Key cylinder device

Patent metadata

Field	Value
Publication number	US-9816290-B2
Application number	US-201615157010-A
Country	US
Kind code	B2
Filing date	May 17, 2016
Priority date	May 29, 2015
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A key cylinder device includes a cylindrical rotor case, a rotor rotatably enclosed in the rotor case, a sleeve fixedly disposed between the rotor and the rotor case, and a tumbler moving in a radial direction inside the rotor by insertion and extraction of a mechanical key into and from the rotor. The sleeve includes a hole not engaged with the tumbler by the insertion of the mechanical key and engaged by the extraction of the mechanical key, and a dividing wall formed at a middle of the hole, the dividing wall receiving the tumbler. A part of the dividing wall is engaged with a recessed groove formed on an inner peripheral surface of the rotor case.

First claim

What is claimed is:

1. A key cylinder device, comprising:
a cylindrical rotor case;
a rotor rotatably enclosed in the rotor case;
a sleeve fixedly disposed between the rotor and the rotor case; and
a tumbler moving in a radial direction inside the rotor by insertion and extraction of a mechanical key into and from the rotor,
wherein the sleeve comprises a hole not engaged with the tumbler by the insertion of the mechanical key and engaged by the extraction of the mechanical key, and a dividing wall formed at a middle of the hole, the dividing wall receiving the tumbler, and
wherein the sleeve is formed separately from the rotor case and non-rotatably mounted therein by a part of the dividing wall being inserted into and fixed in a recessed groove formed on an inner peripheral surface of the rotor case along a direction of a rotor rotation axis thereby locking the sleeve so as to rotate with the rotor case.

2. The key cylinder device according to claim 1 , wherein the dividing wall comprises a first dividing wall portion receiving the tumbler and a second dividing wall portion engage with the recessed groove.

3. The key cylinder device according to claim 1 , wherein the dividing wall and the recessed groove define an illegal rotation preventing portion that prevents the sleeve from moving beyond a predetermined position and from rotating together with the rotor.

4. The key cylinder device according to claim 1 , wherein the part of the dividing wall is formed over an entire length of the hole in a longitudinal direction of the sleeve.

5. The key cylinder device according to claim 1 , wherein the part of the dividing wall is formed over an entire length of the sleeve in a longitudinal direction of the sleeve.

Assignees

• Tokai Rika Co Ltd

Inventors

• Yamaguchi Toshiaki

Classifications

• E05B29/00 Primary

  Cylinder locks {and other locks} with plate tumblers which are set by pushing the key in {(fastening of cylinders, rotors, plugs or cores E05B9/084; with magnetic tumblers E05B47/0044; with electromagnetic control E05B47/0611)} · CPC title

• E05B85/06

  Lock cylinder arrangements · CPC title

• E05B77/44

  Burglar prevention, e.g. protecting against opening by unauthorised tools (E05B77/28 takes precedence) · CPC title

• E05B9/04

  Casings} of cylinder locks {(details specific for pin or ball tumbler cylinder locks E05B27/0014; details specific for plate tumbler cylinder locks E05B29/00) · CPC title

• B60R25/02

  operating on the steering mechanism · CPC title