CN101791904A - 柔性电路 - Google Patents
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Abstract
本发明涉及一种柔性电路,包括:由柔性材料形成的本体;形成在所述本体上的电迹线;和由所述本体确定的用于液体流过的开口。
Description
本申请为富士胶卷迪马蒂克斯股份有限公司于2007年4月26日向中国专利局提交的题为“打印头模块”的申请号为200780015481.1的中国专利申请的分案申请。
技术领域
本发明涉及一种液滴喷出装置的柔性电路,所述液滴喷出装置用于在基板上沉积液滴。
背景技术
喷墨打印机是一种液滴喷出装置。喷墨打印机一般包括对喷嘴通路的油墨供给。喷嘴通路截至于喷出油墨液滴的喷嘴口。通过用致动器挤压油墨通路中的油墨来控制油墨液滴喷出,致动器例如可以是压电偏转器、热起泡喷射产生器或静电偏转元件。一般的打印头具有与喷嘴口和相关的致动器对应的油墨通路阵列,从而可单独控制每个喷嘴口的液滴喷出。在液滴按需打印头中,在打印头和打印基板彼此相对移动时开启每个致动器,从而在图像的特定像素位置处选择性地喷出液滴。在高性能打印头中,喷嘴口一般具有50微米或更小的,例如大约35微米的直径,以100-300个喷嘴/英寸的间距分离,具有100到3000dpi或更大的分辨率,并提供大约1到70皮升或更小的液滴尺寸。液滴喷出频率为10kHz或更大。
打印精度受大量因素影响,包括由打印机中的打印头和多个打印头之间的喷嘴喷出的液滴的尺寸和速度均匀性。反过来液滴尺寸和液滴速度受诸如油墨通路的尺寸均匀性、声波干涉效果、油墨流通路中的污染物和致动器的制动均匀性这样的因素影响。
发明内容
一般地,在一个方面中,打印头包括本体;粘附到所述本体的致动器,在所述致动器与所述本体之间的包围空间形成一腔室;由所述本体确定的开口,用于释放所述腔室中的压力;和粘附到所述开口的密封体,在确保释放压力的同时密封所述腔室。
该方案可包括一个或多个下列特征。所述致动器包括压电材料,所述密封体由塑料(例如聚酰亚胺)形成。打印头包括叠层组件。所述致动器粘附到所述叠层组件,所述叠层组件包括柔性印刷电路、空腔板、下降板、声波抑制器、隔板和孔板。在所述声波抑制器中形成有开口,在所述下降板中形成有沟道。打印头包括由所述本体确定的油墨集流腔。所述密封体使用可分离的粘结剂粘附到所述开口。
在另一个方面中,柔性电路包括由柔性材料形成的本体;形成在所述本体上的电迹线;和由所述本体确定的用于液体流过的开口。
该方案可包括一个或多个下列特征。所述本体由聚酰亚胺形成,或者包括粘结在一起(例如用包括聚酰亚胺的粘结剂)的两层柔性材料(例如聚酰亚胺)。所述本体包括基层(例如聚酰亚胺材料)、形成在所述基层上的电迹线、和覆盖所述迹线的覆层(例如可印刷的聚酰亚胺)。
在另一个方面中,叠层组件包括多个叠层,包括致动器、空腔板、下降板、和孔板,每个叠层都具有开口,每个叠层中的开口都与其他叠层的开口对准,检查所述开口来确保叠层的对准和布置。
该方案可包括一个或多个下列特征。叠层组件进一步包括在致动器上的基准标记,从而当所述叠层对准时,该基准标记是可见的。所述多个叠层还包括声波抑制器、柔性电路和隔板。
在一个方面中,对准叠层的方法包括提供具有开口的多个叠层,包括致动器、空腔板、下降板、和孔板,所述叠层之一包括基准标记;使用叠层中的开口和所述叠层之一上的所述基准标记对准叠层;将叠层粘附在一起;和检查所述开口,以确定对准叠层。检查所述开口包括使用相机观察叠层中的开口,以证实所述基准标记与所述开口对准。
此外,其他的方面、特征和优点将从下面详细的描述、附图和权利要求变得显而易见。
附图说明
图1A是打印头的透视图;
图1B是打印头的分解图;
图2A是打印头的本体和叠层组件的透视图;
图2B是打印头的横截面图;
图2C是本体底侧的透视图
图3是叠层组件的分解图;
图4A是柔性印刷电路的透视图;
图4B是柔性印刷电路的横截面图。
具体实施方式
参照图1A和1B,打印头10包括粘结到叠层组件14的本体12。这些部件用诸如环氧树脂这样的粘结剂粘结在一起。油墨首先通过过滤器16和管子18引入打印头10并通过形成在本体12中的油墨倒钩(barb)20进入本体12中。在本体12中形成有开口22,用于释放本体12与组件14之间的气压;在开口22上放置有密封体24。盖子26粘附到本体12顶部。
图2A和2B显示了打印头10的本体12和组件14。组件14中的第一层是粘结到柔性印刷电路30的压电元件28。当本体12粘结到组件14时,形成了保护压电元件28免于外部环境并与油墨通路密封的腔室32。
参照图3,组件14包括粘结在一起的下列部件:压电元件28、柔性印刷电路30、空腔板34、下降板(descender plate)36、声波抑制器38、隔板40和孔板42。这些部件用诸如环氧树脂这样的粘结剂粘结在一起。
参照图2A,从油墨倒钩20向下流到本体12底侧并进入如图2C中所示的形成在本体12中的集流腔44中。油墨填满集流腔44,然后流过柔性印刷电路30中的开口46并进入如图3中所示的形成在空腔板34中的泵室48。
