1298294 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種列印裝置之間隙調整結構，且特 別是有關於一種光電成像的列印裝置之顯影間隙調整結 構0 【先前技術】 光電成像式列印裝置乃是藉由光電成像 (electrophotography; EPG)方式進行影像之列印。光電成像 具有數個步驟，至少包含佈電（charging)、曝光（exposure)、 顯影（developing)、轉像（transferring)、以及定像（fusing) 〇 當列印裝置進行影像之列印時，首先利用佈電裝置 (charger)於一感光元件（photoconductor)表面佈滿均勻電 荷，此即為佈電步驟。接著進行曝光步驟，將待列印之影 像藉由發光二極體（Light-Emitting Diode ; LED)或雷射 (laser)轉換成光訊號，照射於帶有均勻電荷之感光元件上， 而產生一相對應之靜電潛像（latent image)。 當於感光元件上形成列印所需之潛像後，即進行_% 步驟。顯影裝置上之碳粉藉由靜電力附著於感光元件上< 潛像區，而使得靜電潛像顯影。 當完成顯影步驟後，便可將感光元件上吸附之碳粉， 利用領域習知之方法轉移至列印紙張或其他基質媒介上， 此即為轉像步驟。最後，利用一高溫滾輪（hot roller)與〜壤 力滾輪（pressure roller)，對於紙張上之碳粉進行固定，印完 成定像之步驟。 6 1298294 由於非接觸式的顯影裝置，其碳粉可利用靜電力跳躍 (jump)顯影滾軸與感光元件間之顯影間隙，而使得碳粉附著 於感光το件上之潛像區域。因此顯影間隙的控制將影響影 像的品質。 習知技術中的感光元件可為一有機感光帶（〇rganic photoconductive belt ·，〇PC belt)，且感光帶係套接於一支 撐結構上。由於，感光帶之支撐結構係利用螺絲作為鎖固 元件，因此，支撐結構會受到螺絲鎖固時的應力影響，而 產生形隻，使得感光帶在轉動時表面會波動起伏。而顯影 裝置中之顯影滾軸（devei〇ping r〇ller)於組裝後，無法避免 的會與顯影滾軸的支撐結構產生些許的誤差（step)，影響顯 影滾軸與感光元件間顯影間隙的精準度。 上述的兩種情形均會使得感光帶與顯影滾軸的顯影間 隙不一致，而使得碳粉無法均勻的吸附於感光元件上，因 而影響成像的品質。 【發明内容】 因此本發明的目的就是在提供一種列印裝置之間隙調 整結構，用以維持感光元件與顯影滾軸間之顯影間隙，進 而提高碳粉成像的品質。 ▲本發明的另_目的是在提供一種顯影裝置之滾軸間隙 凋整裝置，以補償顯影滾軸與顯影間隙間的差值，進而提 高滾軸支撐架接觸感光裝置以定位顯影滾軸與感光裝置間 顯影間隙的精密度。 根據本發明之上述目的，提出一種列印裝置之間隙調 1298294 整結構，以維持一感光裝置與—顯影裝置H㈣ 隙。列印裝置之間隙調整結構包含一感光裝置框架、一感 光元件《及至少一感光元件支撐件。感光裝置框架具有 :軸向，感光元件支撐件之兩端係固定於軸向相對兩端之 感光裝置框架上，且每一個感光元件支撐件具有與轴向平 打之一條狀突起。感光元件係套裝於感光裝置框架及感光 元件支撐件上。其中，顯影裝置具有至少一碳粉g，配置 於對應條狀突起，以藉由條狀突起支撑感光元件，進而維 持感光元件與碳粉匣間之顯影間隙。每一個條狀突起具有 一圓弧表面，此圓弧表面之半徑約為5〇〜3〇〇毫米。列印裝 置之間隙調整結構更包含複數個定位托架，配置於軸向相 對兩端之感光裝置框架上，以定位感光元件支撐件。列印 裝置之間隙調整結構更包含複數個螺絲，以藉由螺絲將定 位=架固定於感光裝置框架上。定位托架具有定位之複數 個突起，每一個感光元件支推件之兩端各具有一凹槽對應 於此突起，以藉由凹槽與突起之耦合，進而將感光元件支 撐件定位於定位托架上。其中每—個定位托架具有一傾斜 角度’使定位於定位托架之感光元件切件，可對應碳粉 匿進行-角度調整。列印裝置之間隙調整結構更包含複數 個挾持件，配置於軸向之相對兩端’以浮動式地固定定位 托架及感光元件支撐件於感光裝置框架。每—個挟持件且 有複數個定位孔，配置於對應定位托架之突起，其中此定 位孔係與突起卡合’以限定感光元件支撐件於平㈣向之 位移。感光元件支撐件之材料可為一合金、金屬或塑膠， 且較佳地是經過一陽極處理之紹合金。每一個碳粉g可更 1298294 包含一滾軸間隙調整褒置，每一個滾軸間隙調整裝置包含 一顯影滾軸與一滾轴支撐架。顯影滾軸係平行配置於對應 每一個感光元件支撐件，以送出碳粉匣内之碳粉，使碳粉 吸附於感光元件上。滾軸支撐架係用以固定顯影滾軸，其 中滾軸支撐架之兩端各具有一定位凸緣，以與感光元件I 撐件接觸，進而固定顯影滾軸之位置。定位凸緣較佳地係 為圓弧凸緣，且滾軸支撐架兩端之圓弧凸緣與顯影滾軸 車乂佺地係為一共軸配置，且圓弧凸緣之半徑略大於顯影滾 軸之半徑，且兩者間之差值不大於顯影間隙。滾軸間隙調 整裝置可更包含至少一薄片，貼附於滾軸支撐架兩端之圓 弧凸緣上，用於補償顯影滾軸與感光元、^ 值。此差值之範圍依製造之精密度而控制在一小==差 如15μιη至65μιη之間，薄片之厚度可選自於由2叫㈤、 25μηι、30μιη、35μιη、4〇隅、45μιη、5〇_、55隅，及卿㈤ 所組成之群組或其他不同尺寸之群組。薄狀材料可為一 聚_脂加詞或為一金屬。其中每一個薄片非相對感光 疋件之兩端具有一黏膠，以#由黏膠將薄片目定於定位凸 緣。或藉由彈片或扣件等方式亦可將薄片固定於定位凸緣。 本卷明之另一態樣係為一種顯影裝置之滾軸間隙調整 裝置’此顯影裝置係用以提供一列印裝置成像所需之碳 粉。滾軸間隙調整裝置包含具有一顯影滾轴之至少一碳粉 固定顯影滾轴之一滾軸支撐架，以及貼附於滾軸支撐 :上之至7間隙调整疋件，以提高顯影裝置中顯影滾軸 疋4之精確度，袞軸支擇架之兩端各具有—圓弧凸緣，且 圓弧凸緣與顯衫滾軸較佳地係為一共軸配置，且圓弧凸緣 1298294 ^徑略大㈣影滾軸之半徑。間隙調整元件係為至少一 ^片，貼附於滾軸支#架兩端之圓弧凸緣。薄片之材料可 光了樹脂(响)，或為—金屬。每一個薄片非相對感 ^之兩端具有—黏膠，以藉由黏膠將薄片固定於圓弧 緣。或錯由彈片或扣件等方式亦可將薄片固定於定位凸 緣。 本發明之列印裝置之間隙調整結構係藉由感光元件支 撐件支撐碳粉投射區之感光元件，以維持感光元件與對應 …頁〜衷置之碳粉匣之顯影滾軸間的顯影間隙，且感光元件 支撐件與定位托㈣，錢用突起與凹槽的浮動式輛合作 為固定方式’因此可減少習知中支樓結構因螺絲組裝所帶 來的應力造成的形變影響。顯影裝置之碳粉匣中更包含滾 軸間隙調整裝置，藉由薄片補償顯影滾軸與感光元件間的 顯影間隙，以提高滾軸支撐架接觸感光元件支撐件以定位 顯影滾軸的精密度，使感光元件與顯影滾軸間的顯影間隙 維持一定，進而提高碳粉成像的均勻性及成像的品質。 【實施方式】 以下將以配合圖式詳細說明本發明之精神，任何所 屬技術領域中具有通常知識者在瞭解本發明之較佳實施 例後’當可由本發明所教示之技術，加以改變及修飾， 其並不脫離本發明之精神與範圍。 參照第1圖，其係繪示本發明之列印裝置之間隙調整 結構一較佳實施例之側視圖。列印裝置包含一感光裝置100 與一顯影裝置160。感光裝置100包含一感光裝置框架 1298294 110 一感光元件150，與至少一感光元件支撐件i3〇。感 光元件150較佳係為一感光帶，套裝於感光裝置框架u〇 上，並藉由複數個轉動滾輪114,使感光元件15Q沿箭頭a 之捲動方向捲動。顯影裝置160具有複數個碳粉匣17〇，藉 由感光元件15〇之捲動，碳粉匣17〇之碳粉可跳躍至感光 元件150上之碳粉投射區（潛像區），以形成影像。感光裝置 100中之感光元件支撐件丨，係配置於對應碳粉匣1之 感光裝置框架11〇上，並支撐對應之感光元件15〇上之碳 粉投射區。此列印裝置可藉由感光元件支撐件13〇維持感 光元件150與碳粉匣170間之顯影間隙d，進而提高碳粉成 像的品質。 參照第2A圖及第2B圖，其係分別繪示本發明之列印 裝置之間隙調整結構另一較佳實施例之爆炸圖及組合立體 視圖。感光裝置框架110具有一軸向112，感光元件支撐件 130之兩端則是固定於軸向112相對兩端之感光裝置框架 11〇上，且每一感光元件支撐件130係對應於顯影裝置 中，每一碳粉匣170之顯影滾軸172(參考第4圖）之位置， 用以支樓奴叙投射區之感光元件丨5〇。每一個感光元件支揮 件130均具有一條狀突起132，且條狀突起132具有一圓弧 表面以與碳粉投射區之感光元件15〇接觸，且條狀突起 係與軸向112平行。感光裝置支撐件13〇之材料較佳係為 一合金、金屬或塑膠，例如：較佳的是經過陽極處理（311〇'<1= process)的鋁合金’以提高表面的光滑度。 感光裝置100可包含轉動滚輪114，配置於感光裝置框 架110上，且轉動滾輪114係平行於軸向112。藉由轉動此 11 ⑧ 1298294 轉動滾輪114,以捲動套裝於感光裝置框架110及感光元件 支樓件130上之感光元件15〇。感光裝置ι〇〇可更包含複數 個定位托架120,配置於軸向112相對兩端之感光裝置框架 110上。定位托架120較佳係利用複數個螺絲118，穿過定 位托架120及感光裝置框架11()上的螺絲孔116，以將定位 托架120固定於感光裝置框架no上。