| US 7,506,608 B2 | ||
| Hinge mechanism | ||
| Hitoshi Sato, Tokyo (Japan); Yasuhiro Mitsui, Abiko (Japan); Minoru Ohiraki, Chiba (Japan); and Sakae Higano, Saitama (Japan) | ||
| Assigned to Mitsubishi Steel Mfg. Co., Ltd., Tokyo (Japan) | ||
| Appl. No. 10/542,667 PCT Filed Oct. 12, 2004, PCT No. PCT/JP2004/015341 § 371(c)(1), (2), (4) Date Jul. 18, 2005, PCT Pub. No. WO2005/040623, PCT Pub. Date May 06, 2005. |
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| Claims priority of application No. 2003-367579 (JP), filed on Oct. 28, 2003. | ||
| Prior Publication US 2006/0064850 A1, Mar. 30, 2006 | ||
| Int. Cl. E05D 11/10 (2006.01) | ||
| U.S. Cl. 116—330 [16/303] | 3 Claims |
| 1. A hinge mechanism in a hinge which causes a first member and a second member to have free rotational movement or opening
and closing movement and exerts a first stress between the first member and the second member at a rotational start point
of a movement range and a second stress between the first member and the second member at a rotational end point of the movement
range, the hinge mechanism comprising:
a shaft;
a spring; and
two cam sets having the shaft inserted therethrough and having different phases from each other, each cam set having a cam
structure comprising a protrusion provided in one member of the cam set and a recess provided in the other member of the cam
set in which the protrusion and the recess of each cam set engage with each other only once as the cam set rotates through
360°,
wherein the spring biases the two cam sets, and
one of the two cam sets applies the first stress at the rotational start point by the spring bias and the other of the two
cam sets applies the second stress at the rotational end point by the spring bias.
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