JP2008103318A - Modular plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the need for special tools and simplify a mounting work on a communication cable as compared with a prior art. <P>SOLUTION: An electric wire 202 is inserted from an open tip end side of an insulation displacement slit 4c provided at an IDC terminal 4, and is pressed in with a thin plate such as a tip end part of a negative driver to accomplish connection of the IDC terminal 4 and the electric wire 202. Accordingly, each electric wire 202 can be inserted one by one into the insulation displacement slit 4c for connection, without the need of aligning tip parts of a plurality of wires as in the conventional case. Moreover, it is possible to have the insulation displacement slit 4c break insulation coating, just by pressing the electric wires 202 with a thin plate such as a tip end part of a negative driver, without using a special tool. As a result, a mounting work on a communication cable 200 is simplified as compared with a prior art. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a modular plug that is attached to the end of a communication cable formed by covering a plurality of electric wires with the same sheath and plugged into a modular jack.

  2. Description of the Related Art Conventionally, there has been provided a modular plug for connecting communication cables such as telephone lines and LAN cables in combination with a modular jack or connecting communication cables to communication devices (telephone, facsimile, modem, router, etc.). For example, a modular plug described in Patent Document 1 accommodates a sleeve having a holding hole that holds a plurality of electric wires of a communication cable arranged in series, and an end portion of the electric wire fixed to the sleeve. And a modular plug body for guiding the end of the electric wire into the hole through which the plurality of contacts protrude.

To attach the above conventional example to the end of the communication cable, peel off the sheath at the end of the communication cable, align the exposed wires in a row along the radial direction, and insert the wires into the sleeve holding holes in a predetermined order. After that, the communication cable with the sleeve is inserted into the hole of the modular plug body, and the contact of the modular plug body can be pressed against the electric wire held by the sleeve using a special tool. Wires and contacts are connected one-on-one by breaking through the insulation coating.
A microfilm of Japanese Utility Model Application No. 3-77372 (Japanese Utility Model Application No. 1-137983)

  However, in the above conventional example, using a sleeve facilitates the work of arranging a plurality of wires in a row (so-called “termination work”), but a special tool is required for connecting the contact and the wire. For this reason, it is troublesome to attach the modular plug to the end of the communication cable, and when attaching the sleeve to the modular plug body, the tips of the electric wires may be uneven and the connection with the contact may fail. there were. For example, in the case of a communication cable consisting of a twisted pair cable of 4 to 8 cores, the first wire, the second wire, the third wire, the sixth wire, the fourth wire, and the fifth wire with the specified pin assignment The pair of the No. 7 electric wire and the No. 8 electric wire are twisted, and it is necessary to return the twist of these four pairs of electric wires. However, the No. 3 electric wire and the No. 6 electric wire are It is necessary to unwind and rearrange the wires so as to straddle the 5th wire, and the troublesome problem that even a skilled person can easily make an error when arranging the 3rd, 4th, 5th, 6th wires. there were.

  Moreover, in the communication cable which consists of a 4 to 8 twisted pair cable as described above, two pairs or four pairs of four pairs of electric wires are used for transmission and reception, and inductive coupling between pairs used for transmission and reception ( If crosstalk occurs due to electromagnetic coupling) or capacitive coupling (electrostatic coupling), communication quality may deteriorate, and information transmission may be disturbed. Especially for modular plugs and modular jacks, the first to eighth wire arrangements will straddle as described above, and the twisting of the 4-to-8-core twisted pair cable will be untwisted and connected. Although the end is applied, crosstalk tends to occur due to the collapse of the twisted structure of the pair (twist structure). Therefore, conventionally, in order to reduce the crosstalk between the pair, the crosstalk is totally compensated between the modular plug and the modular jack. In other words, since the modular plug is used by being connected to the modular jack, the crosstalk that is equal in size and reversed in phase to the crosstalk that is intentionally given by capacitive coupling or inductive coupling between the pair in the modular jack. Is added to the modular plug, the crosstalk between the two is canceled out, and the total crosstalk including the modular plug, the modular jack, and the respective communication cables can be reduced. Here, in order to ensure compatibility in the combination of the modular jack and the modular plug, the size and phase of the crosstalk to be provided in both the modular jack and the modular plug are defined, and in giving the crosstalk to the modular plug, The size and phase must be within the specified range.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a modular plug that does not require a dedicated special tool and can simplify the installation work to a communication cable as compared with the conventional example. There is.

  According to a first aspect of the present invention, there is provided a modular plug that is attached to the end of a communication cable formed by covering a plurality of electric wires with the same sheath and plugged into the modular jack. A plurality of contacts that conduct one-to-one contact with a plurality of contacts included in the connector, a connector portion that is inserted into a plug insertion port of a modular jack, and a plurality of wires that are connected to a plurality of wires of a communication cable in a one-to-one relationship A terminal part having a plurality of terminal plates connected to a plurality of contacts of the connector part on a one-to-one basis, and a terminal plate holding part for holding each terminal board. Is characterized in that a pressure contact slit is provided for breaking the insulation coating of the electric wire inserted from the opened front end side and press-contacting with the conductor of the electric wire.

  According to a second aspect of the present invention, in the first aspect of the present invention, the cap includes a cap that is detachably attached to the terminal portion and covers the terminal portion, and the cap abuts against the insulating coating of the electric wire so as to straddle the terminal plate. It has a pressing part to press-connect to the terminal board.

  In the invention of claim 2, it is desirable that the pressing portions are substantially equal to each other in contact dimensions with the electric wires at the portions where the pressing portions are in contact with the electric wires across the terminal plate.

  The invention of claim 3 is the invention of claim 1 or 2, comprising a printed wiring board on which a plurality of conductive patterns for electrically connecting each contact of the connector part and each terminal board of the terminal part are formed. It is characterized by.

  In the invention of claim 3, the printed wiring board may have a contact mounted on one end side and a terminal board mounted on the other end side.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the terminal plate holding portion is provided with a guide groove having a width smaller than the outer diameter of the insulating coating and guiding the electric wire to the press-contact slit. It is characterized by that.

  According to the invention of claim 4, the cap has positioning means for positioning the pressing portion with respect to the terminal plate holding portion when the electric wire is press-connected to the terminal plate, and the positioning means protrudes from the guide groove. It may consist of one or more positioning protrusions that come into contact with both side surfaces of the terminal plate holding part from which the electric wire protrudes from the protruding direction of the electric wire. Further, the contact may be formed in a substantially U shape and sandwich the end portion of the printed wiring board in the thickness direction of the printed wiring board.

  Further, in the invention of claim 4, the taper in which the protruding amount from the side surface gradually decreases near the electric wire in the vicinity of the outer surface of the terminal plate holding portion from which the electric wire protruding from the guide groove protrudes on the side surface of the terminal portion. The part may be formed.

  Moreover, in any invention of Claims 1-4, the terminal board connected with the two electric wires coat | covered by the sheath in a twisted state is arranged adjacently. Further, the two electric wires are inserted between two twisted wires between the terminal plate holding portions for holding the terminal plates connected to the pair of wires. It may be provided with one or a plurality of guide protrusions for guiding the corresponding guide plate holding groove. Alternatively, it may be provided with a cable holding part for holding the communication cable connected to the terminal part by the sheath part, or provided with a case for holding at least the connector part and the terminal part, respectively, on the outer surface of the case It may be provided with a protrusion for preventing slipping when held by a finger.

  The invention according to claim 5 is the lock according to any one of claims 1 to 4, wherein the lock is provided on the outside of the connector portion so as to be elastically displaceable and prevents the connector portion inserted into the plug insertion port of the modular jack from coming off. A lock release lever that is pushed when the claw and the lock claw are elastically displaced in the lock release direction is provided, and the lock release lever is provided with a hook-shaped operation portion at a tip portion.

  In the invention of claim 5, the cap is disposed at a position facing the lock release lever, and a recess for escaping from the movement range of the operation portion is formed on the surface of the cap facing the lock release lever. Is desirable.