定位托架12〇上可 具有定位用之複數個突起122,而感光裝置支撐件13〇的兩 端，則具有對應之複數個凹槽134,藉由凹槽134耦合於突 起122,以將感光元件支撐件13〇浮動式地（fl〇ating)定位於 定位托架120上。定位托架12〇具有一特定傾斜角度，使 得疋位於定位托架120上之複數個感光元件支撐件13〇,可 以相對於所對應之碳粉匣17〇進行角度調整，使感光元件 150可平順地套裝於感光元件支撐件13〇上。凹槽134與突 起122之形狀較佳係為圓形。感光裝置1〇〇可更包含複數 個挾持件140，配置於軸向112的相對兩端，挾持件j 4〇 具有複數個定位孔142，配置於對應突起122處，用以與定 位托架120上之突起122卡合，以限定感光元件支撐件13〇 於平行軸向112方向之位移。 藉由上述挾持件140與定位托架120的卡合方式，以 將感光元件支撐件13〇固定於感光裝置框架11〇上，將可 使侍感光元件支撐件13〇於y方向上保持浮動的固定方 式。因此，可減少過去支撐結構因使用螺絲組裝所造成的 形變，使感光元件150在感光裝置1〇〇上滾動時，表面不 會出現波動不平的情形。 參照第3圖，其係繪示本發明之列印裝置之間隙調整 ⑧ 12 1298294 、’、口構又較佳實施例之側視圖。列印裝置之間隙調整結構 係用以維持感光元件150與碳粉匣17〇間之顯影間隙d。此 實施例中，感光元件150係為一感光帶，且套裝威 置及感光元件支撐件130上。= 置較佳地係為一對一地對應於感光元件支撐件丨上之條 狀圓弧突起132,以藉由條狀圓弧突起132支撐碳粉投射區 之感光元件150,進而維持感光元件15〇與碳粉匣17〇間的 顯影間隙d。條狀圓弧突起132之圓弧表面之半徑較佳地係 5〇〜300毫米。本實施例中，條狀突起132之圓弧表面約為 125毫米，以使感光帶15〇可在條狀突起132之圓弧表面上 順利地滾冑。感光元# 15〇較佳係為一有機感光帶(〇rganic photoconductorbelt ; 〇PCbelt)。感光元件支撐件 13〇 與顯 影裝置之碳粉匣170之數量較佳係同為四個，以對應四色 之碳粉H 170。 參考第4圖，其係繪示本發明之列印裝置之間隙調整 結構中，其碳粉匣之一滾軸間隙調整裝置一較佳實施例之 示意圖。碳粉匣170包含有一顯影滾軸172，以及用來固定 顯影滾軸172之一滾軸支撐架174。碳粉匣17〇係藉由轉動 顯影滾軸172,帶出碳粉匣17〇中的碳粉，並利用靜電力將 奴粉吸附於感光元件150上的碳粉投射區。由於，顯影滾 軸172與滾軸支撐架174在製造時會出現些許的公差，因 此，顯影滾軸172組裝於滾軸支撐架174時的相對位置會 出現些許的個別差異。如此一來，將使得顯影滾軸172與 感光元件150間的顯影間隙d無法達到一致均勻值，導致 碳粉吸附的狀況不佳，影響到成像的品質。因此，顯影裝 13 1298294 置之妷粉匣170需要一間隙調整裝置，以精確調整顯影滚 軸17 2的位置。 同時參照第3圖及第4圖，碳粉匣丨70中，顯影滾軸 172係女裝於滾軸支撐架174中，而滾軸支撐架174的兩端 具有一定位凸緣178，以接觸感光元件支撐件13〇，進而固 定顯影滾軸172的安裝位置。定位凸緣178較佳係為一圓 弧凸緣。定位凸緣178係抵住感光元件支撐件13〇，而使得 顯影滾軸172與感光元件150間出現顯影間隙d。顯影滾軸 172與疋位凸緣178之圓弧凸緣較佳地係為一共軸配置，且 將定位凸緣178的半徑設計為略大於顯影滾軸172的半 徑，但兩者間之差值不可大於顯影間隙d。由於定位凸緣 178與顯影滾軸172的組裝誤差值而使得顯影間隙d值無法 保持精密。故碳粉匣170之滾軸間隙調整裝置具有複數個 :曰 1隙調整元件，例如薄片18〇，薄片18〇可貼附於滾軸支撐 架174上，以調整顯影滾軸172與定位凸緣178間之組裝 誤差，進而提鬲顯影裝置16〇中之顯影滾軸172定位時之 精密度。將薄片180貼附於滾軸支撐架174之定位凸緣178 藉由貼附適當厚度之薄片18〇於定位凸緣178與條狀 突起132之間，以調整顯影滾軸172與感光元们％間的 距離，使其接近所期望之顯影間隙d。如此一來，當滾軸支 撐木Π4接觸感光疋件支撐件13〇以固定顯影滾軸時， 可藉由薄片180提高顯影滾軸172定位之精密度，進而有 效地維持顯影滾軸172與感光元件15G間的顯影間隙d，以 提高碳粉成像品質。薄# 18〇可直接利用定位凸緣Μ盎 感光元件支撐# m接觸時之正向力固定。或者，於薄片 1298294 180兩端部，亦即，非相對於感光元件15〇表面之薄片1⑽ 的末端，可塗佈有一黏膠，以利用黏膠將薄片18〇固定於 定位凸緣178上。或藉由彈片或扣件等方式亦可將薄片18〇 固定於定位凸緣178。 顯影滾軸172與定位凸緣178間的差值之範圍依製造 之精密度而控制在-小範圍内，如15μηι至65μηχ内。而 補償用之薄片180的厚度，較佳地是在不同的厚度之中， 挑選一個最接近差值的尺寸。舉例而言，薄片18〇的厚度 > 可為 20μιη、25μπι、30μηι、35μιη、40μηι、45μηι、50μιη、 55μηι，或是60μπι所組成之群組或其他不同尺寸之群組。 薄片180之材料可為一金屬。薄片18〇之材料可為一塑膠， 較佳係為一聚S旨樹脂（mylar)。。 由上述本發明較佳實施例可知，應用本發明具有下列 優點。本發明之列印裝置之間隙調整結構係藉由感光元件 支撐件支撐碳粉投射區之感光元件，以維持感光元件與對 應顯影裝置之碳粉匣之顯影滾軸間的顯影間隙，且感光元 > 件支撐件與定位托架間，係使用突起與凹槽的浮動式耦合 作為固定方式，因此可減少習知中支撐結構因螺絲組裝所 帶來的應力造成的形變影響。顯影裝置之碳粉匣中更包含 滾軸間隙調整裝置，藉由薄片補償顯影滾軸與滚軸支撐架 間的差值，以提高滾軸支撐架接觸感光元件支撐件以定位 顯影滾軸的精確度，使感光元件與顯影滾軸間的顯影間隙 維持一定’進而提高碳粉成像的均勻性及成像的品質。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何所屬技術領域中具有通常知識者，在 15 1298294 不脫離本發明之精神和範圍内，當可作各種之更動與潤 飾因此本發明之保護範圍當視後附之申請專利範圍所界 定者為準。 【圖式簡單說明】 為桌本發明之上述和其他目的、特徵、優點與實施例 旎更明顯易懂，所附圖式之詳細說明如下·· 第1圖係繪示本發明之列印裝置之間隙調整結構一較 佳實施例之側視圖。 第2A圖係緣示本發明之列印裝置之間隙調整結構另 一較佳實施例之爆炸圖。 第2B圖係緣示如第2A圖之本發明之列印裝置之間隙 調整結構之組合立體視圖。 第3圖係緣示本發明之列印裝置之間隙調整結構又一 較佳實施例之侧視圖。 第4圖係緣示本發明之列印装置之間隙調整結構中， 其碳㈣之滾軸間隙調整裝置—較佳實施例之示意圖。 【主要元件符號說明】 100 :感光裝置 112 :軸向 π 6 :螺絲孔 120 :定位托架 13 0 :感光元件支撐件 1J〇 :感光裝置框架 114 :轉動滾輪 Π8 :螺絲 122 :突起 132 :條狀突起 ⑧ 1298294 134 ··凹槽 150 ··感光元件 170 :碳粉匣 174 :滾軸支撐架 180 :薄片 y :方向 140 :挾持件 160 :顯影裝置 172 :顯影滾軸 178 :定位凸緣 d :顯影間隙 A :捲動方向1298294 IX. Description of the Invention: [Technical Field] The present invention relates to a gap adjusting structure of a printing device, and more particularly to a developing gap adjusting structure of a photoelectric imaging printing device. [Prior Art] Photoelectric The image-printing device performs image printing by means of electrophotography (EPG). Photoelectric imaging has several steps, including at least charging, exposure, developing, transferring, and fusing. When the printing device prints images, first A uniform charge is applied to the surface of a photoconductor by means of a charger, which is a power-discharging step. Then, an exposure step is performed, and the image to be printed is converted into an optical