1. Field of the Invention
The present invention relates to an electrical connector, more particularly to an electrical connector with a modular design.
2. Description of the Prior Art
Most of PCs (personal computer), TV sets and electronic devices have an outer casing provided with built-in electrical connector for electrical connection with a peripheral device (such as DVD player) to facilitate signal transmission therebetween.
Referring to FIG. 1, a conventional electrical connector 100a is shown to include a metal shell 130a, an insulated main body 110a, and a plurality of terminals 120a. The insulated main body 110a is formed with a plurality of retention holes 111a. The terminals 120a are inserted respectively into the retention holes 111a in the insulated main body 110a. Afterward, the insulated main body 110a is inserted into the metal shell 130a, thereby completing assembling of the conventional electrical connector 100a. 
In case the terminals 120a are not aligned with one another along a horizontal plane at an initial condition (i.e. prior to inserting into the main body 11a), collision of the terminals 120 against the peripheral walls defining the retention holes 111a respectively during the insertion may result in partial bending of the terminals and hence disqualified product after assembly, which must be discarded, thereby occurring an extra manufacture expense.
Moreover, the metal shell 130a is usually fabricated according to different designs and different specifications, and has a structure differ from one another. In case, the dimension or design of the metal shell 130a is abruptly changed, the finished insulated main body 110a is unable to complement with the metal shell 130a. The finished insulated main body 110a and the metal shell 130a must be discarded. To open a new mold for fabricating a required insulated main body will cause extra expense for the manufacturers.