US 12,221,809 B2
Auto-open door lock apparatus for home appliance
Jang-Joo Lim, Seoul (KR); Sang-Won Suh, Jeongeup-si (KR); Jung-Gil Lee, Jeongeup-si (KR); and Hee-Chang Kim, Jeongeup-si (KR)
Assigned to DUAL POWER ELECTRONICS CO., LTD, Jeongeup-si (KR)
Filed by DUAL POWER ELECTRONICS CO., LTD, Jeongeup-si (KR)
Filed on Oct. 6, 2022, as Appl. No. 17/938,484.
Application 17/938,484 is a continuation of application No. PCT/KR2021/003579, filed on Mar. 23, 2021.
Claims priority of application No. 10-2020-0097511 (KR), filed on Aug. 4, 2020.
Prior Publication US 2023/0057425 A1, Feb. 23, 2023
Int. Cl. E05B 47/00 (2006.01); E05B 65/00 (2006.01)
CPC E05B 47/0012 (2013.01) [E05B 65/00 (2013.01); E05B 2047/002 (2013.01); E05Y 2900/30 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An auto-open door lock device comprising a main body cover having an internal space and a motor installed in the main body cover to provide a driving force, the auto-open door lock device comprising:
a locker configured to couple to or separate from a hook that is introduced from an outside through rotation;
a locker shaft having one end connected to the locker and formed at the center of rotation of the locker;
a clutch gear configured to connect to another end of the locker shaft and to induce rotation of the locker;
a locker spring configured to connect to one side of the locker and to provide a rotational restoring force to the locker;
a rack slide configured to provide a rotational force of the motor to the locker through the clutch gear; and
a pinion gear configured to transmit the rotational force of the motor to the rack slide,
wherein the rack slide comprises:
a first rack gear configured to engage with the clutch gear in a predetermined area at one end;
a second rack gear configured to engage with the pinion gear in a predetermined area at another end; and
a micro switch formed between the first rack gear and the second rack gear,
wherein the other end of the locker shaft is formed with a pawl that protrudes from a predetermined area of the outer peripheral surface of a cylindrical column and the pawl is configured to engage with a latch that protrudes from a predetermined area of the inner peripheral surface of the clutch gear.