signal by a light-emitting diode (LED) or a laser, and is irradiated onto the photosensitive element with uniform charge to generate a Corresponding electrostatic latent image. After the latent image required for printing is formed on the photosensitive member, the _% step is performed. The toner on the developing device is attached to the photosensitive member by the electrostatic force to develop the electrostatic latent image. After the development step is completed, the adsorbed toner on the photosensitive member can be transferred to a printing paper or other substrate medium by a conventional method, which is a transfer step. Finally, a hot roller and a pressure roller are used to fix the toner on the paper and print the fixing step. 6 1298294 Due to the non-contact developing device, the toner can use electrostatic force to jump the developing gap between the developing roller and the photosensitive member, so that the toner adheres to the latent image area on the photosensitive member. Therefore, the control of the development gap will affect the quality of the image. The photosensitive element in the prior art may be an organic photoreceptor belt (〇 belt PC belt), and the photoreceptor belt is sleeved on a struts. Since the support structure of the photoreceptor belt uses the screw as the locking member, the support structure is affected by the stress when the screw is locked, and the shape is only generated, so that the surface of the photoreceptor belt fluctuates when rotated. After the assembly roller (devei〇ping r〇ller) in the developing device is assembled, it can inevitably cause a slight error with the support structure of the developing roller, which affects the developing gap between the developing roller and the photosensitive member. Precision. Both of the above cases cause the developing gap of the photosensitive belt and the developing roller to be inconsistent, so that the toner cannot be uniformly adsorbed on the photosensitive member, thereby affecting the quality of the image. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a gap adjusting structure for a printing apparatus for maintaining a developing gap between a photosensitive member and a developing roller, thereby improving the quality of toner image formation. ▲ Another object of the present invention is to provide a roller gap blanking device for a developing device to compensate for the difference between the developing roller and the developing gap, thereby improving the roller support to contact the photosensitive device to position the developing roller and the photosensitive The precision of the development gap between devices. In accordance with the above object of the present invention, a gap adjustment 1298294 of a printing apparatus is proposed to maintain a photosensitive device and a developing device H (four) gap. The gap adjusting structure of the printing device comprises a photosensitive device frame, a photosensitive element "and at least one photosensitive member support member. The photosensitive device frame has an axial direction, and both ends of the photosensitive member supporting member are fixed to the photosensitive member frames at opposite axial ends, and each of the photosensitive member supporting members has a strip-like projection that is flat with the axial direction. The photosensitive member is attached to the photosensitive device frame and the photosensitive member support member. The developing device has at least one toner g disposed on the corresponding strip-like projections to support the photosensitive member by the strip-like projections, thereby maintaining the developing gap between the photosensitive member and the toner cartridge. Each of the strip-shaped projections has a circular arc surface having a radius of about 5 〇 to 3 mm. The gap adjusting structure of the printing device further comprises a plurality