrodes 31, 32 and the intermediate electrode 33 are made of a metal (eg, aluminum or gold) having a lower electrical resistance than that of the heat generating part 2, and are for supplying power to the heat generating part 2. .
- the individual electrodes 31 and 32 and the intermediate electrode 33 are separated from each other so as to sandwich the heat generating portion 2 in the sub-scanning direction Y.
- the intermediate electrode 33 is U-shaped, is located downstream of the heat generating portion 2 in the sub-scanning direction Y, and is adjacent to the main scanning direction X in two heat generation directions. Are connected.
- Each of the individual electrodes 31 and 32 has a strip shape extending in the sub-scanning direction Y, is located upstream of the plurality of heat generating units 2 in the sub-scanning direction Y, and is connected to the heat generating unit 2.
- the individual electrode 31 is electrically connected to a common wiring (not shown), and the individual electrode 32 is connected to a driving IC (not shown). This driving IC performs or stops energization of each heat generating part 2 by switching.
- the individual electrodes 31, 32 and the intermediate electrode 33 have thick portions 31A, 32A, 33A, narrow portions 31B, 32B, 33B, and teno bowls 31C, 32C, 33C, respectively. .
- the widths 31A, 3 2A, 33A are constant in width.
- the thick portions 31A and 32A occupy most of them, and the electric resistance of the individual electrodes 31 and 32 is almost determined by the width of these portions.
- the wide width portions 31A, 32A, 33A are wider than the heat generating portion 2.
- the narrow width portions 31B, 32B, and 33B are portions connected to the heat generating portion 2, and are approximately the same as the heat generating portion 2.
- the Teno bowls 31C, 32C, and 33C are sandwiched between the wide bowls 32A and 33A and the narrow bowls 31B, 32B, and 33B, and the width thereof decreases toward the heat generating portion 2.
- sides (first end sides) 31Ca, 32Ca, and 33Ca that are closer to the inside of the heat generating portion 2 that are paired with each other are parallel to the sub-scanning direction Y.
- the sides (second end sides) 31Cb, 32Cb, 33Cb that are closer to the outside of the heat generating part 2 that are paired with each other are inclined with respect to the sub-scanning direction Y.
- a glaze layer 4 is formed on the substrate 1.
- Glaze layer 4 For example, it is made of glass, and is intended to provide a smooth surface suitable for forming the resistor film 21, the individual electrodes 31, 32, the intermediate electrode 33, etc. constituting the heat generating portion 2.
- a resistor film 21 is formed on the glaze layer 4, and a portion of the resistor film 21 that is exposed without being covered by the individual electrodes 31 and 32 and the intermediate electrode 33 is a plurality of heat generating sections 2. .
- Such a heat generating portion 2 can be formed, for example, by etching using photolithography. These heat generating portions 2 are formed in a portion of the glaze layer 4 that bulges upward, and are arranged so as to be in contact with the thermal paper via the protective layer 5.
- the protective layer 5 is made of, for example, glass, and is formed so as to cover the plurality of heat generating portions 2, the individual electrodes 31, 32, and the intermediate electrode 33, and is for protecting these.
- the thermal print head A1 is configured as a so-called thin film type thermal print head.
- the wide width portions 31 A, 32 A, 33 A of the individual electrodes 31, 32 and the intermediate electrode 33 can be widened regardless of the width of the heat generating portion 2.
- the heating rate of the heat generating part 2 can be increased when the heat generating part 2 is energized.
- the wide width portions 31A, 32A, 33A are wide, it is advantageous to reduce the resistance values of the individual electrodes 31, 32 and the intermediate electrode 33, and therefore to supply a large current to the heat generating portion 2. The Therefore, it is possible to reduce the time required for the heating unit 2 to rise to a temperature suitable for printing, and to achieve both high definition and high speed printing.
- the tapered portions 31C, 32C, 33C are provided and the widths of the individual electrodes 31, 32 and the intermediate electrode 33 are gradually changed, the direction of current flow in the tapered portions 31C, 32C, 33C is changed. Local disturbance can be suppressed. For this reason, the direction of the current flowing through the heat generating portion 2 can be made uniform along the sub-scanning direction Y. Accordingly, it is possible to avoid uneven distribution of heat generation in the heat generating portion 2 and to prevent the printed dots from becoming faint or distorted.
- FIGS. 3 to 5 show other embodiments of the present invention.
- the same or similar elements as those in the first embodiment are denoted by the same reference numerals.
