# US 12,110,714 B1 · Door lock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,714 B1 - Document ID: US12110714B1 - Status: Granted - Kind: B1 - Application number: 18/398,898 - Filed: 2023-12-28 - Granted: 2024-10-08 - Earliest claimed: 2023-12-28 - Applicants: Shenzhen Bida Technology Co., Ltd.; Shenzhen Condensation Technology Co., Ltd. - Inventors: Jianbo Situ - Web page: https://patentgrep.com/patent/US12110714B1 ## CPC - E05B 47/0012: {with rotary electromotors (actuators with rotary electromotors per se H02K7/06, H02K23/68)} - E05B 2047/002: {Geared transmissions} - E05B 2047/0026: {Clutches, couplings or braking arrangements} - E05B 2047/0067: {Monitoring} - E05B 2047/0084: {Key or electric means; Emergency release} - E05B 2047/0094: {Mechanical aspects of remotely controlled locks} - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS ## Abstract Disclosed is a lock, including a first transmission assembly, a second transmission assembly, a spindle, and a dead bolt. The second transmission assembly includes a first gear, and the spindle is connected to the first gear and the dead bolt. The first transmission assembly includes a second gear, a third gear, and a connector, the connector connects the second gear to the third gear, and the second gear is in meshed connection with the third gear. The third gear has a first position, a second position, and a third position in respect to the first gear. ## Claims ### Claim 1 A lock, comprising a first transmission assembly, a second transmission assembly, a motor, a spindle, and a dead bolt, wherein the second transmission assembly comprises a first gear arranged rotatably, and the spindle is connected to the first gear and the dead bolt; the first transmission assembly comprises a clutch assembly, the clutch assembly comprises a second gear, a third gear, and a connector, the connector connects the second gear to the third gear, and the second gear is in meshed connection with the third gear; the motor is connected to the second gear and configured to drive the second gear to rotate, and the second gear is configured to drive the third gear to rotate; the third gear has a first position, a second position, and a third position in respect to the first gear; when the third gear is in the first position, the third gear is in meshed connection with the first gear, the third gear is configured to drive the first gear to rotate along a first direction, the first gear drives the spindle to rotate, and the spindle drives the dead bolt to move and retract; when the third gear is in the second position, the third gear is separated from the first gear; and when the third gear is in the third position, the third gear is in meshed connection with the first gear, the third gear is configured to drive the first gear to rotate along a second direction, the first gear drives the spindle to rotate, and the spindle drives the dead bolt to move and extend, wherein the second direction is opposite to the first direction; the clutch assembly further comprises a first shaft connected to the third gear and the connector, and the third gear is configured to rotate about an axis of the first shaft; the first shaft comprises an excess part located on one side of the connector that faces away from the third gear; and the first transmission assembly further comprises a first limit element connected to the excess part and the connector. ### Claim 2 (depends on 1) The lock according to claim 1, wherein the first shaft comprises a flange located on one side of the third gear that faces away from the connector and connected to the third gear; and the clutch assembly further comprises a first elastic element arranged between the connector and the third gear and connected to the connector and the third gear. ### Claim 3 (depends on 1) The lock according to claim 1, wherein the third gear is configured to drive the first shaft to rotate synchronously. ### Claim 4 (depends on 1) The lock according to claim 1, wherein the first shaft is fixedly connected to the connector. ### Claim 5 (depends on 1) The lock according to claim 1, wherein the clutch assembly further comprises a second shaft connected to the second gear and the connector, and the second gear is configured to rotate about an axis of the second shaft. ### Claim 6 (depends on 1) The lock according to claim 1, wherein the second transmission assembly further comprises: a fourth gear arranged rotatably and connected to the first gear, wherein the fourth gear is provided with a first groove and second grooves, the first groove is concavely arranged along an axial direction of the fourth gear, and the second grooves communicate with the first groove and are concavely arranged along a diameter direction of the fourth gear and a direction away from an axis of the fourth gear, wherein the axial direction of the fourth gear coincides with an axial direction of the spindle; guards arranged in the first groove and connected to the spindle and the fourth gear, wherein each of the guards comprises a bulge arranged in a manner of extending along the diameter direction of the fourth gear and the direction away from the axis of the fourth gear; and second elastic elements connected to the guards; wherein the guards have a first state and a second state in respect to the fourth gear; when the guards are in the first state, the bulges are located in the second grooves, and the fourth gear, the guards, and the spindle are configured to rotate about the axis of the fourth gear; and when the guards are in the second state, the bulges are separated from the second grooves and connected to a side wall of the first groove, the second elastic elements are in a compressed deformation state, and the guards and the spindle are configured to rotate relative to the fourth gear. ### Claim 7 (depends on 6) The lock according to claim 6, wherein the fourth gear is provided with the plurality of second grooves arranged along a circumferential direction of the fourth gear; and the second transmission assembly comprises the two guards and the two second elastic elements, the two guards are symmetrically arranged with the axis of the fourth gear as a center, each of the two second elastic elements is connected to the two guards, and the two second elastic elements are symmetrically arranged with the axis of the fourth gear as the center. ### Claim 8 (depends on 6) The lock according to claim 6, wherein each of the guards further comprises a base, the bulge is arranged on the base, and the bases are connected to the second elastic elements; the second transmission assembly further comprises a second limit element, and the second limit element comprises a first part and second parts connected to each other; the bases are located between the first part and a bottom wall of the first groove along the axial direction of the fourth gear; and the second parts are located between the bases and the side wall of the first groove along the diameter direction of the fourth gear. ### Claim 9 (depends on 8) The lock according to claim 8, wherein the second limit element comprises the plurality of second parts arranged along the circumferential direction of the fourth gear, and a gap is provided between adjacent two of the plurality of second parts; and at least part of the bulge is located in the gap. ### Claim 10 (depends on 8) The lock according to claim 8, wherein the second limit element further comprises guide parts arranged at the first part and connected to the guards. ### Claim 11 (depends on 8) The lock according to claim 8, wherein the second limit element is provided with a first through hole; and the spindle comprises a first limit part located in the first through hole and connected to a side wall of the first through hole, and the first limit part and the first through hole are configured to cause the spindle and the second limit element to rotate synchronously. ### Claim 12 (depends on 8) The lock according to claim 8, wherein the second limit element further comprises a detection part arranged at the first part; and the lock further comprises a sensor configured to monitor an angular position of the detection part. ### Claim 13 (depends on 1) The lock according to claim 1, further comprising: a knob connected to the spindle and configured to drive the spindle to rotate; and a lock cylinder assembly connected to the spindle and configured to be inserted with a key and drive the spindle to rotate; wherein the lock cylinder assembly and the knob are located at two ends of the lock respectively along the axial direction of the spindle. ### Claim 14 (depends on 1) The lock according to claim 1, further comprising: a circuit board connected to the motor and configured to control the motor; and a password assembly connected to the circuit board. ### Claim 15 (depends on 14) The lock according to claim 14, further comprising a fingerprint assembly connected to the circuit board. ### Claim 16 (depends on 14) The lock according to claim 14, further comprising a card swiping assembly connected to the circuit board. ### Claim 17 (depends on 14) The lock according to claim 14, further comprising a Bluetooth assembly connected to the circuit board. ### Claim 18 (depends on 14) The lock according to claim 14, further comprising a communication assembly connected to the circuit board.