of positioning brackets disposed on the photosensitive frame frames at opposite axial ends to position the photosensitive member support member. The gap adjustment structure of the printing device further includes a plurality of screws for fixing the positioning = frame to the photosensitive frame by screws. The positioning bracket has a plurality of protrusions, and each of the two end portions of the photosensitive member has a groove corresponding to the protrusion, so as to couple the photosensitive element support to the positioning bracket by coupling the groove and the protrusion. On the shelf. Each of the positioning brackets has an inclination angle ′ so that the photosensitive member of the positioning bracket is cut to perform the toner-angle adjustment. The gap adjusting structure of the printing device further includes a plurality of holding members disposed at opposite ends of the axial direction to floatably fix the positioning bracket and the photosensitive member support member to the photosensitive device frame. Each of the holding members has a plurality of positioning holes arranged in the protrusions of the corresponding positioning brackets, wherein the positioning holes are engaged with the protrusions to define displacement of the photosensitive member support members in the flat direction. The material of the photosensitive member support member may be an alloy, a metal or a plastic, and is preferably an anodized alloy. Each toner g 1298294 includes a roller gap adjustment device, and each roller gap adjusting device includes a developing roller and a roller support frame. The developing roller is disposed in parallel with each of the photosensitive member supports to feed the toner in the toner cartridge to adsorb the toner on the photosensitive member. The roller support frame is for fixing the developing roller, wherein each of the two ends of the roller support frame has a positioning flange for contacting the photosensitive member I to fix the position of the developing roller. The positioning flange is preferably a circular arc flange, and the arc flanges at both ends of the roller support frame and the developing roller rudder are arranged in a coaxial manner, and the radius of the circular arc flange is slightly larger than the developing roller The radius of the shaft, and the difference between the two is not greater than the development gap. The roller gap adjusting device may further comprise at least one sheet attached to the circular arc flange at both ends of the roller support frame for compensating for the developing roller and the photosensitive element and the value. The range of the difference is controlled by a precision of a small == difference, such as 15 μm to 65 μm, and the thickness of the sheet may be selected from 2 (5), 25 μm, 30 μm, 35 μm, 4, 45 μm, 5 Groups of 〇_, 55隅, and 卿(五) or groups of other different sizes. The thin material may be a poly-lip or a metal. Each of the sheets has a glue at both ends of the non-relative photosensitive member, and the sheet is fixed by the adhesive to the positioning flange. The sheet can also be fixed to the positioning flange by means of a spring piece or a fastener. Another aspect of the present invention is a roller gap adjusting device for a developing device. The developing device is for providing toner for image formation by a printing device. The roller gap adjusting device comprises a roller support frame of at least one toner fixing developing roller having a developing roller, and a gap adjusting member attached to the roller support: to improve development in the developing device The accuracy of the roller 疋 4, the two ends of the 支 shaft support frame have a circular arc flange, and the arc flange and the shirt roller are preferably arranged in a coaxial configuration, and the arc flange 1298294 ^ The diameter is slightly larger (four) the radius