  The invention of claim 6 comprises the crosstalk adjusting means for adjusting the crosstalk of the transmission signal transmitted between the electrically connected contact and the terminal board in the invention of any one of claims 1-5. It is characterized by.

  In the invention of claim 6, the crosstalk adjusting means includes a plurality of through-hole wiring portions that are provided in the printed wiring board and are electrically connected to the contacts, and are formed on the same surface of the printed wiring board. Among a plurality of conductor patterns serving as transmission paths for transmission signals, those composed of parts where the distance between the conductor patterns is shorter than other parts, or a plurality of conductor patterns formed on different surfaces of the printed wiring board as transmission lines for transmission signals Among the plurality of conductor patterns, the printed wiring board is composed of a part that overlaps at least partly in the thickness direction of the printed wiring board, and the plurality of conductor patterns that are formed on different surfaces of the printed wiring board and serve as a transmission path for transmission signals Consisting of a plurality of conductor patterns intersecting portions in the thickness direction, consisting of a conductive portion provided integrally with a plate-shaped contact, Contacts are formed on Jo may be made of pierced by through holes.

  According to a seventh aspect of the present invention, in the sixth aspect of the present invention, in the communication cable, a plurality of sets of electric wires that are paired in pairs in a twisted state are covered with a sheath, and the crosstalk adjusting means includes a plurality of crosstalk adjusting means. It adjusts the crosstalk between the electric wires of different polarity which are not paired among the electric wires.

  The invention according to claim 8 is the invention according to claim 6, wherein the communication cable is formed by covering the sheath with a plurality of sets of electric wires that are paired in pairs in a twisted state. It is characterized by adjusting crosstalk between electric wires of the same polarity that are not paired among a plurality of electric wires.

  The invention according to claim 9 is the invention according to claim 3, wherein the printed wiring board includes a first printed wiring board on which the contact is mounted and a second printed wiring board on which the terminal board is mounted. The first and second printed wiring boards are characterized in that the ends where the contacts and terminal boards are not mounted are overlapped in the thickness direction and the conductive patterns are electrically connected to each other.

  According to the first aspect of the present invention, when the electric wire is inserted from the open end side of the press contact slit provided in the terminal plate, and the electric wire is pressed with a thin plate (for example, the tip portion of a minus driver), The insulation of the wire is broken by the pressure contact slit and the exposed wire conductor is pressure connected to the pressure contact slit, so that the wires are pressed in order without having to align the tips of the multiple wires as in the conventional example. It can be connected by simply inserting it into the slit, and without using a special special tool, for example, by pushing the electric wire with a general tool such as a flat-blade screwdriver, the insulation coating is broken on the pressure contact slit. As a result, it is possible to simplify the installation work to the communication cable as compared with the conventional example.

  According to invention of Claim 2, while covering with a cap, a terminal part can be protected from approach of foreign materials, such as dust, and the appearance and mechanical strength in appearance improve. In addition, if the cap is pressed with the pressing part straddling the terminal plate in contact with the insulation coating of the electric wire, the electric wire can be pushed into the press-contact slit via the pressing part, compared with the case of using a thin board. This makes it easier to connect the wires.

  In addition, in the invention of claim 2, if the abutting dimensions of the pressing part straddling the terminal plate and the electric wire in the respective abutting parts are substantially equal to each other, the pressing force applied to the electric wire from the pressing part is made uniform. Workability can be improved.

  According to invention of Claim 3, since each contact of a connector part and each terminal board of a terminal part are electrically connected by the conductive pattern formed in the printed wiring board, a contact and a terminal board are made with a metal lead. Compared to the case of connection, crosstalk coupling between the transmission lines including the contact and the terminal plate can be reduced.

  In addition, in the invention of claim 3, if a contact is mounted on one end side of one printed wiring board and a terminal board is mounted on the other end side, it is compared with the case where it is constituted by two printed wiring boards. Thus, the cost can be reduced by simplifying the configuration.

  According to the fourth aspect of the present invention, since the guide groove having a width narrower than the outer diameter of the insulating coating and guiding the electric wire to the press contact slit is provided in the terminal plate holding portion, the electric wire can be inserted by being press-fitted into the guide groove. Can be temporarily held, and the pushing operation of the electric wire into the pressure contact slit can be easily performed.

  According to a fourth aspect of the present invention, the cap has positioning means comprising one or more positioning protrusions that come into contact with both side surfaces of the terminal plate holding portion from which the electric wire protruding from the guide groove protrudes from the protruding direction of the electric wire. If it has, it can press an electric wire in the state which positioned the press part with respect to the terminal board holding | maintenance part, and workability | operativity improves. Furthermore, if the contact is formed in a substantially U-shape and the end of the printed wiring board is sandwiched in the thickness direction of the printed wiring board, the contact formed in the substantially U-shape is the end of the printed wiring board. Is sandwiched in the thickness direction of the printed wiring board, so that it is easy to attach the contact to the printed wiring board.

  Further, in the invention according to any one of claims 1 to 4, the amount of protrusion from the side surface gradually increases as it approaches the electric wire in the vicinity of the outer surface of the terminal plate holding portion where the electric wire protruding from the guide groove protrudes on the side surface of the terminal portion. If the taper portion that decreases to the guide groove is formed, the cutting edge of the tool can be escaped by the taper portion when cutting the extra length of the wire protruding from the guide groove with a tool such as a nipper, and as a result, the wire is cut. Work becomes easy.

  Moreover, in the invention of any one of claims 1 to 4, if the terminal plates connected to the two electric wires covered with the sheath in pairs in a twisted state are arranged adjacent to each other, Connection work of the electric wire to the terminal board becomes easy. Further, between the terminal plate holding portions that hold the terminal plates connected to the pair of electric wires, the two electric wires are respectively inserted between the two twisted wires, and the corresponding two electric wires are respectively corresponding to the terminal plate holding portions. In the case of having one or a plurality of guide protrusions for guiding the guide grooves, the guide protrusions provided between the terminal plate holding portions for holding the terminal plates connected to the paired wires are twisted. If inserted between two electric wires, the two electric wires are guided into the guide grooves of the corresponding terminal plate holding portions, so there is no need to untwist the electric wires, so that it is easier to connect the electric wires to the terminal plates. become. Alternatively, if the cable holding portion that holds the communication cable connected to the terminal portion is held by the sheath portion, the sheath of the communication cable connected to the terminal portion is held by the holding portion, so that the communication cable is pulled. It can suppress that force is applied to the connection part of an electric wire and a terminal board. Furthermore, if the case is provided with a case for holding at least the connector portion and the terminal portion, and the outer surface of the case is provided with a protrusion for preventing slipping when gripped by a finger, the outer surface of the case Since the protrusion for preventing slipping when gripped with a finger is provided, the case can be securely gripped with the finger when inserted into and removed from the modular jack or pressed by the pressing portion, and workability is improved.

  According to the invention of claim 5, since the hook-shaped operation portion is provided at the tip of the lock release lever, the operability of the lock release lever is improved.

  In addition, in the invention of claim 5, if the concave portion for escaping from the movement range of the operation portion is formed on the surface of the cap that faces the lock release lever, the cap does not get in the way when operating the operation portion. Operability is improved.

  According to the sixth aspect of the present invention, since the crosstalk of the transmission signal transmitted between the electrically connected contact and the terminal board is adjusted by the crosstalk adjusting means, a desired crosstalk performance can be easily obtained.

