JPH0521265Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a modular plug that is attached to the end of a cable for easy connection to a telephone or electronic equipment.

[Conventional technology]

Recently, methods have been adopted in which, for example, a telephone set and an outside line cable, or a cable between a telephone set and a handset are simply connected using a modular plug and a modular jack.

The current wiring system using modular plugs in offices, etc. is to run the cable (single wire) from the main device to the location where the telephone is installed, and then connect the wire to the telephone via a modular jack-equipped rosette with a modular plug and jack. I'm here.
The cable exit from the main device is a solder terminal or U
It has a slit terminal structure, so when changing wiring etc., remove the cover of the main device,
It takes effort to change connections.

Therefore, there is a proposal to make the outlet from the main device modular, but the current modular plugs are not suitable for connecting single wires, and the current wires have high line resistance and cannot be used. Therefore, a modular plug that can connect single wires is desired.

As shown in FIGS. 6 and 7, this type of modular plug 100 has a plurality of blades 104 of a contact 103 protruding in parallel from the front end side 102 of one surface of an insulating housing 101, and the plurality of blades 104 are crimped with special pressure. It was crimped with a tool 107 and connected to the core wire 108 .

The contact 103 has a plate-like blade 104 on one end, a sharp cutting edge 105 on the other end, and is press-fitted into a narrow groove 106 on the tip end 102 of the contact 103. Since the cutting edge 105 is arranged parallel to the cable core wire 108, it can be used only for the core wire 108 made of a thread bundle wrapped with copper foil.

In addition, in this type of structure that the present applicant has previously developed and proposed, there is a wire lock that is a member for pushing the wire connected to the U-shaped slit terminal, and a member that holds the cable. Some devices are constructed from separate parts, and when assembled, a cable holding member, which is a separate member, is set after the cable is connected to the modular plug to hold and fix the cable.

[The problem that the idea aims to solve]

The structure developed by the applicant mentioned above uses separate parts to complete the cable and contact connection, and requires press-fitting and assembly work for each part. Moreover, since each component must be manufactured and controlled, the cost of the components is also high.

In this type of Utility Model Application Publication No. 131071/1980, the contact was merely held by the force of biting into the core wire and the holding groove. In addition, special public relations
No. 11677 fixed the terminal by pressing the pin into the hole, so it was susceptible to changes over time and could not avoid loosening due to vibrations, etc.

Therefore, the present invention has been improved in view of the above-mentioned problems, and its purpose is to provide a modular plug that can be installed without play and can reduce assembly work costs. shall be.

[Means to solve the problem]

The modular plug of the present invention has blades at one end extending in parallel from the convex portion of the insulating housing, an intermediate portion recessed from the blades and located in the central recess of the insulating housing, and a U-shaped groove slit. The contact block is provided with an elongated contact having a terminal erected from the other end, and the intermediate portion of the contact is attached by heating and welding a desired location in the central recess of the insulating housing, and the contact block is mounted in the central recess of the insulating housing. A wide area is formed corresponding to the desired area, and the intermediate part of the contact is held down by the contact block.

[Effect]

The contact is attached by fitting the bent contact into the insulating housing and heat-welding a desired location in the central recess of the insulating housing. Furthermore, after fitting the contact block from the upper center of the contact, the core wire is inserted. Further, when the contact block is pushed in, the welded portion is allowed to spread at the wide portion of the contact block, and at the same time, the contact itself is fixed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

FIG. 1 is a vertical sectional view of the entire modular plug, showing the state before connecting wires are connected to the U-slit terminals of the contacts. In the figure, reference numeral 1 denotes an insulating housing, which has a protrusion 2 for positioning the contact surface blade of the contact 6, a central recess 3 for fitting a contact block (described later), and a wire for connecting to the contact 6 (see Fig. 5 is a contact block that is fitted into the central recess 3 of the insulating housing 1 to position and fix the contact 6. do. As shown in the figure, the contact block 6 has a presser portion 5.
a is protruding.

As will be described later, this contact 6 is melted and fixed at a wide portion D that allows escape during welding. 7
is a hole formed in the contact block 5 into which the slit terminal 8 of the contact 6 is inserted;
This is for guiding and inserting the end of the slit terminal 8 when the contact block 5 is press-fitted. Reference numeral 9 denotes a hole into which a core wire of a wire (distribution cable) not shown is inserted, and with the core wire inserted into the hole 9, the contact block 5 is press-fitted and connected to the contact 6. 10 is a cable insertion part for guiding and holding a wiring cable (not shown); 11
is a retainer formed in a wave shape on its inner surface.
Further, reference numeral 12 designates a presser block connected to the contact block 5 via a thin hinge 13, and is fitted into the cable insertion portion 10 with a claw 14.

FIG. 2 is a partially sectional plan view, and the same reference numerals as in FIG. 1 indicate the same parts.

3 is a view of the insulating housing 1 viewed from the direction of arrow A, and four contacts 6 are disposed in the grooves of the insulating housing 1. As shown in FIG.

FIG. 4 is a front view of the contact block, and in the figure, the width D of the part where the contacts are press-fitted and fixed is made wide, so that when the contacts 6 are welded, the spread of the welded part is released. It is for.

Further, FIG. 5 is an exploded perspective view of each component shown in FIGS. 1 to 4, and the assembly procedure will be explained with reference to this figure. The insulating housing 1 and the contact block 5, which are integrally molded from an insulating material, have the shapes shown in the figure, and the contacts 6 are set by pushing them into the grooves of the insulating housing 1, with the contact carriers 15 still attached. . After that,
The parts B and C are fixed to the insulating housing body by heat welding. As shown in the figure, the welded parts of parts B and C slightly protrude. Then, the contact carrier 15 is folded at the notch at the C portion and removed.

After that, the cable is attached along the cable insertion part 10, and the core wire is inserted into the hole 9 of the contact block 5 and press-fitted, whereby the core wire is press-fitted and connected to the slit terminal 8 of each contact, and the cable is completed. do. At this time, even if a relief occurs in the C portion due to heat welding, it is allowed by the width dimension D of the contact block 6. In the figure, 16 is a protrusion on the contact block 5, and a groove 17 on the insulating housing 1.
It fits into the Further, 18 is a positioning protrusion, and 19 is a receiving groove thereof.

Thus, according to this embodiment, the contact 6
and a contact block 5 for connecting the core wire.
The wire (outer sheath) is fixed to the insulating housing by welding at the different width points of the insulating housing.
Moreover, since the contacts 6 are fixed by the contact blocks 5, there is no backlash in the contacts 6 in the vertical and horizontal directions, the number of parts required is reduced, and the assembly work is simplified.

[Effect of the invention] According to the invention, a contact having a blade at one end and a slit terminal at the other end can be attached by heat welding at the intermediate part, and at the same time, it can be press-fitted with the presser part of the contact block and the contact can be attached at the intermediate part by heat welding. It was possible to securely fix the entire area without any looseness, and it was possible to prevent loosening due to aging, vibration, etc. In particular, the widening of the welded area due to heat welding can be absorbed by the wide area of the holding part of the contact block, so tight fixation can be achieved. Moreover, the connection can be easily made by pushing in the contact block, reducing the number of work steps.

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams for explaining one embodiment of the modular plug according to the present invention.
Figure 2 is a partial cross-sectional plan view, Figure 3 is a partial front view of the modular plug, Figure 4 is a front view of the contact block, Figure 5 is a front view of the contact block.
The figure is an exploded perspective view of a modular plug, Figure 6 is a vertical sectional view of a conventional modular plug, and Figure 7 is a vertical sectional view of a modular plug after assembly and connection are completed.
FIG. 8 is a front view of a conventional contact. DESCRIPTION OF SYMBOLS 1...Insulating housing, 2...Convex part, 3...Central recessed part, 4...Outer covering holding block, 5...Contact block, 5a... Holding part, 6...Contact, 6a...Intermediate part of contact , 7...hole, 8
... Slit terminal, 9 ... Hole, 10 ... Cable insertion part, 11 ... Retainer, 12 ... Presser block, 15 ... Contact carrier, B section, C section ...
...Welded area, D part...Wide area.

Claims (1)

[Claims for Utility Model Registration] Blades at one end extending out in parallel from the convex portion of the insulating housing, an intermediate portion recessed from the blade and located in the central concave portion of the insulating housing, and further comprising a U-shaped groove. A contact block is provided with an elongated contact having a slit terminal erected from the other end, the intermediate part of the contact is attached by heating the welding part in the central recess of the insulating housing, and the contact block is mounted in the central recess of the insulating housing. A modular plug characterized in that a wide part is formed in the holding part to correspond to the welding part, and a middle part of the contact is held down by a contact block.