of the shadow roller. The gap adjusting member is at least one piece and attached to the arcuate flange at both ends of the roller bracket # frame. The material of the sheet can be made of resin (sound) or metal. Each of the sheets has a non-relative feeling, and both ends have a glue to fix the sheet to the arc edge by the adhesive. Alternatively, the sheet may be fixed to the positioning flange by means of a spring piece or a fastener. The gap adjusting structure of the printing device of the present invention supports the photosensitive element of the toner projection area by the photosensitive element supporting member to maintain the developing gap between the photosensitive element and the developing roller corresponding to the toner cartridge. Moreover, the photosensitive member support member and the positioning bracket (4), the money is used in a fixed manner by the floating type of the protrusion and the groove, so that the deformation effect caused by the stress caused by the screw assembly in the conventional branch structure can be reduced. The toner cartridge of the developing device further comprises a roller gap adjusting device for compensating the developing gap between the developing roller and the photosensitive member by the sheet to improve the precision of the roller supporting frame contacting the photosensitive member support member for positioning the developing roller. The development gap between the photosensitive element and the developing roller is maintained constant, thereby improving the uniformity of toner imaging and the quality of imaging. The present invention will be described in detail with reference to the accompanying drawings, which are to be understood by those of ordinary skill in the art of the invention. It does not depart from the spirit and scope of the invention. Referring to Fig. 1, there is shown a side view of a preferred embodiment of the gap adjusting structure of the printing apparatus of the present invention. The printing device includes a photosensitive device 100 and a developing device 160. The photosensitive device 100 includes a photosensitive device frame 1298294 110, a photosensitive member 150, and at least one photosensitive member support member i3. The photosensitive element 150 is preferably a photosensitive belt which is placed on the photosensitive device frame u〇, and the photosensitive member 15Q is rolled in the scrolling direction of the arrow a by a plurality of rotating rollers 114. The developing device 160 has a plurality of toner cartridges 17〇, and the toner of the toner cartridge 17〇 can jump to the toner projection region (latent image region) on the photosensitive member 150 to form by the rolling of the photosensitive member 15 image. The photosensitive member supporting member 感光 in the photosensitive device 100 is disposed on the photosensitive member frame 11 of the corresponding toner cartridge 1 and supports the toner projection region on the corresponding photosensitive member 15''. This printing apparatus can maintain the developing gap d between the photosensitive element 150 and the toner cartridge 170 by the photosensitive member supporting member 13, thereby improving the quality of the toner image formation. Referring to Figures 2A and 2B, there are shown exploded views and combined perspective views of another preferred embodiment of the gap adjusting structure of the printing apparatus of the present invention. The photosensitive device frame 110 has an axial direction 112, and both ends of the photosensitive element supporting member 130 are fixed on the photosensitive device frame 11A at opposite ends of the axial direction 112, and each photosensitive element supporting member 130 corresponds to the developing device. The position of the developing roller 172 (refer to FIG. 4) of each toner cartridge 170 is used for the photosensitive element