Fiber sampling comb for length photograph

The utility model discloses a fiber sampling comb for a length photograph, which comprises a sampling barrel and a comb clip main frame, a perforated plate is mounted on the outer side of the sampling barrel, card clothing is mounted on the outer side of the perforated plate, a rocker arm is movably mounted at one end of the sampling barrel through a pin shaft, and the comb clip main frame is mounted on one side of the rocker arm. A switch is installed at the end, away from the rocker arm, of the sampling barrel, a mounting groove is formed in the upper end of the comb clamp main frame, a comb clamp screw rod is installed on the inner side of the mounting groove, comb needles are installed on the outer side of the comb clamp screw rod, a connecting piece is installed at one end of the comb clamp screw rod, and a wrench is installed at the lower end of the connecting piece; and a brake rod is mounted on one side of the wrench. When the device rotates to a concave gear of the sampling barrel, the brake rod is c