JPH05109448A - Modular jack for isdn - Google Patents

Abstract

PURPOSE:To prevent the connection error of a terminal resistance and suitably receive the terminal resistance in a case by preliminarily providing a resistance mounting part for mounting the terminal resistance. CONSTITUTION:A plug insert hole 17a for inserting a modular plug is opened on the circumferential surface of a case. The modular plug inserted from the plug insert hole 17a is electrically connected to the plug connecting part 41 of a modular insert 40. A base 10 has a mounting base 3 which is a resistance mounting part for mounting a terminal resistance 2. When the modular insert 40 is mounted on the base 10, the lead plate 46 of the modular insert 40 is connected to the terminal resistance 2. A case 1 is mounted on a constructing surface by a mounting screw inserted through the base 10 in the form making contact with the surface of the constructing surface such as a wall surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an I for connecting terminals in an integrated services digital network (ISDN).
The present invention relates to a modular jack for SDN.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6 and FIG.
In order to connect the terminal device DTE for SDN to the home line termination device DSU, etc., the modular jack A is connected to the home line termination device DSU, and the modular plug B connected to the terminal device DTE is connected to the modular jack A. Is being done. In this case, it is required to connect a terminating resistor to the modular jack A located at the end. That is, when a plurality of modular jacks A are connected by feed wiring as shown in FIG. 6, a terminating resistor is connected to the modular jack A at the right end, and only one modular jack A is provided as shown in FIG. If provided,
A terminating resistor will be connected to the modular jack A.

[0003]

Since the conventional modular jack does not have a resistance mounting portion for mounting the terminating resistor, it is common to connect the terminating resistor to the terminal portion for connecting the electric wire. there were. That is, since the mounting of the terminating resistor is handled exceptionally, there is a problem that the mounting position of the terminating resistor is difficult to understand, a connection error occurs, and the terminating resistor is not well fitted.

The present invention is intended to solve the above-mentioned problems, and it is assumed that a terminating resistor is to be mounted in advance, and a resistor mounting portion for mounting the terminating resistor is provided to prevent erroneous connection of the terminating resistor. ISD that allows terminating resistors to fit and be arranged well
It aims to provide a modular jack for N.

[0005]

In order to achieve the above object, a plug connecting portion electrically connected to a modular plug inserted through a plug insertion opening opened in a peripheral surface of a case. In a modular jack for ISDN having a modular insert with a built-in case, the case is formed in such a shape that it is attached to the construction surface by the attachment means in contact with the surface of the construction surface such as a wall surface, and is terminated in the case. The resistance mounting portion for mounting the resistance is provided.

According to the second aspect of the invention, in addition to the structure of the first aspect, the case covers the base on which the modular insert is mounted and abuts the construction surface, and the surface of the base opposite to the construction surface. It has a cover that is detachably fitted to the base, a resistance mounting part is provided on the back surface of the base, and an exposed window that allows the resistance mounted on the resistance mounting part to be viewed from the front surface of the base penetrates through the front and back of the base. It is formed in the shape of.

According to the third aspect of the invention, in addition to the structure of the first aspect, the case covers the base on which the modular insert is mounted and abuts against the construction surface, and the surface of the base opposite to the construction surface. It has a cover that is detachably fitted to the base, and a mounting screw that is a mounting means that is screwed into the construction surface is introduced in the center of the surface of the base, and the wire connected to the modular insert is wrapped around the outer peripheral surface. That is, the cylindrical holding cylinder is provided so as to project.

According to a fourth aspect of the present invention, in addition to the structure of the third aspect, a portion of the outer surface of the distal end portion of the holding cylinder on the side opposite to the side where the electric wire connected to the modular insert is introduced into the case. Is a substantially L-shaped binding protrusion that projects radially from the holding cylinder and has a tip bent toward the base side. The electric wire wound around the outer peripheral surface of the holding barrel is connected to the binding protrusion and the base. It is held to and from the surface of.

