Abstract: A protector for camera lens includes a shell, a lens, and a positioning member. The shell is formed with an aperture. The lens and the positioning member are received in the aperture, and the lens is restricted from dropping by the positioning member. The positioning member is formed with several axial notches, so that the positioning member is formed in a wave-shaped appearance. Thus, space between the lens and the shell is occupied by the positioning member. Acceptable tolerance of the lens and the shell is increased, and manufacturing precision requirement can be relaxed.

Abstract: A protector for camera lens includes a shell, a lens, and a positioning member. The shell is formed with an aperture. The lens and the positioning member are received in the aperture, and the lens is restricted from dropping by the positioning member. The positioning member is formed with several axial notches, so that the positioning member is formed in a wave-shaped appearance. Thus, space between the lens and the shell is occupied by the positioning member. Acceptable tolerance of the lens and the shell is increased, and manufacturing precision requirement can be relaxed.

Abstract: A pipework has an outer pipe, an inner pipe a position hole, a pressing element and a bolt. The outer pipe has an outer wall. The inner pipe is slidably mounted in the outer pipe. The position hole is formed through the outer wall of the outer pipe and has an inner thread and at least one locating slot. The pressing element is mounted in the position hole and has a mounting recess and at least one locating block formed on and protruding from the pressing element. The blot is connected to the pressing element, is screwed with the position hole and has a body and a mounting head. The body is mounted in the position hole and has a mounting segment and an operating segment. The mounting head is formed on the mounting segment and is mounted rotatably in the mounting recess.