JPH0554936A - Moduler jack - Google Patents

Abstract

PURPOSE:To dispense with exterior attachment of a terminal resistor by setting the terminal resistor integrally in a housing. CONSTITUTION:A moduler jack main body A, a plurality of quick connection terminals 11, and a terminal resistor 8 to be connected with circuits at the end are provided in a housing 1. With this structure, the attaching from outside is not needed and the work of attaching the terminal resistor 8 becomes unnecessary. In the case that a first lead plate 22 to connect a terminal pin 25 corresponding to each circuit in the main body A and a quick connection terminal 11 by press-bonding is provided and the terminal resistor 8 is mounted on a printed substrate 9 and the connection of the terminal resistor 8 in the substrate 9 and the lead plate 22 corresponding to the circuit at the end is carried out using a second lead plate 37 attached to the substrate 9, the terminal resistor 8 can be set in the housing without using a lead wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modular jack for ISDN, and more particularly to a modular jack connected to the end of an ISDN line.

[0002]

2. Description of the Related Art ISDN (Integrated Service Digital Network or Integrated Service Digital Integrated Network) is used for telephone,
It is a digital integrated network that comprehensively handles services with different characteristics such as telegraph, telex, teletex, data, facsimile, and videotex. In ISDN,
There is one in which a plurality of modular jacks are connected to an ISDN line connected to a master unit (DSU) by, for example, a bus system, and a terminal device can be detachably connected to each modular jack.

[0003]

By the way, this kind of I
In a modular jack for SDN that is connected to the end of the ISDN line, the terminating resistor must be connected to the end of the ISDN line. In this case, the terminating resistor is conventionally connected by an external method or the like. However, the work of attaching the terminating resistor to the outside is troublesome, and the appearance is not good.

The present invention has been made in view of the above points, and an object of the present invention is to provide a modular jack which does not require the external work of a terminating resistor.

[0005]

According to the present invention, in order to achieve the above object, a modular jack body to which a modular plug is attached, and a plurality of quick-connect terminals for connecting signal lines of an ISDN line in a quick-connect manner. , A terminating resistor connected between the terminating lines is provided in the housing. In addition, in order to eliminate the internal connection using the lead wire and the like, a first lead plate for connecting the terminal pin corresponding to each line of the modular jack body and the quick connection terminal by a crimping method is provided, and the terminating resistor is provided. May be mounted on a printed circuit board, and the connection between the terminating resistor of the printed circuit board and the first lead plate corresponding to the terminating line may be performed using the second lead plate mounted on the printed circuit board.

[0006]

The present invention has the above-mentioned configuration,
The terminating resistor is integrated into the housing so that the terminating resistor does not need to be externally attached.

[0007]

1 to 4 show an embodiment of the present invention. As shown in FIG. 1, the housing 1 of the modular jack of this embodiment includes a box-shaped body 2 having an open top surface and a cover 3 attached to the opening of the body 2. The dimensions are based on the module dimensions of ready-made wall-mounted wiring equipment.

Ear pieces 4 are formed on both sides of the opening of the body 2, and a fitting hole 5 is formed in the center of the ear piece 4.
Further, locking pieces 6 are vertically provided from both sides of the cover 3, and the locking pieces 6 are inserted into the fitting holes 5 to cover the body 2 with the covers 3. .. As shown in FIG. 4A, two partitions 7 running in the longitudinal direction are formed in the lower part of the body 2, and a storage space is formed between the partitions 7. The space between each partition wall 7 and the inner peripheral surface of the body 2 has a structure in which a plurality of partition walls 10 running in the width direction are formed, and a quick-connect terminal 11 is housed in each space.

The quick-connecting type terminal 11 comprises a generally U-shaped terminal plate 12 opening downward, and a generally C-shaped locking spring 13 housed in the terminal plate 12, which is a normal quick-connecting type terminal. It has a terminal structure of. The partition 7 of the terminal plate 12 of the terminal 11
A connecting projection 16 is provided laterally from the portion facing the.
Then, as shown in FIG. 3C, an insertion hole 14 into which a signal line is inserted is formed in the lower surface of the body 2 corresponding to the housing portion of each of these terminals 11.

In this quick-connect terminal 11, the insertion hole 1
When the core wire of the signal wire stripped from 4 is inserted, the core wire is elastically sandwiched between the terminal wire 12 and the terminal plate 12 by the spring force of the locking spring 13, and the connection between the terminal 11 and the signal wire is performed. The locking piece formed on the locking spring 13 is locked to the core wire to prevent the signal line from coming off. Here, in this embodiment, two insertion holes 1 corresponding to each terminal 11 on the bottom surface of the body 2 are provided.
4 is formed with a release piece 15 which can be elastically pressed inward, and by pushing the release piece 15 inward, the state in which the locking piece of the locking spring 13 locks the core wire is released. It can be removed.

On the terminal 11 is mounted, a middle body 17, a modular insert block 18, and a middle cover 19 which constitute a so-called modular jack body A are housed. The modular insert block 18 is formed by resin-molding the central portion of the plurality of terminal pins 25 from above, and the tips of the respective terminal pins 25 are bent obliquely downward.

The middle body 17 has an opening 20 formed at the center for inserting the modular insert block 18,
The terminal pins 25 of the modular insert block 18 inserted into the openings 20 are bent laterally along the grooves 21 formed on the lower surface of the middle body 17. And
The bent terminal pin 25 is fixed by the lead plate 22.

Here, the lead plate 22 is formed of a conductive member, and has two projecting pieces 23 protruding from the upper and lower ends, respectively.
The lead plate 22 is attached by press-fitting the projecting piece 23 into the press-fitting hole 24 of the middle body 17 formed at a position corresponding to each of the grooves 21 and in a direction intersecting at right angles with the forming direction of the groove 21. .. At this time, the terminal pin 25 is placed between the protruding pieces 23.
Is inserted and connection with the terminal pin 25 is made.

The middle cover 19 is in the shape of a rectangular box whose lower surface is closed, has an opening 26 for inserting a modular plug formed in one side of the upper surface, and accommodates the modular insert block 18 in the other side. Here, as shown in FIG. 4A, an elastic locking piece 28 is formed in the resin portion 27 of the modular insert block 18, and when the elastic locking piece 28 is inserted into the inner cover 19, the elastic locking piece 28 is formed. Locking hole 2 of middle cover 19
It has a structure that is locked to 9 and prevented from coming off. Further, inside the middle cover 19, a holding piece 30 for holding an angle of a portion of the terminal pin 25 bent obliquely downward is provided.

Locking projections 31 are formed on the lower portions of both end surfaces of the middle cover 19, and engaging claw pieces 32 that elastically engage with the locking projections 31 are provided on the upper surface of the middle body 17. I am doing it. Here, since the middle body 17 and the middle cover 19 are made of synthetic resin, the engagement claw pieces 32 and the engagement protrusions 31 are elastically fitted to each other so that the middle cover 17 can be attached. By the way, the assembly of the middle body 17, the modular insert block 18, the middle cover 19, and the lead plate 22 is performed before the assembly into the body 2, and is housed in the body 1 as the modular jack body A. At this time, the protruding piece 23 of the lead plate 22
And the connecting protrusion 16 of the terminal plate 12 of each terminal 11.
Therefore, the terminal 11 and the modular jack body A are installed at the same time when the modular jack body A is installed.
The connection with is made. At this time, the protruding piece 23 of the lead plate 22
4 and the fitting state of the connection projection 16 of the terminal board 12 is shown in FIG.
It shows in (a).

