US 6,079,474 AGranted

Sun-shade assembly

OwnerYung-Ching Lininventor

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Abstract

A sun-shade assembly includes a stationary curved shaft, a tubular roller, a screen, and a torsion spring. The roller is made of a resilient material, and is sleeved rotatably around the shaft. The roller has a curvature conforming with that of the shaft. The screen is wound around the roller, and has a lower edge connected to the roller and an upper edge provided with a stretch rod which has a curvature conforming with that of the shaft. The torsion spring has a first end secured to the roller, and an opposite second end secured to the shaft. The screen is unwound from the roller when the stretch rod is pulled away from the roller, thereby resulting in rotation of the roller about the shaft in a first direction against biasing force of the torsion spring. The torsion spring biases the roller to rotate about the shaft in a second direction opposite to the first direction to result in winding of the screen onto the roller.

Claims10

Dependent claims

A sun-shade assembly comprising:

a stationary curved shaft;
a tubular roller made of a resilient material, said roller being sleeved rotatably around said shaft, and having a curvature conforming with that of said shaft;
a screen wound around said roller, said screen having a lower edge connected to said roller and an upper edge provided with a stretch rod which has a curvature conforming with that of said shaft;
a torsion spring having a first end secured to said roller, and an opposite second end secured to said shaft;
said screen being unwound from said roller when said stretch rod is pulled away from said roller, thereby resulting in rotation of said roller about said shaft in a first direction against biasing force of said torsion spring, said torsion spring biasing said roller to rotate about said shaft in a second direction opposite to the first direction to result in winding of said screen onto said roller;
and
a retaining sleeve which is sleeved rotatable on said shaft and which extends into said roller, said retaining sleeve being mounted on said roller so as to be co-rotatable therewith, said retaining sleeve having an outer wall surface formed with a retaining groove, said first end of said torsion spring being received in said retaining groove for connecting securely to said retaining sleeve, said retaining groove including a circumferentially extending groove portion and an axially extending groove portion extending from said circumferential grove portion, said first end of said torsion spring including a ring section received in said circumferential groove portion, and a linear section which extends from said ring section and which is received in said axially extending groove portion.

4 more elements

Dependencies are inferred from the claim text.