  In the invention of claim 6, if the crosstalk adjusting means includes a plurality of through-hole wiring portions that are provided in the printed wiring board and are electrically connected to the contacts, the distance between the through-hole wiring portions. The crosstalk amount of the transmission signal can be easily adjusted according to the distance, and the distance between the conductor patterns is shorter than other portions among the plurality of conductor patterns formed on the same surface of the printed wiring board and serving as the transmission path of the transmission signal. If it consists of parts, the amount of crosstalk of the transmission signal can be easily adjusted according to the distance between the conductor patterns, and among the plurality of conductor patterns that are formed on different surfaces of the printed wiring board and become the transmission path of the transmission signal The crosstalk amount of the transmission signal depends on the portion where the conductor patterns overlap in the thickness direction of the printed wiring board. Of the plurality of conductor patterns that can be easily adjusted and are formed on different surfaces of the printed wiring board to serve as transmission paths for transmission signals, the wiring pattern should be composed of intersecting portions of a plurality of conductor patterns that intersect in the thickness direction of the printed wiring board. For example, the crosstalk amount of the transmission signal can be easily adjusted according to the intersecting portions of the plurality of conductor patterns intersecting in the thickness direction of the printed wiring board, and the conductive portion is provided integrally with the plate-shaped contact. If it is a thing, the amount of crosstalk of a transmission signal can be easily adjusted according to the magnitude | size (area) of the electroconductive part provided integrally with the contact, from the through-hole penetrated by the contact formed in plate shape If it becomes, the amount of crosstalk of a transmission signal can be easily adjusted according to the magnitude | size (area) of the through-hole penetrated by the contact.

  According to invention of Claim 9, a printed wiring board is comprised by two sheets of the 1st and 2nd printed wiring board, and the edge parts in which the contact and terminal board in each printed wiring board are not mounted are thickness directions. Since the conductive patterns are electrically connected to each other so as to overlap each other, the height dimension of the terminal board can be increased while suppressing the height dimension in the overlapping direction of the printed wiring boards.

  Hereinafter, the technology of the present invention is applied to an RJ45 type modular plug that is attached to the end of a communication cable (4 to 8-core twisted pair cable such as a LAN cable) in which four pairs of twisted wires (wires) are covered with a sheath. An embodiment to which the idea is applied will be described. However, the modular plug to which the technical idea of the present invention is applicable is not limited to the RJ45 type.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS. In the following description, front and rear, left and right, and up and down directions are defined in FIG.

  As shown in FIGS. 1 and 2, a case is formed by joining an upper body 1 and a lower body 2 made of a synthetic resin molded product in the vertical direction, a contact 3 described later, an IDC terminal 4 that is a terminal plate, The first printed wiring board 5, the second printed wiring board 6, the contact holder 7, and the relay terminal 8 are accommodated in the case.

  As shown in FIGS. 1 and 4, the upper body 1 holds a plug housing 10 to be inserted into a plug insertion port of a modular jack (not shown) and eight IDC terminals 4 at the rear of the plug housing 10. The terminal housing 11 is integrally formed. The plug housing 10 has a substantially U-shaped cross-sectional shape with an open bottom surface, and a contact block including eight contacts 3, a first printed wiring board 5, and a contact holder 7 is accommodated therein as will be described later. Is done. Also, on the upper surface of the plug housing 10, a lock claw 10a that is prevented from being locked (locked) when inserted into the plug insertion port of the modular jack and a lock release lever 10b for releasing the lock by the lock claw 10a are integrally provided. It has been. However, since such a locking mechanism is well known in the art, a detailed description thereof will be omitted.

  On the other hand, the terminal housing 11 includes a rectangular flat plate-like base portion 12 protruding rearward from the rear end surface of the plug housing 10, and a total of ten terminal plate holding portions 13 respectively protruding upward from the left and right end portions of the base portion 12. It has. At substantially the center in the front-rear direction on both the left and right side surfaces of the base portion 12, elongated prismatic assembly protrusions 12a, 12a having the longitudinal direction as the front-rear direction are projected, and further, the rear end portion on the right side surface of the base portion 12 is A prismatic positioning projection 12b having a vertical direction is provided. The lower surfaces of the assembly protrusions 12a and 12a are inclined surfaces that are inclined downward toward the base 12 gradually.

  The left terminal board holding part 13 and the right terminal board holding part 13 are formed symmetrically with each other, and a total of eight guide grooves 13a opened upward between the terminal board holding parts 13 adjacent in the front-rear direction. Are provided in the vertical direction. Here, the width dimension in the front-rear direction of the guide groove 13a is narrower than the outer diameter of the insulation coating of the electric wire. Further, in the terminal plate holding portions 13 adjacent to each other in the front-rear direction, holding grooves 13b that are open on the side surface, the bottom surface, and the upper surface facing the guide groove 13a are formed, respectively, and a total of eight holding grooves 13b are respectively provided as described later. The IDC terminal 4 is inserted and held from below. However, the holding grooves 13b adjacent to each other in the front-rear direction are alternately arranged in the left-right direction so as to skip one line and form a line (see FIG. 4E). Further, the two terminal plate holding portions 13 excluding both ends and the center in the front-rear direction are provided with guide projections 13c having a substantially elliptical cone shape (a shape of a cone having a substantially elliptical bottom surface) on the top surface. .

  As shown in FIGS. 1 and 5, the lower body 2 includes a storage unit 20 that stores the second printed wiring board 6, and a cable holding unit 21 that holds the communication cable 200 at a portion of the sheath 201 as will be described later. It is molded integrally. The storage portion 20 is a main portion 22 formed in a thin rectangular flat plate shape, a pair of standing wall portions 23 and 23 that rise upward from both left and right ends of the main portion 22, and a rear portion that protrudes upward from the upper surface of the main portion 22. A projecting portion 24 connected to the cable holding portion 21 on the end side is provided. On the inner side surfaces of the standing wall portions 23, 23, step portions 23a are formed in the front-rear direction, and the upper surface of each step portion 23a and the upper surface of the projecting portion 24 are set to the same height (FIG. 5 ( a)). In addition, a pair of assembly pieces 23b, 23b, which are freely bent in the left-right direction with the lower end portion as a fulcrum, are erected upward at substantially the center in the front-rear direction of the standing wall portions 23, 23. In the pair of assembly pieces 23b, 23b, rectangular assembly holes 23c, 23c that engage with the assembly protrusions 12a, 12a projecting from the base portion 12 of the upper body 1 are respectively penetrated in the left-right direction. In addition, a prismatic positioning projection 23d is projected from the rear end portion of the right standing wall portion 23 so that the front and rear, right and left dimensions are the same as the positioning projection 12b of the upper body 1 and connected to the positioning projection 12b in the vertical direction. .

  The cable holding portion 21 includes a holding frame 25 having a cable insertion hole through which the communication cable 200 is inserted, and a connecting portion 26 that protrudes rearward from the rear end surfaces of the main portion 22 and the projecting base portion 24 and is connected to the holding frame 25. It consists of and. The holding frame 25 is formed in a substantially U-shape opened upward as a whole, and a rear wall 25a having a substantially semicircular recess is provided at the lower portion of the rear end surface. A pair of ribs 25b and 25b projecting inward are provided on the upper part of the inner peripheral surface of the holding frame 25 facing in the left-right direction. These ribs 25b, 25b are formed in a substantially circular arc shape on the lower side, and an inclined surface 25c is formed on the upper side. Therefore, a substantially circular cable insertion hole is formed by a space surrounded by the recess of the rear wall 25a and the pair of ribs 25b and 25b. Further, a pair of projecting pieces 25d and 25d projecting toward the cable insertion holes are provided on the inner peripheral surface of the holding frame 25 below the ribs 25b and 25b, respectively. By pressing the portion of the sheath 201 between 25d, the communication cable 200 is held by the holding frame 25 (cable holding portion 21) while being inserted through the cable insertion hole.

  In the lower body 2, the second printed wiring board 6 is placed on the protrusion 24 and the step 23 a. The second printed wiring board 6 has four through holes 6a penetrating at both ends in the left-right direction, and eight through holes 6b penetrating at the front end. Here, through-holes 6a adjacent in the front-rear direction are staggered in the left-right direction so that one through-hole is skipped, and four through-holes 6b are arranged in two lines in the front-rear direction. (See FIG. 1). The through holes 6a and 6b are plated with through holes, and a conductive pattern (not shown) for electrically connecting the through holes 6a and 6b to each other is formed on the lower surface of the second printed wiring board 6. Has been.

