Motor-driven door latch for vehicle

A motor-driven door latch for a vehicle having a vehicle body and a door, the motor-driven door latch comprising:

• a catch part which is caught on a striker mounted on the vehicle to lock the door to the vehicle body or is released from the striker so that the door is configured to be opened from the vehicle body, wherein the catch part comprises a catch having a locking groove and a pawl, the catch and the pawl being installed to be rotatable, wherein the striker mounted on the vehicle body is configured to be caught in or separated from the catch and the pawl being in close contact with the catch to limit rotation of the catch or separated from the catch to allow the catch to be freely rotatable;
• a door locking and releasing part configured to apply torque to the catch part to allow the catch part to be locked to or released from the striker, wherein the door locking and releasing part comprises a main motor that is configured to rotate in a clockwise and anticlockwise direction and includes a first drive gear, a first driven gear engaged with the first drive gear, a pawl release lever coupled to the pawl to be integrally rotated, and a first operating lever that is engaged with the first driven gear and configured to receive the torque through the first driven gear to rotate the pawl release lever;
• a motor-driven emergency door releasing part comprising an auxiliary motor that includes a second drive gear, a second driven gear engaged with the second drive gear, a master locking link including a hook at one end portion thereof and contacted with the second driven gear so that rotation of the second driven gear is limited, and a pressurizing spring configured to apply an elastic force to the master locking link in order to rotate the master locking link in a direction, wherein the motor-driven emergency door releasing part is contacted with the door locking and releasing part by operation of the auxiliary motor when the main motor is not operated;
• an inside emergency operating lever connected with an inside handle installed at the door, the inside emergency operating lever configured to receive an operation force of the inside handle to rotate and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• an outside emergency operating lever connected with an outside handle installed at the door, the outside emergency operating lever configured to receive an operation force of the outside handle to rotate and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• and
• a manual emergency door release part connected with the inside emergency operating lever, the manual emergency door release part configured to receive an operation force of the inside emergency operating lever to move and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• wherein the outside emergency operating lever is installed to be rotatable, one end portion of the outside emergency operating lever being provided with a wire hole with which a wire is connected and another end portion of the outside emergency operating lever being formed with a first long hole;
• and
• wherein the master locking link is provided with a pin shaft inserted into the first long hole.

A motor-driven door latch for a vehicle having a vehicle body and a door, the motor-driven door latch comprising:

• a catch part which is caught on a striker mounted on the vehicle to lock the door to the vehicle body or is released from the striker so that the door is configured to be opened from the vehicle body, wherein the catch part comprises a catch having a locking groove and a pawl, the catch and the pawl being installed to be rotatable, wherein the striker mounted on the vehicle body is configured to be caught in or separated from the catch and the pawl being in close contact with the catch to limit rotation of the catch or separated from the catch to allow the catch to be freely rotatable;
• a door locking and releasing part configured to apply torque to the catch part to allow the catch part to be locked to or released from the striker, wherein the door locking and releasing part comprises a main motor that is configured to rotate in a clockwise and anticlockwise direction and includes a first drive gear, a first driven gear engaged with the first drive gear, a pawl release lever coupled to the pawl to be integrally rotated, and a first operating lever that is engaged with the first driven gear and configured to receive the torque through the first driven gear to rotate the pawl release lever;
• a motor-driven emergency door releasing part comprising an auxiliary motor that includes a second drive gear, a second driven gear engaged with the second drive gear, a master locking link including a hook at one end portion thereof and contacted with the second driven gear so that rotation of the second driven gear is limited, and a pressurizing spring configured to apply an elastic force to the master locking link in order to rotate the master locking link in a direction, wherein the motor-driven emergency door releasing part is contacted with the door locking and releasing part by operation of the auxiliary motor when the main motor is not operated;
• an inside emergency operating lever connected with an inside handle installed at the door, the inside emergency operating lever configured to receive an operation force of the inside handle to rotate and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• an outside emergency operating lever connected with an outside handle installed at the door, the outside emergency operating lever configured to receive an operation force of the outside handle to rotate and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• a manual emergency door release part connected with the inside emergency operating lever, the manual emergency door release part configured to receive an operation force of the inside emergency operating lever to move and to apply torque to the catch part through the motor-driven emergency door releasing part and the door locking and releasing part;
• and
• a key cylinder into which a key for the vehicle is configured to be inserted, the key cylinder being provided with a key nut that is connected with one end portion of a key lever, another end portion of the key lever being connected with the second driven gear.