Patent ID: 8371627

Claim:
A latch-bolt mechanism comprising: a housing; a latch-bolt movable relative to said housing between an extended position and a retracted position and including a bolt body that is disposed movably on said housing, an engaging member that is operable to move on said bolt body between an engagement position and a disengagement position and that has an engaging portion, and a coupling device that connects said bolt body to said engagement member; and a driving device including a first drive member disposed in said housing and having a first driving portion, said first driving portion of said first drive member being activated to contact and push said engaging portion of said engaging member so as to move said latch-bolt from the extended position to the retracted position when said engaging member is disposed at the engagement position, contact between said first driving portion of said first drive member and said engaging portion of said engaging member being prevented when said engaging member is disposed at the disengagement position; wherein: said bolt body includes a plate body disposed in said housing; said coupling device includes first, second, and third coupling members, and a pushing member that is disposed movably on said plate body, that is in contact with said engaging member, and that is activatable to allow for movement of said engaging member between the engagement position and the disengagement position, said pushing member cooperating with said first, second, and third coupling members to connect said bolt body to said engagement member, said second coupling member being formed with a slot, said pushing member being disposed on said slot of said second coupling member; and wherein said driving device further includes: a first mounting member disposed in said housing and permitting said first drive member to be disposed thereon; a second mounting member disposed in said housing; a second drive member disposed between said first and second mounting members such that said first mounting member is disposed between said first and second drive members; a third drive member disposed on said second mounting member such that said second mounting member is disposed between said second and third drive members; a first driving rod extending through either said first or third drive member for driving synchronous rotation of said first and third drive members; and a second driving rod extending through said second drive member for driving rotation of said second drive member.