Tape threading mechanism
AssigneeNEC Corporation
InventorKenichi Ojima
Life of this patent
Estimating the term…
Abstract
In a tape threading mechanism having a threading arm for moving a leader block from a tape cartridge to a take-up reel, the take-up reel is provided with a guide groove having an intrusion port in the vicinity of the outer periphery of the take-up reel so as to guide a leader block toward the take-up center of the take-up reel. One of side walls of the guide groove, against which the tip of the leader block abuts when the leader block intrudes into the guide groove, is formed in such a manner that the leader block can smoothly move into the take-up-center of the take-up reel.
Claims3
A tape threading mechanism comprising:
- a take-up reel for taking up a magnetic tape within a tape cartridge;
- a leader block to be fixed to a tip of said magnetic tape;
- a threading arm having a threading pin movable in an arcuate trajectory for moving said leader block from said tape cartridge to said take-up reel;
- and
- a guide groove, provided in said take-up reel, for guiding said leader block toward a take-up center from an intrusion port in the vicinity of an outer periphery of said take-up reel,
- wherein on a side wall of said guide groove, outside the arcuate trajectory of said threading pin, a first guide surface is provided,
- wherein a second guide surface is provided on the other side wall of said guide groove, said second guide surface having a curved surface portion in the vicinity of the outer periphery of said take-up reel,
- wherein said first guide surface includes first and second parts,
- wherein said first part of said first guide surface is linear and is provided in the vicinity of said outer periphery of said take-up reel, a surface of said first part is parallel with a center line of said guide groove, and said second part is a curved surface in conformity with the arcuate trajectory of said threading pin, and
- wherein said guide groove is arranged so that when introducing said leader block into said intrusion port, a tip of said leader block abuts against said first part of said first guide surface, and a side surface of said leader block abuts against said curved surface portion of said second guide surface.
A tape threading mechanism comprising:
- a take-up reel for taking up a magnetic tape within a tape cartridge;
- a leader block to be fixed to a tip of said magnetic tape;
- a threading arm having a threading pin movable in an arcuate trajectory for moving said leader block from said tape cartridge to said take-up reel;
- and
- a guide groove, provided in said take-up reel, for guiding said leader block toward a take-up center from an intrusion port in the vicinity of an outer periphery of said take-up reel,
- wherein a first guide surface is provided on a side wall of said guide groove outside the arcuate trajectory of said threading pin, a first part of said first guide surface radially interior to the intrusion port being curved in conformity with the arcuate trajectory of said threading pin, and a second part of said first guide surface in the vicinity of said take-up center being linear,
- wherein a second guide surface is provided on the other side wall of said guide groove, said second guide surface having a curved surface portion in the vicinity of the outer periphery of said take-up reel, and
- wherein said guide groove is arranged so that when introducing said leader block into said intrusion port, a tip of said leader block abuts against said first guide surface, and a side surface of said leader block abuts against said curved surface portion of said second guide surface.
Dependencies are inferred from the claim text.