Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
A hinge device connecting an opening-closing member to a lateral edge of a stationary member, the hinge device comprising: two hinge device main bodies disposed at either end of the lateral edge along the longitudinal direction thereof; said hinge device main body comprising; a cam shaft provided at each of the hinge main bodies, affixed to one of the opening-closing member and the stationary member by positioning its axis parallel to the lateral edge, said cam shaft having a cam around the axis periphery; and a spring provided at each of the hinge main bodies, affixed to one of the opening-closing member and the stationary member to which the cam shaft is not affixed, which elastically holds the cam of the cam shaft.
Claim 2
Dependent Claim
38 words
A hinge device according to claim 1, wherein the cam is provided with a pair of holding surfaces which are disposed symmetrically about the axis, at which the cam is held in a predetermined position by the spring.
Claim 3
Dependent Claim
22 words
A hinge device according to claim 2, wherein the holding surfaces are flat surfaces or inwardly depressed surfaces to form concave surfaces.
Claim 4
Dependent Claim
46 words
A hinge device according to one of claims 2 and 3, wherein the edges of the pair of holding surfaces are joined in a state such that they project outward to form a convexity, and a pair of curved surfaces are disposed symmetrically about the axis.
Claim 5
Dependent Claim
49 words
A hinge device according to claim 4, wherein the curved surfaces are provided with reset force receiving surfaces which receive a rotational force by the elastic restorativity of the spring in a direction opposite to the direction of rotation of the cam when it rotates relative to the spring.
Claim 6
Dependent Claim
30 words
A hinge device according to claim 5, wherein the reset force receiving surface is an arced surface having a center line which is eccentric from the axis of the cam.
Claim 7
Dependent Claim
36 words
A hinge device according to one of claims 1 through 6, wherein the two cams which are disposed at either end of the lateral edge differ from each other with respect to their shape in cross-section.
Claim 8
Dependent Claim
47 words
A hinge device according to claim 7, wherein one of the two cams is a holding cam which is principally held in a predetermined position by the spring, while the other cam is a reset cam upon which the elastic restorative force of the spring principally acts.
Claim 9
Dependent Claim
27 words
A hinge device according to one of claims 1 through 8, wherein a through hole which passes through along the axis is formed in the cam shaft.