[0009]

According to the structure of the first aspect, the case is formed so as to be attached to the construction surface such that it comes into contact with the surface of the construction surface such as the wall surface, and the terminating resistance is Since the resistance mounting part to be mounted is provided inside the case, if a terminating resistance is required when connecting as a termination, it is possible to arrange the terminating resistor well by mounting the terminating resistance on the resistance mounting part. Since the position where the terminating resistor is attached is fixed, the erroneous connection of the terminating resistor can be prevented.

According to the second aspect of the present invention, the case is composed of the base and the cover, the resistance mounting portion is provided on the back surface of the base, and the exposure window that allows the terminating resistance to be visually recognized is penetrated through the front and back surfaces of the base. Since it is formed so that it can be checked for the presence of a terminating resistor by removing the cover and looking through the exposed window, it is possible to check whether it is a termination at the time of expansion work etc. to prevent misconnection. You can do it.

According to the third aspect of the present invention, since the holding cylinder is provided at the center of the surface of the base and the mounting screw is introduced into the holding cylinder, the base can be fixed to the work surface by one mounting screw. It has an advantage that it can be installed and the installation work is easy. Also, by winding the electric wire to be connected to the modular insert around the outer peripheral surface of the holding tube, the electric wire can be beautifully finished, and even if tension is applied to the electric wire, tension is applied to the connecting portion connecting the electric wire and the modular insert. It can be prevented from acting.

According to the structure of claim 4, since the electric wire wound around the outer peripheral surface of the holding cylinder is held between the binding projection provided on the tip of the holding cylinder and the surface of the base, the electric wire is wound around the holding cylinder. Since the electric wire is prevented from unraveling from the holding tube, the electric wire can be finished more beautifully.

[0013]

【Example】

(Embodiment 1) As shown in FIG. 1, a case 1 includes a base 10 which is attached so as to be in contact with a surface of a construction surface such as a wall surface,
The base 1 covers the front surface of the base 10 (the lower surface side in FIG. 1).
It is composed of a cover 20 that is detachably fitted to the 0 and a back cover 30 that is fitted to the back surface of the base 10.

As shown in FIG. 2, the base 10 has a peripheral wall 11 projecting to the back side over substantially the entire circumference of the rectangular outer peripheral edge, and for introducing an electric wire formed in one place of the peripheral wall 11. Cutout 12
An electric wire from outside is introduced through. Further, an electric wire insertion hole 13 penetrating the front and back of the base 10 is opened in the vicinity of the electric wire introduction notch 12, and the electric wire introduced from the electric wire introduction notch 12 passes through the electric wire insertion hole 13 to the surface side of the base 10. It is designed to be pulled out. The back cover 30 is the back surface of the base 10 and is the wire insertion hole 1
It engages with the base 10 so as to cover a portion different from 3, and a plurality of partitions divided by the partition rib 14 are formed in the portion covered by the back cover 30. The central compartment is a main storage chamber 15a that houses the modular insert 40 having a plug connection portion 41 that is electrically connected to the modular plug, and four sections are provided on each side of the main storage chamber 15a. Is divided into small compartments, and each small compartment serves as a terminal storage chamber 15b. That is,
Eight terminal storage chambers 15b are provided in total. Main storage room 1
An insertion hole 16 for inserting the plug connection portion 41 of the modular insert 40 is opened in a part of 5a, and a portion corresponding to the insertion hole 16 on the front surface side of the base 10 has the insertion hole 16
A main storage protrusion 17 is provided so as to surround the plug connection portion 41 of the modular insert 40 that protrudes to the front surface side of the base 10. Further, on the front surface side of the base 10 corresponding to the terminal accommodating chamber 15b, a terminal accommodating protrusion 18 that surrounds the terminal 50 accommodated in the terminal accommodating chamber 15b is provided in a protruding manner.
Further, in the main storage chamber 15a, two sets of mounting bases 3 as resistance mounting portions for mounting the terminating resistor 2 arranged between the base 10 and the modular insert 40 are provided in a protruding manner. A substantially U-shaped positioning recess 3a is formed at the front edge of the mounting base 3, and an insertion groove 3b that opens to the front end surface is formed in the mounting base 3.

