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:
Jun. 26, 2001
Filed:
Jun. 09, 1999
Yutaka Kamijo, Saitama, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A rotary encoder,comprises a rotary shaft,supported for rotation about its axis AX and a disk,made of an insulating substrate with a conductive pattern,formed on a side surface thereof. The rotary shaft,has a pair of axially-extending, threaded holes,and,formed therein at its one end. The desk,is fixedly secured to the rotary shaft,by means of a pair of set screws,and,threadably engaged into the threaded holes,and,formed in the rotary shaft,such that the disk,is rotatable about a rotational center defined by the axis AX of the rotary shaft,A plurality of electrical contacts,are fixedly mounted on a circuit board,and so arranged as to be in contact with the conductive pattern,depending on the angular position of the disk,such that various combinations of the electrical contacts,may be electrically interconnected one another depending on the angular position of the disk,The threaded holes,and,and the set screws,and,are located off-center with respect to the rotational center of the disk,and along a circle centered to the rotational center of the disk,The conductive pattern,has a central portion,covering the region of the rotational center of the disk,The electrical contacts,include a centered electrical contact,so arranged as to be in contact with the conductive pattern,substantially at the rotational center of the disk,By virtue of the above, the overall size of the rotary encoder,may be minimized while the disk,may be safely secured to the rotary shaft,with reduced possibility of loosening during use.