Head brace with adjustable-length connector and fixation connector thereof

A head brace with an adjustable-length connector, comprising:

• a connector comprising an outer cover body, an inner core body, a reversible structure, and a fixation rope body, wherein said outer cover body is suitable for being sleeved on the outer end of said inner core body, wherein said reversible structure is installed on said inner core body, wherein said fixation rope body is suitable for being connected to said outer cover body and said inner core body, so as to tighten said fixation rope body by the forward rotation of said inner core body relative to said outer cover body, and to relax said fixation rope body by a reverse rotation of said inner core body relative to said outer cover body through said reversible structure, so as to realize the adjustable length of said fixation rope body of said connector;
• and
• a head brace comprising a guidance adapter and a head clamp, wherein said guidance adapter is suitable for being installed on said head clamp, wherein said connector is suitable for being installed on said head clamp through said guidance adapter:
• wherein said inner core body comprises a fixation member and a grip member, wherein said fixation member is integrally connected to said grip member;
• wherein said outer cover body has an inner core accommodation cavity, wherein said fixation member of said inner core body is suitable for being accommodated in said outer cover body through said inner core accommodation cavity of said outer cover body:
• wherein said outer cover body has a first fixation hole, a second fixation hole, and a third fixation hole, wherein said first fixation hole, said second fixation hole, wherein said third fixation hole are located on the side end of said outer cover body, wherein said first fixation hole and said second fixation hole are on one side of said outer cover body, wherein said third fixation hole is on the other side of said outer cover body, wherein said first fixation hole and said third fixation hole are on the same axis.