Patent ID: 11926513
Assignee: HUVITZ CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
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).