US 11,795,751 B2
Driving device for a door opener
Hung-Jen Tien, Tainan (TW)
Assigned to I-TEK METAL MFG. CO., LTD, Tainan (TW)
Filed by I-TEK METAL MFG. CO., LTD, Tainan (TW)
Filed on Oct. 15, 2021, as Appl. No. 17/502,254.
Prior Publication US 2023/0097041 A1, Mar. 30, 2023
Int. Cl. E05F 15/63 (2015.01); E05F 15/619 (2015.01)
CPC E05F 15/619 (2015.01) [E05F 15/63 (2015.01); E05Y 2201/434 (2013.01); E05Y 2201/624 (2013.01); E05Y 2201/716 (2013.01); E05Y 2201/722 (2013.01); E05Y 2900/132 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A driving device for a door opener, comprising:
a casing;
a motor coupled to the casing;
a first transmission member rotatably mounted to the casing, wherein the motor drives the first transmission member to rotate;
a sliding member slidably mounted to the casing, wherein the sliding member slides in a lateral direction when the first transmission member rotates;
a connecting rod coupled to the sliding member to move jointly, wherein the connecting rod includes a threaded portion;
a return spring mounted around the connecting rod and not movable in the lateral direction; and
an adjusting ring in threading connection with the threaded section of the connecting rod and located outside of the casing, wherein when the first transmission member does not rotate, rotation of the adjusting ring causes displacement of the adjusting ring in the lateral direction to change an extent of pre-compression of the return spring, wherein when the first transmission member rotates in a first direction, the connecting rod and the adjusting ring together move in the lateral direction towards the first transmission member, and the return spring is compressed, and wherein the first transmission member rotates in a second direction reverse to the first direction, the connecting rod and the adjusting ring together move in the lateral direction away from the first transmission member, and the return spring restores its length.