Finger ring

Abstract

Arcuate pivotally movable members and an arcuate slidable member are assembled so that guide pins provided in the arcuate pivotally movable members are inserted into the guide groove formed in the arcuate slidable member. The arcuate pivotally movable members and the arcuate bearing member are assembled by pivotal pins so that the arcuate pivotally movable members can pivotally move around the pivotal pins in directions to enlarge an inner size of the finger ring. The arcuate bearing member has a leaf spring provided therein so that the leaf spring has one end pressed against an inner side of a projection projecting from a first end of one of the arcuate pivotally movable members and located ahead of the pivotal pin in the one arcuate pivotally movable member, and the leaf spring has the other end pressed against an inner side of a projection projecting from a first end of the other arcuate pivotally movable member and located ahead of the pivotal pin in the other arcuate pivotally movable member.

Description

[0001] The present application claims a priority under 35 U.S.C. .sctn.119 to Japanese Patent Application No. 2001-166507, filed on Jun. 1, 2001 and entitled "FINGER RING". The contents of the application are incorporated herein by reference in their entirety.[0002] 1. FIELD OF THE INVENTION[0003] The present invention relates to a finger ring having a function to be able to elastically expand the inner size thereof.[0004] 2. DISCUSSION OF BACKGROUND[0005] As a finger ring configured to be able to expand the inner size thereof, there has been proposed a finger ring having a disconnected portion formed therein, as in the finger ring disclosed in JP-A-8-182519.[0006] There has been also proposed a finger ring configured to form an annular member with an expansion coil provided between both edges of a chain, as in the finger ring disclosed in JP-A-9-238720.[0007] Although the former type can provide a one-size-fits-all finger ring, the provision of the disconnected portion prevents a f...

AI Technical Summary

Benefits of technology

[0020] In that manner, the finger ring according to the first aspect can perform a function required to provide a one-size-fits-all finger ring since the finger ring can enlarge the inner size thereof in the certain range without losing an annular shape as a finger ring.

[0021] As stated earlier, the finger ring can carries out the enlargement of the inner size in elastic fashion. The finger ring has an advantage in that after having passed over a knuckle of a finger by the elastic enlargement, the inner size can be reduced to a size to fit the base of the finger by elastic return so as to properly put the finger ring on a wearing portion of the finger.

[0022] In the finger ring, the function to elastically enlarge the inner size of the finger ring is ensured by the leaf spring, which has both ends pressed against the first ends of the arcuate pivotally movable members. Even when the elastic force of the leaf spring is not set at a great value, the arcuate pivotally movable members that have been pivotally moved in the directions to enlarge the inner size of the finger ring can ensure a great extent of movement in directions toward the inside of the finger ring by the elastic force on the side of the second ends. As a result, the finger ring can prevent the wearing portion from being tightened more greatly than needed, while performing the function to elastically enlarge the inner size of the finger ring. Thus, the finger ring can constantly keep a feeling of wearing comfortable.

[0024] By this arrangement, when the finger ring is in a basic state wherein the arcuate pivotally movable members are not pivotally moved in the directions to enlarge the inner size of the finger ring, the arcuate pivotally movable members can be prevented from being pivotally moved in the directions to enlarge the inner size of the finger ring, while keeping an annular shape as a finger ring in stable fashion in the basic state.

[0025] In accordance with the finger ring of the present invention, the finger ring can be properly fitted to a finger, keeping an annular shape.

Problems solved by technology

Although the former type can provide a one-size-fits-all finger ring, the provision of the disconnected portion prevents a finger ring from being continuous.

When an attempt is made to increase the elastic return force of the expansion spring in order to fit the finger ring to a finger, there is a tendency to put the finger ring to the finger too tightly.

When an attempt is made to prevent the finger ring from being fastened to the finger too tightly, there is a tendency to make a feeling of wearing lesser comfortable.

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