  The IDC terminal 4 includes a terminal piece 4a formed in a bifurcated fork shape having a pressure contact slit 4c opened at the upper peripheral edge, and a connection piece 4b protruding downward from the lower peripheral edge of the terminal piece 4a. The connecting piece 4b is fixed to the second printed wiring board 6 by being press-fitted into the through hole 6a, and is electrically connected to the conductive pattern on the lower surface through the through hole plating of the through hole 6a. The As described later, when the electric wire 202 of the communication cable 200 is press-fitted into the press-contact slit 4c, the insulation coating of the electric wire 202 is broken at the periphery of the press-contact slit 4c (periphery of the terminal piece 4a), and the electric wire 202 is formed at the periphery of the press-contact slit 4c. Conductors (not shown) are press-connected.

  The relay terminal 8 is formed by integrally forming a press-fit piece 8a that is press-fitted into the through hole 6b of the second printed wiring board 6 and a connection piece 8b that protrudes upward from the upper end edge of the press-fit piece 8a. 8a is press-fitted into the through hole 6b so that it is fixed to the second printed wiring board 6 and is electrically connected to the conductive pattern on the lower surface through the through hole plating of the through hole 6b. That is, the IDC terminal 4 and the relay terminal 8 are electrically connected through the through hole plating and the conductive pattern. Further, the connection piece 8b of the relay terminal 8 is inserted into a through hole 5a penetrating through the rear end portion of the first printed wiring board 5 and plated with through holes. Further, the first printed wiring board 5 has eight long hole-like through-holes 5b arranged in a line in the left-right direction at the front end portion, and electrically connects the through-holes 5a, 5b to each other. The conductive pattern (not shown) is formed on the upper surface.

  The contact 3 is integrally formed with a contact piece 3a that is in contact with the contact of the modular jack and a connection piece 3b that protrudes upward from the upper end surface of the contact piece 3a and has a smaller width dimension in the front-rear direction than the contact piece 3a. (See FIG. 1).

  The contact holder 7 includes a holder main body 70 made of a synthetic resin molded product having a substantially rectangular flat plate shape. As shown in FIG. 6, a recess is formed in the lower surface of the holder body 70 from approximately the center in the front-rear direction to the front end, and eight rectangular mounting holes 71 having the front-rear direction as the longitudinal direction are equally spaced in the left-right direction. A partition wall 72 is provided so as to project downward from the bottom surface of the recess. In addition, a pair of press-fitting protrusions 73 and 73 project from the side faces of the partition walls 72 and the side faces of the recesses facing the partition walls 72 at both left and right ends at positions facing the mounting holes 71. That is, the connecting piece 3b is inserted into the mounting hole 71 from the bottom to the top, and the press-fitting protrusions 73 projecting from the partition walls 72, 72 on the left and right sides of the mounting hole 71 (or the partition wall 72 and the side surfaces of the recesses). The contact 3 can be attached to the contact holder 7 by press-fitting the contact piece 3 a between 73. Further, a fitting recess 74 into which the first printed wiring board 5 is fitted is provided on the upper surface of the contact holder 7, and the connection piece 3 b of the contact 3 attached to the contact holder 7 is fitted into the fitting recess 74. It protrudes upward through a mounting hole 71 penetrating the bottom surface of the. Then, the first printed wiring board is fitted in the fitting recess 74 by inserting and soldering the connecting pieces 3b of the total eight contacts 3 through the through holes 5b from the bottom to the top. The contact holder 7 is fixed to 5. Further, the front ends of the holder body 70 on both the left and right side surfaces are provided with fitting protrusions 75 and 75 which are respectively fitted to the recesses 10d and 10d formed on the left and right inner wall surfaces of the plug housing 10 of the upper body 1. Projected.

  Thus, the first printed wiring board 5 on which the contact 3 is mounted and the contact holder 7 is fixed and the second printed wiring board 6 on which the IDC terminal 4 is mounted are electrically connected via the relay terminal 8. After the mechanical connection, the IDC terminal 4 is inserted into the holding groove 13b of the terminal housing 11 from the bottom to the top, and the fitting protrusions 75 and 75 of the contact holder 7 are fitted into the recesses 10c and 10c. If the first printed wiring board 5 is housed in the plug housing 10 (see FIG. 3) and the lower body 2 is attached from below the terminal housing 11, the assembly holes 23c, The upper body 1 and the lower body 2 are joined by engaging the assembly protrusions 12a and 12a with 23c, and the present embodiment is assembled (see FIG. 2).

  In the present embodiment, the terminal housing 11 is covered with the cap 9 to protect the connection portion between the electric wire 202 of the communication cable 200 and the IDC terminal 4 from the ingress of foreign matters such as dust, and the appearance and mechanical strength. To improve.

  As shown in FIGS. 1 and 7, the cap 9 includes a rectangular flat plate 90 that covers the upper surface of the terminal housing 11, side plates 91 and 92 that hang downward from the left and right edges of the top plate 90, and a right side plate. A synthetic resin integrally formed with a pressing portion 93 that hangs downward from the rear edge of the side plate 92 and a total of eight protective ribs 94 that protrude downward from the lower surface of the top plate 90 to the inner side surfaces of the side plates 91 and 92. It consists of molded products. In addition, bending portions 91a and 92a that are freely deflectable in the left-right direction with the upper end portion as a fulcrum are formed at substantially center portions in the front-rear direction of the side plates 91 and 92, and the inner side surfaces of the bending pieces 91a and 92a are respectively provided. Projections 91b and 92b are provided so as to project. Then, the projections 91b and 92b are engaged with the engagement recesses 13d and 13d formed on the outer surfaces of the pair of terminal plate holding portions 13 and 13 positioned at the center in the front-rear direction in the terminal housing 11 to thereby engage the terminal housing 11. The cap 9 can be fixed. Further, a narrow vertical groove 93a opened downward is provided at the lower end portion of the pressing portion 93, and positioning protrusions 12b provided at the lower right rear portion of the case (upper body 1 and lower body 2), The cap 9 can be positioned with respect to the terminal housing 11 by fitting 23d and the longitudinal groove 93a (see FIG. 10).

  The protective rib 94 is formed in a substantially U-shape having a vertical groove 94 a opened downward at a position corresponding to the guide groove 13 a of the terminal housing 11. When the cap 9 is attached to the terminal housing 11, a total of eight protective ribs 94 are fitted into the guide grooves 13 a so as to straddle the terminal plate holding portion 13 from the left and right sides of the terminal plate holding portion 13. The electric wire 202 connected to the IDC terminal 4 is prevented from going out of the guide groove 13a.

