JPH0228233B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a contact for a connector, and in particular to a method of manufacturing a contact for a connector suitable for modular connectors used in telephones, measuring instruments, etc. It is.

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 view in FIG. 1 of the accompanying drawings. Generally, the housing 11 of the modular connector socket 10 is
It is molded from a plastic material and is adapted to be fixed to the mounting opening 31 of the mounting panel 30 through mounting grooves 12 provided on the side. 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 seen in FIG. 2, which shows a longitudinal cross-section of the modular connector socket 10. A contact portion 41 that extends above the plug receiving opening 13 and is bent so as to be contacted by the contact 50 of the modular connector plug 20 inserted therein, a crimp portion 42, and an electric wire 43. The crimping portion 42 is inserted into the contact arrangement hole 14 of the housing 11 and fixed to the housing 11.

In the conventional structure of these contacts 40, as shown in a partially enlarged view in FIG. Core wire caulking portion 42 of portion 42
A 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 cover crimped part 42B of the crimped part 42 is attached to the 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, a brief explanation of the conventional method of manufacturing a contactor will be given with reference to FIGS. 5, 6, and 7. As shown schematically in FIG. 5A, first, a brass material is A crimping part 4 consisting of a carrier 44A, a cut part 44B, a core crimped part 42A, and a covering crimped part 42B is formed by a pressing process.
2 and carrying a series of crimp portions 42, as schematically illustrated in FIG. 5B.
is wound on the crimping 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. Further, the metal lead material 41B plated from the standard lead material reel 48 as described above is fed further above the aligned crimp portions 42 and the ends of the electric wires 43 through the feeder 49B and the cutting punch 49C. 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.

The conventional connector contact formed in this manner has the following problems.

(1) It is sufficient that the portion of the contact portion 41 that protrudes forward from the crimp portion 42 is plated with gold; It ended up being gold-plated, which added to the price unnecessarily.

(2) The contact area is formed by feeding a continuous gold-plated lead material 41B with a feeder 49B and cutting it with a cutting punch 49C, so there is no chance of the plating peeling off or scratches. This caused a lack of reliability.

(3) Since the tip of the contact portion 41 remains cut after plating, it becomes an edge shape and the cut is not plated, making it difficult for people to install the contact into the housing. There were problems such as damage to fingers and corrosion from the cut surfaces.

(4) With both the end of the contact part 41 and the core wire 43A of the electric wire 43 floating above the crimping part 42,
In order to simultaneously crimp and swage the core wire 42A, insert the core wire 43A at the seam of the core wire crimping portion 42A.
To prevent the wire from being pinched,
Crimp crimping must be performed with A on the lower side and the end of the contact portion 41 on the upper side, and as shown by reference numeral 0 in FIG. Since there is an end of the round rod-shaped hard contact portion 41 immediately below it, it becomes O-ring-shaped. Therefore, sufficient crimp force was not obtained, and the center of the core wire 45A became unstable.

(5) As mentioned in Section 4 above, the end of the contact part 41 and the core wire 43A of the electric wire 43 are both connected to the crimp part 42.
Since the contact portion 41 is crimped and caulked at the same time while floating, the contact portion 41 is bent, which causes inconvenience when assembling it into the connector housing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a method for manufacturing a connector contact that is inexpensive, reliable, and easy to handle.

The method for manufacturing a connector contact according to the present invention includes:
A series of crimping parts are formed which have a contact crimping part at the front end, a core crimping part at the center, and a cover crimping part at the rear end, and are connected by a reel-shaped carrier, and the tip of the continuous lead member for the contact part is connected by a reel-shaped carrier. The feeder feeds the crimping part onto the contact crimping part and the core crimping part, crimping the contact crimping part against the tip of the lead member, and moving the lead member from the contact crimping part to a predetermined position. A contact portion is cut at a distance to form a contact portion that is crimped and held on the crimped portion, and this is then repeated to form a series of contact portions that are crimped and held on a series of crimped portions, and the crimped portion of the series of contact portions is The part protruding forward from the crimping part is plated, and the exposed core wire of the terminal-treated electric wire is located on the end of the contact part located in the core wire crimping part of the crimping part, and Arrange the wire against a series of crimping parts such that the covering portion of the wire end is located on the covering crimped part of the crimping part, and place the core wire crimping part against the contact part end and the core wire. Crimp-bonding the sheathing caulking portion to the sheathing portion of the electric wire,
The present invention is characterized in that each of the crimp portions is separated from the reel-shaped carrier.

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 in an embodiment of the method for manufacturing a connector contactor of the present invention. As schematically shown in FIG. 8, in order to manufacture the connector contactor of the present invention, first, a metal reel material such as brass material is pressed into a carrier.
44A, cut portion 144B and contact caulking portion 14
2A, the core crimped portion 142B, and the cover crimped portion 14
A crimp portion 142 consisting of 2C is continuously formed. A continuous lead member 141 for the contact portion is not subjected to special plating treatment such as gold plating.
The tip of B is attached to feeder 149B and cutting punch 1.
49C and feed it onto one contact crimping part 142 of the crimping part 142 and the core crimping part 142B. Next, the contact caulking portion 142A is crimped to the tip of the lead member 141B, and the lead member 141B is cut at a predetermined distance from the contact caulking portion 142A using a cutting punch 149C, and the lead member 141B is crimped to the crimp portion 142. Retained contact portion 14
form 1. The cut end of the contact portion 141 may be subjected to surface polishing in the next step, as indicated by reference numeral 141C. Thereafter, these steps are repeated to form a series of contact parts 141 crimped and held by a series of crimping parts 142, and a carrier 144A carrying these series of crimping parts 142 and contact parts 141 is shown schematically in FIG. As shown, the crimping portion and contact portion are wound on a reel 145.

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 and keep it.

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 carrier 144A is sent onto the lower mold 149A of the crimping die. 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. At this time, the exposed core wire 143A of the wire 143 that has been terminal-treated is located on the end of the contact portion 141 located in the core wire crimp portion 142B of the crimp portion 142, and the end of the wire 143 is coated. The portion 143B is positioned on the cover caulking portion 142C of the crimp portion 142. In this way, the crimp part 142 and the electric wire 1
Crimping die lower mold 149A with 43 set
By lowering the crimping die upper mold 149D, the core wire crimped portion 142B is attached to the contact portion 14.
1 and the core wire 143A, the sheathing crimp portion 142C is crimped to the sheathing portion 143B of the electric wire 143, and each crimp portion 142 is attached to the cut portion 1
By cutting 44B, it is separated from the reeled 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 caulking part 142A of the crimping part 142 is provided.
is crimped to the contact portion 141 (see FIG. 13C), and only the portion a of the contact portion 141 that protrudes forward from the crimped portion 142 is gold-plated. Core wire caulking part 142
B represents the contact portion 141 and the core wire 143A of the electric wire 143.
(See Figure 13B)
The cover crimped portion 142C of the crimp portion 142 is connected to the wire 1.
43 (see FIG. 13A). In addition, in this embodiment, the 13th
As clearly shown in Figure B, the cable crimped portion 1
42B has the electric wire 14 on the side facing the crimp seam.
3 core wire 143A is located and the contact portion 14 is located below it.
1, and is crimped into an F crimp mold as shown by reference numeral F, so that the contact portion 141
The tip has a surface 141C and is finished with a nail.

Since the method for manufacturing a connector contactor of the present invention has the above-described configuration, it has the following effects.

(1) Since the contact portion 141 is only partially plated, expensive plating liquid such as gold plating liquid can be saved, and the price of the contact as a whole can be reduced. Can be done.

(2) Before plating, the contact part 141 is continuously fed with lead material using a feeder, cut, crimped and swaged, and then partially plated, so there is no chance of peeling off the plating or scratching the surface after plating. do not have.

(3) The tip of the contact portion 141 is cut off before plating, and can be plated after the cut portion is surface-blended, so no edges remain on the tip surface, and the plating Since the contacts are not left untreated, there are no inconveniences such as injuring people's fingers when assembling the contacts to the connector housing, or corrosion progressing from the cut surfaces.

(4) Since the contact portion 141 is crimped to the contact caulking portion 142A in the first stage pressing process, no bending occurs in the contact portion 141.
There are no problems when assembling the contacts into the connector housing.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing an example of a modular connector, Fig. 2 is a schematic vertical sectional view of a modular connector socket of the modular connector shown in Fig. 1, and Fig. 3 is a schematic vertical sectional view of the modular connector shown in Fig. 1. FIG. 4A is a sectional view taken along the line A-A in FIG. 3, FIG. 4B is a sectional view taken along the line B-B in FIG. 3, and FIG. 5, 6, and 7 are schematic diagrams for explaining an example of a conventional manufacturing method for forming the connector contact shown in FIG. 10 is a schematic diagram for explaining the second stage, and Figures 11A and B show the third stage. 12 is a partially enlarged view showing a connector contact formed by the manufacturing method of the present invention; FIG. 13A is a sectional view taken along the line A-A in FIG. 12; Figure B is B-B in Figure 12.
13C is a sectional view taken along the line CC in FIG. 12. 140...Contactor for connector, 141...Contact part, 141B...Lead member for contact part, 141C
...Face bulge, 142...Crimping part, 142A...
Contact caulking part, 142B... Core wire caulking part, 14
2C...Coating caulking part, 143...Electric wire, 143
A... Core wire, 143B... Covered portion, 144A...
...Carrier, 144B...Cut section, 147...
Plating tank, 147A...Plating liquid, 149A...
Crimping die lower mold, 149B...Feeder, 149
C...Cutting punch, 149D...Crimping die upper mold.

Claims (1)

[Scope of Claims] 1 A series of crimping parts having a contact crimping part at the front end, a core crimping part at the center, and a covering crimping part at the rear end and connected by a reel-shaped carrier are formed, and continuous contact is formed. The tip of the lead member for the section is fed onto the contact caulking portion and the core wire caulking portion of one of the crimping portions using a feeder, the contact caulking portion is crimped against the tip of the lead member, and the lead member is A contact portion is cut at a predetermined distance from the contact caulking portion to form a contact portion that is crimped and held on the crimped portion, and thereafter this is repeated to form a series of contact portions that are crimped and held on a series of crimped portions. An end portion of the contact portion in which a part of the series of contact portions protruding forward from the crimping portion is subjected to plating treatment, and the exposed core wire of the terminal-treated electric wire is located in the core wire crimping portion of the crimping portion. The wire is placed against a series of crimping parts in such a way that the covering part of the wire end is located on the covering crimping part of the crimping part, and the core crimping part is placed on the contact part end. A method for manufacturing a contact for a connector, characterized in that the crimp portion is crimped to the sheathing portion of the wire and the core wire, and each of the crimp portions is separated from the reel-shaped carrier. . 2. Claim 1, in which a surface polishing process is applied to the tip of each contact portion before the plating process is performed.
A method for manufacturing a contactor for a connector as described in .