US 12,442,988 B2
Ferrule and ferrule structure
Hirotaka Asada, Chiba (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Appl. No. 18/036,593
Filed by Fujikura Ltd., Tokyo (JP)
PCT Filed Aug. 25, 2021, PCT No. PCT/JP2021/031231
§ 371(c)(1), (2) Date May 11, 2023,
PCT Pub. No. WO2022/158018, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 2021-008664 (JP), filed on Jan. 22, 2021.
Prior Publication US 2023/0408774 A1, Dec. 21, 2023
Int. Cl. G02B 6/38 (2006.01); G02B 6/40 (2006.01)
CPC G02B 6/3861 (2013.01) [G02B 6/403 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A ferrule structure comprising:
a ferrule comprising:
a main body including an inner wall, an outer wall, and a connection end surface at which a tip of an optical fiber is to be disposed, wherein the inner wall has fiber holes through which the optical fiber is inserted toward the connection end surface;
an adhesive filling part disposed in the main body on an opposite side from the connection end surface with respect to the inner wall;
an upper opening that opens from the outer wall to the adhesive filling part; and
a lower opening that opens from the outer wall to the adhesive filling part and is disposed on an opposite side from the upper opening, wherein
the inner wall has a first surface and a second surface protruding toward the adhesive filling part from the first surface,
the upper opening is opened in a location along the first surface, and
the lower opening is opened in a location along the second surface; and
a boot attached to the ferrule and including:
a fiber insertion hole through which optical fibers are inserted and that is disposed in correspondence with a disposition of the fiber holes;
a lower part that is disposed on one side with respect to the fiber insertion hole and is in contact with the second surface; and
an upper part disposed on another side with respect to the fiber insertion hole and including a protrusion part protruding relative to an end surface of the lower part in a fiber insertion direction.