ELASTIC HINGE OF THE SPECTACLE FRAME AND MANUFACTURING METHOD THEREOF

Title:

ELASTIC HINGE OF THE SPECTACLE FRAME AND MANUFACTURING METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2005/024495

Kind Code:

A1

Abstract:

The invention relates to an elastic hinge of the spectacle frame and a manufacturing method thereof. The elastic hinge at least comprises an axle that is in turn sleeved by a locating block, an elastic means and a lirait stop. The elastic force of the elastic hinge between the spectacle frame can be opened and closed easily with respect to the spectacle leg and the locating block ensures the stability of the movement above. The manufacturing method thereof at least includes the steps as follow: fabricating the basic form of the axle from metallic sheet material; pursing up the rear end of the axle into a cylinder with an appropriate diameter; processing the foreside of the axle to obtain a hole of the hinge. The surface of the processed axle has no vestige of the die stamping and has a high fineness. And the surface of the axle after processing has a homogeneous density of the metallic molecule and has no stress concentration, which adds the rigidity of the axle and insures the stability. The length of the axle can be controlled as desired.

Inventors:

HUANG CHEN CAI (CN)

Application Number:

PCT/CN2004/000071

Publication Date:

March 17, 2005

Filing Date:

January 19, 2004

Export Citation:

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Assignee:

HUANG CHEN CAI (CN)

International Classes:

G02C5/22; (IPC1-7): G02C5/22

Domestic Patent References:

WO2001079917A1

2001-10-25

Foreign References:

CN1165966A	1997-11-26
EP0378969A1	1990-07-25
FR2725046A1	1996-03-29

Other References: