Lock mechanism

Abstract

This invention relates to a lock structure, including an inner handle, an unlocking cam, an inner disc, a pivot, a pressure rod, and an unlocking roller. The inner handle passes through an inner sleeve. The unlocking cam is attached to the inner handle. The inner disc is attached to the inner handle and has a plate, wherein the plate extends with a bent portion. The pivot is linked to the inner disc and the outer disc of the outer handle, and the pivot drives the latch assembly. The pressure rod is movably inserted through the inner sleeve to selectively restrict the rotation of the inner disc. The unlocking roller is rotatably pivotally mounted on the pressure rod and corresponds to the unlocking cam. The bent portion of the inner disc has a contact surface that engages with the pivot.

Claims

1. A lock structure, comprising: An inner handle is inserted through an inner sleeve plate; A latching cam is attached to the inner handle; an inner turntable is attached to the inner handle and has a plate body, wherein the plate body extends with a bent portion; a rotating shaft is connected to the inner turntable and an outer turntable of the outer handle, and the rotating shaft drives a latch assembly; a pressure rod is movably inserted through the inner sleeve to selectively restrict the rotation of the inner turntable; and a latching roller is rotatably pivotally mounted on the pressure rod and corresponds to the latching cam; wherein the bent portion of the inner turntable has a contact surface that engages with the rotating shaft.

2. The lock structure as described in claim 1, wherein in the locked state, the lever is pressed to restrict the movement of the inner disc, and the bend corresponds to the pivot to prevent the inner disc from sliding relative to the pivot; in the unlocked state, the inner handle is pivoted to sequentially drive the release cam and the inner disc to rotate, the release cam first rotates to push and rotate the release roller of the lever to push the lever back, and the inner disc is rotated to drive the pivot and the latch assembly to complete the door opening action.

3. The lock structure as claimed in claim 1, wherein the unlocking cam is provided with two push blocks, each push block having a pushing surface that pushes against and rotates the unlocking roller of the pressure rod.

4. The lock construction as claimed in claim 3, wherein a distance between the abutting surfaces of the two push blocks is less than the diameter of one of the unlocking rollers.

5. The lock construction as claimed in claim 1, wherein the unlocking cam is provided with a first abutting portion, and an elastic element is disposed between the unlocking cam and the inner sleeve plate, the first abutting portion abutting the elastic element to return from a rotational position to an initial position.

6. The lock construction as claimed in claim 1, wherein the bend of the inner turntable extends perpendicularly to the surface of the plate.

7. The lock structure as claimed in claim 1, wherein the pressure bar is provided with a locking protrusion, the inner turntable is provided with a recess, and the locking protrusion corresponds to the recess.

8. The lock construction as claimed in claim 7, wherein the inner turntable is provided with a reinforcing protrusion, the reinforcing protrusion being disposed adjacent to the recess and protruding vertically along the surface of the plate.

9. The lock construction as claimed in claim 1, wherein the inner turntable is provided with a second abutting portion, an elastic element is disposed between the latching cam and the inner sleeve, and the second abutting portion abuts the elastic element to return from a rotating position to an initial position.

10. The lock construction as claimed in claim 1, wherein the pivot has a plurality of sides, and the bent portion abuts against at least one of the plurality of sides of the pivot.

11. The lock construction as claimed in claim 1, wherein the bottom of the unlocking roller is a shaft, and the unlocking roller is rotatably connected to a pivot hole on the shaft.

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