Assembly of a circuit board and a flexible flat cable, circuit board, and assembling method for a flexible flat cable

1. An assembly of a circuit board and a flexible flat cable, comprising:

a circuit board including a board body and a connection module disposed on the board body, the board body including a top face, a bottom face, and a side face connected between the top face and the bottom face, the connection module being disposed on the top face, the board body being formed with a positioning slot that is formed through the top face and the bottom face and that is spaced apart from and disposed between the connection module and the side face, and an opening that extends from the side face to the positioning slot and that is in spatial communication with the positioning slot, the positioning slot being elongated and having a first length, the opening being formed through the top face and the bottom face and having a second length shorter than the first length, the board body further including a long side that defines one side of the positioning slot adjacent to the connection module, the long side facing toward the opening; and

a flexible flat cable including a cable main body and a connection unit extending from one end of the cable main body, the connection unit being fixed to the connection module and connected electrically to the connection module, the cable main body having a width greater than the second length, the cable main body being able to pass through the opening and extending through and being positioned in the positioning slot;

wherein the board body includes at least one stop arm that faces toward the long side and that is spaced apart from the long side, the stop arm being configured to stop the cable main body; and

wherein the stop arm includes a guiding inclined face that is connected to the side face and that extends slantwise in a direction from the side face toward the long side, the guiding inclined face facing away from the positioning slot for abutting against the cable main body and for guiding entry of the cable main body through the opening.

2. The assembly of a circuit board and a flexible flat cable as claimed in claim 1 , wherein the first length of the positioning slot is greater than or equal to the width of the cable main body.

3. The assembly of a circuit board and a flexible flat cable as claimed in claim 1 , wherein the board body further includes two short sides that are respectively connected to opposite ends of the long side, the two short sides cooperatively defining the first length of the positioning slot therebetween, the stop arm extending from one of the two short sides and including an end face connected to the guiding inclined face, the other one of the two short sides extending to the side face and cooperating with the end face of the stop arm to define the second length of the opening therebetween.

4. The assembly of a circuit board and a flexible flat cable as claimed in claim 1 , wherein the board body includes two of the stop arms that are spaced apart from each other and that cooperate to define the opening, the stop arms facing toward the long side and being spaced apart from the long side, the stop arms being configured to stop the cable main body.

5. The assembly of a circuit board and a flexible flat cable as claimed in claim 4 , wherein each of the stop arms includes a guiding inclined face that is connected to the side face and that extends slantwise in a direction from the side face toward the long side, the guiding inclined face being configured to abut against the cable main body and guide entry of the cable main body through the opening.

6. The assembly of a circuit board and a flexible flat cable as claimed in claim 5 , wherein the board body further includes two short sides that are respectively connected to opposite ends of the long side, the two short sides cooperatively defining the first length of the positioning slot therebetween, the stop arms extending respectively from the two short sides, each of the stop arms further including an end face connected to the guiding inclined face, the end faces of the two stop arms cooperating to define the second length of the opening therebetween.

7. A circuit board suitable for assembling with a flexible flat cable, the flexible flat cable including a cable main body and a connection unit extending from one end of the cable main body, the cable main body having a width, the circuit board comprising:

a board body including a top face, a bottom face, and a side face connected between the top face and the bottom face, the board body being formed with a positioning slot that is formed through the top face and the bottom face and that is spaced apart from the side face, and an opening that extends from the side face to the positioning slot and that is in spatial communication with the positioning slot, the positioning slot being elongated and having a first length, the opening being formed through the top face and the bottom face and having a second length shorter than the first length, the width of the cable main body being greater than the second length, the cable main body being able to pass through the opening to extend through and be positioned in the positioning slot; and

a connection module disposed on the top face of the board body and configured to fix the connection unit and to connect electrically to the connection unit; and

the positioning slot of the board body being disposed between the connection module and the side face, the board body further including a long side that defines one side of the positioning slot adjacent to the connection module, the long side facing toward the opening;

wherein the board body includes at least one stop arm that faces toward the long side and that is spaced apart from the long side, the stop arm being configured to stop the cable main body; and

wherein the stop arm includes a guiding inclined face that is connected to the side face and that extends slantwise in a direction from the side face toward the long side, the guiding inclined face facing away from the positioning slot for abutting against the cable main body and for guiding entry of the cable main body through the opening.

8. The circuit board as claimed in claim 7 , wherein the first length of the positioning slot is greater than or equal to the width of the cable main body.

9. The circuit board as claimed in claim 7 , wherein the board body further includes two short sides that are respectively connected to opposite ends of the long side, the two short sides cooperatively defining the first length of the positioning slot therebetween, the stop arm extending from one of the two short sides and including an end face connected to the guiding inclined face, the other one of the two short sides extending to the side face and cooperating with the end face of the stop arm to define the second length of the opening therebetween.

10. The circuit board as claimed in claim 7 , wherein the board body includes two of the stop arms that are spaced apart from each other and that cooperate to define the opening, the stop arms facing toward the long side and being spaced apart from the long side, the stop arms being configured to stop the cable main body.

11. The circuit board as claimed in claim 10 , wherein each of the stop arms includes a guiding inclined face that is connected to the side face and that extends slantwise in a direction from the side face toward the long side, the guiding inclined face being configured to abut against the cable main body and guide entry of the cable main body through the opening.

12. The circuit board as claimed in claim 11 , wherein the board body further includes two short sides that are respectively connected to opposite ends of the long side, the two short sides cooperatively defining the first length of the positioning slot therebetween, the stop arms extending respectively from the two short sides, each of the stop arms further including an end face connected to the guiding inclined face, the end faces of the two stop arms cooperating to define the second length of the opening therebetween.