Ferrule for optical connector

An optical connector ferrule comprising:

• an insertion opening through which one end of a coated optical fiber with the coating removed is inserted;
• a guide groove for guiding said bare fiber inserted through said insertion opening;
• a fiber hole into which said bare fiber guided by said guide groove is inserted;
• an injection port through which adhesive for securing said coated optical fiber to the ferrule is injected;
• and
• a filling space into which the adhesive injected through said injection port is filled, wherein an enlarged portion extending from a distal end of said injection port is formed in front of said filling space in an optical fiber inserting direction, and a ceiling surface of said enlarged portion is inclined downwardly forwardly from said injection port.

An optical connector ferrule comprising:

• an insertion opening through which one end of a coated optical fiber with the coating removed is inserted;
• a guide groove for guiding said bare fiber inserted through said insertion opening;
• a fiber hole into which said bare fiber guided by said guide groove is inserted;
• an injection port through which adhesive for securing said coated optical fiber to the ferrule is injected;
• and
• a filling space into which the adhesive injected through said injection port is filled, wherein an enlarged portion extending from a distal end of said injection port is formed in front of said filling space in an optical fiber inserting direction, and wherein a minute hole capable of inserting said bare fiber therein is formed on a distal end of said fiber hole, and a length of said enlarged portion of said filling space is greater than 40% of a distance from a leading end of said injection port to said minute hole.