Mechanism for connecting ornamental parts of wrist watch
AssigneeKabushiki Kaisha Hattori Seiko
InventorsAkio Yamamoto, Taro Tanaka, Haruyuki Shimayama, Shunichi Kojima, Noboru Hosokawa
Life of this patent
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Abstract
A mechanism for connecting ornamental parts of wrist watches that permit easily connecting and disconnecting ornamental parts without using any special tool and without marring the appearance of wrist watches. A stepped pin is inserted in a larger-diameter bore of a cocoon-shaped ring fitted in an end piece and a bore in a watch casing. Then, a smaller-diameter part of the stepped pin is moved into a smaller-diameter bore by pulling the watch casing and a band longitudinally. With the stepped pin thus securely held in place, the watch casing and band are firmly connected.
Claims22
A mechanism for connecting ornamental parts of a wrist watch comprising:
- a stepped pin having at least two larger-diameter parts at opposed ends thereof and a smaller-diameter part between said larger-diameter parts to connect together the ornamental parts of the wrist watch;
- and
- a tubular ring that is cocoon-shaped in cross-section, adapted to be disposed within at least one of the ornamental parts and parallel to the width of the ornamental part, and having a constricted part that resiliently alters the shape to allow the smaller-diameter part of the stepped pin to pass there through, a larger-diameter bore to admit the larger-diameter parts of the stepped pin provided on one side of the constricted part, and a smaller-diameter bore that is provided on the other side of the constricted part for holding the stepped pin parallel to the width of the ornamental part.
A structure for connecting ornamental parts of a wrist watch comprising:
- a stepped pin for connecting together the ornamental parts of the wrist watch, the stepped pin having two ends, at least one smaller-diameter portion along its length, and larger-diameter parts formed at each end of the stepped pin, the smaller-diameter portion being disposed between said larger-diameter parts;
- and
- tubular means having a cocoon-shape in cross-section adapted to be disposed within at least one of the ornamental parts to admit and hold the stepped pin, said means having a constricted part that allows the passage of the smaller-diameter portion of said stepped pin by resiliently altering the shape thereof, a first bore admitting said stepped pin provided on one side of the constricted part, and a second bore on another side of the constricted part admitting said smaller-diameter portion and restricting axial motion of the stepped pin parallel to the width of the ornamental part by coming into contact with each of said larger-diameter parts.
A structure for connecting ornamental parts of a wrist watch comprising a stepped pin for connecting together the ornamental parts of the wrist watch, the stepped pin having two ends, at least one smaller-diameter portion along its length, and larger-diameter parts formed at each end of the stepped pin, the smaller-diameter portion being disposed between said larger-diameter parts;
- means having a cocoon-shape in cross-section adapted to be disposed within at least one of the ornamental parts to admit and hold the stepped pin, said means having a constricted part that allows the passage of the smaller-diameter portion of said stepped pin by resiliently altering the shape thereof, a first bore admitting said stepped pin provided on one side of the constricted part, and a second bore on another side of the constricted part admitting said smaller-diameter portion and restricting axial motion of the stepped pin parallel to the width of the ornamental part by coming into contact with each of said larger-diameter parts, said means including a tubular ring made of an elastic sheet and having a cocoon-shaped cross-section, the ring including said first bore, said first bore admitting the larger-diameter parts of said stepped pin and the second bore, the second bore having a length smaller than the length of the smaller-diameter portion of said stepped pin and a diameter large enough to permit the admission thereof.
Dependencies are inferred from the claim text.