  Next, a procedure for attaching the present embodiment to the end of the communication cable 200 will be described. First, the sheath 201 at the end of the communication cable 200 is peeled off by an appropriate length (about 50 mm) to expose the eight core wires (electric wires 202), and then the end portion of the sheath 201 close to the peeled end is held. When pushed in from the top to the bottom with respect to the frame 25, the sheath 201 is guided by the inclined surfaces 25c, 25c of the ribs 25b, 25b and inserted through the cable insertion hole, and the sheath 201 is interposed between the pair of projecting pieces 25d, 25d. The communication cable 200 is held in the cable holding portion 21 (holding frame 25). Subsequently, the wires 202 and 202 are inserted into the guide grooves 13a and 13a while the twists of the pairs of wires 202 and 202 are pressed against the guide protrusions 13c from the top to the bottom while expanding the twists (FIG. 8). reference). Since the width of the guide groove 13a is set smaller than the outer diameter of the insulating coating of the electric wire 202, the electric wire 202 once inserted into the guide groove 13a is difficult to come off. Then, as shown in FIG. 9, if the pressing portion 93 of the cap 9 is brought into contact with the insulating coating of the electric wire 202 inserted in the guide groove 13 a so as to straddle the IDC terminal 4, and the cap 9 is pressed downward, it moves downward. Since the insulation coating of the electric wire 202 is broken by the pressure contact slit 4c of the IDC terminal 4 protruding into the holding groove 13b during the movement, the conductor (not shown) exposed from the broken insulation coating and the terminal pieces 4a, 4a Are connected to the IDC terminal 4 by elastic contact. After all the eight electric wires 202 are connected to the IDC terminal 4 in the above procedure, the extra length of the electric wires 202 protruding outside the terminal housing 11 is cut off, and further, the cap 9 is attached to the terminal housing 11 for communication. The modular plug of this embodiment can be attached to the end of the cable 200. Here, between the left and right side surfaces of the base portion 12 and the left and right side surfaces of the terminal plate holding portion 13, both are substantially flush with the cap 9 attached to the terminal housing 11 as shown in FIG. 10. However, the stepped portion is a tapered portion 12c in which the amount of protrusion from the side surface of the base 12 gradually decreases as the wire 202 is approached. That is, when the extra length portion of the electric wire 202 is excised using a tool such as a nipper, if the stepped portion obstructs and the blade of the tool (nipper) is difficult to approach the side surface of the terminal plate holding portion 13, The extra length may slightly protrude from the side surface of the terminal plate holding portion 13 and hinder the attachment of the cap 9 to the terminal housing 11, but as described above, the taper portion 12c is provided at the step portion so that the tool Since it becomes easy to bring the blade closer to the side surface of the terminal plate holding part 13, it is possible to prevent the excess length of the electric wire 202 after cutting from protruding from the side surface of the terminal plate holding part 13.

  As described above, in this embodiment, the electric wire 202 is inserted from the open end side of the press contact slit 4c provided in the IDC terminal 4, and the IDC terminal is pressed by pressing the electric wire with a thin plate such as the tip of a minus driver. 4 and the conductor of the electric wire 202 can be connected, so that the electric wires 202 can be connected by simply inserting them into the pressure contact slit 4c in order without having to align the tips of the plural electric wires as in the prior art. As a result, the attachment work to the communication cable 200 can be simplified as compared with the conventional example. In addition, since the pressing portion 93 that presses the insulation coating of the electric wire 202 is provided on the cap 9, the electric wire 202 can be connected to the IDC terminal 4 using the cap 9 without preparing a thin plate such as the tip of a minus driver. There is an advantage that the work efficiency is improved because the press-contact connection is possible, and the workability is good because a tool is unnecessary. In addition, since each contact 3 of the connector portion and each IDC terminal 4 of the terminal portion are electrically connected by the conductive pattern formed on the first and second printed wiring boards 5 and 6, for example, a metal lead Compared to the case where the contact 3 and the IDC terminal 4 are connected, the crosstalk coupling between the transmission lines including the contact 3 and the IDC terminal 4 can be reduced. Further, since the guide groove 13a having a narrower width than the outer diameter of the insulation coating of the electric wire 202 is provided in the terminal plate holding portion 13 and the electric wire 202 is guided to the press contact slit 4c, the electric wire 202 is press-fitted into the guide groove 13a. The electric wire 202 can be easily pushed into the press slit 4c.

  Here, in the present embodiment, the IDC terminals 4 and 4 connected to the two electric wires 202 covered with the sheath in pairs in a twisted state are arranged adjacent to each other in the front-rear direction. There is an advantage that the connection work of the electric wire 202 to the IDC terminal 4 becomes easy. In addition, as described above, two guide protrusions 13c provided between the terminal plate holding portions 13 and 13 holding the IDC terminals 4 and 4 connected to the pair of wires 202 and 202 are twisted. If inserted between the electric wires 202 and 202, the two electric wires 202 and 202 are guided to the guide grooves 13a of the corresponding terminal plate holding portions 13 and 13, respectively, so there is no need to return the twist of the electric wires 202 to IDC. The connection work of the electric wire 202 to the terminal 4 is further facilitated. Furthermore, since the sheath 201 of the communication cable 200 connected to the terminal portion is held by the cable holding portion 21, it is possible to suppress a force from being applied to the connection portion between the electric wire 202 and the IDC terminal 4 when the communication cable 200 is pulled. can do.

  Further, in this embodiment, as shown in FIG. 1, a hook-shaped operation portion 10c is provided at the tip of the lock release lever 10b, and the operation position of the lock release lever 10b is compared with the case where there is no operation portion 10c. There is an advantage that the operability of the lock release lever 10b is improved by moving the button upward.

  By the way, as explained in the prior art, in order to ensure compatibility in the combination of the modular jack and the modular plug, the amount of crosstalk (size and phase) of the modular plug must be within a specified range.

  Therefore, in the present embodiment, a crosstalk adjusting means for adjusting the crosstalk of the transmission signal transmitted between the contact 3 and the IDC terminal 4 is provided, and the connector section (contact 3, first print) is provided by the crosstalk adjusting means. The wiring board 5, the contact holder 7, the plug housing 10) and the terminal portion (IDC terminal 4, second printed wiring board 6, terminal housing 11, lower body 2) are given a capacitive component between predetermined pairs, and the connector The modular plug and the modular jack are connected by applying an inductive component between a predetermined pair in the connection portion between the terminal portion and the terminal portion (such as the conductor pattern of the first and second printed wiring boards 5 and 6 and the relay terminal 8). It reduces the total crosstalk when you do.

  The crosstalk adjusting means, for example, applies a conductive component that connects a predetermined pair (contact 3 and IDC terminal 4) to each other in the first printed wiring board 5 or the second printed wiring board 6 as a capacitor component. Formed in the shape of a comb tooth and placed close to each other, or by using a multilayer wiring board, the above conductive patterns are stacked in the vertical direction, and multiple through holes that are placed close to each other are plated through holes. On the other hand, it can be realized with a structure in which the conductive pattern is formed in proximity to provide the inductive component.

  Alternatively, as shown in FIG. 11A, a rectangular plate-like conductive portion 3e is integrally provided from the rear end portion of the contact 3, thereby increasing the capacitance component generated between the adjacent contacts 3, or FIG. As shown in FIG. 3, the through hole 3f may be provided in the contact 3 to reduce the capacitance component generated between the adjacent contacts 3.

  By the way, in the present embodiment, the substrate on which the contact 3 is mounted and the substrate on which the IDC terminal 4 is mounted are different substrates, that is, the first printed wiring board 5 and the second printed wiring board 6. Thus, while suppressing the height position of the terminal portion in the vertical direction, the length of the terminal pieces 4a, 4a of the IDC terminal 4 is lengthened to prevent excessive elastic force. That is, if the length dimension of the terminal pieces 4a and 4a of the IDC terminal 4 is shortened in order to suppress the height position of the terminal portion, the elastic force of the terminal pieces 4a and 4a increases, so that it is difficult to bend. Although it becomes difficult to perform an operation of inserting the electric wire into the slit 4c, such a problem does not occur in the present embodiment.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. However, since the basic configuration of the present embodiment is substantially the same as that of the first embodiment, the same reference numerals are given to common components (some differences in shape are regarded as common), and illustration and description are omitted as appropriate. . In the following description, front and rear, left and right, and up and down directions are defined in FIG.

  In the present embodiment, as shown in FIG. 12, the upper body 1 and the IDC terminal 4 are substantially the same as in the first embodiment, but the lower case 14, the contact 3, the contact holder 7, and the printed wiring board 15 are the same as those in the first embodiment. It is different.