of the projection area of the branch building. Each of the photosensitive member holders 130 has a strip-like projection 132, and the strip-like projection 132 has a circular arc surface to be in contact with the photosensitive member 15A of the toner projection area, and the strip projections are parallel to the axial direction 112. The material of the photosensitive member support member 13 is preferably an alloy, metal or plastic. For example, an anodized (311 〇 '<1=process) aluminum alloy is preferred to improve the smoothness of the surface. The photosensitive device 100 can include a rotating roller 114 disposed on the photosensitive device frame 110, and the rotating roller 114 is parallel to the axial direction 112. The roller 114 is rotated by rotating the lens 81 to rotate the photosensitive member 15 套装 disposed on the photosensitive member frame 110 and the photosensitive member fulcrum member 130. The photosensitive device ι can further include a plurality of positioning brackets 120 disposed on the photosensitive device frame 110 at opposite ends of the axial direction 112. Preferably, the positioning bracket 120 utilizes a plurality of screws 118 through the positioning bracket 120 and the screw holes 116 in the photoreceptor frame 11 () to secure the positioning bracket 120 to the photoconductor frame no. The positioning bracket 12 can have a plurality of protrusions 122 for positioning, and the two ends of the photosensitive device support 13 have a corresponding plurality of grooves 134, and the grooves 134 are coupled to the protrusions 122 to be photosensitive. The component support 13 is positioned floating on the positioning bracket 120 in a floating manner. The positioning bracket 12 〇 has a specific inclination angle, so that the plurality of photosensitive element supporting members 13 疋 located on the positioning bracket 120 can be angularly adjusted with respect to the corresponding toner 匣 17 ,, so that the photosensitive element 150 can be smoothed. The ground cover is placed on the photosensitive member support member 13''. The shape of the recess 134 and the projection 122 is preferably circular. The photosensitive device 1 can further include a plurality of holding members 140 disposed at opposite ends of the axial direction 112. The holding member j 4 has a plurality of positioning holes 142 disposed at the corresponding protrusions 122 for positioning with the positioning bracket 120. The upper projections 122 are engaged to define displacement of the photosensitive member support member 13 in the direction of the parallel axial direction 112. By the manner in which the holding member 140 and the positioning bracket 120 are engaged to fix the photosensitive member support member 13 to the photosensitive device frame 11A, the photosensitive member supporting member 13 can be kept floating in the y direction. a fixed way. Therefore, it is possible to reduce the deformation of the support structure in the past due to the use of the screw assembly, so that the surface of the photosensitive member 150 does not fluctuate when it rolls on the photosensitive device 1〇〇. Referring to Fig. 3, there is shown a side view of a gap adjustment 8 12 1298294, ', and a preferred embodiment of the mouthpiece of the printing apparatus of the present invention. The gap adjusting structure of the printing device is for maintaining the developing gap d between the photosensitive member 150 and the toner cartridge 17. In this embodiment, the photosensitive member 150 is a photoreceptor belt and is placed on the photosensitive member support member 130. Or preferably one-to-one corresponding to the strip-shaped arcuate projections 132 on the photosensitive member support member to support the photosensitive member 150 of the toner projection area by the strip-shaped circular projections 132, thereby maintaining the photosensitive member The