Door lock engagement and disengagement shifting fork device

Abstract

The invention relates to a door lock engagement and disengagement shifting fork device, wherein a front drive shifting block and a front shifting arm are arranged on the outer circumference of a frontshifting fork; a rear drive shifting block and a rear shifting arm are arranged on the outer circumference of a rear shifting fork; front and rear sides of a middle shifting fork are respectively provided with front and rear arc chutes; the front drive shifting block extends into the front arc chute, and the rear drive shifting block extends into the rear arc chute; the middle shifting fork is provided with a engagement and disengagement groove that disconnects the front arc chute from the rear arc chute; when a engagement and disengagement block enters the engagement and disengagement grooveand is blocked from the front drive shifting block and the rear drive shifting block, the front drive shifting block also has a sliding space between the front arc chute; and the rear drive shiftingblock also has a sliding space between the rear arc chute. When the rear shifting fork and the middle shifting fork are controlled to rotate and unlock by an indoor handle, the rear shifting fork andthe middle shifting fork can rotate relative to the front shifting fork to work; the indoor handle is prevented from being in linkage with the outdoor handle when the door is opened in the door, so that a user can unlock through the indoor handle of under the condition that the outdoor handle is blocked and cannot rotate; and product safety is thereby improved.

Description

technical field [0001] The invention relates to an electronic door lock, in particular to a clutch shift fork device of the door lock. Background technique [0002] Chinese Patent No. ZL201720797774.0 disclosed an electronic lock clutch shift fork assembly on January 19, 2018. Since its left and right shift forks have built-in independent return springs to reset the left and right shift forks respectively, it prevents the shift forks from The components are misaligned to ensure that the square holes of the left and right shift forks are parallel and vertically concentric with the square holes of the middle shift fork, so that the motor clutch in the lock body can push the pins in the shift fork assembly to enter accurately after each power-on In the concentric hole of the shift fork assembly, the left and right shift forks can be hung on both sides of the shift fork pin, so that the situation that idling occurs when the handle is pressed down and the door cannot be opened do...

AI Technical Summary

Problems solved by technology

In this structure, after the pin enters the shift fork assembly, the left, middle and right shift forks are relatively fixed together, so the three are linked together, so when the handle outside the door and inside the door is rotated to open the door, the other handle also rotates accordingly. As a result, if the resident goes out from the door, if the outside handle is blocked, the door cannot be opened, which poses a safety hazard

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