Water resistant watch

Patent metadata

Field	Value
Publication number	US-11360436-B2
Application number	US-202017131853-A
Country	US
Kind code	B2
Filing date	Dec 23, 2020
Priority date	Dec 26, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A watch includes: a crown including a head portion and a shaft portion; a stem pipe including a first surface that includes an insertion hole through which the shaft portion is inserted and has a distance from a surface of the shaft portion as a first distance in cross-sectional view, and a second surface that is provided at a position closer to an end portion of the insertion hole than the first surface and has a distance from the surface of the shaft portion as a second distance larger than the first distance; a packing disposed between the surface of the shaft portion and the first surface; and a metal ring that is disposed between the surface of the shaft portion and the second surface and is in contact with the packing.

First claim

What is claimed is:

1. A watch comprising:
a crown including a head and a shaft;
a stem pipe including an insertion hole having a first diameter through which the shaft is inserted, a first surface having a second diameter larger than the first diameter of the insertion hole and having a distance from a surface of the shaft as a first distance in cross-sectional view, and a second surface provided at a position closer to an end of the insertion hole than the first surface and having a distance from the surface of the shaft as a second distance larger than the first distance;
a packing disposed between the surface of the shaft and the first surface; and
a metal ring that is disposed between the surface of the shaft and the second surface and faces the packing, the metal ring being fixed to the stem pipe.

2. The watch according to claim 1 , wherein
a thickness of the packing is larger than the first distance.

3. The watch according to claim 1 , wherein
the stem pipe has a third surface that faces the metal ring with the packing interposed therebetween in cross-sectional view, and
a distance between the third surface and the metal ring is larger than a thickness of the packing.

4. The watch according to of claim 1 , wherein
the metal ring has a ring shape and has an inner surface facing the packing and an outer surface facing the head of the crown, and
a diameter of an opening of the metal ring through which the shaft of the crown is inserted is a third diameter on an inner surface thereof, and is larger than a diameter on an outer surface thereof.

5. The watch according to claim 4 , wherein
the third diameter of the opening of the metal ring is larger than the first diameter of the insertion hole in the stem pipe.

6. The watch according to claim 1 , wherein
the metal ring is fixed to the stem pipe by caulking or welding at an end portion of the stem pipe on a side of the head of the crown.

Assignees

• Seiko Epson Corp

Inventors

• Hayashi Koki
• Naito Yoshihiro

Classifications

• G04B37/103 Primary

  by screwing the crown onto the case · CPC title

• G04B37/106 Primary

  of push buttons (winding up by push button G04B3/001; crown in the form of push button G04B3/046; construction of push buttons G04B3/048) · CPC title

• G04B3/041

  Construction of crowns for rotating movement; connection with the winding stem; winding stems · CPC title

• G04B3/043

  Locking of the operating element, also by mounting in a concealed place · CPC title