JPH0345566U

JPH0345566U -

Info

Publication number: JPH0345566U
Application number: JP10582989U
Authority: JP
Priority date: 1989-09-08
Filing date: 1989-09-08
Publication date: 1991-04-26

Description

[Brief explanation of the drawing]

第１図は本考案による定着装置における定着ロ
ーラと駆動ギヤーとの連結部の分解斜視図、第２
図はその組立状態の断面図、第３図は該定着装置
の全体断面図、第４図は該定着装置を備えるレー
ザプリンタの概要構成図である。第５図は上記連
結部の他の例の分解斜視図、第６図及び第７図は
その一部の斜視図である。第８図及び第９図はそ
れぞれ別の例の斜視図、第１０図は第９図の例の
断面図である。第１１図及び第１２図はさらに他
の例の斜視図及び断面図、第１３図はさらに別の
例の断面図、第１４図は定着ローラのキー位置決
め孔とキーとの嵌合関係を良くした例の断面図、
第１５図は両端エツジの絞り込んだ定着ローラの
断面図である。第１６図及び第１７図はそれぞれ
キーの他の例を示し、ａは斜視図、ｂは断面図で
ある。第１８図及び第１９図はそれぞれ従来例の
分解斜視図である。２８……定着ローラ、４０……駆動ギヤー、４
１……キー、４２，５０……足、４３，５１……
キー位置決め孔、４６……キー溝、４７……軸孔
。 FIG. 1 is an exploded perspective view of the connecting portion between the fixing roller and the drive gear in the fixing device according to the present invention, and FIG.
3 is a sectional view of the entire fixing device, and FIG. 4 is a schematic configuration diagram of a laser printer equipped with the fixing device. FIG. 5 is an exploded perspective view of another example of the connecting portion, and FIGS. 6 and 7 are partial perspective views thereof. 8 and 9 are perspective views of different examples, and FIG. 10 is a sectional view of the example of FIG. 9. 11 and 12 are perspective views and sectional views of still another example, FIG. 13 is a sectional view of still another example, and FIG. 14 shows a good fitting relationship between the key positioning hole of the fixing roller and the key. A cross-sectional view of an example,
FIG. 15 is a sectional view of the fixing roller with both edges narrowed down. FIGS. 16 and 17 each show other examples of the key, in which a is a perspective view and b is a sectional view. FIGS. 18 and 19 are exploded perspective views of conventional examples, respectively. 28... Fixing roller, 40... Drive gear, 4
1...key, 42,50...foot, 43,51...
Key positioning hole, 46... key groove, 47... shaft hole.

Claims

[Scope of utility model registration request]

In a fixing device in which a shaft hole of a drive gear is fitted into a fixing roller and fixed by a key, the lower surface of the key is a curved surface along the outer peripheral surface of the fixing roller, and positioning feet are provided protruding from the lower surface of the key, The fixing device is further characterized in that the fixing roller is provided with a key positioning hole that fits with the positioning foot, and the shaft hole is further provided with a key groove that fits with the key.