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Title:
LATCH PULL-BACK DEVICE FOR DOOR LOCK
Document Type and Number:
Japanese Patent JP2004204662
Kind Code:
A
Abstract:

To provide a latch pull-back device for a door lock capable of being built in the other device in addition to the latch pull-back device by rationally disposing each member to effectively use a space in a lock case.

In this latch pull-back device for the door lock, an operating rod provided integrally with a latch and horizontally moved is disposed in an operating rod frame formed at the center in the internal space of the lock case, and the latch pull-back device is built in an upper part or a lower part in the internal space on the basis of the operating rod. The latch pull-back device comprises a latch cam which cooperates with an operating handle shaft and has an engaging part engaged with an engaged part of the operating rod; a cam pressure contact body engaged with the engaged part of the latch cam; and a latch cam spring for energizing the cam pressure contact body. A latch spring is disposed behind the operating rod, and the latch retreats together with the operating rod against the spring force of the latch spring when the latch cam is rotated against the spring force of the latch cam spring by the operating handle shaft.


Inventors:
KINOSHITA TAKUO
Application Number:
JP2003000055245
Publication Date:
July 22, 2004
Filing Date:
March 03, 2003
Export Citation:
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Assignee:
MIWA LOCK KK
International Classes:
E05B55/06; E05B65/06; (IPC1-7): E05B55/06; E05B65/06
Domestic Patent References:
JPH09324569A1997-12-16
JPH0671811U1994-10-07
JP2001323707A2001-11-22
JPH0357737U1991-06-04
JPH09291733A1997-11-11
JPS6449550U1989-03-28
Attorney, Agent or Firm:
三浦 光康