WO2011000285A1 - 一种成像设备上的定影装置 - Google Patents

一种成像设备上的定影装置 Download PDF

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Publication number
WO2011000285A1
WO2011000285A1 PCT/CN2010/074506 CN2010074506W WO2011000285A1 WO 2011000285 A1 WO2011000285 A1 WO 2011000285A1 CN 2010074506 W CN2010074506 W CN 2010074506W WO 2011000285 A1 WO2011000285 A1 WO 2011000285A1
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WO
WIPO (PCT)
Prior art keywords
pressure roller
roller
pressure
heating roller
heating
Prior art date
Application number
PCT/CN2010/074506
Other languages
English (en)
French (fr)
Inventor
曾阳云
吴连俊
Original Assignee
珠海赛纳科技有限公司
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 珠海赛纳科技有限公司 filed Critical 珠海赛纳科技有限公司
Publication of WO2011000285A1 publication Critical patent/WO2011000285A1/zh

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2032—Retractable heating or pressure unit

Definitions

  • the present invention relates to a fixing device on an image forming apparatus.
  • An image fixing device of an electrophotographic image forming apparatus such as a printer, a copying machine, and a facsimile machine includes a book
  • the recording medium having the unfixed toner image thereon is passed between the heating roller and the pressure roller, and the image is fixed on the recording medium by heat and pressure.
  • a conventional fixing device 70 is shown which elastically supports a bracket on the shaft of the pressure roller 160 by a spring 190 such that the pressure roller 160 and the heat roller 170 are in pressure contact.
  • the present invention provides a fixing device on an image forming apparatus to solve the technical problem that the fixing device on the conventional image forming apparatus is difficult to release the jammed sheet after a jam occurs.
  • a fixing device on an image forming apparatus comprising: a holder for positioning a supporting pressure roller and a heating roller, a heating roller having a heating source, a pressure roller, and a forcing pressure roller
  • An elastic member in contact with the pressure of the heating roller, the two ends of the pressure roller are connected to the bracket through a pressure roller sleeve, and the pressure roller sleeve is arranged to make the pressure roller and the heating roller parallel a guide groove that is close to or away from, and is characterized in that it further comprises a separating element, one end of which is connected to the movable mechanism of the image forming apparatus, and the other end is connected to the heating roller and the pressure roller, and the movable mechanism is pulled out through the separating element
  • the pressure roller applies a force that separates the pressure roller from the heat roller.
  • the separating element comprises a sliding block, a positioning pin and a connecting rod, wherein one end of the connecting rod is connected with the movable mechanism, and the other end is movably connected to the sliding block through a positioning pin, and the two ends of the heating roller are connected with the bracket through the heating roller sleeve
  • the pressure roller bushing and the heating roller bushing are provided with a sliding groove matched with the sliding block, and the sliding block is disposed between the pressure roller bushing and the heating roller bushing and is sleeved with the pressure roller bushing
  • the chute abuts the chute on the heating roller bushing, and the width of one end of the slider against the positioning pin is smaller than the width of the other end.
  • the separating element since the separating element is added, one end of the separating element is connected with the movable mechanism of the image forming apparatus, the other end is connected with the pressure roller, and when the movable mechanism is pulled out, the pressure roller and the heating roller are applied to the pressure roller through the separating element.
  • the force of separation counteracts the force of some or all of the elastic elements forcing the pressure roller to contact the pressure of the heating roller, thereby moving the pressure roller away from the heating roller, and finally reducing or even eliminating the pressure on the jammed paper and easily releasing it.
  • the technical problem that the fixing device on the existing image forming apparatus is difficult to release the jammed paper after the jam occurs is solved.
