JP2007200785A - Modular plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a modular plug in which reduction of performance such as outbreak of noises and slipping-off of a boots can be prevented surely. <P>SOLUTION: This modular plug P has the boots 1, a housing 2, a separator 3, a management bar 4, and a connection terminal 5. Respective locking pieces 1c of the boots 1 is inserted into the housing 2, and a first locking part 1d is formed at that tip. The separator 3 includes a cross-sectionally nearly U-shaped first guide part 3c consisting of a first rear face 3a and a pair of first opening faces 3b, a cross-sectionally nearly U-shaped second guide part 3f consisting of a second rear face 3d and a pair of second opening faces 3f, and a coupling part 3g to couple intermediate parts of a first rear face 3a and intermediate parts of a second rear face 3d. Core wire fixing stoppers 7 are formed at the tip part of a pair of the first opening faces 3b, at the tip part of a pair of the second opening faces 3e, and at both end parts where the first rear face 3a and the second rear face 3d are opposing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a modular plug that holds a cable formed by covering a plurality of core wires and is electrically connected by being inserted into a modular jack, and in particular, a twisted pair cable in which two core wires are twisted together as a set. It relates to a modular plug applied to.

  Generally, a modular plug is a connector member used for connecting a core wire in a cable used for a telephone, a LAN (local area network), etc., and connecting it to a modular jack of the apparatus main body.

  On the other hand, when an alternating magnetic field acts on the electric wire, current flows due to electromagnetic induction, causing noise. Therefore, in order to prevent the occurrence of noise, a twisted pair cable formed by twisting two core wires as a pair and covering the outside with a sheath made of an insulator is used in a LAN cable or the like. It is often done.

  In such a modular plug for a twisted pair cable, for example, a separator is used in order to avoid interference between core wires.

  FIG. 5 is a front sectional view showing an example of a separator used in a conventional modular plug. As shown in FIG. 5, a separator 50 used in a conventional modular plug includes a first horizontal portion 50a and a first vertical portion 50b, and a first guide portion 50c formed in a substantially L-shaped cross section. A second guide portion 50f formed of a second horizontal portion 50d and a second vertical portion 50e and having a substantially L-shaped cross section, and an intermediate portion between the first vertical portion 50b and the second vertical portion. It consists of the connection part 50g connected in the middle of 50e.

  When assembling the modular plug, the sheath at the tip of the cable is peeled off, the inner core wire is untwisted, and then each core wire is inserted into the separator according to a predetermined connection method. At that time, the first set of two core wires S1 and S2 are arranged in the first guide portion 50c, the second set of two core wires S3 and S4 are arranged in the second guide portion 50f, and the connecting portion 50g. The third set of two core wires S5 and S6 are arranged at the upper part of the second part, and the fourth set of two core wires S7 and S8 are arranged at the lower part of the connecting part.

  The first set of two core wires S1 and S2 and the second set of two core wires S3 and S4 are arranged in a horizontal state with a twist left in order to prevent noise, and the third set of two core wires S3 and S4. The core wires S5 and S6 and the fourth set of two core wires S7 and S8 are arranged in a staggered manner (hereinafter, this technique is referred to as Conventional Example 1).

Japanese Patent Laid-Open No. 2003-264026 (Patent Document 1) has an eaves that bends and extends forward at the upper portion of the box-shaped portion having an insertion port through which the cable passes. Two locking projections are provided at the front end from the outer peripheral edge of the opening of the insertion port, the locking projection has a triangular cut, and the rear end of the box-shaped part is a cylindrical shape having a number of windows. A protector for a modular plug in which a cable guide portion is extended has been proposed (hereinafter, this technique is referred to as Conventional Example 2).
JP 2003-264026 A

  In Conventional Example 1, the third set of the two core wires S5 and S6 and the fourth set of the two core wires S7 and S8 are arranged in different stages, so that the outer core wires S5 and S8 do not fit in the separator 50. It rises outside the separator 50. For this reason, when the separator 50 is disposed in the housing, the outer core wire is pressed against the inner wall of the housing, and thus there is a problem in that it tends to cause performance degradation such as generation of noise.

  Moreover, in the conventional separator 50, since the space which guides core wire S1-S8 is open | released, it was difficult to fix core wire S1-S8 within the separator 50. FIG. For this reason, it takes time to arrange the cores S1 to S8 in a line when they are inserted into the management bar, and there is a problem that the workability of the assembly deteriorates.