  As shown in FIGS. 12 and 14, the lower case 14 includes a first case portion 2 having substantially the same shape as the lower body 2 in the first embodiment, and a second case protruding forward from the front end surface of the first case portion 2. The case part 140 is composed of a synthetic resin molded product formed integrally. The second case portion 140 has a rectangular flat plate bottom plate portion 141 on which the front portion of the printed wiring board 15 is placed, and a step-like connection that connects the rear end of the bottom plate portion 141 and the front end of the first case portion 2. A piece 142, a front wall 143 projecting upward from the front end of the bottom plate portion 141, a pair of engaging pieces 144, 144 rising upward from the front portions of the left and right side surfaces of the bottom plate portion 141, and the center of the left and right side surfaces of the bottom plate portion 141 It has a pair of restricting pieces 145 and 145 that protrude upward and restrict the position of the printed wiring board 15 in the left-right direction. As shown in FIG. 14, a recess is formed in the lower surface of the bottom plate portion 141 and the front surface of the front wall 143, and eight rectangular insertion holes 141a with the front-rear direction as the longitudinal direction are arranged at equal intervals in the left-right direction. A partition wall 141b that penetrates the bottom surface of the place and separates between the adjacent insertion holes 141a protrudes downward and forward from the bottom surface of the recess. Engaging claws 144 a and 144 a projecting outward in the left-right direction are projected on the outer surface of the distal end of the engaging piece 144, and the pair of engaging claws 144 a and 144 a are arranged at the upper front of the plug housing 10. The second case portion 14 is coupled to the plug housing 10 of the upper body 1 by engaging with the engagement holes 10e, 10e penetrating at both the left and right ends in FIG.

  The printed wiring board 15 is thinner than the first and second printed wiring boards 5 and 6 in the first embodiment, and four through holes 15a are provided at both ends in the left-right direction at the rear part. In addition, eight through holes 15b are formed through the front end portion. Here, rear through-holes 15a adjacent in the front-rear direction are alternately arranged in the left-right direction so that one line is skipped, and the eight through-holes 15b on the front side are arranged in a line in the left-right direction. (See FIG. 12). The through holes 15a and 15b are plated with through holes, and a conductive pattern (not shown) for electrically connecting the through holes 15a and 15b to each other is formed on the lower surface. Then, the connection piece 4b of the IDC terminal 4 is fixed to the printed wiring board 15 by being press-fitted into the through hole 15a, and is electrically connected to the conductive pattern on the lower surface through the through hole plating of the through hole 15a.

  In the contact 3 in this embodiment, the height of the contact piece 3a in the vertical direction is smaller than that in the first embodiment, and positioning pieces 3c and 3d are projected upward at both front and rear ends of the contact piece 3a. .

  The contact holder 16 is made of a synthetic resin molded product having a substantially rectangular flat plate shape, and as shown in FIGS. 12 and 15, eight rectangular mounting holes 16a having the longitudinal direction as the longitudinal direction are arranged at equal intervals in the lateral direction. Has been. In addition, press-fitting protrusions 16b are provided on the inner side surfaces of the mounting holes 16a facing in the left-right direction. That is, the contact piece 3b is inserted into the mounting hole 16a from the bottom to the top, and the contact piece 3a is press-fitted between the press-fitting protrusions 16b and 16b protruding from the left and right side surfaces of the mounting hole 16a. 3 can be attached to the contact holder 16. At this time, the contact 3 is positioned on the contact holder 16 by fitting the positioning pieces 3 c and 3 d of the contact 3 into the positioning grooves 16 c and the positioning holes 16 d provided in the contact holder 16. Then, the contact pieces 3b of the total eight contacts 3 are respectively inserted into the through holes 15a from the bottom upward and soldered, whereby the contacts 3 are mounted on the printed wiring board 15 and at the same time the contact holder 16 is fixed. Is done.

  Thus, after mounting the contact 3 and the IDC terminal 4 on the printed wiring board 15 and fixing the contact holder 16 to the printed wiring board 15, the IDC terminal 4 faces the holding groove 13 b of the terminal housing 11 from the bottom to the top. When the printed wiring board 15 is inserted into the upper body 1 and the lower case 14 is attached from below, the assembly holes 23c and 23c of the assembly pieces 23b and 23b engage with the assembly protrusions 12a and 12a. At the same time, the engaging claws 144a and 144a are engaged with the engaging holes 10d and 10d of the plug housing 10 from the inside, so that the upper body 1 and the lower case 14 are coupled to assemble the present embodiment (see FIG. 13). .

  As described above, in the present embodiment, since the contact 3 and the IDC terminal 4 are mounted on the same printed wiring board 15, the number of components (the second printed wiring board 6 and the relay is compared with that of the first embodiment). There is an advantage that the cost can be reduced by reducing the terminal 8) and the manufacturing process.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. However, since the basic configuration of the present embodiment is substantially the same as that of the second embodiment, the same reference numerals are assigned to the common components (some differences in shape are considered common), and illustration and description thereof are omitted as appropriate. . In the following description, front and rear, left and right, and up and down directions are defined in FIG.

  In the present embodiment, as shown in FIG. 16, the contact 17, the contact holder 18, and the printed wiring board 15 are different from the second embodiment. The contact 17 is formed in a substantially U shape by bending an elastic strip-shaped metal member, and is attached to the front end portion of the printed wiring board 15 so as to be sandwiched from above and below as will be described later. . Further, at both ends of the contact 17, angle-shaped engaging portions 17 a and 17 a that protrude outward (upward and downward) are formed. The front end of the printed wiring board 15 has eight grooves 15c in which the central portions of the contacts 17 are fitted in a line at equal intervals in the left-right direction.

  As shown in FIGS. 16 and 19, the contact holder 18 is formed of a rectangular tube-shaped synthetic resin molded product having an upper wall 18 a, a lower wall 18 b, and left and right side walls 18 c and 18 c. Eight rectangular relief holes 18d whose longitudinal direction is the front-rear direction are provided in the upper wall 18a so as to be arranged at equal intervals in the left-right direction. Further, partitioning pieces 18e that respectively contact the front end surface of the printed wiring board 15 are suspended downward from the front end of the upper wall 18a between the grooves 15c. The lower wall 18b and the lower portions of the side walls 18c, 18c are located at the front end behind the upper wall 18a so that the contacts 17 attached to the printed wiring board 15 are exposed downward (see FIG. 18). ). Further, eight rectangular relief grooves 18f whose front ends are opened and whose longitudinal direction is the longitudinal direction are arranged in the left and right direction at equal intervals and penetrated through the lower wall 18b, and the substantially central portion of the relief groove 18f in the longitudinal direction. Is provided with a substantially cylindrical engaged portion 18g whose axial direction is the left-right direction. That is, when the contact 17 is attached to the front end portion of the printed wiring board 15 covered with the contact holder 18, the contact holder 18 is engaged with the engaged part 18g by engaging the engaging part 17a of the contact 17 with the printed wiring board. 15 (see FIG. 18).

  Thus, after mounting the IDC terminal 4 on the printed wiring board 15 and attaching and fixing the contact 17 and the contact holder 18 to the printed wiring board 15, the IDC terminal 4 is inserted into the holding groove 13 b of the terminal housing 11 from below. If the printed wiring board 15 is accommodated in the upper body 1 and the lower case 14 is attached from below, the assembly holes 23c and 23c of the assembly pieces 23b and 23b are connected to the assembly protrusions 12a and 12a. In addition to engaging, the engaging claws 144a and 144a engage with the engaging holes 10d and 10d of the plug housing 10 from the inside, whereby the upper body 1 and the lower case 14 are coupled to assemble the present embodiment (see FIG. 17).

  As described above, in the present embodiment, since the contact 3 and the IDC terminal 4 are mounted on the same printed wiring board 15, the cost can be reduced by reducing the number of parts and the manufacturing process as in the second embodiment. In addition, since the contact 17 formed in a substantially U-shape is attached so that the end portion of the printed wiring board 15 is sandwiched in the thickness direction of the printed wiring board 15, Embodiment 1 or Embodiment 2 Thus, there is no need to solder the connection piece 3b of the contact 3, and there is an advantage that the work of attaching the contact 17 to the printed wiring board 15 becomes easy. Further, in this embodiment, since the vertical dimension of the contact 17 and the contact holder 18 is suppressed, the IDC terminal 4 is suppressed while suppressing the height position of the terminal portion in the vertical direction as in the first and second embodiments. It is possible to prevent the elastic force from becoming excessive by increasing the length of the terminal pieces 4a, 4a.