As shown in FIG. 1, the cover 20 has a peripheral wall projecting to the back surface side over substantially the entire circumference of the rectangular outer peripheral edge, and a knockout portion is provided at a portion corresponding to the wire introduction notch 12. The electric wire introduction part 22 is formed. Further, in the vicinity of the electric wire introducing portion 22, an electric wire introducing concave portion 22a is formed at the tip edge of the peripheral wall. Therefore, when the base 10 is attached to the construction surface, the flat electric wire is attached to the case 1
When it is introduced into the wire, it may be passed through the electric wire introduction recess 22a,
In addition, when introducing the round wire into the case 1, the wire introducing portion 2
You just need to divide it by 2 and pass it through. A cutout portion 23 that exposes one surface of the main storage protrusion 17 is formed in a portion of the peripheral wall of the cover 20 corresponding to the main storage protrusion 17. Main storage stand 17
A plug insertion port 17a into which the modular plug is inserted is opened at a portion exposed from the notch 23. The cover 20 engages with a coupling protrusion 19 a provided on a coupling piece 19 projecting near the corner of the front surface of the base 10 and a coupling protrusion 24 formed on the inner peripheral surface of the peripheral wall of the cover 20. The base 10 is detachably coupled.

As shown in FIG. 2, the modular insert 40 is formed in a flat plate shape with a plug connecting portion 41 having eight contact springs (not shown) which elastically contact with the contacts of the modular plug. The electric wire connecting portion 42 accommodated in the main accommodating chamber 15a is provided, and is formed by insert molding a conductive member into a base 43 made of synthetic resin. Eight lead plates 44 of a substantially L shape, which are electrically connected to the respective contact springs, are projectingly provided on both side surfaces of the wire connecting portion 42. Each lead plate 44 is formed with a pressure contact slit 44a which is open to the front edge. Further, two notches 45 are formed on each side edge of the wire connecting portion 42, and each notch 45 is provided with a resistance lead plate 46 having the same shape as the lead plate 44. That is, the resistance lead plate 46 is formed in a substantially L shape, and is provided with the pressure contact slit 46a which is open to face the tip edge.

The terminal 50 is a terminal frame 5 formed in a substantially U shape.
1 is a well-known quick-connecting terminal in which a pair of locking springs 52 made of leaf springs are provided in the locking spring 52, and the locking spring 52 bites into an electric wire inserted between the terminal frame 51 and the locking spring 51. It is equipped with a locking piece that prevents it from coming off and a contact piece that elastically contacts the electric wire. A connection piece 53 is provided on the center piece of the terminal frame 51 so as to be orthogonal to one of the leg pieces, and the tip of the connection piece 53 is a partition between the main storage chamber 15a and the terminal storage chamber 15b. Through the guide groove 14a formed in the rib 14, the main storage chamber 15
is introduced into a. That is, the tip end of the connecting piece 53 is introduced into the pressure contact slit 44a of the connecting piece 44 provided on the modular insert 40, so that the contact spring of the modular insert 40 and the terminal 50 are electrically connected. As shown in FIG. 3, electric wires are attached to the terminal frame 51 and the locking spring 5 on the tip end surface of the terminal housing projection 18 surrounding the terminal 50.
A pair of wire insertion holes 18 a for introducing the wire between the terminals 2 is formed for each terminal 50. In addition, a release piece 18b that can push a portion near the electric wire insertion hole 18a into the inside of the terminal accommodating protrusion 18 is integrally formed on a part of the peripheral wall of the terminal accommodating protrusion 18. In the state where the electric wire is sandwiched between the terminal frame 51 and the locking spring 52, the unlocking piece 18b is pushed into the terminal accommodating projection 18 to bend the locking spring 52 with a part of the unlocking piece 18b. The engagement state with the electric wire is released so that the electric wire can be easily pulled out.

