Patent ID: 11885153
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A door lock with an energy saving device, the door lock comprising:
an electromagnet assembly having a locking recess, an electromagnet and a control circuit board, the locking recess is securable in a door frame, the electromagnet has a through hole, the through hole which is set inside of the locking recess, the control circuit board is arranged inside a containing space of the locking recess, the control circuit board using a wire to connect an external power supply, and the control circuit board electrically connected to the electromagnet;
an adsorption assembly having a positioning unit and an iron plate, the positioning unit is for securing on a door board, the iron plate has a slot the iron plate is pivoted on the positioning unit;
a linkage sensing mechanism is arranged in the through hole of the electromagnet, the linkage sensing mechanism having a mandrel, a compression spring assembly, a power switch button, and a button circuit board, wherein the bottom of the power switch button has at least one conductive sheet assembly, the top edge of the control circuit board has a least one contact to form an open loop, and the at least one contact electrically connected to the control circuit board, the mandrel has an ejector head and a flange, the mandrel is enabled to axially slide in the through hole of the electromagnet, the ejector head is set through the external side of the electromagnet, the flange is enabled to compress the compression spring assembly to make it axially stretch, when the mandrel is sliding inward, thereby urging the flange to compress the compression spring assembly to force the power switch button to move towards the direction of the button circuit board, so the conductive sheet assembly will contact the contact of the button circuit board to form a close loop, and when the mandrel is sliding outward, the compression spring assembly rebound to force the power switch button to move away from the direction of the button circuit board, so the conductive sheet assembly will separate from the contact of the button circuit board to form an open loop;
a clutch mechanism is assembled in the adsorption assembly, the clutch mechanism corresponding to the linkage sensing mechanism, the clutch mechanism having a positioning screw and a spring, the spring is assembled in the slot of the iron plate, and the positioning screw set through the spring and is screwed with the positioning unit, so that the positioning unit is enable to displace toward the opposite direction of the iron plate under the action of external force, and drixe the positioning screw to compress the spring, and when the external force disappears, the spring will rebound and drive the positioning unit to return to its original position; and
the operation of the door lock consists of the following steps:
Step a) Start the normal locking mode: when closing the door board to the door frame, the control circuit board supplies power to the electromagnet with the high current of the normal locking mode to attract the iron plate;
Step b) Start the power-saving locking mode, the clutch mechanism will drive the linkage sensing mechanism to act, and trigger the control circuit board to change the power supply to the electromagnet with the low current of the power-saving locking mode to maintain the closed state of the door board;
Step c) When the abnormal external force acts on the door board, the positioning unit of the clutch mechanism is pushed, and the power switch button of the linkage sensing mechanism is driven to move away from the button circuit board, so that the contact of the button circuit board forms an open loop, the control circuit board is triggered to supply the electromagnet with the high current of the normal locking mode to resist the external force;
Step d) When the abnormal external force disappears, the positioning unit of the clutch mechanism is moved back to its original position making the power switch button of the linkage sensing mechanism move toward the direction of the button circuit board, so that the contact of the button circuit board forms a closed loop, and the control circuit board will restore the low current power supply to the electromagnet in the power-saving locking mode, so that the door board continues to maintain the closed state.