US 12,448,830 B2
Door hinge
June Young Lee, Busan (KR); Sang Baek Kim, Gimhae-si (KR); and Kyoung Rok Kim, Busan (KR)
Assigned to SEO WON KOREA CO., LTD., (KR)
Filed by SEO WON KOREA CO., LTD, Gimhae-si (KR)
Filed on Dec. 19, 2023, as Appl. No. 18/544,665.
Application 18/544,665 is a continuation of application No. PCT/KR2022/004879, filed on Apr. 5, 2022.
Claims priority of application No. 10-2021-0156552 (KR), filed on Nov. 15, 2021.
Prior Publication US 2024/0117663 A1, Apr. 11, 2024
Int. Cl. E05F 1/08 (2006.01); E05F 1/12 (2006.01); E05F 1/14 (2006.01); E05F 3/04 (2006.01)
CPC E05F 1/14 (2013.01) [E05F 1/1253 (2013.01); E05F 3/04 (2013.01); E05Y 2201/10 (2013.01); E05Y 2201/256 (2013.01); E05Y 2201/264 (2013.01); E05Y 2201/624 (2013.01); E05Y 2201/638 (2013.01); E05Y 2201/686 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A door hinge, comprising:
an arm installed on a door so as to pivot;
a housing installed on a main body of a mechanism in which the door is provided, the housing being connected to the arm by a hinge shaft and having a first and a second elongated openings provided in one end portion and a center portion thereof, respectively;
a damper casing connected to the arm by the hinge shaft inside the housing, the damper casing having a third and a fourth elongated openings provided in one end portion and the other end portion thereof respectively, and connected to the second opening in the third opening by a rivet, and having one surface supported by a support portion of the housing;
a pair of main links provided respectively on opposite sides of the damper casing inside the housing, the main links being connected to the arm by a link shaft, and having a fifth and a sixth openings provided in one end portion thereof, and being connected to the second and the third openings by the rivet in the sixth opening to linearly move;
a main spring assembly including a spring lever and a main spring sleeved onto the spring lever and being connected to the third and the fifth openings by a pin; and
a damper provided inside the damper casing, one end of which is supported by the rivet, and the other end of which is connected to the fourth opening by a pin to move along a periphery of the arm,
wherein the first opening of the housing is connected to one end portion of the main spring assembly by a pin, the third opening of the damper casing is connected to the second opening of the housing and the sixth opening of the main links by the rivet, and
wherein when the door is opened, the main links move linearly and the damper is compressed by movement of the rivet, and when the door is closed,
the periphery of the arm is in contact with the other end portion of the damper by pivoting of the arm so that the damper is compressed.