  Here, in the present embodiment, as shown in FIG. 20, the crosstalk adjusting means comprising a plurality of through-hole wiring portions 15d that are provided in the printed wiring board 15 and are electrically connected (contact conduction) to the contacts 17. The crosstalk can be adjusted by applying a capacitance component between the adjacent through-hole wiring portions 15d.

(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIGS. However, since the basic configuration of the present embodiment is almost the same as that of the third embodiment, the same reference numerals are given to common components (some differences in shape are regarded as common), and illustration and description are omitted as appropriate. . In the following description, front and rear, left and right, and up and down directions are defined in FIG.

  In the present embodiment, the contact 30, the contact holder 31, and the cap 9 are mainly different from the third embodiment. The contact 30 is composed of a substantially straight rod-shaped main piece 30a, a substantially U-shaped contact piece 30b provided on the front end side of the main piece 30a, and a connection piece 30c provided on the rear end side of the main piece 30a. It is integrally formed of materials. However, there are two types of contacts 30 in which the main piece 30a and the contact piece 30b have different dimensions. The connection piece 30 c is formed in the same shape as the connection piece 4 b of the IDC terminal 4, and is fixed to the printed wiring board 15 by being press-fitted into a through hole 15 e provided near the front end of the printed wiring board 15. The through hole 15e is electrically connected to the conductive pattern on the upper surface or the lower surface through the through hole plating. Here, the four through holes 15e are arranged in two rows so that four rows do not overlap in the front-rear direction, and the connection piece 30c of the contact 30 having a shorter dimension is press-fitted into the front through hole 15e. When the connecting piece 30c of the contact 30 having the longer dimension is press-fitted into the through hole 15e on the rear side, the front ends of the contact pieces 30b of all the contacts 30 are aligned substantially in parallel with the front ends of the printed wiring board 15. Yes.

  The contact holder 31 is made of a synthetic resin molding having insulating properties, and has a total of eight storage grooves 31a in which the contacts 30 are respectively stored, and a partition wall 31b that separates the storage grooves 31a on the front end side. On the end side, there is a protrusion 31c interposed between the main pieces 30a of each contact 30. In the storage groove 31a, fitting portions 31d are formed to be fitted from the rear to the contact pieces 30b of the two types of contacts 30, and each fitting portion 31d is fitted to the contact piece 30b as shown in FIG. As a result, the contact 30 is held in a state of being housed in the housing groove 31a. However, in the fitting part 31d fitted to the contact piece 30b of the contact 30 having the longer dimension, the rib 31e is projected from the upper surface to cope with the difference in dimension. The front end portions on both the upper and lower sides of the partition wall 31b are formed in a substantially arc shape. Further, when the connection piece 31b of the contact 30 is press-fitted into the through hole 15e and mounted on the printed wiring board 15, the lower surface of the contact holder 31 is positioned below the lower surface of the printed wiring board 15, as shown in FIG. However, this is because when the printed wiring board 15 is attached to the lower body 50 as described later, the lower surface of the front end portion of the lower body 50 and the lower surface of the contact holder 31 are substantially flush with each other. . Here, since the main pieces 30a of the contacts 30 adjacent to each other in the left-right direction are alternately arranged in the vertical direction, the contacts 30 held by the contact holder 31 are separated from each other by the distance between the adjacent contacts 30. It can be reduced relatively.

  The upper body 1 and the lower body 50 in the present embodiment are such that the cable holding portion 21 is provided integrally with the terminal housing 11 of the upper body 1, and the holding grooves 13b of the terminal housing 11 are arranged in a straight line in the front-rear direction. The point provided in each terminal holding part 13 is different from the first to third embodiments.

  The lower body 50 includes a rectangular plate-shaped first plate portion 51 that closes the lower surface of the terminal housing 11 in the upper body 1, and a rectangular plate-shaped second plate portion 52 that closes the lower surface of the plug housing 10 in the upper body 1. Are integrally formed so as to be stepped in the vertical direction. Two protrusions 51a on which the printed wiring board 15 is placed are juxtaposed in the left-right direction on the upper surface of the first plate portion 51, and the printed wiring board 15 is provided outside the protrusions 51a in the left-right direction. The recesses 51b for escaping the connecting pieces 4b of the IDC terminals 4 protruding to the lower surface side of the IDC terminals 4 are arranged in the front-rear direction. In addition, on the upper surface of the second plate portion 52, recesses 52a for escaping the connection pieces 30c of the contacts 30 protruding to the lower surface side of the printed wiring board 15 are arranged in the left-right direction in two rows in the front-rear direction.

  Further, at the rear end portion of the lower surface of the first plate portion 51, an anti-slip portion 53 made up of three protrusions having a longitudinal direction in the left-right direction is provided so as to be arranged at substantially equal intervals in the front-rear direction (see FIG. 23 (c)). That is, when inserting / removing the modular plug into / from the modular jack, or when connecting the electric wire 202 to the IDC terminal 4 using the cap 9, the finger having the lower body 50 from below becomes difficult to slip by the anti-slip portion 53. And workability at the time of electric wire connection are improved. However, the number and shape of the anti-slip portions 53 are not limited to those of the present embodiment, and for example, they are X-shaped protrusions in a plan view, or fine dot-shaped protrusions are arranged in the front-rear and left-right directions. It doesn't matter if you do. The lower body 50 is coupled to the upper body 1 by an appropriate method such as adhesion or ultrasonic welding while being fitted to the lower surface side of the upper body 1.

  By the way, in Embodiments 1-3, the front-rear length of the printed wiring board 15 is increased by alternately arranging the four IDC terminals 4 mounted side by side in the front-rear direction at the left and right ends of the printed wiring board 15 in the left-right direction. Although shortened, the length of the terminal board holding | maintenance part 13 of the both sides of the terminal holding groove 13b in the guide groove 13a becomes non-uniform | heterogenous by this. In the first to third embodiments, the dimensions on both sides of the vertical groove 93a in the pressing portion 93 of the cap 9 are not uniform. Thus, the lengths of the terminal plate holding portions 13 on the left and right sides of the terminal holding groove 13b in the guide groove 13a are not uniform, and the dimensions on both sides of the vertical groove 93a in the pressing portion 93 of the cap 9 are not uniform. In combination with this, it may be difficult to press the cap 9 so that the pressing force acting on the insulating coating of the electric wire 202 from the pressing portion 93 is uniform on both the left and right sides of the IDC terminal 4.

  On the other hand, in the present embodiment, the four IDC terminals 4 are mounted in a straight line in the front-rear direction at the left and right ends of the printed wiring board 15, and the terminals on the left and right sides of the terminal holding groove 13b in the guide groove 13a are mounted. The length of the plate holding part 13 is made uniform, and the dimensions on both sides of the vertical groove 93a in the pressing part 93 of the cap 9 are made uniform (see FIG. 26). As a result, as shown in FIG. 27, since the dimensions of the terminal plate holding portion 13 and the pressing portion 93 that come into contact with the insulating coating of the electric wire 202 are substantially equal on both the left and right sides of the IDC terminal 4, the insulating coating of the electric wire 202 from the pressing portion 93 It is easy to push the cap 9 so that the pressing force acting on the left and right sides of the IDC terminal 4 is uniform.

  In addition, a pair of positioning protrusions 93 b are provided at both ends in the front-rear direction on the inner surface of the pressing portion 93. The pair of positioning protrusions 93b are formed of protrusions parallel to each other in the vertical direction, the protrusion dimensions thereof are equal to each other, and the distance d (see FIG. 26 (f)) is the width dimension in the left-right direction of the terminal board holding portion 13. They are formed with almost the same dimensions. Therefore, as shown in FIG. 28, the pair of positioning protrusions 93 b come into contact with the left and right side surfaces of the terminal plate holding portion 13 from both the left and right sides, whereby the pressing portion 93 can be positioned with respect to the terminal plate holding portion 13. In this embodiment, the positioning protrusion 93b is provided on the inner surface of the pressing portion 93. However, the position where the positioning protrusion 93b is provided is not limited to the inner surface of the pressing portion 93, and the outer surface or the inner surface and the outer surface are not limited. It may be provided on both sides. Alternatively, one of the pair of positioning projections 93b may be provided on the inner surface of the pressing portion 93 and the other may be provided on the outer surface.