A plug insertion opening 17 provided on the main storage projection 17
a and a plug connection portion 41 provided on the modular insert 40
A door 60 that opens and closes the plug insertion opening 17a is provided between and. The door 60 includes a pair of door bodies 61 and 62, and a pair of return springs 63 that are coil springs that bias one door body 62 in a closing direction. That is, by slidably introducing both side portions of both door bodies 61 and 62 into a guide groove (not shown) formed in the main storage protrusion 17 in parallel with the opening surface of the plug insertion opening 17a, Both door bodies 61 and 62 are arranged so as to move in the front and back directions of the base 10, and the door body 61 farther from the surface of the base 10 is biased by the return spring 63 in the direction away from the surface of the base 10. Of. Spring receiving pieces 62a, which the return spring 63 contacts, are provided on both side edges of the door body 62 in a protruding manner. Further, the door body 61 is disposed on the outer surface side of the door body 62, and a pressing piece 62b is provided on the outer surface side of the door body 62 so that the pressing piece 62b contacts the door body 61 when the door body 62 is opened. The door body 61 is also opened at the same time by making contact. On the other hand, connect the modular plug to the plug insertion port 17
When it comes out of a, the spring force of the return spring 63 causes the door 62
Moves toward the closing direction, and the engaging piece 62c provided on the door 62
The door body 61 engaged with the door body 62 is pulled by the door body 62, so that the door body 61 is also closed. Door body 6
The movement range of 1, 62 is restricted, and the plug insertion port 1
Stop at the position where 7a is closed.

When used as a relay, the terminating resistor 2 is unnecessary, but when used as a terminating end, it is necessary to connect the terminating resistor 2. When connecting the terminating resistor 2, the lead wire 2a of the terminating resistor 2 is placed in the positioning recess 3a of the mounting base 3 and then the modular insert 4 is inserted.
The 0 lead plate 46 may be inserted into the insertion groove 3 b of the mounting base 3. As a result, the lead wire 2a is pressed into the press contact slit 46a formed in the lead plate 46, and the terminating resistor 2
Are electrically connected to the modular insert 40. Here, although two terminating resistors 2 are provided, an exposed window 4 penetrating to the front and back is formed in a portion of the base 10 corresponding to one terminating resistor 2. Therefore, if the cover 20 is removed with the terminating resistor 2 arranged on the back surface of the base 10, the terminating resistor 2 can be visually recognized through the exposure window 4.

When the case 1 having the above structure is attached to a construction surface such as a wall surface, the mounting screws 5 are screwed into the construction surface through the mounting holes 7 penetrating the front and back of the base 10 (see FIG. 5). Since the mounting hole 7 is formed in the central portion of the base 10, the case 1 can be fixed to the construction surface with one mounting screw 5. A cylindrical holding cylinder 6 is provided so as to project around the mounting hole 7 and on the front side of the base 10. By providing the holding cylinder 6 as described above, after the electric wire pulled out to the front surface side of the base 10 through the electric wire introduction notch 12 and the electric wire insertion hole 13 is wound around the outer peripheral surface of the holding cylinder 6, the terminal housing projection 18 is provided. If the wire is inserted into the wire insertion hole 18a provided on the front end surface of the wire, even if tension is applied to the wire, no tension is applied to the connecting portion between the wire and the terminal 50, and the holding cylinder 6 functions as a tension stopper. Can have.

(Embodiment 2) In this embodiment, as shown in FIGS. 4 and 5, a substantially L-shaped bundling projection 8 is provided on the outer surface of the distal end portion of the holding cylinder 6, The tip of the binding protrusion 8 is bent in a direction approaching the base 10. Further, the bundling projection 8 is provided on the side opposite to the wire insertion hole 13 in the radial direction of the holding cylinder 6. Therefore, when the electric wire 9 introduced from the electric wire insertion hole 13 is wound around the holding tube 6, the electric wire 9 is held between the binding protrusion 8 and the surface of the base 10, so that the electric wire 9 is held. 6 can be prevented from falling off, and the function as a tension stopper can be further enhanced. Although the exposure window 4 is not provided in this embodiment, the exposure window 4 may be provided. The other configuration is similar to that of the first embodiment, and thus the description is omitted.

[0022]

According to the invention of claim 1, the case is formed so as to be attached to the construction surface such that it comes into contact with the surface of the construction surface such as a wall surface, and the terminating resistor is attached to the construction surface. Since the resistance mounting part to be mounted is provided inside the case, if a terminating resistance is required when connecting as a termination, it is possible to arrange the terminating resistor well by mounting the terminating resistance on the resistance mounting part. Since the position where the terminating resistor is attached is determined, there is an effect that misconnection of the terminating resistor can be prevented.

According to the second aspect of the present invention, the case is composed of the base and the cover, the resistance mounting portion is provided on the back surface of the base, and the exposure window for visually recognizing the terminating resistance is penetrated through the front and back surfaces of the base. Since it is formed on the ground, you can check the presence or absence of the terminating resistance by removing the cover and looking through the exposed window, and you can prevent misconnection by checking whether it is the termination or not when performing expansion work etc. There are advantages.

According to the third aspect of the present invention, since the holding cylinder is provided at the center of the surface of the base and the mounting screw is introduced into the holding cylinder,
Since the base can be fixed to the construction surface by the mounting screw of the book, there is an advantage that the mounting construction is easy. Also, by winding the electric wire to be connected to the modular insert around the outer peripheral surface of the holding tube, the electric wire can be beautifully finished, and even if tension is applied to the electric wire, tension is applied to the connecting portion connecting the electric wire and the modular insert. The effect that it can prevent acting is produced.

According to the fourth aspect of the present invention, since the electric wire wound around the outer peripheral surface of the holding cylinder is held between the binding protrusion provided at the tip of the holding cylinder and the surface of the base, the electric wire wound around the holding cylinder is held. Is prevented from unraveling from the holding cylinder,
There is an effect that the electric wire can be finished more beautifully.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment.

FIG. 2 is an exploded perspective view of the first embodiment excluding a cover and a back cover.

FIG. 3 is a front view of the first embodiment with a cover removed.

FIG. 4 is a front view of the second embodiment with a cover removed.

FIG. 5 is a cross-sectional view of a main part of the second embodiment.

FIG. 6 is a diagram showing an example of use of an ISDN modular jack according to the present invention.

FIG. 7 is a diagram showing another usage example of the modular jack for ISDN according to the present invention.

[Explanation of symbols]

 1 Case 2 Termination Resistor 3 Mounting Base 4 Exposed Window 5 Mounting Screw 6 Holding Tube 8 Bundling Protrusion 10 Base 20 Cover 17a Plug Insertion Port 40 Modular Insert 41 Plug Connection Part

Claims (4)

[Claims] 1. A modular jack for ISDN having a modular insert having a plug connection portion electrically connected to a modular plug inserted through a plug insertion opening formed in the peripheral surface of the case, wherein the case is a wall surface. I is characterized in that a resistance mounting portion is formed in a shape in which the mounting means is attached to the construction surface so as to be in contact with the surface of the construction surface.
Modular jack for SDN. 2. The case comprises a base on which the modular insert is mounted and which abuts on the construction surface, and a cover which is detachably fitted to the base so as to cover the surface of the base opposite to the construction surface. The resistance mounting portion is provided on the back surface of the base, and an exposed window that allows the resistance mounted on the resistance mounting portion to be viewed from the front surface of the base is formed so as to penetrate the front and back surfaces of the base. Modular jack for ISDN described. 3. The case comprises a base on which the modular insert is mounted and which abuts on the construction surface, and a cover which is detachably fitted to the base so as to cover the surface of the base opposite to the construction surface. In the center of the surface of the base, a mounting screw that is a mounting means to be screwed into the construction surface is introduced, and a cylindrical holding cylinder around which the electric wire connected to the modular insert is wound around the outer peripheral surface is projected. The modular jack for ISDN according to claim 1. 4. The outer surface of the tip of the holding cylinder, which is on the side opposite to the side where the electric wire connected to the modular insert is introduced into the case, has a tip protruding radially from the holding cylinder and having a tip. It is characterized in that a binding protrusion formed in a substantially L shape that bends toward the base side is provided so as to project, and the electric wire wound around the outer peripheral surface of the holding cylinder is held between the binding protrusion and the surface of the base. The modular jack for ISDN according to claim 3.