Receptacle assembly and transceiver module assembly

A receptacle assembly provided with a heatsink, comprising:

• a receptacle cage including
• at least one module accommodating portion provided with at least one module slot located on one end of the module accommodating portion, the module slot configured to allow passage of an optical module, the optical module having a module board provided with a connection end portion at one end portion of the module board, the module accommodating portion configured to detachably accommodate the optical module, and having a bottom wall portion to come into contact with a lower surface of the optical module, and
• at least one connector accommodating portion communicating with the module accommodating portion and configured to accommodate a connector to which the connection end portion of the module board is detachably connected;
• the heatsink selectively placed on the receptacle cage, and having elongated grooves and lock pieces which are formed at predetermined intervals on both side portions of a base portion of the heatsink and configured to dissipate heat generated from the optical module by coming into contact with an outer peripheral portion of the optical module via a heat transfer surface having an area corresponding to an area of the bottom wall portion;
• a heatsink support mechanism provided at the receptacle cage, and having pressing springs which are inserted through the elongated grooves of the heatsink and are slidably engaged with the lockpieces, and configured to support the heatsink slidably along a direction of attachment and detachment of the optical module when the heatsink is placed on the receptacle cage using the elongated grooves;
• and
• a guide plate member which is integrally formed with the receptacle cage, the guide plate member having guide pieces formed continuously with an upper end portion of a cover fixation portion provided at the receptacle cage and configured, when the heatsink is not disposed, to come into contact with an upper surface of a tip end portion of a protection wall of the optical module, which projects toward the connector more than the connection end portion of the optical module, and thus to deflect the tip end portion of the protection wall a predetermined distance into the connector accommodating portion, in such a way as to guide a tip end portion of the connection end portion of the optical module, being inserted through the module slot, to the connector.