  • Figure 1 is a cross-sectional view of a conventional fixing device
  • FIG. 2 is a schematic view of an electronic imaging device
  • Figure 3 is a schematic view of the structure of the present invention.
  • Figure 4 is an end view of the present invention.
  • Figure 5 is a schematic view of a slider of the present invention.
  • Figure 6 is a schematic view of a pressure roller bushing of the present invention
  • Figure 7 is a schematic view of a heating roller bushing of the present invention.
  • FIG. 2 shows a schematic view of the image forming apparatus 1.
  • the photosensitive drum 13 is rotated in a predetermined direction.
  • the outer surface of the photosensitive drum 13 is charged with a predetermined polarity voltage by the charging roller 14.
  • the photosensitive drum 13 is rotated, its charged outer surface is irradiated with the laser unit 15, and an electrostatic latent image is formed on the exposed outer surface.
  • the electrostatic latent image formed on the photosensitive drum 13 is developed into a visible image by the developing roller 13 by means of toner Toner image.
  • a recording medium P (i.e., paper, transparencies, etc.) loaded in the paper feed cassette 3 is fed to the photosensitive drum 13 along the paper path by the driving of the paper feed roller 4.
  • the recording medium P passes between the photosensitive drum 13 and the transfer roller 6, the toner image on the photosensitive drum 13 is transferred onto the recording medium P.
  • the recording medium P having the toner that has been transferred is then passed between the heating roller and the pressure roller of the image fixing device, whereby the toner image is fixed on the recording medium P. After passing through the image fixing device 7, the recording medium P is discharged onto the discharge tray 9 by the discharge roller 8.
  • the fixing device 7 of the present invention comprises: a bracket 18, a pressure roller 16, a heating roller 17, an elastic supporting member 19, and a separating member.
  • the bracket 18 is used for positioning and supporting the pressure roller 16 and the heating roller 17, and has a protrusion 31 for positioning one end of the elastic member 19, and a sleeve 24 at each end of the pressure roller 16 and the heating roller 17 25, the sleeve has guide grooves and chutes, wherein the guide grooves 26, 29 cooperate with the bracket 18 for limiting the pressure roller 16 and the heating roller 17, and the sleeve 24 of the pressure roller 16 further has a protrusion 28 for positioning
  • the other end of the elastic member 19 is mounted such that the elastic member 19 brings the pressure roller 16 and the heat roller 17 into pressure contact.
  • the separating element comprises a slider 20, a positioning pin 21 and a connecting rod 23, and the sliding block 20 is between the sliding grooves 27, 30 of the two bushings 24, 25, and the sliding block 20 is movably connected with the connecting rod 23 by the positioning pin 21, wherein the sliding member
  • the width of the block 20 toward the one end A of the positioning pin 21 is smaller than the width of the other end B, and the hole 23 on the link 22 is connected to a movable mechanism (not shown) on the image forming apparatus 1, and the movable mechanism may be imaged.
  • the movable mechanism When a paper jam occurs, the movable mechanism is pulled, and the movable mechanism drives the link 22 so that the slider 20 slides toward the end A having a small width, so that the slider 20 presses the sleeves 24 and 25 of the pressure roller 16 and the heating roller 17, thereby canceling Some or all of the elastic members 19 force the pressure roller to contact the pressure of the heating roller, so that the pressure roller 16 moves toward the heating roller 17, and finally the pressure on the jammed paper is reduced or even eliminated, and is easily released; After the paper, the movable mechanism is released, and under the elastic pressing force of the elastic member 19, the slider 20 slides toward the wide end B, so that the pressure roller 16 and the heating roller 17 are in close contact with each other, so that the pressure roller 16 and the heating roller 17 are returned. To work.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Description

