| 摘要 |
PROBLEM TO BE SOLVED: To provide a small opening-closing device for expanding an automatic opening-closing angle and a specification width of operation, and not limiting an opening angle to 160°. SOLUTION: This small opening-closing device is composed of a shaft, a cam member 8 installed on this shaft and having a 180°symmetric cam part 10 composed of a projecting part and a recessed part on one end surface rotationally restricted by either one connecting part 3c of a first member or a second member, a slider cam 12 having a 180°symmetric cam part composed of a projecting part and a recessed part on an end surface opposed to the cam part of the cam member installed by being rotationally restricted by either other connecting part 2c, and a compression spring 13 arranged for pressing this spring to the cam member side. One of the respective cam parts arranged on mutual opposed surfaces of the cam member and the slider cam is divided into one positioned on the axis side and one positioned on the outside, and a 180°symmetric cam is respectively arranged by shifting a phase, and the one positioned on at least the axis side and the one positioned on the outside are arranged in 180°symmetry. COPYRIGHT: (C)2004,JPO&NCIPI |
