| 摘要 |
An electrical card connector (1) has a dielectric housing (10) defining a slot (100) for receiving an electrical card therein and a number of contact passageways (101) fixedly receiving a number of reading contacts (11) therein, and a switch (12) for detecting insertion of the card. Each contact (11) has a contact portion (111) extending into the slot (100) for electrically connecting with the inserted card and a tail portion (112) extending beyond a rear side of the housing (10) for being soldered to a printed circuit board (PCB). The switch (12) consists of first and second conductive plates (121, 122) each having a tail portion connecting with the PCB and a third conductive plate (123) sandwiched between the first and second conductive plates (121, 122) when a card is not inserted into the connector (1), whereby the first and second conductive plates (121, 122) are electrically connected with each other. When a card is inserted into the connector (1), the third conductive plate (123) together with the second conductive plate (122) are pushed away from the first conductive plate (121), during which the second conductive plate (122) generates a reactive spring force larger than that generated by the third conductive plate (123).
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