一种成像设备上的定影装置
技术领域
本发明涉及成像设备上的定影装置。
背景技术 说 诸如打印机、复印机和传真机的电子照相成像设备的图像定影装置包括具有 书
加热源的加热辊，以及临近加热辊的压力辊，所述压力辊以预定压力接触加热辊， 即构成图像定影装置。使得其上具有未定影的调色剂图像的记录介质通过加热辊 和压力辊之间， 进而利用热量和压力将图像定影在记录介质上。 在图 1中，示出一种常见的定影装置 70，通过弹簧 190弹性支持压力辊 160 轴上的支架，使得压力辊 160和加热辊 170压力接触。 当含有此种定影装置的成 像设备发生卡纸时， 成像设备终止当前操作。此时必须先移除所卡的纸张， 成像 设备才以继续开始工作。 为了排除定影装置 70发生的卡纸， 通常是在走纸通道 上设置一个可以开闭的机盖。然而， 由于压力辊 160和加热辊 170之间的压力很 大， 大约为 30〜50kg， 所以卡在压力辊和加热辊之间的纸张很难解除。 当用力 拉出纸张时， 纸张上未定影的碳粉就会沾在热辊 170上， 沾污定影辊 170且会刮 伤定影辊 170， 尤其是当纸卷到辊上， 纸张将无法抽出。 这样， 就不容易得到良 好的定影且影响定影装置 70的寿命。 发明内容
本发明提供一种一种成像设备上的定影装置，以解决现有成像设备上的定影 装置在发生卡纸后很难解除被卡纸张的技术问题。
为了解决以上技术问题， 本发明采取的技术方案是： 一种成像设备上的定影装置， 包括： 用于定位支撑压力辊和加热辊的支架、 具有加热源的加热辊、压力辊和迫使压力辊与加热辊压力接触的弹性元件， 压力 辊两端通过压力辊轴套与支架连接，压力辊轴套上设置有使压力辊和加热辊平行 靠近或远离的导槽， 其特征是， 还包括分离元件， 所述分离元件一端与成像设备 的活动机构连接， 另一端与加热辊和压力辊连接， 所述活动机构拉出时通过分离 元件向压力辊施加使压力辊与加热辊分离的作用力。 所述的分离元件包括滑块、 定位销和连杆， 所述连杆一端与活动机构连接， 另一端通过定位销与滑块活动连接， 所述加热辊两端通过加热辊轴套与支架连 接，所述压力辊轴套和加热辊轴套上设置有与所述滑块相匹配的滑槽， 所述滑块 设置于压力辊轴套和加热辊轴套之间并与压力辊轴套上的滑槽和加热辊轴套上 的滑槽抵接， 所述滑块靠向定位销的一端的宽度小于另一端的宽度。 在采用了上述技术方案后， 由于增加了分离元件， 分离元件一端与成像设备 的活动机构连接， 另一端与压力辊连接， 活动机构拉出时通过分离元件向压力辊 施加使压力辊与加热辊分离的作用力，抵消一部分或全部的弹性元件迫使压力辊 与加热辊压力接触的作用力，从而使压力辊背向加热辊运动， 最终使被卡纸张所 受的压力减小甚至消除而容易解除，解决了现有成像设备上的定影装置在发生卡 纸后很难解除被卡纸张的技术问题。
附图说明
图 1是一个现有定影装置的剖视图；
图 2是电子成像设备的示意图；
图 3是本发明的结构示意图；
图 4是本发明的端面图；
图 5是本发明中滑块的示意图；
图 6是本发明中压力辊轴套的示意图； 图 7是本发明中加热辊轴套的示意图。 具体实施方式
图 2示出了成像设备 1的示意图。 参照图 2, 感光鼓 13以预定方向进行旋 转。 在旋转过程中， 感光鼓 13外表面被充电辊 14充以预定极性电压。 感光鼓 13转动时其带电的外表面受到激光单元 15的照射， 于是在曝光的外表面上形成 静电潜像。形成在感光鼓 13上的静电潜像借助调色剂被显影辊 13显影成可视的 调色剂图像。
装载在送纸盒 3中的一张记录介质 P (即纸、 透明胶片等）通过供纸辊 4的 驱动而沿走纸通道向感光鼓 13供给。 当记录介质 P通过感光鼓 13和转印辊 6 之间时， 感光鼓 13上的调色剂图像被转印到记录介质 P上。 具有已经转印有调 色剂的记录介质 P随后通过图像定影装置 Ί的加热辊和压力辊之间，由此调色剂 图像被定影在记录介质 P上。在通过图像定影装置 7后， 通过排纸辊 8将记录介 质 P排出到排纸盘 9上。 参见图 3、 图 4、 图 5、 图 6和图 7， 本发明的定影装置 7包括： 支架 18、 压力辊 16、 加热辊 17、 弹性支撑元件 19和分离元件。 支架 18用于定位支撑压 力辊 16和加热辊 17， 其上有一突起 31， 用于定位安装弹性元件 19的一端， 压 力辊 16和加热辊 17的轴上的两端各有一个轴套 24、 25， 轴套上均有导槽和滑 槽， 其中导槽 26、 29与支架 18配合用于限制压力辊 16和加热辊 17， 压力辊 16 的轴套 24上还有一个突起 28用于定位安装弹性元件 19的另一端， 这样， 弹性 元件 19使得压力辊 16和加热辊 17压力接触。分离元件包括滑块 20、定位销 21 和连杆 23， 滑块 20处于两轴套 24、 25的滑槽 27、 30之间， 滑块 20与连杆 23 靠定位销 21活动连接， 其中滑块 20靠向定位销 21的一端 A的宽度要小于另一 端 B的宽度，连杆 22上的孔 23与成像设备 1上的活动机构（图上未示出）连接， 此活动机构可以是成像设备上的盖子或其它连接装置。 当出现卡纸时， 拉动活动机构， 活动机构带动连杆 22， 使得滑块 20向宽度 小的一端 A滑动， 这样滑块 20挤压压力辊 16和加热辊 17的轴套 24、 25， 抵消 一部分或全部的弹性元件 19迫使压力辊与加热辊压力接触的作用力， 从而使压 力辊 16背向加热辊 17运动，最终使被卡纸张所受的压力减小甚至消除而容易解 除； 解除卡纸后， 释放活动机构， 在弹性元件 19 的弹性迫推作用下， 滑块 20 向宽度大的一端 B滑动，使得压力辊 16和加热辊 17压力紧密接触， 这样压力辊 16和加热辊 17回到工作状态。

