Card edge connector

1. A card edge connector, comprising:

a housing having a first wall and a second wall which are opposite to each other, a slot between the first wall and the second wall, and a plurality of first terminal grooves spaced apart from each other and provided to the first wall in a row, the first terminal grooves being communicated with the slot respectively;

a plurality of first terminals fixedly provided to the first wall and positioned in the first terminal grooves respectively; and

a terminal block, the terminal block comprising an insulative body engaged with the second wall and a plurality of second terminals spaced apart from each other and provided to the insulative body in a row, each of the plurality of second terminals having a fixed portion fixedly provided to the insulative body, a contact portion extending out of the insulative body and extending into the slot, and a tail portion extending out of the insulative body, wherein the second wall has a mounting groove that corresponds the terminal block, the mounting groove having a first pressing surface and a pair of holding portions positioned at both ends of the first pressing surface and wherein the second wall further has a pair of protrusions provided and corresponding to the mounting groove, the pair of protrusions oppositely protruding into the mounting groove from the pair of holding portions, wherein the insulative body includes two end faces opposite to the holding portions respectively, a pressed surface abutting against the first pressing surface and two recessed grooves recessed from the end faces respectively to received the protrusions respectively and further leave clearances, wherein the insulative body can be floatingly received in the mounting groove.

2. The card edge connector of claim 1 , wherein the first pressing surface presses against the pressed surface so as to limit the insulative body from moving toward the first wall.

3. The card edge connector of claim 2 , wherein the housing is fixed to a circuit board and the second wall is adjacent to the circuit board, the first pressing surface angled toward the circuit board, wherein the terminal block can float relative to the circuit board so as to allow the tail portions of the second terminals to contact the circuit board.

4. The card edge connector of claim 3 , wherein the insulative body further has a bottom surface adjacent to the circuit board, and the recessed grooves extend through the bottom surface.

5. The card edge connector of claim 1 , wherein the second terminals are insert molded into the insulative body.

6. The card edge connector of claim 1 , wherein the tail portions of the second terminals extend toward a direction that is away from the contact portions.

7. A card edge connector, comprising:

a housing having a first wall and a second wall which are opposite to each other, a slot between the first wall and the second wall, and a plurality of first terminal grooves spaced apart from each other and provided to the first wall in a row, the first terminal grooves being communicated with the slot respectively;

a plurality of first terminals fixedly provided to the first wall and positioned in the first terminal grooves respectively; and

a terminal block, the terminal block comprising an insulative body engaged with the second wall and a plurality of second terminals spaced apart from each other and provided to the insulative body in a row, each of the plurality of second terminals having a fixed portion fixedly provided to the insulative body, a contact portion extending out of the insulative body and extending into the slot, and a tail portion extending out of the insulative body, wherein the second wall has a mounting groove that corresponds to the terminal block, the mounting groove including a first pressing surface and a pair of holding portions positioned at both ends of the first pressing surface, and the insulative body is received in the mounting groove and has a pressed surface abutting against the first pressing surface, the first pressing surface presses against the pressed surface so as to limit the insulative body to moving toward the first wall.

8. The card edge connector of claim 7 , wherein each second terminal further has a curved portion extended out of the insulative body and positioned between the fixed portion and the contact portion; the housing further has a plurality of second terminal grooves spaced apart from each other and provide to the second wall in a row, the second terminal grooves are communicated with the slot respectively, the second wall further has a reinforcing portion successively connecting the second terminal grooves and protruding toward the curved portions of the second terminals.

9. The card edge connector of claim 7 , wherein the first pressing surface and the pressed surface are angled in a cooperative manner.