Mechanism for opening/closing a latch for a motor vehicle door leaf
The present disclosure relates to an opening/closing assistance mechanism for assisting the opening/closing of a latch for an opening. The opening/closing assistance mechanism includes an electric actuator configured to control a closing and an opening of the latch. The electric actuator includes a reducer which includes a drive device configured to perform a displacement stroke which further includes a first stroke portion for the opening of the latch and a second stroke portion for closing the latch. The reducer has a first reduction ratio on the first stroke portion and a second reduction ratio on the second stroke portion. The first reduction ratio is different from, and can be lower than, the second reduction ratio.
1 . An opening/closing assistance mechanism for assisting opening and closing of a latch of a door leaf, the opening/closing assistance mechanism comprising:
an electric actuator configured to control a closing and an opening of the latch, the electric actuator including a reducer comprising a drive device configured to perform a displacement stroke, wherein the displacement stroke comprises a first stroke portion for opening the latch and a second stroke portion for closing the latch, wherein the reducer includes a first reduction ratio on the first stroke portion and a second reduction ratio on the second stroke portion, the first reduction ratio being different from the second reduction ratio,
wherein the reducer comprises a first lever arm controlled in displacement by the drive device when the drive device performs the first stroke portion, a second lever arm controlled in displacement by the drive device when the drive device performs the second stroke portion, and a transmission device configured to be driven by the drive device, and to drive cause the first and second lever arms to pivot around a first axis and a second axis, respectively, the first axis being different from the second axis, the second lever arm being disposed on the transmission device so that the transmission device has an axis of rotation coinciding with the second axis the second lever arm, and
wherein at least one of the transmission device and the drive device is a wheel, and the displacement stroke is a rotation.
2 . The opening/closing assistance mechanism according to claim 1 , wherein the first reduction ratio is lower than the second reduction ratio.
3 . The opening/closing assistance mechanism according to claim 1 , wherein when the drive device performs the first stroke portion, the reducer is configured to generate a first torque and when the drive device performs the second stroke portion, the reducer is configured to generate a second torque, the second torque being greater than the first torque.
4 . The opening/closing assistance mechanism according to claim 1 , wherein when the drive device performs the first stroke portion, the reducer is configured to generate a first speed and when the drive device performs the second stroke portion, the reducer is configured to generate a second speed, the first speed being greater than the second speed.
5 . The opening/closing assistance mechanism according to claim 1 , wherein the second lever arm is shorter than the first lever arm.
6 . The opening/closing assistance mechanism according to claim 1 , wherein the transmission device comprises a pin disposed axially on the transmission device, and the first lever arm comprises a gate configured to be driven by the pin when the drive device performs the first stroke portion.
7 . The opening/closing assistance mechanism according to claim 6 , wherein the pin is configured to pass from a first side of the gate to a second side of the gate when the drive device performs the first stroke portion, and the pin is configured to pass from the second side of the gate to the first side of the gate when the drive device performs a third stroke portion.
8 . A latch comprising:
an opening/closing assistance mechanism according to claim 1 ;
a bolt and a pawl movable between an open position of the latch and a closed position of the latch,
wherein the drive device is configured to drive the bolt into the closed position of the latch when the drive device performs the second stroke portion, and the drive device being configured to drive the pawl into the open position of the latch when the drive device performs the first stroke portion.
9 . The opening/closing assistance mechanism according to claim 1 , wherein the first lever arm is pivotable relative to the transmission device.
10 . The opening/closing assistance mechanism according to claim 9 , wherein the first axis is offset from a rotational axis of the transmission device.
11 . The opening/closing assistance mechanism according to claim 9 , wherein the transmission device comprises a pin disposed axially on the transmission device, and the first lever arm is pivotable by the pin.
12 . The opening/closing assistance mechanism according to claim 1 , wherein the transmission device is rotatable around an axis that is fixed relative to the drive device.