Patent ID: 11904748
Assignee: SEOYON E-HWA CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 12:
13. The rotatable armrest apparatus of claim 9,
wherein the hinge shaft includes a cam having three stepped portions,
wherein the locking key assembly includes a locking key, a locking key cover, and a locking key spring, and the locking key cover is provided on the upper brake wheel cover, and
wherein the locking key is provided on the locking key cover, a first end portion of the locking key is connected to a wire of the button system, a second end portion of the locking key is engaged with one of the three stepped portions of the cam, and the locking key spring applies a force to the locking key in a direction toward the one stepped portion.