JPH0716295Y2 - Modular plug - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a signal cable, in particular, a modular cord made up of a large number of wires, and in particular, a modular cord having a circular cross section and electronic equipment such as a telephone and a computer. The present invention relates to an improvement of a cable fixing device, that is, a modular plug used for a connecting portion of a cable.

[Conventional technology]

Recently, a method of transmitting various kinds of information to electronic devices such as facsimiles, word processors, and computers using a telephone line has been adopted, but generally, it is used for connecting signal cables to telephones and computers. The connection structure is a combination of a modular plug and a modular jack.

This modular plug body is a small one that is molded from transparent synthetic resin, and the end of the signal cable that contains multiple wires, for example, 2, 4, 6, and 8 wires, is stripped off. The wire is exposed, and this is pushed into the modular plug body, and then the blade contact inserted in the modular plug body is pressed to make an electrical connection between the wire and this blade contact, and at the same time, the signal cable The modular plug body is fixed to the tip.

The general connection work between this signal cable and the modular plug body is to cut off the sheath (sheath) at the end of the signal cable, arrange the individual separated wires in parallel and push them into the modular plug body, and then contact the blade contact. Is pressed, and the coating of each element wire is pierced at the tip of the blade contact to electrically connect to the terminal.

[Problems to be solved by the device]

Now, when fixing a signal cable consisting of multiple wires with a flat cross section to the modular plug body, the sheath at the end of the signal cable is cut off, but even in this state the wires are arranged in parallel. , Without causing too much disturbance,
The order of the arrays does not change.

On the other hand, in the case of a signal cable having a round cross section, the bare wires are arranged in the circumferential direction, and therefore, if the sheath of the bare wires is cut off, the exposed bare wires are separated. It is necessary to arrange these wires in a straight line or in parallel and insert them into the modular plug body and fix them, but since the wires are originally arranged in the circumferential direction and have a habit, these wires are straight lines. Even if it is put into a state, it can easily return to its original state, lose its directionality, and cause the arrangement order to be incorrect.

When a plurality of strands of which the arrangement is not constant are held by the fingertips and inserted into the openings of the modular plug body, the strands may not be inserted into a predetermined position. In this state, it is necessary to pull out the tips of the signal cables from the modular plug body, realign them, and perform the same insertion work as described above, which makes the work of fixing the modular plug body complicated.

In this case, when the number of strands is small, the work is relatively easy, but when the number of wires is 6 or 8, the work becomes very complicated and the assembly workability is significantly deteriorated.

The present invention provides a signal cable fixing tool capable of surely inserting wires into a predetermined position in a predetermined order when a signal cable, particularly a signal cable having a circular cross section, is attached to the conventional modular plug body. That is, it provides a modular plug.

[Means for Solving the Problems] The present invention for achieving the above-mentioned object includes a sleeve having a holding hole into which a wire of a signal cable is inserted, and an end portion of the signal cable in which the sleeve is fitted, A modular plug comprising: a modular plug body having a hole capable of guiding the end of the wire at a position where a blade contact protrudes; and the sleeve is a synthetic resin molded body having a height on the outer surface thereof. Form a tapered surface that is reduced in the insertion direction, and the inner wall of the inlet portion of the holding hole has a substantially rectangular cross section, and its height is made larger than the diameter of the strand, and the upper and lower sides of the holding hole on the outlet side are formed. On the inner wall surface, a plurality of grooves each having a circular arc cross section are provided in parallel in the insertion direction to form a holding portion having a gourd cross section between the upper and lower grooves, and the diameter of the holding portion is larger than the diameter of the strand. Rather small The modular plug body has an inclined surface formed on the inner wall surface at the back of the inlet portion so as to match the outer surface of the sleeve. In addition, the modular plug is configured so that the blade contact is further projected into the depth of the inclined surface.

[Action]

The bare wires exposed by peeling off a part of the sheath of the signal cable are supported in a straight or parallel manner by the sleeve, and are integrated and reinforced, so they are aligned in a flat state. In addition, the mounting work to the modular plug body can be performed quickly and reliably.

〔Example〕

Next, an embodiment of the communication cable fixture of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a modular plug 2 provided at an end of a signal cable 1 composed of a plurality of strands 1a. The modular plug 2 is composed of a modular plug body 3 and a sleeve 4 in combination. Has been done.

The signal cable to which the present invention is applied preferably has a circular cross section, but a flat cable can also be used in the same manner.

The modular plug body 3 may be a standard product that has been conventionally used, or a product obtained by slightly modifying the design of the standard product.

