Connector assembly, plug connector and core unit thereof

A plug connector, comprising a core unit and a protective casing disposed outside and shielding the core unit, wherein a front end of the core unit—is an inserted end, the core unit comprises a front casing and a rear casing oriented and assembled in front and rear directions, the rear casing is provided with a guide mounting structure for disposing an optical cable inside the rear casing, the rear casing faces backward to stop the protective casing, the front casing is provided with a plug body at a front end thereof, and a limiting structure is arranged between the front casing and the rear casing to limit positions to which the front casing and the rear casing are separated in the front and rear directions,

• wherein a spring is pressed and disposed between the rear casing and the plug body,
• wherein the rear casing is oriented and inserted in the front casing, and the limiting structure comprises an inner flange disposed on an inner side wall of the front casing and further comprises an outer protrusion disposed on an outer circumferential surface of the rear casing and stopping and fitting with the inner flange from front to rear,
• wherein the front casing comprises a supporting base at a lower side and a cover plate at an upper side, and a guide mounting groove for installing the spring is disposed on the supporting base,
• wherein the cover plate is buckled onto an upper end of the supporting base so as to fixed two left and right supporting arms of the supporting base at a rear end of the front case.

A connector assembly, comprising a plug connector and a receptacle connector, wherein the plug connector includes a core unit and a protective casing disposed outside and shielding the core unit, a front end of the core unit is an inserted end, the core unit comprises a front casing and a rear casing oriented and assembled in front and rear directions, the rear casing is provided with a guide mounting structure for disposing an optical cable thereto, the rear casing faces backward to stop the protective casing, the front casing is provided with a plug body at a front end thereof, and a limiting structure is arranged between the front casing and the rear casing to limit positions to which the front casing and the rear casing are separated in the front and rear directions,

• wherein a spring is pressed and disposed-between the rear casing and the plug body, and a connection channel configured to allow optical cores of the plug bodies to pass through together is formed inside the spring,
• wherein the rear casing is oriented and inserted in the front casing, and the limiting structure comprises an inner flange disposed on an inner side wall of the front casing and further comprises an outer protrusion disposed on an outer circumferential surface of the rear casing and stopping and fitting with the inner flange from front to rear,
• wherein the front casing is formed by a supporting base at a lower side and a cover plate at an upper side that are engaged with each other,
• wherein the cover plate is buckled onto an upper end of the supporting base so as to fixed two left and right supporting arms of the supporting base at a rear end of the front case.