US 12,336,511 B2
Lead adjustment apparatus controlled according to different forces for each direction
Yong Joon Jang, Seoul (KR); and Shin Woong Park, Seoul (KR)
Assigned to FIRSPURT INC, Seoul (KR)
Appl. No. 18/289,797
Filed by FIRSPURT INC, Seoul (KR)
PCT Filed Jul. 5, 2021, PCT No. PCT/KR2021/008477
§ 371(c)(1), (2) Date Nov. 7, 2023,
PCT Pub. No. WO2023/277228, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 10-2021-0086568 (KR), filed on Jul. 1, 2021.
Prior Publication US 2024/0260546 A1, Aug. 8, 2024
Int. Cl. A01K 27/00 (2006.01)
CPC A01K 27/004 (2013.01) 12 Claims
OG exemplary drawing
 
1. A lead adjustment apparatus controlled according to different forces for each direction, the lead adjustment apparatus comprising:
a cover portion comprising a plurality of locking means;
a rotating member around which a lead is wound;
a plurality of latches coupled to one side of the rotating member, and rotating with respect to the same axis as the rotating member when force of a preset range is applied to the lead, and opened so as to be locked into some of the plurality of locking means;
an elastic member allowing the plurality of latches to be gathered together; and
a spiral spring adding a rotational force to the rotating member such that the lead is wound,
wherein the plurality of latches are
controlled by the elastic member to be locked into some of the plurality of locking means when the lead is unwound and not to be locked into the plurality of locking means when the lead is wound,
wherein the elastic member includes:
a first elastic body and a second elastic body having different elastic forces, and
an elastic force of the first elastic body is greater than an elastic force of the second elastic body.