Connector

1. A connector which is connectable to a structural body provided with an adapter, wherein:

the adapter has an accommodating portion and a sleeve located in the accommodating portion;

the connector comprises an optical connector and a guide member;

the optical connector is fixed to the guide member;

the optical connector is accommodated in the accommodating portion at least in part when the connector is connected to the structural body;

the guide member is provided with a first guide portion and a receiving portion;

the receiving portion receives the adapter at least in part when the connector is connected to the structural body;

the optical connector comprises a ferrule and a holding member which holds the ferrule movably along a mating direction;

the holding member is provided with a second guide portion at a tip portion thereof in the mating direction;

the second guide portion has a surface intersecting with the mating direction;

the ferrule protrudes from the holding member in the mating direction;

the ferrule has a tip which is located between the first guide portion and the second guide portion in the mating direction;

when the connector is connected to the structural body and before the optical connector reaches the accommodating portion, the first guide portion performs rough positioning of the optical connector with respect to the accommodating portion in a plane perpendicular to the mating direction;

when the connector is connected to the structural body, the second guide portion guides the optical connector into the accommodating portion; and

when the connector is connected to the structural body, the tip of the ferrule is received by the sleeve.

2. The connector as recited in claim 1 , wherein:

the adapter has a first outer shape in a plane perpendicular to the mating direction;

the receiving portion has a first inner shape in a plane perpendicular to the mating direction;

the optical connector has a second outer shape in a plane perpendicular to the mating direction;

the accommodating portion has a second inner shape in a plane perpendicular to the mating direction;

the first outer shape and the first inner shape define a first difference therebetween;

the second outer shape and the second inner shape define a second difference therebetween; and

the first difference is larger than the second difference.

3. The connector as recited in claim 1 , wherein:

the structural body comprises a receptacle having a preliminary locking portion;

the connector comprises a barrel having a preliminary locked portion;

when the connector is connected to the structural body, the preliminary locked portion of the barrel is locked by the preliminary locking portion of the receptacle;

the guide member is supported by the barrel so as to be relatively movable in a plane perpendicular to the mating direction and so as to be relatively movable between a first position and a second position in the mating direction;

when the connector is connected to the structural body, the preliminary locked portion is locked by the preliminary locking portion in a state that the guide member is positioned in the second position; and

when the preliminary locked portion is locked by the preliminary locking portion, the tip of the ferrule is received by the sleeve.

4. The connector as claimed in claim 3 , wherein upon connection of the connector to the structural body, rough positioning of the optical connector by the first guide portion and guiding of the optical connector by the second guide portion are carried out before the preliminary locked portion is locked by preliminary locking portion.

5. The connector as claimed in claim 3 , wherein:

the guide member has a mating axis along the mating direction;

the connector further comprises a turn regulating member which regulates a turn of the guide member around the mating axis within a predetermined range;

the turn regulating member has a regulating portion of a flat-plate shape; and the regulating portion is fixed to the barrel.

6. The connector as claimed in claim 5 , further comprising a pressing member which presses the guide member toward the regulating portion.

7. The connector as claimed in claim 3 , wherein:

the receptacle is formed with a thread; and

the connector further comprises a coupling nut which is fixed to the receptacle in a state that the preliminary locked portion of the barrel is locked by the preliminary locking portion of the receptacle.

8. The connector as claimed in claim 7 , further comprising

a waterproofing member placed between the barrel and the coupling nut, wherein

the waterproofing member is sandwiched between the barrel and the coupling nut in a state that the coupling nut is fixed to the receptacle.

9. The connector as claimed in claim 1 , wherein:

the holding member of the optical connector is provided with a main locked portion;

the adapter is provided with a main locking portion; and

when the tip of the ferrule is received by the sleeve, the main locked portion is locked by the main locking portion.

10. The connector as claimed in claim 1 , wherein:

the optical connector is a local connector; and

the adapter is a small form-factor pluggable module or a fiber optic adapter which corresponds to the local connector.

11. The connector as claimed in claim 1 , wherein:

the guide member has a protruding portion which protrudes in a direction intersecting with the mating direction; and

the protruding portion is used to move the guide member along the mating direction.

12. The connector as claimed in claim 1 , wherein

the first guide portion has a main guide portion and a guide protruding portion protruding from the main guide portion along the mating direction.