JPS61117788U

JPS61117788U -

Info

Publication number: JPS61117788U
Application number: JP1985001723U
Authority: JP
Priority date: 1985-01-09
Filing date: 1985-01-09
Publication date: 1986-07-25
Also published as: JPH0237678Y2

Description

[Brief explanation of the drawing]

第１図ないし第４図は本考案の自転車用フロン
トデイレーラの実施例を示し、第１図は全体正面
図、第２図は内ガイドプレートと各スプロケツト
ないしチエンとの関係を示すとともに作用を説明
するための図、第３図は第２図の―線断面図
、第４図は内ガイドプレートの他の態様を示す正
面図、第５図は本考案が基礎とする従来のフロン
トデイレーラの全体正面図、第６図は第５図の
方向矢視図である。４……制御機構（パンタグラフリンク機構）、
９……内ガイドプレート、１０……外ガイドプレ
ート、Ｓ……スプロケツト、ｓ１……最小径スプ
ロケツト、ｓ２……中間スプロケツト、ｓ３……
最大径スプロケツト、Ｃ……チエン。 Figures 1 to 4 show an embodiment of the bicycle front derailleur of the present invention, with Figure 1 being an overall front view, and Figure 2 showing the relationship between the inner guide plate and each sprocket or chain and their functions. Figure 3 is a sectional view taken along the line -- in Figure 2, Figure 4 is a front view showing another aspect of the inner guide plate, and Figure 5 is a conventional front derailleur on which the present invention is based. FIG. 6 is a front view of the whole body, and FIG. 6 is a view taken in the direction of the arrow in FIG. 4...Control mechanism (pantograph link mechanism),
9...Inner guide plate, 10...Outer guide plate, S...Sprocket, s1...Minimum diameter sprocket, s2...Intermediate sprocket, s3...
Maximum diameter sprocket, C...Chain.

Claims

[Scope of utility model registration request]

A bicycle front comprising an inner guide plate and an outer guide plate facing each other so as to sandwich a chain about to be hung on a sprocket, and configured to move the inner guide plate and the outer guide plate in parallel in the outward and outward directions by a control mechanism. In the derailleur, the part A of the inner guide plate that is pressed when changing the chain that hangs over the intermediate sprocket to a sprocket with a larger diameter is
A front day for a bicycle, characterized in that the chain passing through the part B that is pressed when changing the chain applied to the smallest diameter sprocket to the intermediate sprocket is located substantially outside in the radial direction with respect to an arc concentric with the sprocket. Lela.