JPS58927Y2 - Contact structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a contact for electrically connecting conductive wires such as coated round conductive wires and flat cables.

Conventionally, when connecting coated round conductors, flat cables, etc., the coating is removed and then the appropriate terminals are soldered or wrapped, but in the case of flat cables in particular, removing the coating is difficult. It took a lot of time and the efficiency of the connection work was very low.

In order to eliminate this drawback, contacts are already known, for example as shown in FIG. 1, which can be simply connected to the corresponding terminals without first removing the coating.

That is, a slit 1 having a width smaller than the core diameter of the coated conductor connected to the contact is provided, and tapered portions 3, 3 for guiding when pushing the conductor are formed at the tips of the contact pieces 2, 2. When the conductor is guided by the tapered parts 3, 3 and pushed into the slit 1, the covering of the covered conductor is cut off by the corner of the slit entrance part of the taper part 3, and the contact pieces 2, 2 and the coated conductor core wire are separated. electrical connections are made.

However, in this case, a part of the cut-off coating adheres to the conductive wire pushed into the slit 1, and the conductive wire and the contact often fail to come into complete metal-to-metal contact, which poses a problem.

The present invention is intended to solve this problem, and aims to provide a contact structure that allows complete metal-to-metal contact between the conducting wire and the contact.

Next, embodiments of the present invention will be described with reference to FIGS. 2 to 5.

In Figures 2 to 4, 4 is a contact, and 5 is a contact 4.
These are connection pieces that are integrally provided at the bottom of the board, and are formed by punching out a conductive metal plate into a predetermined shape and then bending it.

The contactor 4 protrudes perpendicularly onto the substrate 6 and has contact pieces 8, 8 divided into two by a snot 7.

A circular recess 9 larger than the width of the slit 7 is provided near the entrance of the slit 7.

Further, the tips of the contact pieces 8, 8 are provided with tapered portions 10.10 for guiding when the conductor is pushed in, and chamfers 11 are provided on both sides of the tapered portions 10.10.

Such contacts 4 are arranged in two rows in a staggered manner within the mold 12 to constitute a connector 13, as shown in FIG. 5, for example.

In the figure, 14 is a cover, 15 is a flat cable, and the arrangement pitch P of the contacts 4 is the core wire 16 of the flat cable 15.
The cover 14 is provided with holes 17 in the same arrangement as the contacts 14 of the connector 13.

To connect the flat cable 15 to the contacts 4, arrange the flat cable 15 so that the core wires 16 correspond to the arranged contacts 4, and then install a cover on top of the flat cable 15 so that the holes 17 correspond to the contacts 4. 14, when the cover 14 is pressed from above, each of the core wires 16 connects to the tapered portion 10 of the contact pieces 8, 8.
When pushed into the slit 7, the coating is cut off by the corner 18 of the slit entrance of the tapered part 10, and each core wire 16 comes into contact with the contact pieces 8, 8 of the contact 4. Connection is complete.

At this time, conventionally there was a problem that a part of the cut off coating adhered to the conductive wire pushed into the slit and increased the contact resistance, but in the present invention, the slit 7 is attached to the part near the entrance of the slit 7. Since the circular quadrant 9 is provided with a width greater than the width of the recess 9, the sheathing cut off by the corner 18 of the tapered part 10 and pushed together with the conductor is forced into the recess 9.

This coating is left in the recess 9 when the conducting wire is pushed into the slit 7, and the coating does not adhere to the conducting wire pushed into the slit, so that the contact and the conducting wire are in complete metal-to-metal contact. .

This effect is due to the fact that the recess 9 is larger than the slit 7, so naturally there is a second slit at the boundary between the recess 9 and the slit 7.
This is further ensured by the fact that the second corner has the effect of re-cutting the covering of the conducting wire pushed into the slit 7 from the recess 9.

In this case, if the slit 7 is formed into a tapered wedge shape, the contact and the conducting wire can be connected more completely.

Further, the chamfer 11 of the tapered portion 100 serves to facilitate removal of the covering.

Note that a terminal of another connector or the like is inserted into the lower connecting piece 5 of the contactor 4 disposed in the connector 13 to establish an electrical connection with an external device.

When inserting the terminal of another connector into the connecting piece 5,
However, this problem can be solved by providing a relief a in the substrate 6 as shown in FIG. 2, as shown in FIG.

As described above, according to the present invention, when the conductor is pushed into the slit, the coating that adheres to the conductor is pushed out and remains in the recess provided near the entrance of the slit, and the contact and the conductor are separated. Since the metals are connected while maintaining complete metal-to-metal contact, it is possible to reduce contact resistance.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional contactor. 2 to 5 show examples of the structure of the contact according to the present invention, FIG. 2 is a front view of the contact, FIG. 3 is a front view of the contact, and FIG.
FIG. 4 is a plan view, FIG. 4 is a side view, and FIG. 5 is a perspective view showing the connection between a connector incorporating a contact and a flat cable. In the figure, 4 is a contact, 7 is a slit, 8 is a contact piece, 9 is a recessed portion, 10 is a tapered portion, 15 is a flat cable, and 16 is a core wire.

Claims (1)

[Scope of utility model registration request] It is made of a conductive metal and has l pairs of contact pieces facing each other through a slit at one end, the slits having a width smaller than the core diameter of the coated conductor to be connected, and a conductor at the tip of each contact piece. A contact element is provided with a tapered part for guiding during pushing, and a corner for cutting off the conductor's covering is formed at the entrance part of the tapered part to the snot. A structure of a contact, characterized in that a circular recess is provided in a portion thereof, the width being larger than the width of the slit.