The sleeve 4 is a member applied in the present invention,
The structure is formed as shown in FIGS. 4 to 7. This sleeve 4 is a molded body of a transparent synthetic resin such as styrene, has a rectangular shape in the plan view of FIG. 5, and has a tapered surface T formed on the outer surface as shown in the side view of FIG. The front is reduced.

The shape of the side surface of this sleeve 4 makes it easy to insert the sleeve into the hole 3a of the modular plug body 3, and further, this hole 3a
The inclined surface T'formed in the inside of the wire presses the sleeve 4 accurately for positioning, and the sleeve 4 presses the strand 1a.
(Incidentally, in the drawing, the conducting wire and the coating thereof are shown by hatching together.) And the sleeve 4 has the meaning of improving the connection state.

A holding hole 4a into which the strand 1a is inserted is opened at the center of the sleeve 4 in the longitudinal direction. The holding hole 4a has an inlet portion 4b having a substantially rectangular cross section as shown in FIG. The height H is formed to be larger than the diameter of the strand 1a (Fig. 1), and a gourd-shaped holding portion 4c is formed in the outlet direction through a reduced portion 4b 'which is reduced in the insertion direction.

In this embodiment, the holding portion 4c has six strands 1a.
Since it is a book, six grooves 4e are formed in parallel with each other on the upper and lower inner wall surfaces on the outlet side in the insertion direction, and six holding portions 4c are formed at a constant pitch between the upper and lower grooves 4e. As a specific shape of the holding portion 4c, as shown in FIG. 7, a plurality of circles are arranged linearly with their diameter portions in contact with each other, and the meat at the confluent portion is cut off. The diameter D of this circle is made slightly smaller than the outer shape of the strand 1a so that a plurality of strands 1a can be reliably held.

When the signal cable 1 is attached to the modular plug 2, a part of the sheath 1b of the signal cable 1 is peeled off to expose the wire 1a, and the sleeve 4 is attached to the root of the exposed portion with a sixth
Insert in the direction of arrow C in the figure, and the tip surface 4d of this sleeve 4
The strand 1a is further projected. In this state, the modular plug body 3 is pushed into the hole 3a and the tip of the wire 1a is inserted into the hole where the blade contact 3b is pressed and protrudes. Then, the blade contact 3b is pressed to connect the strand 1a to the modular plug body 3. In addition, in the hole 3a of the modular plug body 3, a groove 5 having an arcuate cross section (Fig. 2) is formed.
Is formed, and the groove 5 having an arcuate cross section is configured to receive the sheath 1b of the signal cable 1.

When the modular plug 2 of the present invention and the signal cable 1 are joined, a part of the sheath 1b at the end of the signal cable 1 is stripped off, and the exposed wires 1a are arranged in a flat state. 1a is inserted into the holding hole 4a of the sleeve 4 in a predetermined order.

Then, the signal cable 1 with the sleeve 4 is inserted into the hole 3a of the modular plug body 3. And the blade contact press-fitted into this modular plug body 3
3b is pressure-welded and the coating of the wire 1a is pierced at its tip to establish an electrical connection between the blade contact 3b and the wire 1a, that is, the signal cable 1.

[Effect of device]

A modular plug, which is an end connector of a signal cable according to the present invention, accommodates a sleeve having a holding hole into which a wire of a signal cable is inserted and an end of the signal cable into which the sleeve is fitted. A modular plug comprising a modular plug body having a hole for guiding the end portion at a position where a blade contact projects, wherein the sleeve is a molded body of synthetic resin, the height of which is on the outer surface in the insertion direction. A reduced tapered surface is formed, and the inner wall of the inlet of the holding hole has a substantially rectangular cross section, and its height is made larger than the diameter of the wire, and the upper and lower inner wall surfaces on the outlet side of the holding hole are formed. A plurality of parallel grooves each having an arcuate cross section in the insertion direction to form a holding portion between the upper and lower grooves, and the diameter of the holding portion is formed to be slightly smaller than the diameter of the wire. The contracting portion that contracts in the insertion direction is made to communicate between the portion and the holding portion, and the hole of the modular plug body forms an inclined surface that matches the outer surface of the sleeve on the inner wall surface at the back of the inlet portion. The blade contact is configured to protrude into the back of the inclined surface, and the following effects can be obtained.

The sheath at the end of the signal cable 1 is peeled off in advance to expose a plurality of strands 1a, and then the strand 1a is passed through the holding hole 4a of the sleeve 4 to the end of the signal cable 1 at the sleeve 4
By attaching the, the wire 1a can be positioned in a flat state and in a predetermined order.

And a plurality of strands 1a held flat by the sleeve 4
Can be electrically connected by pushing the blade contact 3b into the hole 3a of the modular plug body 3 so that the signal cable 1 and the modular plug body 3 can be efficiently connected and the arrangement order of the wires 1a can be improved. You can do it without making a mistake.

The modular plug fixed to the end of the signal cable according to the present invention can be effectively applied to a signal cable having a round cross section, but can also be effectively applied to a signal cable having a flat cross section.

Further, in the sleeve, the inlet portion has a substantially rectangular cross-section that is larger than the diameter of the wire, and communicates with the holding portion on the outlet side through a contracting portion that is provided at the back and reduces in the insertion direction. The bare wire with the cable sheath removed can be inserted very easily into the entrance, and at the same time it is guided to the reduced section,
It is possible to easily and surely guide to a predetermined holding portion.

Moreover, since this inlet was opened in a substantially rectangular cross section and larger than the diameter of the strand, the sheathed stripped signal cable with round cross-section was expanded to ensure that the multiple strands with different heights are firmly attached to the sheath. Can be inserted up to the entrance. Since the sleeve is a molded body made of synthetic resin and the diameter of the holding part is made slightly smaller than the diameter of the wire, when the wire is pushed through the holding part, the holding part is fitted from above and below to form a plurality of wires. Will be clamped in an aligned state with a constant pitch. Therefore, when inserting the wire fitted with the sleeve into the hole of the modular plug body, the holding position of the wire does not shift or come off, and the aligned state of the wire with a constant pitch can be maintained.

Furthermore, since the outer surface of the sleeve is formed with a tapered surface whose height is reduced in the insertion direction, the sleeve can be inserted into the hole of the modular plug body very easily.

On the other hand, since the inclined surface is also formed in the hole of the modular plug body, the inclined surface and the taper surface of the sleeve contact each other,
The sleeve is accurately positioned, and the inclined surface presses the sleeve to further strengthen the fitting between the holding portion and the wire.
Therefore, the tip of the wire can be correctly guided to the protruding position of the blade contact while maintaining a constant pitch, and the pressure contact of the blade contact can be reliably received, resulting in poor electrical continuity between the wire and the blade contact. There is nothing to do. In addition, since the end of the signal cable is integrally connected to the modular plug body through the sleeve without wobbling, it is possible to completely prevent the occurrence of a failure such as a subsequent defective conduction between the blade contact and the wire. .

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 1 is a sectional view of a modular plug fixed to the end of a signal cable,
2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a plan view of the same. FIG. 4 is a front view of the sleeve, FIG. 5 is a plan view of the same, FIG. 6 is a side view of the same, and FIG. 7 is an enlarged view of a holding hole for the wire. 1 ... Signal cable, 1a ... strand 1b ... sheath, 2 ... modular plug 3 ... modular plug body 3a ... hole, 3b ... blade contact 4 ... sleeve, 4a ... holding hole 4b ... entrance part, 4b '... reduction part, 4c ... Holding part 4d ... Tip surface, 4e, 5 ... Groove, D ... Diameter, H ... Height, T ... Tapered surface, T '... Inclined surface.

Claims (1)

[Scope of utility model registration request] 1. A wire (1) for accommodating a sleeve (4) having a holding hole (4a) into which a wire (1a) of a signal cable (1) is inserted, and an end portion of the signal cable fitted with the sleeve. A modular plug (2) comprising a modular plug body (3) having a hole (3a) capable of guiding the end portion of the blade to a position where the blade contact (3b) projects, the sleeve being a molded body of synthetic resin. A taper surface (T) whose height is reduced in the insertion direction is formed on the outer surface of the holding hole, and the inner wall of the inlet portion (4b) of the holding hole is formed into a substantially rectangular shape and its height (H ) Is larger than the diameter of the wire, and a plurality of grooves (4e) with arcuate cross sections are provided in parallel in the upper and lower inner wall surfaces on the outlet side of the holding hole in the insertion direction and held between the upper and lower grooves. The diameter (D) of the holding part is formed while forming the part (4c). It is formed to be slightly smaller than the diameter, and the inlet part and the holding part are communicated with each other by a reducing part (4b ′) that reduces in the insertion direction. A modular plug formed by forming an inclined surface (T ') matching the surface and further projecting a blade contact into the back of the inclined surface.