Watch and crown used in this watch
First Claim
1. A watch comprising:
- a barrel;
a stem pipe disposed outside said barrel and having a barrel outside protruding portion provided with an external thread; and
a crown having a crown shaft and a crown ring connected to said crown shaft, the crown ring having an internal thread removably threaded to said external thread, said crown shaft having a barrel insertion cylindrical portion inserted in said stem pipe and a ring connection portion integral with the cylindrical portion, the ring connection portion being threadedly connected to said internal thread at one end portion of said crown ring, the barrel insertion cylindrical portion being smaller in diameter than said crown ring.
1 Assignment
0 Petitions
Accused Products
Abstract
A watch is offered in which the life of the threadedly engaged portion between the stem pipe and the crown can be improved and which has an internal thread capable of being machined relative to the crown easily and accurately. The watch is based on a watch in which the crown is threadedly locked to a stem pipe mounted to a barrel. The stem pipe has a barrel outside protruding portion provided with an external thread. The crown has a crown shaft and a crown ring having an internal thread removably threaded to the external thread, the ring being connected to the crown shaft. The crown shaft has a barrel insertion cylindrical portion which is smaller in diameter than the crown ring and inserted in the stem pipe and a ring connection portion mounted integrally with this cylindrical portion and connected to one end portion of the crown ring.
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Citations
16 Claims
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1. A watch comprising:
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a barrel; a stem pipe disposed outside said barrel and having a barrel outside protruding portion provided with an external thread; and a crown having a crown shaft and a crown ring connected to said crown shaft, the crown ring having an internal thread removably threaded to said external thread, said crown shaft having a barrel insertion cylindrical portion inserted in said stem pipe and a ring connection portion integral with the cylindrical portion, the ring connection portion being threadedly connected to said internal thread at one end portion of said crown ring, the barrel insertion cylindrical portion being smaller in diameter than said crown ring. - View Dependent Claims (2, 3, 4, 5)
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6. A crown for a watch, comprising:
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a crown shaft; and a crown ring having an internal thread in its inner surface for threaded connection to a stem pipe of a watch; said crown shaft having a barrel insertion cylindrical portion of a diameter smaller than that of said crown ring and a ring connection portion integral with said barrel insertion cylindrical portion and threadedly connected to the internal thread of said crown ring. - View Dependent Claims (7)
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8. A watch comprising:
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a watch case having a pipe installation hole extending therethrough; a stem pipe having an insertion portion inserted into the pipe installation hole and fixed to the watch case and a protruding portion connected to the insertion portion and protruding outside the watch case, the protruding portion having an external thread; and a crown comprised of a crown shaft and a crown ring, the crown shaft being axially displaceable and rotatable in the insertion portion of the stem pipe and having an inner end portion slidably attached to a watch stem and an outer end portion disposed outside the watch case, and the crown ring being disposed circumferentially around and threadedly connected to the outer end portion of the crown shaft and having an internal thread threadedly engageable with the external thread of the stem pipe protruding portion in response to rotation of the crown ring in one direction to axially displace the crown ring inwardly into abutment with the watch case thereby locking the crown against inadvertent rotation and disengageable from the external thread in response to rotation of the crown ring in the opposite direction to permit the crown to be pulled outwardly and rotated to change a function of the watch. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification