JPH0117098Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a terminal connection component for a flat cable used for signal transmission within and between electronic devices.

BACKGROUND ART Conventionally, the terminal connection of a flat cable is as shown in FIG. and said pad 5
and a connector connection through hole of the printed board are connected by a signal connection pattern 7 and a ground connection pattern 7', and a connector 6 is connected to this connector connection through hole. In addition, as shown in Fig. 2, the flat cable 1 is fixed to the printed board 3 with the fixing rod 2, and the ground core wire 8 is passed through the through hole 10 prepared in the printed board 3 and brought out to the back side. Connect to the ground dedicated pattern,
For the signal core wire 9, connecting parts were used which were connected in the same manner as shown in FIG.

In recent years, as electronic circuit components have become more highly integrated and their packaging density has increased, it has become necessary to use flat cables with an extremely large number of core wires. In the conventional parts, the pitch of the pads 5 becomes smaller in Fig. 1, so
During soldering, there is a risk that adjacent pads may be short-circuited by the solder, and it is difficult to align the core wires and pads, resulting in a decrease in work efficiency and making it difficult to manufacture printed boards. Also, in Figure 2,
Since the signal core wire 9 and the ground core wire 8 are separated, the above-mentioned drawbacks are small, but the printed board with the long through hole 10 is mechanically weak, and if you want to connect the flat cables in multiple stages in the front and back direction, The through holes 10 must be prepared in multiple stages at the front and rear of the printed board 3. If the through holes 10 are provided in multiple stages, it becomes difficult to wire the signal connection pattern 7 to the terminals of the printed circuit board 3, and the electrical effect of the ground on the back side becomes weaker, making it impossible to connect with higher density. Become.

DISCLOSURE OF THE INVENTION The object of the present invention is to provide a flat cable terminal connection component that overcomes the above-mentioned drawbacks.

In order to achieve the above-mentioned object, the present invention includes a ground bus bar 15 for connecting the ground core wire 8 of the flat cable 1, a connector 6 having a signal terminal and a ground terminal, and a printed board 3. The surface layer of this printed board 3 has a core wire connection pad 5 for connecting the signal core wire 9 of the flat cable 1, a through hole 14 for connecting the signal terminal of the connector 6, and these pads 5. It has a signal connection pattern 7 for connecting to the through hole 14 and a ground through hole 13 for inserting the leg of the ground bus bar 15. A ground pattern 12' that is connected and insulated from the surface layer, a through hole 14' for connecting the ground terminal of the connector 6, and a ground connection for connecting the ground pattern 12' and the through hole 14'. It is configured to have a pattern 7'.

Since the present invention is constructed as described above, the pitch of the connecting pads of the flat cable core wires can be increased, which solves difficulties such as soldering, alignment of the core wires and pads, and manufacturing of printed circuit boards. It also has the effect of solving the mechanical and electrical strength insufficiency caused by through holes and the difficulty of wiring, and enabling higher-density connections such as stacking and connecting flat cables in multiple stages.

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows an example of the ground bus bar 15, which is the first component of the present invention, and is inserted into the plate part to which the ground core wire 8 of the flat cable 1 is soldered and into the ground through hole 13. It has multiple legs.

FIG. 4 shows a surface layer of an example of the printed board 3, which is the second component of the present invention, and shows a fixing hole 11 for inserting the flat cable fixing rod 2 and a through hole for inserting the foot of the ground bus bar 15. 13, a ground pattern 12, a core connection pad 5, a signal connection pattern 7, and connector connection through holes 14, 14'.

FIG. 5 shows the back layer of FIG. 4, with fixing holes 11 and through holes 13 penetrating from the front surface,
14, 14', a ground pattern 12' insulated from the surface, and a ground connection pattern 7'.

FIG. 6 shows an embodiment of the present invention, in which all the ground core wires 8 of the flat cable 1 are bent as shown in the figure and soldered to the plaids of the ground bus bar 15. Next, the legs of this ground bus bar 15 are inserted into the through holes 13 of the printed board 3, and the flat cable signal core wire 9 is soldered to the core wire connection pad 5. Further, the flat cable 1 is fixed using the fixing rod 2 and the fixing hole 11, and the ground bus bar 15 and the connector 6 are soldered to the back surface of the printed board 3.

In this embodiment, the printed board 3 is a double-sided board, but it goes without saying that by using a multilayer board, the flat cables 1 can be stacked and connected in multiple stages.

By using the above-mentioned structure, according to the present invention, the drawbacks of the conventional structure are solved and the printed board 3
The pitch of the upper core wire connection pads can be made larger, making it easier to solder, align the core wires and pads, and manufacture the printed board.It also increases the mechanical and electrical strength of the printed board, and allows it to be flat. This has the effect of enabling high-density connections by stacking cables in multiple stages.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of conventional flat cable terminal connection parts, Figure 3 is a perspective view of an example of a ground bus bar, which is the first component of the present invention, and Figure 4 is a perspective view of the present invention. FIG. 5 is a perspective view of the back side of the printed board shown in FIG. 4, and FIG. 6 is a perspective view of an embodiment of the present invention. 1... Flat cable, 2... Flat cable fixing rod, 3... Printed board, 4... Flat cable core wire, 5... Core wire connection pad, 6...
Connector, 7...Signal connection pattern, 7'...
Ground connection pattern, 8... Core wire for ground, 9... Core wire for signal, 10... Through hole, 11...
...Fixing hole, 12, 12'...Ground pattern,
13...Through hole for ground, 14, 14'
...Through hole for connector connection, 15...Ground bus bar.

Claims (1)

[Scope of Claim for Utility Model Registration] A ground bus bar for connecting a ground core wire of a flat cable, a connector having a signal terminal and a ground terminal, and a printed circuit board, and the surface layer of the printed circuit board includes: , a core wire connecting pad for connecting the signal core wire of the flat cable, a signal terminal through hole for connecting the signal terminal of the connector, and a signal connecting pad and the signal terminal through hole. It has a connection pattern and a ground through hole for inserting the leg of the ground bus bar, and a ground connected to the ground through hole and insulated from the surface layer is provided on the back layer of the printed board. A flat cable comprising a pattern, a ground terminal through hole for connecting a ground terminal of the connector, and a ground connection pattern for connecting the ground pattern and the ground terminal through hole. Terminal connection parts.