In Conventional Example 2, a locking projection is provided at the front end of the box-shaped portion, and a notch that is locked to the hook-shaped portion of the housing is formed in each locking projection. However, since it is necessary to provide some clearance for inserting the locking projections of the box-shaped portion in the housing, the hook-shaped portion can sufficiently cut the locking projections depending on the angle at the time of crimping the hook-shaped portion of the housing. There was a problem that it could not enter, and it was easy to cause the boots to fall out.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a modular plug that can prevent performance degradation such as generation of noise and can prevent the boot from coming off.

  The modular plug according to the present invention is a modular plug that holds a cable formed by covering a plurality of core wires and is electrically connected by being inserted into a modular jack, and a first cable insertion portion for inserting the cable is formed. And a housing formed with a second cable insertion portion that is locked to the boot and into which the cable is inserted, and a core wire insertion portion into which a plurality of core wires that are exposed by removing the coating of the cable are inserted. A separator that is disposed in the core wire insertion portion of the housing and separates the plurality of core wires into a set, and is attached to a distal end portion of the housing and connected to the core wires separated by the separator. A first guide portion having a substantially U-shaped cross section comprising a first back surface and a pair of first open surfaces. A second guide portion having a substantially U-shaped cross section composed of a second back surface and a pair of second open surfaces, an intermediate portion between the first back surface of the first guide portion and the second guide portion second. A connecting portion that connects the middle of the back surfaces of the pair of first open surfaces, the front end portions that face each other, the front end portions that face the pair of second open surfaces, the first back surface, and the second back surface The opposite ends of each are formed with core wire fixing stoppers for fixing the arranged core wires.

  A second locking portion for locking the cable inserted into the second cable insertion portion is formed in the housing, and the boot is inserted into the housing, and the first locking portion is The formed locking piece is attached, and the second locking portion of the housing is pushed and bent, so that the surface of the cable is bitten and locked to the first locking portion of the boot locking piece. It is preferable that the housing is fixed to the boot.

  You may further have the management bar arrange | positioned in the core wire insertion part of the said housing, and aligning the core wire isolate | separated by the said separator in a parallel state.

  The modular plug of the present invention has the following excellent effects.

  (1) Since the core wires can be placed in the first guide portion and the second guide portion of the separator while leaving the twists, and the twisted core wires can be placed at the upper and lower portions of the connecting portion, each core wire can be arranged in a row. Arranging work becomes easy, and assembling workability is improved.

  (2) Since the core wire fixing stopper is formed on the separator, the arrangement position of the core wire is fixed, and the rise of the arranged core wire and the tension of the core wire can be suppressed as much as possible. This facilitates the work of arranging the core wires in a line when inserted into the management bar, and improves the assembly workability.

  (3) Since the core wire fixing stopper can store all the core wires in the separator, the core wire does not partially swell. Therefore, no pressing force is applied to the core wire S by the inner wall of the housing when inserted into the housing, and performance degradation such as generation of noise can be prevented.

  (4) Since the second locking portion of the housing is pushed and bent, the first locking portion of the locking piece of the boot is locked to the first locking portion of the locking piece of the boot. It can be designed to fully contact the inner wall. Therefore, the second locking portion and the first locking portion can be reliably locked, and the boot can be reliably prevented from coming off.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a state before the modular plug according to the embodiment of the present invention is assembled. FIG. 2 is a side sectional view showing the state before the modular plug according to the embodiment of the present invention is assembled. FIG. 3 is a side sectional view showing a state after the modular plug according to the embodiment of the present invention is assembled. FIG. 4A is a front view showing a separator used in the modular plug according to the embodiment of the present invention. (B) is the side view, (C) is front sectional drawing which shows the arrangement | positioning state of a core wire.

  The modular plug according to the embodiment of the present invention is used for holding a cable formed by covering a plurality of core wires, and inserting and electrically connecting it to a modular jack of various devices. As a cable applied to this modular plug, for example, as in the Cat (category) 6 standard, a twisted pair formed by twisting two core wires as a pair and covering the outside with a sheath made of an insulator There is a type cable. Further, it can be applied to cables of various standards such as Cat5E, Cat5, and Cat3, and cables of network related standards using 8-pole 8-core plugs.

  As shown in FIGS. 1 to 4, the modular plug P according to the embodiment of the present invention includes a boot 1, a housing 2, a separator 3, a management bar 4, and a connection terminal (blade contact) 5. .

  The boot 1 is made of, for example, acrylonitrile-butadiene-styrene (ABS) resin, polyvinyl chloride (PVC) resin, or the like. The housing 2, the separator 3, and the management bar 4 are made of, for example, polycarbonate. The connection terminal 5 is made of phosphor bronze plated with nickel or gold.

  The boot 1 includes a main body 1b in which a first cable insertion portion 1a into which the cable K is inserted is formed, and a first cable insertion portion 1a formed at the tip of the main body 1b (the left end portion in FIGS. 1 to 3). And a pair of locking pieces 1c formed on the outer edge of the opening on the distal end side. Each locking piece 1c is inserted into the housing 2, and a substantially triangular first locking portion 1d is formed at the tip thereof.

  The housing 2 is formed in a substantially rectangular parallelepiped shape as a whole, and on the top surface 2a side (the lower side in FIG. 1, the upper side in FIGS. 2 and 3) of the tip (the left side end in FIGS. Protrusions 2b for fitting into corresponding recesses (not shown) are formed. Further, on the upper surface 2a of the housing 2, a locking projection 2c for engaging with a corresponding engaging portion of the modular jack so as to extend rearward from the protruding portion 2b, and a modular plug P are connected to the modular jack. A lever portion 2d for releasing the engagement of the locking projection 2c is formed when it is removed from the lever.

  In the housing 2, a second cable insertion portion 2e for inserting the cable K and a core wire insertion portion 2f for inserting the plurality of core wires S exposed by removing the covering of the cable K are formed.

  A step 2g having an opening 2f 'is formed on the lower surface 2h on the base end side of the housing 2, and a second locking portion 2i is formed in the opening 2f'. By pushing and bending the second locking portion 2i into the second cable insertion portion 2e, the first locking portion 1d formed on the locking piece 1c of the boot 1 is made to bite into the surface of the cable K. The housing 2 can be fixed to the boot 1.

  The separator 3 is disposed in the core wire insertion portion 2f of the housing 2, and in order to avoid interference between the core wires of the cable K, a plurality of the core wires of the cable K are separated and arranged in pairs. .

  As shown in FIG. 4, the separator 3 includes a first guide portion 3c having a substantially U-shaped cross section including a first back surface 3a and a pair of first open surfaces 3b, and a pair of second back surface 3d and a pair of first back surfaces 3b. A second guide portion 3f having a substantially U-shaped cross section composed of the second open surface 3e, the middle of the first back surface 3a of the first guide portion 3c, and the second back surface 3d of the second guide portion 3f. 3g which connects the middle of these.

  Moreover, it arrange | positions in the front-end | tip part which a pair of 1st open surface 3b opposes, the front-end | tip part which a pair of 2nd open surface 3e opposes, the both ends which the 1st back surface 3a and 2nd back surface 3d oppose. Core wire fixing stoppers 7 for fixing the core wires thus formed are respectively formed.

  The management bar 4 is disposed in the core wire insertion portion 2f of the housing 2 and aligns the core wires separated by the separator 3 in a parallel state.

  The connection terminal 5 is held by a connection terminal holding portion 6 provided at the tip of the housing 2. The distal end portion of the connection terminal 5 is separated by the separator 3 and is in contact with and electrically connected to the cores S that are in parallel by the management bar 4.

  Next, assembly work of the modular plug P according to the embodiment of the present invention will be described.

  First, the cable K is inserted into the first cable insertion portion 1 a of the boot 1.

  Next, the sheath at the tip end portion of the cable K taken out through the opening of the first cable insertion portion 1a of the boot 1 is peeled off, the portion at the cross intervening position is cut, and the inner core wire S is untwisted.

  Next, each core wire S is inserted into the separator 3 according to a predetermined connection method. At that time, as shown in FIG. 4C, the core wires S1 and S2 leaving the first pair of two twists are arranged in the first guide portion 3c, and the second guide portion 3f has the second wires. Core wires S3 and S4 leaving two twists in the set are arranged, core wires S5 and S6 having two twists in the third set are arranged in the upper portion of the connecting portion 3g, and the fourth wires are arranged in the lower portion of the connecting portion 3g. Two core wires S7 and S8, in which the twist of the set is unwound, are arranged.

  Next, each core wire S is extended, inserted into the management bar 4, and the tip is cut.

  Next, the cable K is inserted into the second cable insertion portion 2e of the housing 2, the core wires aligned by the management bar 4 are inserted into the core wire insertion portion 2f, and the connection terminals 5 are brought into contact with each other electrically. Connecting.

  After that, the second locking portion 2i was pushed and bent into the second cable insertion portion 2e by using a press-fitting tool, so that the surface of the cable K was bitten and formed on the locking piece 1c of the boot 1. The housing 2 is fixed to the boot 1 by being locked by the first locking portion 1d. Thereby, the assembly work of the modular plug P is completed.

  According to the modular plug P according to the embodiment of the present invention, it is possible to arrange the core wires S1 to S4 with the strands left in the first guide portion 3c and the second guide portion 3f of the separator 3, and the connecting portion Since the twisted core wires S5 to S8 can be arranged at the upper and lower portions of 3g, the operation of arranging the core wires in one row becomes easy, and the assembling workability is improved.

  Further, since the core wire fixing stopper 7 is formed on the separator 3, the arrangement position of the core wire S is fixed, and the rising of the arranged core wire S and the tension of the core wire can be suppressed as much as possible. This facilitates the work of arranging the cores S in a row when inserted into the management bar 4 and improves the workability of the assembly.

  Moreover, since all the core wires S can be accommodated in the separator 3 by the core wire fixing stopper 7, the core wire S does not partially swell. Therefore, no pressing force is applied to the core wire S by the inner wall of the housing 2 at the time of insertion into the housing 2, and performance degradation such as generation of noise can be prevented.

  Furthermore, since the second locking portion 2i of the housing 2 is pushed and bent to be locked to the first locking portion 1d of the locking piece 1c of the boot 1, the first locking portion 1c of the boot 1 is locked. The locking portion 1d can be designed to sufficiently contact the inner wall of the housing 2. Therefore, the second locking portion 2i and the first locking portion 1d can be reliably locked, and the boot 1 can be reliably prevented from coming off.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims. For example, the material and shape of each member constituting the modular plug P according to the embodiment of the present invention are examples, and the present invention is not limited thereto.

  The modular plug of the present invention is used for telephones, LANs (local area networks), etc., and is used for holding a cable formed by covering a plurality of core wires and inserting the cable into a modular jack for electrical connection. .

It is a disassembled perspective view which shows the state before the assembly of the modular plug which concerns on the example of embodiment of this invention. It is side surface sectional drawing which shows the state before the assembly of the modular plug which concerns on the example of embodiment of this invention. It is side surface sectional drawing which shows the state after the assembly of the modular plug which concerns on the example of embodiment of this invention. (A) is a front view which shows the separator used for the modular plug which concerns on the embodiment of this invention, (B) is the side view, (C) is front sectional drawing which shows the arrangement | positioning state of a core wire. It is front sectional drawing which shows an example of the separator of the prior art example 1. FIG.

Explanation of symbols

P: Modular plug K: Cable S: Core wire 1: Boot 2: Housing 3: Separator 4: Management bar 5: Connection terminal 6: Connection terminal holding part 7: Stopper for fixing the core wire

Claims (3)

In a modular plug that holds a cable formed by covering a plurality of core wires and is inserted into a modular jack and electrically connected,
A boot formed with a first cable insertion portion for inserting the cable;
A housing that is locked to the boot and has a second cable insertion portion for inserting the cable and a core wire insertion portion for inserting a plurality of core wires exposed by removing the coating of the cable;
A separator that is disposed in a core wire insertion portion of the housing, and that separates and arranges the plurality of core wires for each set;
A connection terminal attached to the tip of the housing and connected to each core wire separated by the separator;
Have
The separator includes a first guide portion having a substantially U-shaped cross section including a first back surface and a pair of first open surfaces, and a substantially cross-sectional shape including a second back surface and a pair of second open surfaces. A character-shaped second guide portion; and a connecting portion that connects the middle of the first back surface of the first guide portion and the middle of the second back surface of the second guide portion;
Arranged core wires are disposed on the opposing tip portions of the pair of first open surfaces, the opposing tip portions of the pair of second open surfaces, the first back surface, and the opposing both ends of the second back surface. Each core wire fixing stopper is fixed.
A modular plug characterized by that. The housing is formed with a second locking portion for locking the cable inserted into the second cable insertion portion,
The boot is attached to a locking piece inserted into the housing and formed with a first locking portion,
By pushing and bending the second locking portion of the housing, the cable is bitten into the surface of the cable and is locked to the first locking portion of the locking piece of the boot, thereby fixing the housing to the boot. ,
The modular plug according to claim 1.   3. The modular plug according to claim 1, further comprising a management bar that is arranged in the core wire insertion portion of the housing and that aligns the core wires separated by the separator in a parallel state. 4.

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