Crown lock mechanism-installed timepiece

Patent metadata

Field	Value
Publication number	US-10613481-B2
Application number	US-201815914438-A
Country	US
Kind code	B2
Filing date	Mar 7, 2018
Priority date	Mar 13, 2017
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

There is provided a crown lock mechanism-installed timepiece which enables a lock mechanism to regulate an operation of a crown by using a simple operation. A crown lock mechanism includes a winding stem, a crown, a lock screw ring, an extrusion spring, and a regulator. The winding stem is connected to a corrector lever of a movement. The crown is fixed to the winding stem. The crown is capable of engaging with the lock screw ring, and the crown is supported by the lock screw ring so as to be movable in an axial direction. The extrusion spring biases the lock screw spring toward the crown. The regulator regulates the lock screw ring to be located at a predetermined position against a biasing force of the extrusion spring, and holds the crown engaging with the lock screw ring so as to stay at a normal hand operation position.

First claim

What is claimed is:

1. A crown lock mechanism-installed timepiece comprising:
a winding stem that is connected to a corrector lever of a movement;
a crown that is fixed coaxially to the winding stem and movable along an axial direction of the winding stem between a normal hand operation position and a time correction position;
a lock portion configured to engage with the crown and support the crown for movement along the axial direction;
an elastic member that biases the lock portion toward the crown; and
a regulator configured to maintain the lock portion at a predetermined position against a biasing force of the elastic member so that the crown, while being engaged with the lock portion, to stay at the normal hand operation position.

2. The crown lock mechanism-installed timepiece according to claim 1 , wherein a male screw is formed in one of the crown or the lock portion, and a female screw configured to engage with the male screw is formed in the other of the crown or the lock portion.

3. The crown lock mechanism-installed timepiece according to claim 2 , wherein the crown and the lock portion are configured so that the crown and the lock portion are pressed against each other by means of the biasing force of the elastic member when the crown is disposed at the normal hand operation position and disconnected from the lock portion.

4. The crown lock mechanism-installed timepiece according to claim 1 , wherein the biasing force of the elastic member is set to be weaker than a holding force of the corrector lever for holding the crown at the normal hand operation position when the crown and the lock portion are disconnected from each other.

5. The crown lock mechanism-installed timepiece according to claim 1 , wherein the crown and the the lock portion are configured such that when the crown is disposed at the time correction position, the crown is separated from the lock portion.

6. The crown lock mechanism-installed timepiece according to claim 1 , wherein the regulator comprises a pair of groove portions formed along the axial direction, and a pair of ear portions formed as a part of the lock portion, wherein the pair of ear portions are slidably disposed in the pair of groove portions, respectively, and wherein the lock portion is maintained at the predetermined position by the pair of ear portions being into contact with the pair of groove portions.

Assignees

• Seiko Instr Inc

Inventors

• Iguchi Katsunobu

Classifications

• G04B3/046

  Operation by rotation and axial movement with extra function of axial shift of operating element, e.g. crown combined with push button (winding up by push button G04B3/001) · CPC title

• G04B3/041

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

• G04B3/043 Primary

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

• G04B37/04 Primary

  Mounting the clockwork in the case; Shock absorbing mountings · CPC title