JPH0262428U - - Google Patents
Info
- Publication number
- JPH0262428U JPH0262428U JP13884188U JP13884188U JPH0262428U JP H0262428 U JPH0262428 U JP H0262428U JP 13884188 U JP13884188 U JP 13884188U JP 13884188 U JP13884188 U JP 13884188U JP H0262428 U JPH0262428 U JP H0262428U
- Authority
- JP
- Japan
- Prior art keywords
- optical unit
- optical
- guide member
- driven member
- unit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Description
第１図は本考案の一実施例である光学ユニツト
の傾き防止機構を備えた画像形成装置の概略断面
図、第２図は前記光学ユニツトの傾き防止機構を
示す概略斜視図、第３図ａは同光学ユニツトが下
方に位置した場合を示す概略横断面図、第３図ｂ
は同光学ユニツトが上方に位置した場合を示す概
略横断面図、第４図ａは従来の光学ユニツト駆動
系の概略正面図、第４図ｂは同駆動系の概略横断
面図である。
１０……レンズ（光学部材）、１２……レンズ
取付板、１２ａ，１２ｂ……ラツク（被駆動用部
材）、５０……ガイド軸（ガイド部材）、５２，
５３……駆動ギヤ（駆動手段）、５４……傾き防
止用ギヤ（傾き防止用部材）、６０……光学ユニ
ツト。
FIG. 1 is a schematic sectional view of an image forming apparatus equipped with an optical unit tilt prevention mechanism which is an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the optical unit tilt prevention mechanism, and FIG. 3a is a schematic cross-sectional view showing the case where the optical unit is positioned below, Figure 3b
4 is a schematic cross-sectional view showing the case where the optical unit is positioned above, FIG. 4a is a schematic front view of a conventional optical unit drive system, and FIG. 4b is a schematic cross-sectional view of the same drive system. 10... Lens (optical member), 12... Lens mounting plate, 12a, 12b... Rack (driven member), 50... Guide shaft (guide member), 52,
53... Drive gear (driving means), 54... Tilt prevention gear (tilt prevention member), 60... Optical unit.
Claims (1)
材が保持されるとともに被駆動用部材が設けられ
た光学ユニツトと、 この光学ユニツトを光軸方向に移動可能に案内
するガイド部材と、 このガイド部材と対向配置されるとともに前記
光学ユニツトの被駆動用部材に係合し、該ユニツ
トを移動させる駆動手段とを備えた画像形成装置
において、 上記光学ユニツトの被駆動用部材と駆動手段と
の係合点を通るガイド部材と平行な線上において
、該ユニツトがガイド部材に案内されて光軸方向
に移動したとき、同被駆動用部材に係合し得る傾
き防止用部材を具備したことを特徴とする画像形
成装置における光学ユニツトの傾き防止機構。[Scope of Claim for Utility Model Registration] An optical unit in which an optical member for forming an image of reflected light from a document on an exposure surface is held and a driven member is provided, and the optical unit is movable in the optical axis direction. An image forming apparatus comprising: a guide member for guiding; and a driving means disposed opposite to the guide member and engaging with a driven member of the optical unit to move the driven member of the optical unit; A tilt prevention member that can engage with the driven member when the unit is guided by the guide member and moves in the optical axis direction on a line parallel to the guide member passing through an engagement point between the driving member and the drive means. What is claimed is: 1. A tilt prevention mechanism for an optical unit in an image forming apparatus, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13884188U JPH0262428U (en) | 1988-10-25 | 1988-10-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13884188U JPH0262428U (en) | 1988-10-25 | 1988-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0262428U true JPH0262428U (en) | 1990-05-10 |
Family
ID=31401554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13884188U Pending JPH0262428U (en) | 1988-10-25 | 1988-10-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0262428U (en) |
-
1988
- 1988-10-25 JP JP13884188U patent/JPH0262428U/ja active Pending
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