- FIG. 3 shows a main part of the thermal print head A2 according to the second embodiment of the present invention. Execute this row f [Ko te te raku, taeno ⁇ 31C, 32C, 33C side 31Ca, 31Cb, 32Ca, 32Cb, 33Ca, 33Cb Different from one example.
- the sides 31Ca, 32Ca, 33Ca of the Teno ridges 31C, 32C, 33C and the sides 31Cb, 32Cb, 33Cb are inclined at the same angle on the opposite sides with respect to the sub-scanning direction Y.
- the teno ⁇ 31C, 32C, 33Ci, and the narrow ⁇ 32B, 33B rules are symmetrical with respect to the center line C of each heating part 2 located at the symmetry axis.
- the heat generating portion 2 and the wide width portions 31A, 32A, 33A can be arranged on the same line. Further, the heat generating portion 2 and the wide width portions 31A, 32A, and 33A are electrically connected to each other through tapered portions 31C, 32C, and 33C that are line-symmetric. As a result, it is suitable for the current to flow uniformly along the sub-scanning direction Y to the wide width portions 31A, 32A, 33A and the narrow heat generating portion 2, and this current It is suitable for suppressing problems such as locally disturbing directions. Accordingly, it is possible to prevent the heat generation in the heat generating portion 2 from becoming uneven and further prevent the printed dots from becoming faint or distorted.
- the interval between the heat generating parts 2 paired with each other can be made relatively large. If the interval between the heat generating parts 2 is large, it is possible to prevent the two parts from generating heat when energized, thereby preventing the temperature from rising and excessively high. As described in the thermal print head A1 of the first embodiment, In this case, it is desirable to make the two heat generating parts 2 that make a pair close to each other. However, if you want to increase the durability of the thermal print head, the heat generating part 2 is not as in the case of the thermal print head A2 in the second embodiment. The durability can be improved by avoiding an excessively high temperature. Also in the second embodiment, the effect of high-speed printing is expected due to the miniaturization of each heat generating portion 2.
- FIG. 4 shows a main part of a thermal print head A3 according to the third embodiment of the present invention.
- the thermal print head A3 differs from the second embodiment in that the sides 31Ca, 31Cb and sides 32Ca, 32Cb and sides 33Ca, 33Cb of the tapered portions 31C, 32C, 33C are inclined to the same side. .
- the third embodiment it is possible to bring the heat generating parts 2 that are paired with each other closer together, which is suitable for high-speed printing.
- the individual electrodes 31 and 32 can be relatively spaced apart from each other, and problems such as inappropriate conduction of these can be avoided.
- the configuration having the electrode pattern of the folded shape at the intermediate electrode 33 like the above-described thermal print heads A1 to A3 it is possible to dispose the heat generating portion 2 near one end of the substrate 1, It is preferable to press the heat generating part 2 against a thermal paper or the like with high pressure so as to sharpen and speed up printing.
- the configuration including the common electrode 34 having a comb-teeth shape has the tapered portions 31C and 34C. As a result, it is possible to achieve high definition and high speed printing as in the above-described embodiment.
- the thermal print head according to the present invention is not limited to the above-described embodiments.
- the specific configuration of each part of the thermal print head according to the present invention can be varied in design in various ways.
- the heat generating portion is not limited to a thin film formed by a so-called thin film forming method such as sputtering, and is formed of a thick film formed by a so-called thick film forming method such as a thick film printing method. It may be. Further, the electrode may be a thin film or a thick film.
