The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2013
Filed:
Jan. 22, 2008
Koji Takagi, Chuo-ku, JP;
Koji Takagi, Chuo-ku, JP;
Nichibei Co., Ltd., Tokyo, JP;
Abstract
There is provided a blind operating device for transmitting a rotation in both directions from an operation portion to a driving axis of the blind capable of making a diameter of a clutch spring smaller, and then capable of reducing operation load without breaking the clutch spring. The blind operating device includes an input shaft into which a rotation from a pulley is inputted, and a rotation axis that is provided coaxially with the input axis and is capable of transmitting the rotation to the driving axis. A clutch spring is wound around a fixed spring winding axis of a case and a rotation spring winding axis of the rotation axis. Linking and de-linking of the rotation axis and the case is made possible utilizing tightening and loosening of the clutch spring and one end of the clutch spring is linked to the rotation axis. When the rotation in one direction is inputted to the input axis, a part of the clutch spring wound around the fixed spring winding axis loosens starting from a rotation spring winding axis side, whereby the rotation axis is allowed to rotate with the input axis.