Patent ID: 11883945
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 20:
21. A telescopic handle for folding and unfolding legs of a foldable workbench that also includes a tabletop, the telescopic handle comprising:
an extension part, wherein the extension part is configured to be connected to the workbench legs and the extension part is configured to move with respect to the tabletop and configured to move the workbench legs with respect to the tabletop, and wherein the telescopic handle is rotatably attached to back legs and is attached to front legs through a direction-reversing linkage bar;
a handle part, wherein the handle part moves telescopically inside the extension part and, when locked to the extension part, moves the extension part along, and wherein the handle part locks to the extension part when the telescopic system of the telescopic handle is expanded;
a first push-button subsystem, configured to be attached to the tabletop, including a first switch and two lock-arms, wherein the first switch and the two lock arms have the relationship of a cam and two followers, respectively, and wherein the two lock-arms are designed to engage the extension part and immobilize the extension part with respect to the tabletop, and wherein pressing the first switch disengages the lock-arms from the extension part and unlocks the extension part from the tabletop; and
a second push-button subsystem, configured to be attached to the tabletop, including a second switch and two unlocking-arms, wherein the second switch and the two unlocking-arms have the relationship of a cam and two followers, respectively, and wherein the two unlocking-arms are designed to unlock the extension part from the handle part when pressing the second switch.