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- Electronic Switches (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/792,636 US7629990B2 (en) | 2004-12-10 | 2005-12-08 | Thermal print head |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-358649 | 2004-12-10 | ||
JP2004358649A JP4712367B2 (ja) | 2004-12-10 | 2004-12-10 | サーマルプリントヘッド |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006062151A1 true WO2006062151A1 (ja) | 2006-06-15 |
Family
ID=36577974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/022530 WO2006062151A1 (ja) | 2004-12-10 | 2005-12-08 | サーマルプリントヘッド |
Country Status (4)
Country | Link |
---|---|
US (1) | US7629990B2 (ja) |
JP (1) | JP4712367B2 (ja) |
CN (1) | CN100575097C (ja) |
WO (1) | WO2006062151A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI701156B (zh) * | 2019-05-28 | 2020-08-11 | 謙華科技股份有限公司 | 列印裝置、熱印頭結構及熱印頭結構之製造方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4859662B2 (ja) * | 2006-12-28 | 2012-01-25 | 京セラ株式会社 | サーマルヘッドおよびそれを備えたサーマルプリンタ |
JP5106089B2 (ja) * | 2007-12-26 | 2012-12-26 | 京セラ株式会社 | 記録ヘッド、及びこれを備えた記録装置 |
JP5049894B2 (ja) * | 2008-06-24 | 2012-10-17 | アルプス電気株式会社 | サーマルヘッド |
JP2011161640A (ja) * | 2010-02-04 | 2011-08-25 | Toshiba Hokuto Electronics Corp | サーマルプリントヘッドおよびサーマルプリンタ |
JP5832743B2 (ja) * | 2010-12-16 | 2015-12-16 | ローム株式会社 | サーマルプリントヘッドの製造方法 |
JP2012152902A (ja) * | 2011-01-21 | 2012-08-16 | Canon Inc | 液体吐出ヘッド用基板 |
JP6189714B2 (ja) * | 2013-10-30 | 2017-08-30 | 京セラ株式会社 | サーマルヘッドおよびこれを備えるサーマルプリンタ |
JP7001388B2 (ja) * | 2017-08-09 | 2022-01-19 | ローム株式会社 | サーマルプリントヘッドおよびサーマルプリントヘッドの製造方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02283462A (ja) * | 1988-12-23 | 1990-11-20 | Canon Inc | 記録ヘツド及び前記記録ヘツドを用いた熱記録装置 |
JPH07314755A (ja) * | 1994-05-20 | 1995-12-05 | Rohm Co Ltd | サーマルプリントヘッド |
JPH1170658A (ja) * | 1997-06-20 | 1999-03-16 | Canon Inc | 記録素子ユニット、インクジェット記録素子ユニット、インクジェットカートリッジ、及びインクジェット記録装置 |
JP2001341311A (ja) * | 2000-05-30 | 2001-12-11 | Fuji Xerox Co Ltd | インクジェット記録ヘッド及びインクジェット記録装置 |
JP2003165239A (ja) * | 2001-11-29 | 2003-06-10 | Kyocera Corp | サーマルヘッドの製造方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62117763A (ja) * | 1985-11-18 | 1987-05-29 | Victor Co Of Japan Ltd | サ−マルヘツド及びプリント方法 |
EP0371457B1 (en) | 1988-11-28 | 1995-02-15 | Canon Kabushiki Kaisha | Recording head and recording apparatus provided with the same |
JP2001105644A (ja) * | 1999-10-05 | 2001-04-17 | Toshiba Corp | サーマルヘッド及びこれを用いた感熱複写印字装置 |
US6441840B1 (en) * | 2000-06-19 | 2002-08-27 | Rohm Co., Ltd. | Thick-film thermal printhead with improved paper transfer properties |
-
2004
- 2004-12-10 JP JP2004358649A patent/JP4712367B2/ja not_active Expired - Fee Related
-
2005
- 2005-12-08 CN CN200580042275A patent/CN100575097C/zh not_active Expired - Fee Related
- 2005-12-08 US US11/792,636 patent/US7629990B2/en active Active
- 2005-12-08 WO PCT/JP2005/022530 patent/WO2006062151A1/ja not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02283462A (ja) * | 1988-12-23 | 1990-11-20 | Canon Inc | 記録ヘツド及び前記記録ヘツドを用いた熱記録装置 |
JPH07314755A (ja) * | 1994-05-20 | 1995-12-05 | Rohm Co Ltd | サーマルプリントヘッド |
JPH1170658A (ja) * | 1997-06-20 | 1999-03-16 | Canon Inc | 記録素子ユニット、インクジェット記録素子ユニット、インクジェットカートリッジ、及びインクジェット記録装置 |
JP2001341311A (ja) * | 2000-05-30 | 2001-12-11 | Fuji Xerox Co Ltd | インクジェット記録ヘッド及びインクジェット記録装置 |
JP2003165239A (ja) * | 2001-11-29 | 2003-06-10 | Kyocera Corp | サーマルヘッドの製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI701156B (zh) * | 2019-05-28 | 2020-08-11 | 謙華科技股份有限公司 | 列印裝置、熱印頭結構及熱印頭結構之製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2006159866A (ja) | 2006-06-22 |
CN100575097C (zh) | 2009-12-30 |
US7629990B2 (en) | 2009-12-08 |
US20080100686A1 (en) | 2008-05-01 |
CN101072685A (zh) | 2007-11-14 |
JP4712367B2 (ja) | 2011-06-29 |
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