  Furthermore, a stopper portion 93c is provided on the upper portion of the positioning projection 93b. The stopper portion 93c protrudes inward in the left-right direction and regulates the insertion amount of the pressing portion 93 into the guide groove 13a by contacting the tip of the terminal plate holding portion 13. When the electric wire 202 is connected to the IDC terminal 4 using the cap 9, it is possible to prevent the occurrence of a problem such that the pressing portion 93 is excessively pushed into the guide groove 13a and is damaged. In addition, rectangular engagement holes 95 are respectively provided at lower end portions at both front and rear ends of both side plates 91 and 92, and are formed on engagement protrusions 12 d protruding at both front and rear end portions on the left and right side surfaces of the terminal housing 11. The cap 9 is attached to the terminal housing 11 by engaging each other.

  Here, in the state where the cap 9 is attached to the terminal housing 11, the distance between the cap 9, the front end, and the lock release lever 10 b becomes short, and there is a possibility that the operation unit 10 c may be difficult to operate. Therefore, in this embodiment, as shown in FIGS. 22 and 26, a recess 96 recessed backward is provided in the front end portion of the cap 9, and the operation portion 10c is released by the recess 96 when the lock release lever 10b is operated. Operability is improved. The upper surface of the cap 9 is formed with a concave portion 97 having a curved shape so that the belly of the finger extends along with the anti-slip portion 53 on the lower surface of the lower body 50, and operability when the modular plug is inserted into and removed from the modular jack. Has improved.

  FIG. 29 shows a view of the conductive pattern P formed on the printed wiring board 15 as viewed from the upper surface side, and the one painted black indicates the conductive pattern P1 formed on the upper surface of the printed wiring board 15 and is thin. The hatched one shows the conductive pattern P2 formed on the lower surface of the printed wiring board 15. A part of each of the conductive patterns P1 and P2 on each surface is given a capacitance component by forming the front end portion in a comb shape. Moreover, the capacitive component and the inductive component are imparted by partially overlapping, intersecting, or bringing the conductive patterns P1 and P2 on each surface partially in the thickness direction (vertical direction) of the printed wiring board 15. Here, with respect to the number of contacts 30 and IDC terminals 4 to which a capacitive component or an inductive component is applied between the prescribed pin assignments, there are a plurality of factors based on the relative relationship with the crosstalk component of the modular jack. What is necessary is just to adjust the crosstalk between the same polarity electric wires which are not paired among the electric wires 202, or between the different polarity electric wires which are not paired among the plurality of electric wires.

  In each of the above-described embodiments, the printed wiring boards 5, 6, 15 are used to electrically connect the contacts 4, 17, 30 and the IDC terminal 4 or the IDC terminal 4 and the relay terminal 8. Not limited to the type of printed circuit board, regardless of whether the base material of the base is metal or non-metal, the contact means 4, 17 and 30 and the IDC terminal 4 or the IDC terminal 4 are conductive means on which a conductive layer is formed. The relay terminal 8 may be electrically connected.

It is a disassembled perspective view which shows Embodiment 1 of this invention. It is the perspective view which removed the same cap. It is the perspective view which removed the cap and lower case same as the above. The upper case is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. It is. The lower case is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. It is. The contact cover in the same as above is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. It is. The cap in the above is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. is there. It is a perspective view for demonstrating the connection procedure of a communication cable same as the above. It is a perspective view for demonstrating the connection procedure of a communication cable same as the above. It is the perspective view which attached the same cap. (A), (b) is a top view which shows the contact of the other structure in the same as the above. It is a disassembled perspective view which shows Embodiment 2 of this invention. It is the perspective view which removed the same cap. The upper case is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. It is. It is a top view of the contact cover in the same as the above. It is a disassembled perspective view which shows Embodiment 3 of this invention. It is the perspective view which removed the same cap. It is a perspective view of a contact, a terminal board, a contact cover, and a printed wiring board in the same as the above. The contact cover in the same as above is shown, (a) is a front view, (b) is a right side view, (c) is a rear view, (d) is a left side view, (e) is a top view, and (f) is a bottom view. It is. It is a principal part perspective view of the printed wiring board in the same as the above. It is a disassembled perspective view which shows Embodiment 4 of this invention. It is a perspective view same as the above. The state where the cap is removed is shown, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a left side view, and (e) is a right side view. It is a perspective view of a contact, a terminal board, a contact cover, and a printed wiring board in the same as the above. (A), (b) is sectional drawing of the contact and contact cover in the same as the above. The cap in the above is shown, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a rear view, (e) is a left side view, and (f) is a right side view. is there. It is sectional drawing of the state which connected the electric wire using a cap in the same as the above. It is sectional drawing of the state which connected the electric wire using a cap in the same as the above. It is a top view of the printed wiring board in the same as the above.

Explanation of symbols

1 Upper body 2 Lower body 3 Contact 4 IDC terminal (terminal board)
4c Pressure contact slit 9 Cap 10 Plug housing 11 Terminal housing 13 Terminal plate holding part 13a Guide groove 13b Holding groove 13c Guide protrusion

Claims (9)

In a modular plug that is attached to the end of a communication cable formed by covering a plurality of wires with the same sheath and plugged into a modular jack,
It has a plurality of contacts that are in one-to-one contact with a plurality of contacts provided in the modular jack, and a connector portion that is inserted into the plug insertion port of the modular jack and a plurality of wires of the communication cable are connected one-to-one. A terminal portion having a plurality of terminals,
The terminal portion includes a plurality of terminal plates connected one-to-one with a plurality of contacts of the connector portion, and a terminal plate holding portion for holding each terminal plate,
The modular plug is characterized in that the terminal plate is provided with a pressure contact slit that is open at the tip and that breaks the insulation coating of the wire inserted from the open tip side and is pressure connected to the conductor of the wire. A cap that is detachably attached to the terminal part and covers the terminal part,
The modular plug according to claim 1, wherein the cap has a pressing portion that abuts the insulating coating of the electric wire so as to straddle the terminal plate and press-connects the electric wire to the terminal plate.   3. The modular plug according to claim 1, further comprising a printed wiring board on which a plurality of conductive patterns for electrically connecting each contact of the connector part and each terminal board of the terminal part are formed.   4. The modular according to claim 1, wherein the terminal plate holding portion has a width narrower than an outer diameter of the insulating coating and is provided with a guide groove for guiding the electric wire to the press contact slit. 5. plug. A lock claw that is provided on the outside of the connector portion so as to be elastically displaceable and prevents the connector portion inserted into the plug insertion port of the modular jack from being removed. With
The modular plug according to any one of claims 1 to 4, wherein the lock release lever is provided with a hook-shaped operation portion at a tip portion thereof.   The modular plug according to any one of claims 1 to 5, further comprising crosstalk adjusting means for adjusting crosstalk of a transmission signal transmitted between the electrically connected contact and the terminal board. The communication cable is formed by covering a sheath with a plurality of pairs of electric wires that are twisted in pairs in a twisted state,
The modular plug according to claim 6, wherein the crosstalk adjusting means adjusts the crosstalk between different polarity electric wires which are not paired among the plurality of electric wires. The communication cable is formed by covering a sheath with a plurality of pairs of electric wires that are twisted in pairs in a twisted state,
The modular plug according to claim 6, wherein the crosstalk adjusting means adjusts the crosstalk between the electric wires of the same polarity that are not paired among the plurality of electric wires. The printed wiring board has a first printed wiring board on which contacts are mounted, and a second printed wiring board on which terminal boards are mounted,
4. The first and second printed wiring boards are characterized in that the ends where the contacts and terminal boards are not mounted are overlapped in the thickness direction and the conductive patterns are electrically connected to each other. The modular plug described.

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