developing gap d between 15〇 and the toner 匣17〇. The radius of the arcuate surface of the strip-shaped arcuate projection 132 is preferably 5 〇 to 300 mm. In the present embodiment, the arcuate surface of the strip-shaped projection 132 is about 125 mm so that the photosensitive belt 15 can smoothly roll on the arcuate surface of the strip-like projection 132. Photosensitive element #15〇 is preferably an organic photosensitive belt (〇rganic photoconductorbelt; 〇PCbelt). The photosensitive member support member 13 is preferably four in number with the toner cartridge 170 of the developing device to correspond to the four-color toner H 170. Referring to Fig. 4, there is shown a schematic view of a preferred embodiment of a roller gap adjusting device for toner cartridge in the gap adjusting structure of the printing apparatus of the present invention. The toner cartridge 170 includes a developing roller 172 and a roller support frame 174 for fixing the developing roller 172. The toner cartridge 17 picks up the toner in the toner cartridge 17 by rotating the developing roller 172, and adsorbs the slave powder on the toner projection region on the photosensitive member 150 by electrostatic force. Since the developing roller 172 and the roller support frame 174 are subjected to a slight tolerance during manufacture, there are slight differences in the relative positions of the developing roller 172 when assembled to the roller support frame 174. As a result, the development gap d between the developing roller 172 and the photosensitive member 150 cannot be made uniform, which results in poor toner adsorption and affects the quality of the image. Therefore, the developing unit 13 1298294 requires a gap adjusting device to precisely adjust the position of the developing roller 17 2 . Referring also to Figures 3 and 4, in the toner cartridge 70, the developing roller 172 is worn in the roller support frame 174, and both ends of the roller support frame 174 have a positioning flange 178 for contact. The photosensitive member support member 13 is fixed to fix the mounting position of the developing roller 172. The locating flange 178 is preferably a circular arc flange. The positioning flange 178 abuts against the photosensitive member support 13A such that a developing gap d occurs between the developing roller 172 and the photosensitive member 150. The arcuate flange of the developing roller 172 and the clamping flange 178 is preferably in a coaxial configuration, and the radius of the positioning flange 178 is designed to be slightly larger than the radius of the developing roller 172, but the difference therebetween Can not be larger than the development gap d. The value of the developing gap d cannot be kept precise due to the assembly error value of the positioning flange 178 and the developing roller 172. Therefore, the roller gap adjusting device of the toner cartridge 170 has a plurality of: a gap adjusting member, such as a sheet 18, which can be attached to the roller support frame 174 to adjust the developing roller 172 and the positioning flange. The assembly error of 178 further improves the precision of positioning of the developing roller 172 in the developing device 16A. The positioning flange 178 of the sheet 180 attached to the roller support frame 174 is attached between the positioning flange 178 and the strip protrusion 132 by attaching a sheet 18 of appropriate thickness to adjust the developing roller 172 and the photosensitive member. The distance between them is close to the desired development gap d. In this way, when the roller supporting raft 4 contacts the photosensitive member support 13 to fix the developing roller, the precision of the positioning of the developing roller 172 can be improved by the sheet 180, thereby effectively maintaining the developing roller 172 and the photosensitive The developing gap d between the