Auto-unlocking device for mortise lock

Abstract

The invention discloses an automatic unlocking device for core inserting door locks, comprising a lock shell 1, as well as an oblique lock tongue 2 and an inner knob 4 which are held inside the lock shell 1. An unlocking mechanism is also arranged inside the lock shell 1; one end of the unlocking mechanism is in drive connection with a bottom end face 21 of the oblique lock tongue 2; the other end of the unlocking mechanism is in drive connection with the inner knob 4. At the instant of closing a door, in the process that the oblique lock tongue 2 touches a door frame and retracts to the inside of the lock shell 1, the bottom end face 21 of the oblique lock tongue 2 transmits the retracting force to the unlocking mechanism, and the unlocking mechanism converts the force into the rotatingforce of the inner knob 4, which ensures that the inner knob 4 rotates to a unlocking state and cancel the locked state of a handle, so as to achieve the effect of unlocking automatically at the instant of closing the door. Meanwhile, the oblique lock tongue 2 cannot cause the hard collision with the door frame in the process of closing the door so as to damage the door frame and the lock tongue as the inner knob 4 is locked by mistake. The automatic unlocking device has the advantages of simple and stable structure, and the capability of applying to automatic unlocking devices of various core inserting door locks.

Description

technical field [0001] The invention relates to an automatic unlocking device for a mortise door lock. Background technique [0002] At present, the mortise door lock usually adopts the turning handle to retract the oblique bolt to unlock, and the door inner knob is usually set, and the handle can not be rotated outside the door to open the door by the rotation of the locking handle. like Figure 7 As shown, by turning the handle turning block 15, the handle turning block 15 drives the oblique tongue to pull and insert 14 to rotate to make the oblique bolt 2 retract, thereby achieving the effect of unlocking. When the inner knob 4 is turned, the safety dial 3 is set to Figure 8 In the shown position, lock the oblique tongue dial 14 through the safety dial 3 card, so as to achieve the purpose of locking the handle to rotate and unlock, and locking the door in the room. This type of mortise door lock is generally used on interior doors, and its defect is: when it is not loc...

AI Technical Summary

Problems solved by technology

This type of mortise door lock is generally used on interior doors, and its defect is: when it is not locked, if the inner knob 4 is turned to the Figure 8 In the position shown, if the user closes the door outside the room without knowing it, the handle will be locked, that is, the handle cannot be unlocked by turning the handle, and the person will be locked out of the door by mistake

But oblique deadbolt 2 also can occur and doorframe hard collision and cause the damage of deadbolt and doorframe

Images