JPH0720856Y2 - Module plug for single wire connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a modular plug attached to a cable end for easy connection with a telephone or electronic equipment.

[Prior Art] Recently, for example, a system has been adopted in which a telephone and a cable are simply connected by a so-called modular jack and a modular plug. As shown in FIG. 8, the modular plug 100 of this type has a contact from one surface of the insulating housing 101.
A plurality of blades 102, 103 .. are projected side by side, and a cutting edge 104 is formed inside, and this cutting edge 104 is a cable core 108.
The cutting edge was placed parallel to.

In addition, the outer presser foot 106 faces the wire introduction port 105 and the thin hinge 107
Are connected by.

[Problems to be Solved by the Invention] The cutting edge 104 can bite into the core wire 108 or stranded wire formed by winding copper foil, but cannot connect to a single wire because the cutting edge 104 cannot bite into it. It was a thing.

In order to connect a single wire, a terminal with a U-shaped groove was pushed in from the outer diameter part of the single wire in an intersecting state with respect to the axial direction to connect, but in the drawing direction of the single wire, the terminal plate thickness It could only be held, and there was a risk that the cable could come off from the connection point and result in a poor connection. In actual use, the cable may be grasped and pulled out from the modular jack, but such handling may cause the cable to be pulled out. In this case, even if the outer cover pressing member 106 is applied, it cannot be pressed because it cannot be inverted.

In addition, since the cable pulled out from the wire introduction port 106 is bent and pressed, an early breakage occurs.

Here, the modular plug of Japanese Utility Model No. 57-161872 has a protective tube attached to the wire introduction port, but it is a technology that is practically applied only to twisted wires and requires a retaining structure. Absent. The conductor protection tube of No. Shokai 60-193678 is also a protection tube of the same type attached to the wire inlet, and does not have a retaining structure inside. In addition, the actual development Sho 53-4786
No. 6 provides a retainer in the latter half of the socket body itself, and none of them could predict the technology for incorporating the retainer structure in the protective tube.

The present invention has been developed in view of the above circumstances, and an object thereof is to provide a modular plug capable of protecting a cable connection point without dropping.

[Construction of the Invention] In order to achieve the above-mentioned object, the present invention has blades of contacts exposed in parallel from one surface of an insulating housing, and a slit terminal having a U-shaped groove is formed on the contact on the other surface of the insulating housing. A cable holder is attached to the wire inlet through a clip member having claws at both ends in the axial direction.
The inner surface of the cable holder is formed into a tapered surface portion, and a chuck member having a tapered surface on the outer surface and adapted to chuck a cable is inserted in the tapered surface portion.

[Operation of the device] Insert the cable from the wire inlet of the insulating housing,
Connect the U-shaped terminal to the single conductor of the cable. Then, attach the chuck to the cable in the vicinity of the wire insertion port. Since the chuck is held in the cable holder so that it can be chucked, the cable holder may be integrally attached to the insulating housing.

[One Embodiment of the Invention] The drawings show one embodiment of a modular plug for single wire connection according to the present invention, and a modular plug for a four-core cable is illustrated.

The modular plug includes an insulating housing 1 having a substantially rectangular shape,
A mounting groove 10 is formed on one surface of the insulating housing 1, and contacts 2, 3 are provided in the mounting groove 10, a contact lock 4 for locking the contact 2, and a wire lock 5 for pushing and connecting the cable C to the slit terminals 20, 30. Is equipped with. In addition, the insulating housing 1 is integrally formed with the additional portion 6 that is widened from the middle portion to the rear side, and the cable holder 7 is provided in the receiving portion 60 at the end portion of the additional portion.
Is installed.

More specifically, the mounting groove 10 on one surface of the insulating housing 1 has a thin slot-shaped contact holding groove 11 on the front end side, a wide contact lock mounting groove 12 on the intermediate portion, and a rear side adjacent to this. Further, a wide wire lock mounting groove 13 is formed in series. The contact holding groove 11 has contacts 2,
A plurality of blades 21 and 31 of the contacts 2 and 3 having a narrow width capable of inserting 3 are arranged side by side through the partition wall 14 and are configured to be capable of protruding from the surface of the partition wall 14. Further, lock locking grooves 15 and 16 are provided on the side walls of the grooves 12 and 13, respectively, and the lock locking groove 1 and
6 is vertically long. Reference numeral 17 in the figure denotes an elastic piece that is inclined rearward from the tip side of the other surface.

As shown in FIG. 1, the contacts 2 and 3 have a substantially L shape in which the plate thickness is bent, and blades 21 and 31 are projected on the lower end surface of the plate thickness of the straight part, and the contact lock 4 is formed in the middle part. The holding pieces 22 and 32 of the wire lock 5 are formed on the rear side of the wire lock 5. Further, slit terminals 20 and 30 are formed through necks 24 and 34 at the portions that are bent in the L shape and are orthogonal to the cable axis direction. The slit terminals 20 and 30 are arranged in a staggered manner as shown in FIG. 3 by making the lengths of the inner and outer straight portions different, and formed to have a width as required. The contact 3 arranged on the outer side has a wire lock hold piece portion 33 bent outward through a bent portion 35. In the figure, 25, 26, 36 and 37 are narrow width portions inside the fishing portions of the contacts 2 and 3, respectively.

Further, in the contact lock 4 described above, the holding grooves 41 .. for holding the contact hold pieces 22, 32 are provided in parallel on the mountain portion 40, and the bottom surface 42 of the holding grooves 41 .. Can be formed on substantially the same surface. Expanded guide portions 44, 44 are formed on the upper portion of the holding groove 41. Further, locking projections 45, 45 that engage with the locking locking grooves 15, 15 are formed on both side surfaces of the contact lock 4. 46 is a hollow portion of the lower surface of the contact lock.

Furthermore, the wire lock 5 described above is formed with L-shaped zigzag holding grooves 50, 51 .. so that the holding pieces 23, 33 of the contacts 2, 3 and the slit terminals 20, 30 can be received. . Tapered portions 52 .. are formed on the upper portions of the holding grooves 50, 51. A core wire insertion hole 53 is provided in the holding groove 51 from the rear side of the wire lock 5 in an intersecting state. 54 is an insertion guide hole, 55 is an upper locking ridge that engages with the lower position of the lock engagement groove 16 at the temporary fixing position, and 56 is an engagement ridge that engages with the lower position of the groove 16 at the wire lock position. is there.

Further, the receiving portion 60 at the end portion of the additional portion 6 has a wire insertion opening 61 capable of receiving the cable holder 7, and has a hook groove portion 62 over the outer circumference thereof. 63 is a meat escape portion at the center of the other surface.

On the other hand, the cable holder 7 can be composed of the hood member 70, the chuck member 8 and the clip member 9. The hood member 70 has a trumpet shape capable of inserting a cable, is provided with a tubular portion 71 that can be fitted into the wire insertion opening 61, and a collar 72 that follows the tubular portion 71.
Equipped with 3,73. Substantially parallel hole surface portions 74, 74 are formed between the tapered hole surface portions 73, 73, and a cable outer diameter insertion hole portion 74 is formed following these hole surface portions 73, 73.

The hole surface portions 73 and 74 are configured to be able to receive the chuck member 8 that holds the cable. The chuck member 8 is composed of a plurality of chucks 80, 80. The chuck 80 has a wire insertion groove 81 inside and a taper portion 82 outside.
Cable retention projections 83 .. project axially from the wire insertion groove 81. As shown in the drawing, the chucks 80, 80 may be resin-molded and connected by a thin hinge 84.

Furthermore, the clip member 9 has a tubular shape with a cut,
Claws 90., 91. are provided at both ends in the axial direction.

In the assembly of the above-described structure, first, the contacts 2 and 3 are inserted into the contact mounting groove 10 of the insulating housing 1 and inserted. Since the contact holding groove 11 .. is approximately the same as the plate thickness of the contacts 2 and 3, the blades 21 and 31 are arranged in a row in the contact holding groove 11 ..

After that, attach the contact lock 4 to the contact lock mounting groove.
When pushed into 12, the holding piece portions 22 and 32 are engaged with the holding groove 41 from the guide portion 44 of the mountain portion 40, and the lower ends of the plate thicknesses of the holding piece portions 22 and 32 are the holding groove bottom surface 42 and the rear half portion 43. The locking projection 45 is engaged with the lock locking groove 15 and locked in a state of abutting against. At the time of pushing, a normal tool such as pliers or a member may be inserted into the hollow portion 46 and pushed.

Further, in the exposed state in which the wire lock 5 is pushed into the wire lock mounting groove 13, the upper locking projection 55 is engaged with the lower position of the lock locking groove 13 and temporarily fixed, and the core wire insertion hole 53 is It is located below the groove of the slit terminal 20.

At the time of use, if the hood member 70 is inserted through the cable C and the cable core wire c is inserted from the core wire guide hole 54 to the core wire insertion hole 53, it is positioned below the slit terminal 20 in an intersecting state. . Therefore, if the protruding portion of the wire lock 5 is pressed with a normal tool, the core wire c is pushed into the U-shaped groove of the slit terminal 20 while being held in the core wire insertion hole 53,
Breaking the coating leads to connection. In the connected state, the locking projection 56 engages with the lock locking groove 16 to be in the locked state.

After that, the cable C is put in the wire insertion groove 81 of the one chuck 80, the pair of chucks 80, 80 are combined through the thin hinge 84, and then the hood member 70 is pulled toward the chuck member 8.
At that time, the tapered portions 82, 82 of the chuck member 8 are pushed in the axial direction so that the tapered portions 82, 82 are chucked by the tapered hole surface portions 73, 73, and the tubular portion 71 of the hood member 70 is fitted into the wire insertion opening 61.
As a result, the cable C is clamped by the retaining projections 83 .. of the chuck member 8 on both sides or in the axial direction.

Next, the clip member 9 is opened from the slit and the nail portion on one side is opened.
91. is engaged with the groove 62, and the other side claw 9
2. The cable holder 7 is integrated by engaging the. With the outside of the collar 72.

As described above, according to the above-described embodiment, the following effects can be obtained.

By attaching the cable holder 7 to the cable connecting portion to the modular plug, it is possible to prevent the cable C from being bent. In this case, if the hood member 70 is resin-molded, the bending of the cable C is absorbed by the elasticity of the resin.

Since the chuck member 8 is retracted in the axial direction, the slit terminal 20 that intersects in the axial direction is prevented from being pulled out or damaged.

In the above-mentioned one embodiment, the 4-core type is illustrated, but the multi-core type as well as the 2-core type may be implemented.

Also, the clip member 9'is, as shown in FIG.
And the holding pieces 94, 94 can be formed into a U-shape having an opening 95, and claw portions 96 to 98 are provided on both sides in the axial direction of the holding pieces 94, 94 and the opening 95.

According to the above configuration, when the hood member 70 is fitted in the additional portion 6, the clip member 9'is pushed through the opening 95 from the side surfaces of these 6, 70, so that the claw portions 96, 97 integrate the two. At the same time, the claw portion 98 prevents the clip member 9'from falling off.

[Effects of the Invention] As described above, the modular plug for connecting a single wire according to the present invention has the following effects.

Even if the single core wire of the cable inserted from the wire inlet of the insulating housing that exposes the blade is connected with the U-shaped slit terminal, the cable can be removed by installing the cable holder integrally with the wire inlet. It was possible to provide a modular plug capable of preventing the above.

By attaching the cable holder to the wire introduction port of the modular plug, it is possible to prevent bending and bending of the cable having the single core wire along the axial direction.

A chuck retaining structure using the taper inner surface of the cable holder itself could be realized, and retaining in a compact size of the cable holder could be realized. Moreover, the cable holder with the chuck can be added very easily by the claw portion of the clip member.

[Brief description of drawings]

The drawing shows an embodiment of the modular plug according to the present invention,
1 is an exploded perspective view of the same, FIG. 2 is an overall vertical cross-sectional view of a connected state, FIG. 3 is a rear view of an insulating housing with contacts inserted, FIG. 4 is a cross-sectional view of a hood member, and FIG. The same side view, FIG. 6 are transverse sectional views in a chucked state, FIG. 7 is a perspective view showing another example of a clip member, and FIG. 8 is a sectional view of a conventional modular plug. 1 ... Insulating housing, 2, 3 ... Contact, 4 ... Contact lock, 5 ... Wire lock, 6 ... Additional part,
7 ... Cable holder, 8 ... Chuck member, 9, 9 '...
… Clip member, 10… Mounting groove, 14… Partition, 20,30…
… Slit terminal, 21,31 …… Blade, 22,23,32,33 ……
Hold piece part, 40 …… Mountain part, 41,50,51 …… Holding groove, 60…
… Receiving part, 61 …… Opening part, 70 …… Hood member, 73 …… Taper hole surface part, 80 …… Chuck, 82 …… Taper part.

Claims (1)

[Scope of utility model registration request] 1. A blade of a contact is exposed in parallel from one surface of an insulating housing, and a slit terminal having a U-shaped groove is provided in the contact so as to intersect with each other in a wire introduction port on the other surface of the insulating housing. A cable holder is attached to the wire inlet through a clip member having claws at both ends in the axial direction, the inner surface of the cable holder is formed into a tapered surface portion, and the tapered surface portion is tapered to an outer surface. A modular plug for connecting a single wire, wherein a chuck member having a surface for chucking a cable is inserted.