Abstract: A battery connector in which, even when an engagement piece portion that is required for applying a preload to a contact of a contact member rubs with an engagement face formed in a wall face of a housing made of a synthetic resin, possibilities that the engagement face is shaved, and that the engagement piece portion is deformed can be eliminated. In the battery connector, a meandering contact member is housed in a housing. A mountain-like projection of the contact member is projected from an opening of the housing. An engagement piece portion formed in the mountain-like projection is engaged with an engagement face of the housing to apply a preload to the contact. The engagement piece portion has a shape which is free from an angular edge. Specifically, the engagement piece portion has a planar portion, and projection pieces which are continuously integrated with the planar portion through arcuate bent portions. Swollen portions having an arcuate face may be formed on the planar portion.

Abstract: It is an object of the invention to provide a battery connector in which, even when an engagement piece portion (66) that is required for applying a preload to a contact (57) of a contact member (5) rubs with an engagement face (21) formed in a wall face of a housing (1) made of a synthetic resin, possibilities that the engagement face (21) is shaved, and that the engagement piece portion (66) is deformed can be eliminated. In the battery connector of the invention, a meandering contact member (5) is housed in a housing (1). A mountain-like projection (56) of the contact member (5) is projected from an opening (16) of the housing (1). An engagement piece portion (66) formed in the mountain-like projection (56) is engaged with an engagement face (21) of the housing (1) to apply a preload to the contact (57). The engagement piece portion (66) has a shape which is free from an angular edge.

Abstract: A connector includes a housing, and a flange portion which is formed by extending one main surface of the housing in a direction that a first circuit board is inserted. An adapter includes a casing having an insertion port into which a cartridge for first game machine can be inserted, and having a shape capable of being inserted into an insertion port of a second game machine. An adapter circuit board is contained in the casing, and includes a data conversion circuit which converts first game machine data stored in the cartridge for first game machine into data capable of being utilized in the second game machine.