elements 15G to improve the toner image quality. Thin # 18〇 can be directly used by the positioning flange Μ photosensitive element support # m contact positive force fixed. Alternatively, at both ends of the sheet 1298294 180, that is, at the end of the sheet 1 (10) which is not opposite to the surface of the photosensitive member 15, a glue may be applied to fix the sheet 18 to the positioning flange 178 by means of adhesive. The sheet 18A can also be fixed to the positioning flange 178 by means of a spring or a fastener. The range of the difference between the developing roller 172 and the positioning flange 178 is controlled within a small range, such as 15 μηι to 65 μη, depending on the precision of manufacture. The thickness of the sheet 180 for compensation is preferably among different thicknesses, and a size closest to the difference is selected. For example, the thickness of the sheet 18〇> may be a group of 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, or 60 μm, or a group of other different sizes. The material of the sheet 180 can be a metal. The material of the sheet 18 can be a plastic, preferably a mylar. . It will be apparent from the above-described preferred embodiments of the present invention that the application of the present invention has the following advantages. The gap adjusting structure of the printing device of the present invention supports the photosensitive element of the toner projection area by the photosensitive element supporting member to maintain the developing gap between the photosensitive element and the developing roller of the toner cartridge corresponding to the developing device, and the photosensitive element > Between the support member and the positioning bracket, the floating coupling of the protrusion and the groove is used as a fixing manner, so that the deformation effect of the conventional support structure due to the stress caused by the screw assembly can be reduced. The toner cartridge of the developing device further comprises a roller gap adjusting device for compensating the difference between the developing roller and the roller support frame by the sheet to improve the accuracy of the roller support frame contacting the photosensitive member support member for positioning the developing roller. The degree of maintenance is maintained between the photosensitive element and the developing roller to further improve the uniformity of toner imaging and the quality of imaging. While the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the scope of the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. A side view of a preferred embodiment of the gap adjustment structure. Fig. 2A is an exploded view showing another preferred embodiment of the gap adjusting structure of the printing apparatus of the present invention. Fig. 2B is a perspective view showing the combination of the gap adjusting structure of the printing apparatus of the present invention as shown in Fig. 2A. Fig. 3 is a side elevational view showing still another preferred embodiment of the gap adjusting structure of the printing apparatus of the present invention. Fig. 4 is a schematic view showing a preferred embodiment of a carbon (four) roller gap adjusting device in the gap adjusting structure of the printing device of the present invention. [Main component symbol description] 100 : Photosensitive device 112 : Axial π 6 : Screw hole 120 : Positioning bracket 13 0 : Photosensitive element support 1J 〇: Photosensitive device frame 114 : Rotating roller Π 8 : Screw 122 : Protrusion 132 : Strip Protrusion 8 1298294 134 ··groove 150 ··photosensitive element 170 : toner cartridge 174 : roller support frame 180 : sheet y : direction 140 : gripping member 160 : developing device 172 : developing roller 178 : positioning flange d : Developing gap A: scrolling direction
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