JPH0551155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a contact for a connector, and in particular to a contact for a connector suitable for modular connectors used in telephones, measuring instruments, etc. be.

2. Description of the Related Art In recent years, small and inexpensive connectors called modular connectors have been used in telephones, measuring instruments, and the like. This type of modular connector consists of a modular connector socket 10 and a modular connector plug 20, as shown in perspective in FIG. 1 of the accompanying drawings. Generally, the housing 11 of the modular connector socket 10 is
It is made of plastic material and is adapted to be fixed in a mounting opening 31 of a mounting panel 30 by a mounting groove 12 provided in the side surface. A plug receiving opening 13 for receiving a mating modular connector plug 20 is provided on the front surface of the housing 11. Further, a plurality of contacts 40 are arranged in the housing 11 so as to face upwardly into the plug receiving opening 13. These contacts 40
As best shown in FIG. 2, which shows a longitudinal section of the modular connector socket 10, the contacts of the modular connector 20 extend above the plug receiving opening 13 and are inserted therein. contact portion 41 that is bent so that it can be contacted by 50;
It consists of a crimping part 42 and an electric wire 43,
The crimping portion 42 is inserted into the contact arrangement hole 14 of the housing 11 to be fixedly attached to the housing 11.

In the conventional structure of these contacts 40, as shown in a partially enlarged view in FIG. 42 core wire caulking portion 42A
is crimped to the rear end of the contact part 40 and the core wire 43A at the end of the electric wire 43 exposed by the terminal treatment, and the covered caulked part 42B of the crimped part 42 is crimped to the rear end of the electric wire 43.
The contact portion 40 and the core wire 43A of the electric wire 43 were electrically and mechanically connected to each other by being crimped to the sheath 43B of the end of the electric wire 43.

Next, the conventional manufacturing method of such a conventional contact will be briefly explained with reference to FIGS. 5, 6, and 7. First, as shown schematically in FIG. 5A, A metal reel material such as a brass material is pressed in a pressing process to continuously form a crimping part 42 consisting of a carrier 44A, a cut part 44B, a core crimped part 42A, and a cover crimped part 42B, as shown schematically in FIG. 5B. As shown, the carrier 4 carrying a series of crimp parts 42
4A is wound up on the crimp section reel 45.

On the other hand, as shown schematically in FIG. 6, the metal lead material for forming the contact portion 41 of the contactor 40 is obtained by feeding an untreated metal lead material 41A from a supply reel 46 to a gold plating solution in a plating tank 47. 47A, and is wound up on a lead material reel 48 as a plated metal lead material 41B. Such gold plating is applied so that when a metal lead material is used as the contact part 41, it is resistant to corrosion and can obtain good electrical contact with a mating contact. .

Next, as shown in the schematic front view of FIG. 7A and the schematic side view of FIG. The carrier 44A is sent onto the lower mold 49A of the crimping die. At the same time, the electric wire 43 with the terminal treated is placed in a position aligned above the crimping part 42 located on the lower mold 49A of the crimping die. Furthermore, the plated metal lead material 41B is fed from the lead material reel 48 prepared as described above through the feeder 49B and the cutting punch 49C, further above the aligned crimping portions 42 and the ends of the electric wires 43. In this way, the crimp part 4
2. Lower crimping die 49A and cutting punch 4 with electric wire 43 and metal lead material 41B set therein.
By lowering the crimping die upper mold 49D relative to 9C, the metal lead material 41B is cut as the contact portion 41, and the end of the contact portion 41 and the electric wire 4 are cut.
The core wire crimped portion 42A of the crimping portion 42 is crimped to the core wire 43A of No. 3, and the covering crimped portion 42B of the crimping portion 42 is crimped to the sheath 43B of the electric wire 43 at the same time. Contacts are formed. 4A is a sectional view taken along the line AA in FIG. 3, and FIG. 4B is a sectional view taken along the line BB in FIG. 3.

Problems to be Solved by the Invention The conventional connector contact formed in this manner has the following problems.

As mentioned above, in the conventional one, the contact portion 41
Since both the ends of the wire 43A and the wire 43A are crimped at the core crimping part 42A while floating from the crimping part 42, the fine wire constituting the core wire 43A is In order to prevent the wires from being pinched, crimping must be performed with the core wire 43A consisting of a group of thin wires on the lower side and the end of the contact portion 41 on the upper side, that is, the side facing the crimping seam. As shown by reference numeral 0 in FIG. 4B, the crimped seam after crimping of the core wire crimped portion 42A has a round rod-shaped hard contact portion 41 immediately below it.
Because there is an edge, it is impossible to form a shape that cuts into that edge. In this way, the core wire crimped portion 42A
If the end of the crimp seam does not bite into the contact part 41, sufficient crimp force will not be obtained, and the end of the crimp seam will move outward due to the spring back force of the hard contact part. As a result, the electrical and mechanical connection between the contact portion 41 and the core wire 43A cannot be completed.

