Patent ID: 7503721
Filing Date: 2009-03-17
Classification: G09F,Y10T

Abstract:
1. A coupling mechanism, comprising: a column-shaped plug having an engagement groove formed on an outer circumference thereof; a cylindrical socket adapted so as to be movable to and from the plug in an axial direction thereof and formed so as to be engageable with the plug; at least one slip-proof member attached to the socket and formed so as to be engageable in the engagement groove of the plug; a sliding cylinder fitted around the socket so as to be slidable in the axial direction of the plug and formed so as to push the slip-proof member into the engagement groove of the plug; a first spring member for urging the sliding cylinder in a direction to push the slip-proof member into the engagement groove of the plug; a cam mechanism equipped with a cam so that a rotation of the cam allows the sliding cylinder to move in opposition to urging of the first spring member thereby canceling an engagement between the slip-proof member and the engagement groove; and a second spring member for urging the cam to a position where the engagement between the slip-proof member and the engagement groove is maintained.