An electrical connector (1) for receiving an electrical card (2) therein. The connector includes an insulative housing (11), and a plurality of conductive terminals (18) received in the housing. The housing includes a beam (12), and a pair of parallel guiding arms (13) extending in a same direction from opposite ends of the beam respectively. A reinforcing plate (16) interconnects the guiding arms to prevent the guiding arms from bending inwardly when the connector becomes heated during use. A middle portion (162) of the reinforcing plate is offset outwardly from the housing. When the connector becomes heated during use, the reinforcing plate bends inwardly. However, space beneath the reinforcing plate is still sufficient to ensure that the reinforcing plate does not contact the received electrical card, and that the electrical card can be freely inserted into or removed from the connector.
To prevent interference between an electronic element mounted on a circuit board and a casing upon inserting the circuit board into the casing and to facilitate insertion of the circuit board into the casing. A casing adapted to contain a circuit board may have opposed side walls each having a guide groove. Each guide groove has a narrow width portion with an even width in an inner part of the casing and a wide mouthed portion at an inlet port of the casing. The wide mouthed portion has first and second opposed slant surfaces that are gradually spaced away from each other toward the inlet port. The slant starting point of the first slant surface is nearer the inlet port than the slant starting point of the second slant surface. When the circuit board is inclined and inserted through the inlet port into the casing, the leading end of the circuit board initially contacts the first slant surface to restrain the inserting angle of the circuit board, thereby preventing an electronic element mounted on the circuit board from interfering with the peripheral edge of the casing around the inlet port.
