Combinable optical-fiber adapter assembly

A combinable optical-fiber adapter assembly, comprising:

• a first optical-fiber adapter comprising a first adapter body, wherein four side walls of the first adapter body define a first receiving cavity, two ends of the first adapter body have first insertion openings in communication with the first receiving cavity, a first side wall of the first adapter body has a plurality of first connection units, and the first side wall of the first adapter body comprises a first connection front portion and a first connection rear portion;
• the first connection units have a first recess at the first connection front portion and a first protrusion at the first connection rear portion, or the first connection units have a second protrusion at the first connection front portion and a second recess at the first connection rear portion;
• and
• a second optical-fiber adapter comprising a second adapter body, wherein four side walls of the second adapter body define a second receiving cavity, two ends of the second adapter body have second insertion openings in communication with the second receiving cavity, a first side wall of the second adapter body has a plurality of second connection units, and the first side wall of the second adapter body comprises a second connection front portion and a second connection rear portion;
• the second connection units have a third protrusion at the second connection front portion and a third recess at the second connection rear portion, or the second connection units have a fourth recess at the second connection front portion and a fourth protrusion at the second connection rear portion;
• wherein the first recess at the first connection front portion of the first adapter body is docked with the third protrusion at the second connection front portion of the second adapter body which is adjacent to the first recess in a one-to-one manner, and the first protrusion at the first connection rear portion of the first adapter body is docked with the third recess at the second connection rear portion of the second adapter body which is adjacent to the first protrusion in a one-to-one manner, so that the first adapter body and the second adapter body adjacent to the first adapter body are assembled with each other side-by-side;
• or wherein the second protrusion at the first connection front portion of the first adapter body is docked with the fourth recess at the second connection front portion of the second adapter body which is adjacent to the second protrusion in a one-to-one manner, and the second recess at the first connection rear portion of the first adapter body is docked with the fourth protrusion at the second connection rear portion of the second adapter body which is adjacent to the second recess in a one-to-one manner, so that the first adapter body and the second adapter body adjacent to the first adapter body are assembled with each other side-by-side;
• wherein the first side wall of the first adapter body has a first engaging portion, the first side wall of the second adapter body has a second engaging portion, and the first engaging portion is assembled with the second engaging portion;
• the first engaging portion has a groove and an insertion hole, each of two sides of the insertion hole has a buckling portion, the second engaging portion has a protruding block, the protruding block is engaged with the groove through the insertion hole, and each of the buckling portions contacts the protruding block and is limited by the protruding block.