Title:
DRIVE ASSIST DEVICE AND GENERATOR THAT APPLIES SAME
Document Type and Number:
WIPO Patent Application WO/2019/130512
Kind Code:
A1
Abstract:
Provided is a compact drive assist device that is simple in structure, has a small number of components, and is capable of assisting the drive force to a sufficient degree at low cost. This drive assist device for bicycles utilizes the moment of force from a roller 12a of a variable mechanism 9a, which is fitted into a strained-circular annular guide groove 11a of a guide member 10a, the roller 12a moving along a wall by means of the pedaling of a pedal 7a. The variable mechanism 9a telescopes in response to the movement of the roller 12a so that the distance between the shaft center of a support shaft 8 in a land portion L and the shaft center of the pedal 7a is longer at the blunt end (the upper portion being smaller in roundness than the lower portion) of the groove 11a where the groove 11a bulges and shorter at the sharp end of the groove 11a where the groove 11a contracts. As a result, the movement of the roller 12a can be made faster at the blunt end of the groove 11a, slower at the lower portion than at the upper portion, and slower by causing the movement to have no load at the sharp end, thereby reducing the burden on the foot that pedals the pedal 7a and performing drive assist. Functioning in a similar manner are a roller 12b of a variable mechanism 9b and a pedal 7b vis-à-vis an annular groove guide 11b on a hidden guide member 10b on the other side.
Inventors:
AKUTSU YOSHINOBU (JP)
Application Number:
PCT/JP2017/047078
Publication Date:
July 04, 2019
Filing Date:
December 27, 2017
Export Citation:
Assignee:
AKUTSU YOSHINOBU (JP)
International Classes:
B62M3/00
Foreign References:
| JP2001071981A | 2001-03-21 | |||
| JP2004350402A | 2004-12-09 | |||
| JPH0754829A | 1995-02-28 | |||
| JP2002505630A | 2002-02-19 | |||
| JPH05155375A | 1993-06-22 | |||
| JP2006064175A | 2006-03-09 | |||
| JP2007024025A | 2007-02-01 |
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Download PDF: