Developing apparatus and image forming apparatus
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- FUJIFILM BUSINESS INNOVATION CORP
- Filing Date
- 2024-11-29
- Publication Date
- 2026-06-10
AI Technical Summary
【0006】 請求項1の発明によれば、空気が供給されにくい箇所が存在する構成に比べ、現像装置における現像剤の堆積を生じにくくすることができる。 請求項2の発明によれば、軸方向一端部側および軸方向他端部側のうちの一方側からのみ、空気の供給を行う構成に比べ、塞ぎ部材と対向部材との間の間隙に入る空気の量を増すことができる。 請求項3の発明によれば、一端部側の開口の大きさと他端部側の開口の大きさとが同じである場合と比べ、一端部側の開口から間隙内に入る空気の量と、他端部側の開口から間隙内に入る空気の量との間に差をつけることができる。 請求項4の発明によれば、対向部材の軸方向における中央部側に位置する開口よりも、中央部側とは反対側に位置する開口の方が大きい場合に比べ、塞ぎ部材と構成部材との間の間隙内の現像剤が、反対側に位置するこの開口を通って間隙外へ向かうことを抑えることができる。 請求項5の発明によれば、空気が供給されにくい箇所が存在する構成に比べ、現像装置における現像剤の堆積を生じにくくすることができる。 請求項6の発明によれば、開口の上側と下側とで、開口を通る空気の流量を異ならせることができる。 請求項7の発明によれば、開口のうちの下側に位置する部分の幅の方が、開口のうちの上側に位置する部分の幅よりも小さい場合に比べ、間隙のうちの、現像剤が溜まりやすい下側に位置する部分に対して、より多くの空気の供給を行える。 請求項8の発明によれば、供給部材の軸方向における開口の位置と、この軸方向における入口部の位置とが一致する場合に比べ、開口を通って入口部に向かう空気の流量を増加させることができる。 請求項9の発明によれば、供給部材の軸方向における開口の位置と、この軸方向における入口部の位置とが一致する場合に比べ、開口を通って入口部に向かう空気の流量を増加させることができる。 請求項10の発明によれば、空気が供給されにくい箇所が存在する構成に比べ、現像装置における現像剤の堆積を生じにくくすることができる。
Smart Images
Figure 2026095187000001_ABST
Abstract
Claims
1. A developing apparatus comprising multiple components, wherein a developing agent is applied to an image holder that holds an image, An opening positioned facing the image holder, A sealing member that closes a portion of the opening, the sealing member being positioned with a gap between it and the component that is positioned on the opposite side from the installation side of the image holder, Equipped with, The system is configured to allow air to be supplied into the gap between the sealing member and the constituent member from outside the gap from multiple directions. Developing device.
2. The developing apparatus is provided with, as a component, an opposing member that is rotatably mounted and positioned opposite the image holder, The sealing member is positioned such that there is a gap between it and the opposing member. The blocking member has an axial end and an axial end that are rotatably mounted and whose positions in the axial direction are different from each other. Air can be supplied to the gap from both the axial end side and the axial end side of the sealing member. The developing apparatus according to claim 1.
3. Between the axial end of the sealing member and the opposing member, there is an opening on the one-end side that allows air to flow into the gap. Between the other axial end of the sealing member and the opposing member, there is an opening on the other end side that allows air to flow into the gap. The size of the opening on one end and the size of the opening on the other end are different. The developing apparatus according to claim 2.
4. The blocking member is positioned opposite the axial end of the opposing member and is positioned such that it has the gap between it and the end. Of the one-end opening and the other-end opening, the opening located on the opposite side from the central part in the axial direction of the opposing member is smaller than the opening located on the central part in the axial direction of the opposing member. The developing apparatus according to claim 3.
5. A supply member is positioned opposite the rotating image holder and along the axial direction of the image holder, and supplies developer to the image holder. A restricting member is positioned opposite the axial end of the supply member and with a gap between it and the end, and restricts the movement of the developer from the supply member side toward the image holder side. Equipped with, The regulating member has a central end which is the end located on the central side in the axial direction of the supply member, and an opposite end which is the end located on the opposite side from the central end, An opening is provided between the opposite end and the supply member to allow air from outside the gap to flow into the gap. Developing device.
6. The opening is provided in a manner that extends in the vertical direction. The width of the lower part of the opening and the width of the upper part of the opening are different. The developing apparatus according to claim 5.
7. The width of the lower portion is greater than the width of the upper portion. The developing apparatus according to claim 6.
8. An inlet portion into which the air to be drawn in enters is further provided, wherein the position of the rotating supply member in the direction of rotation is different from the installation position of the opening. The position of the opening in the axial direction of the supply member and the position of the inlet in the axial direction are different. The developing apparatus according to claim 5.
9. The inlet portion is provided such that it is positioned closer to the central part of the supply member in the axial direction than the central part of the supply member in the axial direction of the supply member. The developing apparatus according to claim 8.
10. An image forming apparatus comprising an image holder for holding an image to be formed, and a developing device for applying a developer to the image holder, wherein the developing device has the configuration of the developing device described in any one of claims 1 to 9.