JPH0223977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a crimp type flat cable connector.

[Conventional technology]

A typical undercarpet wiring system is
The flat cable 1 shown in FIG. 1 is constructed by disposing an upper protective sheet (not shown) and a lower protective sheet (not shown) on the upper and lower surfaces. flat cable 1
is a strip-shaped flat conductor 1a arranged in parallel at a predetermined interval and covered with an insulating member 1b,
Perforations 1c for attaching a connector are made at the ridge edges between the strip-shaped flat conductors 1a. Conventionally, a metal connector 2 as shown in FIG. 2 is used to connect these flat cables 1, 1 to each other. That is, this connector 2 has a substantially V-shaped gripping part 2b made up of two gripping pieces connected to both sides of a connecting part 2a, and a ring-shaped electrical connection protrusion 2c is punched out on the opposing surfaces of both gripping parts 2b. At the same time, tongue-shaped mechanical connection protrusions 2d are cut and raised.
As shown in FIG. 4, the upper and lower surfaces of each of the flat cables 1, 1 are pinched together with both gripping parts 2b using a special tool 5. As a result, the electrical connection protrusion 2c breaks through the insulating member 1b of the flat cable 1, contacts the conductor 1a, and connects both flat cables 1, 1 electrically. The opposing mechanical connection protrusions 2d penetrate through the flat cable 1 and engage with each other, and the gripping portion 2b
Both flat cables 1, 1 are mechanically connected while preventing the cables from opening.

[Problem to be solved by the invention]

However, the gripping portion 2b is bent at only one position, and both sides of the gripping portion 2b are bent in a V shape as shown in FIG.
Since the flat cable 1 is closed in the shape of a letter, when the four mechanical connection protrusions 2d pass through the flat cable 1, the grip part 2b bends 3 (Fig. 4), and the mechanical connection protrusions 2d
There was a problem that the cable did not pass through the flat cable 1. Furthermore, the mechanical connection protrusion 2d also performs an electrical connection function, but the grip portion 2b
When closing both sides of the mechanical connection protrusion 2d enters the conductor 1a in an arc as shown by the arrow in FIG. occurs. Therefore,
Electrical contact resistance between the conductor 1a and the mechanical connection protrusion 2d increases.

An object of the present invention is to provide a connector for a flat cable in which a connecting protrusion can reliably penetrate into a flat cable, a reliable electrical connection can be made, and electrical contact resistance can be prevented from increasing. be.

[Means to solve the problem]

The flat cable connector of the present invention is a connector for connecting flat cables each having a band-shaped flat conductor coated with an insulating member, in which connecting protrusions that penetrate through the flat cable and engage with each other are located on opposite surfaces. 2 conductive parts cut and raised facing each other
The gripping piece is composed of a plurality of gripping pieces, and a connecting part that connects these gripping pieces together at their bases and is bent at a different bending part for each of the gripping pieces in a direction in which the opposing surfaces approach each other, A narrow portion is formed in the center of the connecting portion, the effective width of which is narrower in the width direction perpendicular to the connecting direction of the connecting portions.

[Effect]

According to the structure of the present invention, a narrow part is formed in the center of the connecting part that connects the two gripping pieces, and the effective width is narrower than the other parts. When the two gripping pieces are pressed so as to be sandwiched between the two gripping pieces and brought closer to each other, the narrow portion of the connecting portion is easily bent. At this time, since the connecting part and the gripping part are bent at the bending part in the direction in which the opposing surfaces approach each other, the gripping piece becomes almost parallel to the flat cable at the position where the connecting protrusion hits the flat cable. . By further pressing the connection protrusion, the connection protrusion bites into the inner surface of the flat cable perpendicularly while the narrow portion is bent while the gripping piece remains parallel. Therefore, the flat cable can be reliably passed through the connecting protrusion, a reliable electrical connection can be made, and an increase in electrical contact resistance can be prevented.
Moreover, since the connecting protrusions on both grip pieces are cut and raised so that they engage with each other, after the flat cable is connected, the grip pieces do not separate due to the engagement of the connecting protrusions, and the mechanical connection is maintained. Since the connection is secured, it is possible to prevent the flat cable from becoming poorly connected.

〔Example〕

An embodiment of this invention is shown in FIGS. 7 to 10. This flat cable connector 6 has two gripping pieces 7a and two gripping pieces 7a for each gripping part 7.
The connecting portions 7b are connected to each gripping piece 7a by separate bending portions 8, respectively. The bent portion 8 is bent in the direction in which both the gripping pieces 7a approach each other. A connecting portion 7 is provided at the center of the connecting portion 7b.
A row of holes 9 forming a narrow portion 9' having an effective width in the width direction perpendicular to the connecting direction of the holes 9 are formed. Since the other parts are the same as those in the example shown in FIG. 1, the same reference numerals are given and the explanation thereof will be omitted. Note that the mechanical connection protrusion 2d is cut and raised in a direction perpendicular to the bent portion 8.

