Patent attributes
A knob is attached to a distal end of a lever and has an approximately cylindrical knob body, a cap attached to a distal end of the knob body, and a metal-plated operating member attached to a side face of the knob body. The knob body has a pair of guiding protrusions that define a slit extending in an axial direction of the lever. The operating member includes a rib formed integrally therewith and a flange coupled to the rib approximately perpendicularly thereto. The flange is wider in width than the slit and engages the guiding protrusions due to insertion of the rib into the slit according to insertion of the operating member into the knob body in the axial direction.