Patent ID: 11873663
Assignee: SMART ELECTRONIC INDUSTRIAL (DONG GUAN) CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 2:
3. The door lock device of claim 2, wherein the movable cavity includes a pair of radially symmetric first movable sub-cavities and a pair of radially symmetric second movable sub-cavities; each first movable sub-cavity includes a first planar inner wall, a second planar inner wall, and an arc-shaped inner wall connecting the first planar inner wall and the second planar inner wall, which are sequentially arranged in a clockwise direction; each second movable sub-cavity includes a first planar inner wall, a second planar inner wall, and an arc-shaped inner wall connecting the first planar inner wall and the second planar inner wall, which are sequentially arranged in a clockwise direction; the first planar inner wall of each first movable sub-cavity is connected to the second planar inner wall of an adjacent second movable sub-cavity upon defining a first obtuse angle therebetween, the second planar inner wall of the first movable sub-cavity is connected to the first planar inner wall of an adjacent second movable sub-cavity upon defining a second obtuse angle therebetween, and the first obtuse angle is the same as the second obtuse angle; the first planar inner wall of each first movable sub-cavity is parallel to the first planar inner wall of the other first movable sub-cavity, the second plane inner wall of each first movable sub-cavity is parallel to the second plane inner wall of the other first movable sub-cavity, the first planar inner wall of each second movable sub-cavity is parallel to the first planar inner wall of the other second movable sub-cavity, and the second planar inner wall of each second movable sub-cavity is parallel to the second planar inner wall of the other second movable sub-cavity; the rotary head is configured to: four outer walls of the rotary head respectively are pressed against two second planar inner walls of the two first movable sub-cavities and two second planar inner walls of the two second movable sub-cavities; when the rotary head rotates in the clockwise direction, the four outer walls of the rotary head respectively rotate in the clockwise direction to generate thrust on the corresponding four second planar inner walls, to drive the first gear and the rotary head to rotate synchronously at a certain angle; when the rotary head rotates in a counter clockwise direction, the rotary head is out of contact with the two second planar inner walls of the two first movable sub-cavities and the two second planar inner walls of the two second movable sub-cavities, the rotary head rotates in the counter clockwise direction relative to the first gear, and during the rotation, after the four outer walls of the rotary head are pressed against the corresponding four first planar inner walls respectively, the above-mentioned relative rotation is stopped.