参照图3,当压电元件28启动时,泵室中的油墨被抽吸,通过泵室中的开口50,通过下降板36中的开口52,通过声波抑制器38中的开口(没有示出),通过隔板开口54,并从孔板42中的孔56出来。
图2B显示了当本体12粘结到组件14,在组件14中具有作为第一层的压电元件28时形成的腔室32的横截面图。腔室32保护压电元件28免于外部环境。在本体12中形成开口22以释放腔室32中的气压,密封体24用粘结剂(如环氧树脂)粘结到开口22。密封体24由在压力下改变形状的柔顺材料(如聚酰亚胺)形成。
当腔室32内的气压升高时,给其中密封体24与开口22接触的开口22的周边附近施加了压力。施加给密封体24的压力的量是开口22的半径的函数。在特定的压力时,将密封体24粘结到开口22的粘结剂从开口22表面分离,从而释放气压,随后再粘附上。对于特定的气压设计开口22的半径和粘结剂的强度,从而粘结剂在特定的气压时分离并再粘附。
图2A显示了升高到本体12表面之上的本体12中的开口22。通过升高开口22,可保护压电元件28免于泄漏的油墨,密封体24进一步保护压电元件28免于油墨或其他环境因素。
参照图3,柔性印刷电路30中的开口提供了从集流腔44到泵室的油墨流路。图4A显示了柔性印刷电路30,其具有通过开口之间的空间延伸以避免在液体流过开口46时接触液体的电迹线58。电迹线58从柔性印刷电路30中部附近(接近压电元件)的电极延伸到柔性印刷电路30端部的连接器60。凸块62在连接器60的每一侧上延伸,其扣进如图1A中所示的盖子26中。
图4B显示了具有用粘结剂粘结在一起的第一层64和第二层66的柔性印刷电路30。随着时间的流逝,油墨可能将粘结剂从该两个层分离,泄漏在柔性印刷电路30内并与电迹线58接触。在一个方案中,柔性印刷电路30的两个层由聚酰亚胺形成,粘结剂也包含聚酰亚胺。当柔性印刷电路30的层和粘结剂由相同的材料形成时,油墨不可能将粘结剂从两个层分离。可用冲模、激光或其他类似的方法在柔性印刷电路30中切出开口。可使用涂层或其他材料保护柔性印刷电路30中的开口边缘免于由于液体流过开口而造成的损害。
参照图3,尽管柔性印刷电路30中的开口提供了到泵室的油墨流路,但实际上仅有一些开口与空腔板34中的泵室对齐。其余的泵室被开口之间的空间阻挡。对于到达被阻挡的泵室的油墨,油墨通过未被阻挡的泵室流过柔性印刷电路30中的开口并进入下降板36中的沟道68。然后这些沟道68中的油墨向回流到空腔板34中,以进入未被阻挡的泵室。
本体12可由诸如聚苯硫醚(PPS)这样的塑料材料、或诸如铝这样的金属形成。盖子26可由诸如乙缩醛这样的塑料材料形成。柔性印刷电路30和声波抑制器38可由聚酰亚胺形成,而下降板36和空腔板34可由诸如金属合金这样的金属形成。隔板40可由具有低模数的材料,诸如碳(大约7MFa)或聚酰亚胺(大约3MPa)形成。孔板42可由不锈钢形成。
隔板40用于将孔板42和声波抑制器38粘结在叠层组件14内。除了直接给孔板42或声波抑制器38涂敷粘结剂之外,可在隔板的两侧上直接涂敷粘结剂,然后将孔板42和声波抑制器38粘结到隔板。隔板还可分散由于不同的热膨胀系数而导致的叠层之间的应力。例如,当叠层冷却到室温(大约22℃)时,在大约150℃的粘结温度处粘结在一起的具有不同热膨胀系数的叠层可能弯曲。隔板可通过分散粘结应力减小叠层组件的弯曲。隔板的厚度及其模数可影响其分散组件内的应力的能力。隔板的百分比应力是应力除以隔板厚度的函数。
图2C描述了具有三个孔72的本体12,在本体12的一侧上具有两个孔,在另一侧上具有一个孔,用于接收将打印头10紧固到架组件的三个离心螺钉。
参照图3,使用每个部件端部上的开口74检查缺少的部件和部件的对准。检查相机观察开口74,以在视觉上***件的对准。在压电元件28上设置有基准标记,当所有部件正确对准时能够看到该基准标记。此外,在制造之后或在打印头10的维护过程中,通过开口74的视觉检查可确保所有部件都存在且部件都处于正确的顺序。
在其他方案中,可通过诸如粘结剂、螺丝和扣环这样的其他紧固器件连接本体和叠层组件。可通过其他材料或粘结剂紧固组件的各部分。可通过其他粘结剂将密封体24粘结到本体中的开口。参照图2A和2B,除了在组件与本体之间形成腔室来保护压电元件之外,可通过涂层保护压电元件。尽管图1A显示了扣到打印头10的盖子26中的凸块62,但凸块可通过螺丝、扣环、粘结剂或其他固定装置紧固到打印头。图3中的柔性印刷电路30显示了在柔性印刷电路30两侧上的几个开口,然而柔性印刷电路30可仅具有一个用于油墨通路的开口或仅在一侧上仅具有开口。类似地,图3中的空腔板显示了在空腔板的两侧上的几个泵室,但空腔板可仅具有一个泵室或仅在一侧上具有泵室。
图1A中的连接器60可不使用凸块62直接紧固到盖子26。例如,连接器60可使用粘结剂粘合到盖子26。
参照图4A,柔性印刷电路30上的电迹线58被密封,从而防止流过开口46的液体接触迹线。例如,图4B中的第一层64可以是聚酰亚胺材料(例如聚酰亚胺),电迹线形成在第一层64上,第二层66是覆盖电迹线的覆层。该覆层可以是诸如从Nippon Steel Chemical,Japan获得的SPI丝网印刷聚酰亚胺覆层这样的可印刷的聚酰亚胺。使用丝网印刷方法或其他沉积方法沉积聚酰亚胺。