In this way, the connecting portion 7b is provided between the two gripping pieces 7a, the bent portion 8 is provided between the connecting portion 7b and each gripping piece 7a, and the connecting portion 7b is narrowed by the hole 9. Since the portion 9' is formed, both gripping pieces 7
When the gripping pieces 7a are moved close to each other, the small cross-sectional portion 9' is bent as shown in FIG. 10, and both gripping pieces 7a become parallel to each other. Therefore, the mechanical connection protrusion 2d vertically bites into the flat cable 1, and the gripping piece 7a
The entire flat cable 1 is evenly pressurized, there is no bending of both sides, and the four mechanical connection protrusions 2d penetrate the flat cable 1 and engage securely. The mechanical connection protrusion 2d also serves as an electrical connection to the conductor 1a, but since the mechanical connection protrusion 2d vertically passes through the flat cable 1, the mechanical connection protrusion 2d connects the conductor 1a with the mechanical connection protrusion 2d. Since no gap is generated between the conductor 1a and the mechanical connection protrusion 2d, the electrical contact resistance between the conductor 1a and the mechanical connection protrusion 2d does not increase. Note that the mechanical connection protrusion 2d is
Since it is formed perpendicularly to the bent portion 8, it is less likely to fall down than when it is provided in parallel, and from this reason as well, reliable mechanical holding can be achieved.

Note that in the above embodiment, both the mechanical connection protrusion 2d and the electrical connection protrusion 2c were provided, but since the mechanical connection protrusion 2d also has the function of electrical connection, the electrical connection protrusion 2c does not necessarily need to be provided. Also good.
Further, in the above embodiment, the gripping portions 7 on both sides of the connecting portion 2a
However, only one gripping portion 7 may be formed independently.

〔Effect of the invention〕

The flat cable connector of this invention has two
Since a narrow part with an effective width narrower than the other parts is formed in the center of the connecting part that connects the two gripping pieces, a flat cable is inserted between both gripping pieces, and the two gripping pieces are held together by inserting the flat cable between the two gripping pieces. When pressing the two gripping pieces toward each other, the narrow portion of the connecting portion is easily bent. At this time, since the connecting part and the gripping part are bent at the bending part in the direction in which the opposing surfaces approach each other, the gripping piece becomes almost parallel to the flat cable at the position where the connecting protrusion hits the flat cable. . By further pressing the connection protrusion, the connection protrusion bites into the inner surface of the flat cable perpendicularly while the narrow portion is bent while the gripping piece remains parallel. Therefore, the flat cable can be reliably passed through the connecting protrusion.
A reliable electrical connection can be made and an increase in electrical contact resistance can be prevented. Moreover, since the connecting protrusions on both grip pieces are cut and raised so that they engage with each other,
After the flat cable is connected, the gripping pieces do not separate due to the engagement of the connection protrusions, and mechanical connection is ensured, which has the effect of preventing the flat cable from becoming poorly connected.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a flat cable, Fig. 2 is a perspective view of a conventional connector, Fig. 3 is a perspective view of the flat cable connection state, and Fig. 4 is a cross section showing a faulty connection state. 5 is a sectional view showing another defective state of the connection operation, FIG. 6 is a partial perspective view showing another defective state, and FIG. 7 is a perspective view of an embodiment of the present invention. FIG. 8 is a perspective view of the flat cable connected, FIG. 9 is an enlarged sectional view taken along the line -- in FIG. 8, and FIG. 10 is an explanatory diagram of the connection operation. 1...Flat cable, 1a...Conductor, 1
b... Insulating member, 2a... Continuous part, 2c... Electrical connection protrusion, 2d... Mechanical connection protrusion, 6... Connector, 7... Gripping part, 7a... Gripping piece, 7b...
...Joining part, 8...Bending part, 9...Hole, 9'...
Small section.

Claims (1)

[Claims] 1 A connector for interconnecting flat cables in which a band-shaped flat conductor is covered with an insulating material,
two electrically conductive gripping pieces having connection protrusions that penetrate the flat cable and engage with each other, cut and raised on opposing surfaces to face each other, and connect these gripping pieces together at their bases, and and a connecting portion bent at a different bending portion for each of the gripping pieces in the direction in which the gripping pieces approach each other, and the effective width in the width direction in a direction perpendicular to the connection direction of the connecting portion is greater than that of the other gripping pieces. A flat cable connector in which a narrow portion is formed in the center of the connecting portion.