US 11,926,513 B2
Up-and-down driving device
Chang Sung Kim, Gyeonggi-do (KR); and Young Woo Lee, Gyeonggi-do (KR)
Assigned to HUVITZ CO., LTD., Gyeonggi-Do (KR)
Filed by HUVITZ CO., LTD., Gyeonggi-do (KR)
Filed on May 24, 2021, as Appl. No. 17/328,841.
Claims priority of application No. 10-2020-0062957 (KR), filed on May 26, 2020.
Prior Publication US 2021/0371257 A1, Dec. 2, 2021
Int. Cl. B66F 3/10 (2006.01); F16F 3/04 (2006.01)
CPC B66F 3/10 (2013.01) [F16F 3/04 (2013.01); F16F 2228/06 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An up-and-down driving device, comprising:
a fixed housing (120);
an up-and-down driving unit (150) movably inserted into an inner space of the fixed housing (120);
a driving means configured to move the up-and-down driving unit (150) in an up-and-down direction;
a fixed-position compression spring main module (100) comprising a fixed-position compression spring (130) having one side fixed to a lower end of the fixed housing (120) and the other side supporting the up-and-down driving unit (150) and mounted in a motion direction of the up-and-down driving unit (150);
a variable-position compression spring supplemental module (200) comprising a variable-position compression spring (250) having one side mounted rotatably to a side of the fixed housing (120) and the other side fastened rotatably to the up-and-down driving unit (150) and configured to rotate while making a predetermined angle with the motion direction of the up-and-down driving unit (150);
a rail (165) configured to guide an up-and-down movement direction of the up-and-down driving unit (150), the rail (165) being formed inside the fixed housing (120); and
a sliding unit (160) configured to move along the rail (165), the sliding unit (160) being mounted to a side of the up-and-down driving unit (150) so as to guide the up-and-down driving unit (150) to move up and down inside the fixed housing (120).