An object of the present invention is to provide a contact for a connector that eliminates such conventional problems.

Means for Solving the Problems A connector contact according to the present invention includes a crimping portion having a contact crimping portion at the front end, a core crimping portion at the center, and a covering crimping portion having a crimping seam at the rear end; and a contact portion crimped to the crimping portion so as to protrude in front of the crimping portion, and a core wire consisting of a plurality of thin wire groups is pulled out to the rear of the crimping portion to the crimping portion. The electric wire having the wire is crimped, and the contact caulking part of the crimping part
The wire crimping portion of the crimp portion is crimped to the contact portion, and the wire crimping portion of the crimp portion is such that the wire is located on the side facing the crimp seam with respect to the contact portion and the core wire of the wire. It is characterized in that the rear end of the contact portion is located on the lower side and is crimped.

Embodiments Next, the present invention will be described in more detail with regard to embodiments of the present invention based on FIGS. 8 to 13 of the accompanying drawings.

FIG. 8 is a schematic diagram for explaining the first step of an example of a method for manufacturing a connector contactor according to an embodiment of the present invention. As schematically illustrated in FIG. 8, in order to manufacture the connector contacts of the present invention,
First, a metal reel material such as a brass material is pressed in a pressing process to continuously form a crimping part 142 consisting of a carrier 144A, a cut part 144B, a contact crimped part 142A, a core crimped part 142B, and a cover crimped part 142C. . Then, the tip of the continuous lead member 141B for the contact portion, which has not been subjected to special plating treatment such as gold plating, is passed through the feeder 149B and the cutting punch 149C, and one contact caulking portion 142A of the crimping portion 142 and the core wire are passed through the feeder 149B and the cutting punch 149C. Caulking part 142
Send it onto B. Next, contact caulking portion 142A
is crimped onto the tip of the lead member 141B, and the lead member 1 is crimped with a cutting punch 149C.
41B is cut at a predetermined distance from the contact caulking portion 142A to form a contact portion 141 which is crimped and held by the crimping portion 142. The cut end of the contact portion 141 is preferably subjected to a face-shape lowering in the next step, as indicated by reference numeral 141C. Thereafter, these steps are repeated to form a series of crimped parts 14.
2, a series of contact parts 141 are formed which are crimped and held on the crimping parts 142 and the contact parts 14.
The carrier 144A carrying 1 is wound up on a crimp section and contact section reel 145, as schematically shown in FIG.

In the next second step, as schematically shown in FIG. 10, a series of crimping parts 142 holding the contact parts 141 by pressure are carried from the crimping part and contact part reel 145 prepared in the first stage. Carrier 1
44A, and immerse only the portion a of the contact portion 141 crimped and held by the crimping portion 142 protruding from the contact caulking portion 142A into the gold plating liquid 147A in the plating tank 147.
Gold plating is applied only to part a, and then the plated crimp and contact parts are reeled 146.
Roll it up.

In the third stage, which is the next crimping process, the 11th
As shown in the schematic front view of FIG. A and the schematic side view of FIG. The supported carrier 144A is sent onto the lower crimping die 149A. At the same time, the electrical wire 143 with the terminal treated is placed in a position aligned above the crimping part 142 located on the crimping die lower die 149A. As clearly shown in No. 11B, a core wire 143A made up of a group of thin wires is exposed at the end of the wire 143 that has been terminal-treated. Then, the exposed core wire 14 of the electric wire 143
The 3A thin wire group is the core wire crimping part 14 of the crimping part 142.
The covering portion 1 of the terminal of the electric wire 143 is located on the end of the contact portion 141 located at 2B.
43B is the covering caulking portion 142 of the crimp portion 142.
so that it is located on C. In this way, the crimp die upper mold 1
By lowering 49D, the core wire crimping part 1
42B to the end of the contact portion 141 and the core wire 143A, and the sheathing caulking portion 142C to the sheathing portion 143 of the electric wire 143, and by cutting each crimp portion 142 and the cut portion 144B, It is separated from the reel-shaped carrier 144B.

Connector contact 1 manufactured in this way
40 is shown in a partially enlarged view in FIG. 12, FIG. 13A is a cross-sectional view taken along the line A-A in FIG. 12, and FIG. 13B is a cross-sectional view taken along the line B-B in FIG. cross section,
FIG. 13C is a sectional view taken along the line CC in FIG. 12.

