Abstract: A surface mounting method for mounting an electronic part having a great number of contacts onto a circuit board. A jig provided with dummy contacts is prepared whose size, number and arrangement are substantially the same as those of contacts of an electronic part to be mounted on a circuit board. The dummy contacts of the jig are then fitted with mating contacts which are to be fitted with the contacts of the electronic part. Thereafter, the jig provided with the dummy contacts fitted with the mating contacts is mounted onto the circuit board at a predetermined position thereon. The mating contacts are then mounted and fixed onto the circuit board. The jig is then removed from the circuit board. The contacts of the electronic part are then fitted with the mating contacts fixed to the circuit board. As an alternative, double ended socket contact members are prepared, each having socket contacts on both ends.

Abstract: When an electronic card is inserted into the device, a first reject plate is pressed to elongate first and second coil springs to anchor the card. When no writing or reading ROM and RAM of the card, electric current instantaneously flows through a solenoid to cause a stopper stopping a second reject plate to rotate through a slight angle so as to disengage the stopper from a front end of the second reject plate. As a result, the second reject plate is depressed by the second coil spring. At the same time, a reject arm provided on the second reject plate moves a reject oblique surface of a card latch to move the card latch through a slight angle to lower a card guide, so that the card is pushed by the first coil spring out of the device. In this manner, the card is not pushed out during writing or reading and hence contents of the card are not damaged. A solenoid requires only a force for moving the stopper through a small distance. The small solenoid and a little power are sufficient to operate the device.