Portable apparatus and portable timepiece having a push button

Details Portable apparatus and portable timepiece having a push button Portable apparatus and portable timepiece having a push button

2008-07-30

2010-06-29

Nguyen, Truc T (Department: 2833)

Horology: time measuring systems or devices

Cases

With protection means

C200S302200, C368S308000

Reexamination Certificate

active

07744272

ABSTRACT:
A portable apparatus has a push button mounted on a casing for operating a contact inside the casing. The push button is axially slidable in a pipe fixed in a through-hole extending through the casing. A coil spring encircles the pipe and is interposed between a flange of the pipe and a head of the push button to urge the push button outwardly. A packing ring for sealing the space between the pipe and push button is attached to either the pipe or the push button in the region where the coil spring encircles the pipe. Since the coil spring overlaps the packing ring, the axial length of the pipe and push button can be shortened to reduce the size of the casing.

REFERENCES:
patent: 5663934 (1997-09-01), Wenger et al.
patent: 5751668 (1998-05-01), Eray
patent: 6872899 (2005-03-01), Oshio et al.
patent: 2007/0074545 (2007-04-01), Hiranuma et al.

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