The cover 3 has a box-like shape with an open lower surface, and the ear portions 33 projecting from the lower portions on both sides are detachably attached to a mounting frame made of synthetic resin which is used when a ready-made wiring device is embedded in a wall surface. A claw piece 33 for mounting is provided so as to project laterally.
Further, a fitting hole 34 for attaching to a metal mounting frame is formed at the base of the ear 33. That is, the modular jack of this embodiment can be embedded in the same manner as when a ready-made wiring device is embedded in the wall surface.

An insertion port 35 for inserting a modular plug is formed on the upper surface of the cover 3. Here, the insertion port 35 has a structure in which a door 36 in which two members are combined to reduce the storage space is attached and the insertion port can be closed when not in use. The above explanation is ISD
Although the description has been made for the common parts other than the one connected to the terminal of the N line, the present embodiment has the following structure in addition to the above structure. That is, in this embodiment, the terminating resistor 8 is built in the modular jack.

Here, the terminating resistor 8 is mounted on a printed circuit board 9 as shown in FIG. 1, and a substantially Z-shaped lead plate 37 shown in FIG. 2 is attached to the printed circuit board 9 by soldering. .. The lead plate 37 attached to the printed board 9 is, as shown in FIGS. 2 and 4 (c),
It is caulked and connected to the dowel 38 formed on the lead plate 22 corresponding to the terminating line. The printed circuit board 9 thus attached is hung from the center of the modular jack body A as shown in FIG. 4A. When the modular jack body A is housed in the body 2, the printed circuit board 9 is
Fits in the storage space between the partition walls 7.

If the terminating resistor 8 is built in the modular jack as described above, it is not necessary to attach the terminating resistor 8 externally, the troublesome work of attaching the terminating resistor 8 is not necessary, and the appearance is good. Further, there is an advantage that there is no fear of mistakenly connecting the line to which the terminating resistor 8 is connected as in the case of external attachment. However, since the outer shape of this embodiment is exactly the same as that of the other modular jacks, it may be mistaken for the other modular jacks. Therefore, it is preferable to display on the upper surface of the cover 3 that it is a modular jack used for the terminal end, as shown in FIG.

[0020]

As described above, the present invention is connected between a modular jack body to which a modular plug is attached, a plurality of quick connect terminals for connecting signal lines of an ISDN line in a quick connect manner, and a terminating line. Since the terminating resistor is provided in the housing, the terminating resistor is integrally incorporated in the housing, and it is not necessary to attach the terminating resistor to the outside. For this reason, the troublesome work of externally attaching the terminating resistor is not necessary, and the appearance is good, and there is no fear of mistakenly connecting the line to which the terminating resistor is connected as in the case of the external attaching.

Further, a first lead plate for connecting a terminal pin corresponding to each line of the modular jack body and a quick-connect terminal to each other by a crimping method is provided, and the terminating resistor is mounted on the printed circuit board. If the connection between the terminating resistor and the first lead plate corresponding to the terminating line is made by using the second lead plate attached to the printed circuit board, it is possible to eliminate the internal connection using the lead wire or the like. ..

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method of connecting the printed board and the lead plate of the above.

3A to 3C are a front view, a plan view, and a bottom view in which a part of a modular jack is cut away.

4A to 4C are a side sectional view of a modular jack, a plan view with a cover removed, and a rear view with a part cut away.

[Explanation of symbols] A Modular jack body 1 Housing 8 Terminator 9 Printed circuit board 11 Terminals 22,37 Lead plate 25 Terminal pins

Claims (2)

[Claims] 1. A modular jack body to which a modular plug is mounted, a plurality of quick-connect terminals for connecting signal lines of an ISDN line in a quick-connect manner, and a terminating resistor connected between terminating lines in a housing. A modular jack that is equipped with. 2. A first lead plate for connecting a terminal pin corresponding to each line of the modular jack body and a quick-connect terminal by a crimping method, wherein the terminating resistor is mounted on a printed circuit board, 2. The modular jack according to claim 1, wherein the connection between the terminating resistor and the first lead plate corresponding to the terminating line is made by using the second lead plate attached to the printed circuit board.