SPRING RING CLASP, LOBSTER CLASP, AND PRODUCTION METHODS THEREFOR

摘要

The invention provides a spring ring clasp and a lobster clasp that are easy to open and close, wherein the lever is durable and the design of the external appearance thereof is very flexible, and production methods therefor. The spring ring clasp production method: fixes a stock piece (23) prior to molding of the open-close operating part (3) in a pressing device (21) that is configured to press the stock piece (23) interposed between multiple molds (22, 22); presses the stock piece (23) using the respective molds (22, 22); and molds the pressing surface (9b) of the lever (9) that the user will contact with a finger, etc. and the neck part (9a), which connects the pressing surface (9b) to the sliding part (8) and is narrower than the pressing surface (9b).