| 摘要 |
<p>A portlight is provided with a friction hinge (4) in which a fork-shaped hinge member (14), having a first and a second bosses (21, 22) provided with coaxial holes (23, 24), a knuckle (15) having a first opening (25) facing the hole (23), and a second threaded opening (26) facing the hole (24), a hinge pin (16) having a pin head (27) provided with a centrally threaded bore (29) for a first screw (18) passing through the hole (23), the pin head (27) protruding outside the knuckle (15) from its first opening (25), and a pin rod (28) supported by the knuckle (15) at the second opening (26) thereof, in which a second screw (19) passing through second boss (22) is screwed, and a helical spring (17) surrounding said pin rod (28) and having a first end (30) engaging said pin head (27) and a second end (32) engaging the knuckle (15).</p> |