Claims

权利要求书 、 一种成像设备上的定影装置， 包括： 具有加热源的加热辊、 压力辊， 用 于定位支撑压力辊和加热辊的支架和迫使压力辊与加热辊压力接触的弹 性元件， 压力辊两端通过压力辊轴套与支架连接， 压力辊轴套上设置有 使压力辊和加热辊平行靠近或远离的导槽， 其特征是， 还包括分离元件， 所述分离元件一端与成像设备的活动机构连接， 另一端与压力辊连接， 所述活动机构拉动时通过分离元件向压力辊施加使压力辊与加热辊分离 的作用力。 、 如权利要求 1所述的定影装置， 其特征是： 所述的分离元件包括滑块、 定位销和连杆， 所述连杆一端与成像设备的活动机构连接， 另一端通过 定位销与滑块活动连接， 所述加热辊两端通过加热辊轴套与支架连接， 所述压力辊轴套和加热辊轴套上设置有与所述滑块相匹配的滑槽， 所述 滑块设置于压力辊轴套和加热辊轴套之间并与压力辊轴套上的滑槽和加 热辊轴套上的滑槽抵接， 所述滑块靠向定位销的一端的宽度小于另一端 的宽度。
PCT/CN2010/074506 2009-07-02 2010-06-25 一种成像设备上的定影装置 WO2011000285A1 (zh)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201477369U (zh) * 2009-07-02 2010-05-19 珠海纳思达企业管理有限公司 一种成像设备上的定影装置
US10120317B2 (en) * 2016-10-11 2018-11-06 Canon Kabushiki Kaisha Image forming apparatus
JP6658566B2 (ja) * 2017-01-24 2020-03-04 京セラドキュメントソリューションズ株式会社 画像形成装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH06308851A (ja) * 1993-04-19 1994-11-04 Canon Inc 定着装置
CN1811616A (zh) * 2005-01-25 2006-08-02 京瓷美达株式会社 图像形成设备
JP2008151922A (ja) * 2006-12-15 2008-07-03 Canon Inc 定着装置及び画像形成装置
CN201477369U (zh) * 2009-07-02 2010-05-19 珠海纳思达企业管理有限公司 一种成像设备上的定影装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06308851A (ja) * 1993-04-19 1994-11-04 Canon Inc 定着装置
CN1811616A (zh) * 2005-01-25 2006-08-02 京瓷美达株式会社 图像形成设备
JP2008151922A (ja) * 2006-12-15 2008-07-03 Canon Inc 定着装置及び画像形成装置
CN201477369U (zh) * 2009-07-02 2010-05-19 珠海纳思达企业管理有限公司 一种成像设备上的定影装置

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