参照图1A,打印头10的尺寸包括大约29.15mm的高度,大约115.9mm的长度和大约30.6mm的宽度。参照图3,叠层组件14还可包括包含凸块43的接地板41。当叠层叠加在一起时,如图2A中所示,凸块43从组件14延伸并在框架12上折叠。图1中的地线13与接地板41的凸块43连接。
参照图3,叠层组件14还可包括包含凸块43的接地板41。当叠层叠加在一起时,如图2A中所示,凸块43从组件14延伸并在框架12上折叠。图1中的地线13与接地板41的凸块43连接。
再参照图3,流过叠层组件14的液体穿过接地板41中的开口54并从孔板42中的孔56流出。接地板41还可具有与组件14中其他叠层的开口74对准的开口74。
其他方案在随后权利要求的范围内。
Claims (8)
1.一种柔性电路,包括:
由柔性材料形成的本体;
形成在所述本体上的电迹线;和
由所述本体确定的用于液体流过的开口。
2.根据权利要求1所述的柔性电路,其中,所述本体由聚酰亚胺形成。
3.根据权利要求1所述的柔性电路,其中,所述本体包括粘结在一起的两层柔性材料。
4.根据权利要求1所述的柔性电路,其中,所述两层由聚酰亚胺形成。
5.根据权利要求4所述的柔性电路,其中,所述两层使用粘结剂粘结在一起。
6.根据权利要求5所述的柔性电路,其中,所述粘结剂包括聚酰亚胺。
7.根据权利要求1所述的柔性电路,其中,所述本体包括覆盖所述迹线的覆层。
8.根据权利要求7所述的柔性电路,其中,所述覆层包括沉积在基层上并覆盖所述迹线的可印刷的聚酰亚胺。
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JP4966829B2 (ja) | 2007-11-16 | 2012-07-04 | 株式会社リコー | 液体吐出ヘッド、インクカートリッジ及び画像形成装置 |
JP5427730B2 (ja) * | 2010-08-19 | 2014-02-26 | 東芝テック株式会社 | インクジェットプリントヘッド及びインクジェットプリントヘッド製造方法 |
US9908327B2 (en) * | 2014-04-23 | 2018-03-06 | Hewlett-Packard Development Company, L.P. | Printhead assembly |
JP6451174B2 (ja) * | 2014-09-24 | 2019-01-16 | セイコーエプソン株式会社 | 液体吐出装置及び液体吐出方法 |
EP3976136A1 (en) | 2019-05-30 | 2022-04-06 | Becton, Dickinson and Company | Cartridge adapter for drug delivery device |
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HK1147229A1 (en) | 2011-08-05 |
CN101432142A (zh) | 2009-05-13 |
JP5173010B2 (ja) | 2013-03-27 |
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KR101422210B1 (ko) | 2014-07-30 |
CN101797839B (zh) | 2012-10-31 |
EP2013023B1 (en) | 2012-05-30 |
US8403460B2 (en) | 2013-03-26 |
WO2007127846A2 (en) | 2007-11-08 |
JP2009535239A (ja) | 2009-10-01 |
US8608287B2 (en) | 2013-12-17 |
CN101432142B (zh) | 2013-01-02 |
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EP2013023A4 (en) | 2010-01-27 |
CN101797839A (zh) | 2010-08-11 |
EP2013023A2 (en) | 2009-01-14 |
JP5175970B2 (ja) | 2013-04-03 |
US20070252874A1 (en) | 2007-11-01 |
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HK1126169A1 (en) | 2009-08-28 |
WO2007127846A3 (en) | 2008-04-03 |
US20130155153A1 (en) | 2013-06-20 |
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