Retaining spring for a wristwatch case
AssigneeCitizen Watch Co., Ltd.
InventorsHidetaka Tutiya, Masahiko Waki
Life of this patent
Estimating the term…
Abstract
A retaining spring for fixedly retaining a case band and a back cover of a wristwatch case, which retaining spring comprises a fixing portion secured to one of the case band and the back cover, a weakened or torsionable portion extending from the fixing portion, and an engaging portion connected to the fixing portion through the weakened or torsionable portion and engaging with the other one of said case band and said back cover.
Claims12
A wristwatch case comprising:
- a case band;
- a back cover disposed in said case band;
- a watch glass held in place by said case band and said back cover;
- and
- a retaining spring disposed between said case band and said back cover for fixedly retaining said case band an said back cover relative to each other;
- said retaining spring comprising an engaging portion engaging with both of said case band and said back cover to fixedly retain said case band and said back cover relative to one another, first and second torsionable portions horizontally extending from both ends of said engaging portion and first and second fixing portions integrally connected to said first and second torsionable portions, respectively;
- said first and second fixing portions being fixedly retained in one of said case band and said back cover, said first and second torsionable portions including weakened portions serving as springs, respectively, and said first and second fixing portions being aligned on the same horizontal plane as said engaging portion, to allow rotation of said engaging portion at a predetermined angle relative to the plane of each of said first and second fixing portions, whereby said engaging portion is movable to a position to allow removal of said case band and said back cover relative to each other.
A retaining spring for fixedly retaining a case band and back cover having a fitting groove and a retaining recess with respect to each other, comprising:
- a fixing portion secured to said retaining recess of said back cover;
- first and second torsionable portions horizontally extending from both ends of said fixing portion;
- and
- first and second engaging portions integrally connected to said first and second torsionable portions, respectively;
- said fixing portion being fixedly retained in said back cover, said first and second torsionable portions including weakened portions serving as springs, respectively, and said fixing portion being aligned on the same horizontal plane as said engaging portions, to allow rotation of said engaging portion at a predetermined angle relative to the plane of said fixing portion, whereby said engaging portion is movable to a position to allow removal of said case band and said back cover relative to each other.
Dependencies are inferred from the claim text.