Adhesive tape roll fixing device for an adhesive tape dispenser

An adhesive tape roll fixing device for an adhesive tape dispenser, said tape roll fixing device including a pivotal shaft fixed on a rear portion of a sidewall of a dispenser body for a paper tube of an adhesive tape roller to pivotally fitted thereon, a small roller, a guide roller and a blade provided orderly at a front portion of said sidewall, the adhesive tape of said adhesive tape roll pulled to extend through the gap between said small roller and said guide roller forward to reach and be cut by said blade:

• and,
• Characterized by said pivotal shaft being a cylindrical body extending sidewise from said sidewall, said pivotal shaft having at least two lengthwise slots spaced apart in its cylindrical body, two elastic section walls defined by said two lengthwise slots and possible to be compressed elastically inward, a hook formed at an outer end of each said elastic section member, a one-way constrict wall provided to extend from the outer surface of the cylindrical body of said pivotal shaft closely along and an irregular section wall of the cylindrical body with a gap formed between said constrict wall and said irregular wall of the cylindrical body for said constrict wall to flexibly shrink inward, said one-way constrict wall having its outer end located beyond the inner diameter of said paper tube of said adhesive tape roll fitted on said pivotal shaft so that the paper tube of said adhesive tape roller may be pushed outward and kept in place by said constrict wall of said pivotal shaft after the adhesive tape roll is fitted around said pivotal shaft, said adhesive tape roll fitted on said pivotal shaft being impossible to fall off, said one-way constrict wall elastically expanding tightly said paper tube of said adhesive tape roller to let said adhesive tape roll rotated only forward, but not backward.