As clearly shown in FIGS. 12 and 13, the connector contact 140 as an embodiment of the present invention manufactured in this way has a contact caulking portion 142A at the front end and a core wire at the center. Caulking part 142
B, a crimping part 142 having a cover crimping part 142C at the rear end, a contact part 141 crimped to the crimping part 142 so as to protrude forward of the crimping part 142;
The electric wire 143 is crimped to the crimping part 142 so as to be pulled out to the rear of the crimping part 142, and the contact crimping part 142A of the crimping part 142 is connected to the crimping part 142.
is crimped to the contact portion 141 (the first
3C), only the portion a of the contact portion 141 that protrudes forward from the crimp portion 142 is gold-plated, and the core crimped portion 142B of the crimp portion 142 is gold-plated.
is crimped to the contact portion 141 and the core wire 143A consisting of a group of thin wires of the electric wire 143 (see FIG. 13B), and the cover crimped portion 142C of the crimped portion 142
is crimped to the sheath 143B of the electric wire 143 (see FIG. 13A). The important point here is that
In the connector contact of this embodiment, according to the present invention, as clearly shown in FIG. Core wire 14 consisting of a group
3A and the rear end of the contact part 141 is located below it, and the thin wire group constituting the core wire 143A is attached to the end of the round bar-shaped contact part 141. It is said that the end of the crimped seam digs into the thin wire group of the core wire 143A due to crimping, as shown by reference numeral F in FIG. 13B. That's true.

Note that the tip of the contact portion 141 has a surface protrusion 141C.
and has been plucked.

The tip of the contact portion 141 is provided with a face 141C and is processed with a nail.

Effects of the Invention As described above, in the connector contact of the present invention, the crimping at the core wire crimping portion of the crimping portion is such that the core wire consisting of a group of exposed thin wires is located on the side facing the crimp seam. Since the rear end of the contact portion is located below the crimping portion, the electrical and mechanical connection between the crimping portion, the contact portion, and the core wire is more stable and complete. In other words, unlike the end of the round rod-shaped contact part, the thin wires that make up the exposed core wire are very flexible, so the end of the crimped seam is crimped so that the thin wires of the core wire are Since there is no digging into the group, and there is no spring back force due to the flexible core wire, the crimping portion, the contact portion, and the core wire are electrically and mechanically bonded well and can be stably held.

[Brief explanation of the drawing]

1 is a schematic perspective view showing an example of a modular connector, FIG. 2 is a schematic vertical cross-sectional view of a modular connector socket of the modular connector shown in FIG. 1, and FIG. A partially enlarged view showing an example of a conventional connector contact used in a Yuler connector, FIG. 4A is a sectional view taken along the line AA in FIG. 3, and FIG. 4B is a sectional view taken along the line BB in FIG. 3. Line sectional view, 5th
6 and 7 are schematic diagrams for explaining an example of a conventional manufacturing method for forming the connector contact shown in FIG. FIG. 10 is a schematic diagram for explaining the first step in an example of a method for manufacturing a connector contact according to an embodiment, FIG. 10 is a schematic diagram for explaining the second step, and FIGS. 11A and B are , a schematic diagram for explaining the third step, FIG. 12 is a partially enlarged view showing a connector contact as an embodiment of the present invention, and FIG. 13A is a line taken along line A-A in FIG. cross section,
Figure 13B is a cross-sectional view taken along the line B-B in Figure 12.
FIG. 3C is a sectional view taken along the line CC in FIG. 12. 140...Connector contact, 141...Contact part, 142...Crimp part, 142A...Contact crimping part, 142B...Core crimping part, 142C...Coating crimping part, 143...Core wire, 143A... ...core wire consisting of a group of fine wires, 143B...covered part.

Claims (1)

[Claims] 1. A crimping part having a contact crimping part at the front end, a core crimping part at the center, and a cover crimping part having a crimping seam at the rear end, and a crimping part that protrudes forward of the crimping part. A contact for a connector, comprising a crimped contact part, and an electric wire having a core wire made of a plurality of thin wire groups is crimped to the crimped part so as to be pulled out to the rear of the crimped part,
The contact crimp portion of the crimp portion is crimped to the contact portion, and the core wire crimp portion of the crimp portion is crimped to the contact portion and the core wire of the electric wire.
A contact for a connector, characterized in that the wire is crimped so that the electric wire is located on the side facing the crimping seam, and the rear end of the contact portion is located below the wire.