Electrical connector for connection to a transmission connector on a device

An electrical connector, comprising:

• a housing internally defining a receiving passage;
• the receiving passage having two opposite ends, namely, an axially front end forming an installation hole and an axially rear end forming a stop hole;
• an inner cap being assembled to an axially inner side of the stop hole of the receiving passage and internally defining a mounting passage;
• a pad being assembled to an axially inner side of the installation hole of the receiving passage and internally defining a holding passage;
• a conductor being extended through and held in the holding passage of the pad with a conducting pin section forward exposed from the holding passage;
• and
• a flat spring member having a front portion forming a clamping end and a rear portion forming an opposite abutting end;
• the abutting end being mounted in the mounting passage of the inner cap, while the clamping end being riveted to an end of the conductor opposite to the conducting pin section;
• the clamping end being forward pressed against a rear end surface of the pad;
• and a spacing chamber being defined between an inner wall surface of the housing and the flat spring member;
• wherein the receiving passage of the housing includes three different bore sizes, namely, a first bore size, a second bore size and a third bore size, which are sequentially arranged and gradually reduced from the installation hole toward the stop hole;
• a first shoulder portion being formed in around the receiving passage at a position where the first bore size is changed into the second bore size, and a second shoulder portion being formed in around the receiving passage at another position where the second bore size is changed into the third bore size;
• the inner cap being rearward stopped by the second shoulder portion;
• and the pad being rearward stopped by the first shoulder portion.