Waterproof internal wiring structure for bicycle headset

A waterproof internal wiring structure for a bicycle headset, comprising:

• an upper headset assembly (25) connected between an outer side of a steerer tube of a front fork (10) and an inner side of an upper end of a head tube (20), the upper headset assembly (25) comprising a bearing (30) located at the inner side of the upper end of the head tube (20), a seat (32) positioned on the bearing (30) and including a first hole (321), multiple elongated holes (33) defined through the seat (32) and located around the first hole (321), a C-shaped ring (35) located in the first hole (321), the steerer tube of the front fork tube (10) extending through the ring (35);
• a sealing member (40) being a closed annular shape and having a central hole (41), multiple protrusions (42) formed on a top surface of the sealing member (40) and located around the second hole (41), each protrusion (42) including multiple wire holes (44) which communicate with the elongated holes (33) of the seat (32), each wire hole (44) having a resilient rib (45) extending radially from an inner periphery thereof and forming a central inner hole (451), a diameter of the central inner hole (451) being sized such that the resilient rib (45) matching with a wire (70) passing through the central inner hole (451) to prevent water from entering the head tube (20);
• a cover (50) positioned at the upper end of the head tube (20) and mounted to the sealing member (40), the cover (50) having a third hole (51) and the steerer tube of front fork tube (10) passes through the third hole (51), the cover (50) including multiple passages (53) with which the protrusions (42) of the sealing member (40) are engaged, the passages (53) communicating with the wire holes (44) and the elongate holes (33), and
• an O-ring (60) engaged with the third central hole (51) of the cover (50) and contacting the steerer tube of the front fork (10).