Patent ID: 7267192

Claim:
A motor-driven vehicle comprising: a first vehicle body including a sleeve tube that is formed with a hole; a second vehicle body including an insert rod that is disposed telescopically within said sleeve tube of said first vehicle body and that is formed with a longitudinal row of spaced-apart holes; and a locking device including a pull rod disposed movably on said first vehicle body and movable on said first vehicle body between a locking position and a release position, a retaining block disposed fixedly on said pull rod and aligned with said hole in said sleeve tube of said first vehicle body, said retaining block extending through said hole in said sleeve tube and engaging a selected one of said holes in said insert tube of said second vehicle body so as to prevent relative movement between said first and second vehicle bodies when said pull rod is disposed at said locking position, said retaining block being removed from said holes in said insert rod so as to allow for relative movement between said first and second vehicle bodies when said pull rod is disposed at said release position, and a resilient member for biasing said retaining block to said locking position.