| 摘要 |
<p>A support consists of two nasal pads (40, 41) with a gap between them that varies with the pressure applied. Each pad is connected by a pivoted arm (42, 43) to a transverse flexible bar (44), with the pads, arms and bar all made in one piece from a thermoplastic material. The support consists of two nasal pads (40, 41) with a gap between them that varies with the pressure applied. Each pad is connected by a pivoted arm (42, 43) to a transverse flexible bar (44), with the pads, arms and bar all made in one piece from a thermoplastic material. The pivots are in the form of pegs (35, 36) projecting from the spectacle frame that engage with holes (50, 51) located between the arms and flexible bar with a stiffness of the order of 20 N/m, allowing the pads to move by about 5 mm with an effort of some 10 grams.</p> |
