JPH0190688U

JPH0190688U -

Info

Publication number: JPH0190688U
Application number: JP18685887U
Authority: JP
Priority date: 1987-12-07
Filing date: 1987-12-07
Publication date: 1989-06-14

Description

[Brief explanation of the drawing]

第１図は側面図、第２図は平面図、第３図はク
ランクギヤーの詳細図である。 FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a detailed view of the crank gear.

補正昭６３．３．１０考案の名称を次のように補正する。考案の名称自転車のギヤークランクの機構実用新案登録請求の範囲、図面の簡単な説明を
次のように補正する。Amendment: March 10, 1981: The name of the invention is amended as follows. Title of the invention Bicycle gear crank mechanism The scope of the utility model registration claims and the brief description of the drawings are amended as follows.

【実用新案登録請求の範囲】ペタルギヤーと後車輪に設けられた駆動ギヤー
の間に、中間軸を設け、該中間軸には中間第１チ
エンギヤーと中間第２チエンギヤーを軸承させ、
更に該中間第１チエンギヤーとペタルギヤーとの
間には第１チエンベルトを掛止めして中間第１チ
エンギヤーをペタルギヤーに従動させ、また中間
第２チエンギヤーと駆動ギヤーとの間には第２チ
エンベルトを掛止させるように構成した自転車に
於いて、上記ペタルギヤーに取り付ける足踏みの
ためのギヤークランクＭ，Ｎを、その基端部に夫
々く字状折曲部ｍ，ｎを形成したクランク杆状に
構成したことを特徴とする自転車のギヤークラン
クの機構。[Claims for Utility Model Registration] An intermediate shaft is provided between the petal gear and the drive gear provided on the rear wheel, and a first intermediate chain gear and a second intermediate chain gear are supported on the intermediate shaft,
Furthermore, a first chain belt is hooked between the intermediate first chain gear and the petal gear to cause the intermediate first chain gear to follow the petal gear, and a second chain belt is hooked between the intermediate second chain gear and the drive gear. In a bicycle configured to be hung, gear cranks M and N for stepping on the petal gear are configured in the shape of crank rods with dogleg-shaped bent portions m and n formed at their base ends, respectively. A bicycle gear crank mechanism characterized by:

【図面の簡単な説明】図は本考案の実施例を示すものであつて、第１
図は側面図、第２図は横断平面図、第３図は本考
案の作用を示すための説明図である。Ｍ，Ｎ……ギヤークランク、ｍ，ｎ……く字状
折曲部。[Brief Description of the Drawings] The drawings show an embodiment of the present invention.
The figure is a side view, FIG. 2 is a cross-sectional plan view, and FIG. 3 is an explanatory view for showing the operation of the present invention. M, N...gear crank, m, n...dog-shaped bent part.

Claims

[Scope of utility model registration request]

By changing the center of the gear crank and bending it, the range of motion applied to the chain gear is expanded, and the loss at the highest and lowest points of pedal depression is halved compared to conventional rotating pedals, making it easier for even people with disabilities to climb hills. This is a bicycle gear crank mechanism that is characterized by the following features: