Patent ID: 7027294

Claim:
A hinge connecting a first member and a second member in an openable and closable manner to each other, said hinge for electronic equipment comprising: a case body having a rotation arresting means on an outer periphery thereof, inserted into and arrested at one of cylindrical mounting portions of said first member and said second member; a shaft mounted by passing axially through a center portion of said case body with an end portion side thereof being arrested at said case body; a slide key mounted on said shaft in a manner constrained rotation by the shaft and in an axially slidable manner, and having an arresting portion at an end portion thereof; an outer cam having a rotation arresting means on an outer periphery thereof and inserted into and arrested at one of the other cylindrical mounting portions of said first member and said second member, accommodating said slide key inside thereof in axially slidable manner and provided in a manner constrained rotation by said shaft; an inner cam accommodated in an axially slidable manner in said outer cam which passes said slide key together with said shaft axially through the center portion of said outer cam, having an arresting projection which disengages from the arresting portion of said slide key in accordance with a rotation angle; a slider cam provided in confrontation with said inner cam and said outer cam and passing said shaft axially through the center portion thereof, being mounted in an axially slidable manner in said case body in a manner constrained rotation; a first compression spring elastically provided between said slider cam and said case body; a second compression spring elastically provided between said slide key and said outer cam and having less elastic force than that of said first compression spring; and a push-button mounted on said slide key, wherein said outer cam and said inner cam have cam portions in a same direction and said slider cam has a cam portion on the side confronting the cam portions of said outer cam and said inner cam; a convex portion of the cam portion of said slider cam normally engages with the arresting projection of said inner cam of which rotation is blocked by said slide key, whereas, a pressing operation of said push-button disengages the arresting portion of said slide key from the arresting projection of said inner cam so that the cam portion of said slider cam is guided to the cam portion of said outer cam to thereby rotate together with said case body.