JPS63126181A - Telephone modular jack - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a telephone modular jack having a modular block in a casing to which a plug is detachably connected.

[Background Art] Conventionally, as shown in FIG. 6, this type of telephone modular jack has a plug insertion opening 4 on the front surface of a casing 1 formed to have the same dimensions as one module of a wiring device.
are provided with the following. As shown in FIG. 7, this telephone modular jack has a modular block 2 mounted inside a casing 1.
The lead #i6 pulled out further is fixed to the terminal board 7 by soldering. As shown in FIG. 8, the modular block 2 is constructed by crimping a crimping part 28 provided at one end of a lead wire 6 onto a contact pin 24 inserted into a block body 27 of a molded product, and pulling out the lead wire 6. There is. In this way, conventionally provided telephone modular jacks require crimping work between the lead wire 6 and the contact pin 24,
Since it is necessary to solder the terminal board 7 to the lead Aa6, it takes a lot of time, and since there are many connection points, it is difficult to obtain reliable connections.

On the other hand, when this type of telephone modular system is used in future digital communications, it is expected that signal leakage between terminals will become a problem.

In other words, the current telephone modular jack has a maximum of 6
It is equipped with 4 wires, and each line uses a pair of lines, so up to 3 lines can be used, so you can use one line as a voice line and the remaining two as signal lines, or It is possible to use one line as a voice line and the remaining line as a signal line, and it is being considered for use in so-called home bus systems. When a plurality of lines are provided close to each other in this manner, problems arise such as signal leakage due to electrostatic coupling due to capacitance existing between terminals, etc., and electromagnetic coupling between each line.

For example, the conventional terminal specifications are shown in Figure 9, C1,,,1,2>,(12,,1,2>,(1
3, 132) are connected to a pair of lines of the same line. In this case, focusing on the terminal f11, since the distance between the terminals 121 and 122 is different, the capacitance becomes unbalanced and signal leakage occurs. In addition, if only two lines are used, as shown in Figure 10, (111, 42,), <1
= 2-122) can be connected to a pair of lines of the same line, and in this case, if we pay attention to terminal 111, we can see that the distances between terminals 11□ and 122 are approximately equal. Therefore, it is thought that signal leakage will be relatively reduced. However, considering the current situation where the two center pins of the contact pins are used as audio lines, the terminal arrangement shown in Figure 10 will cause the lead wires to cross, resulting in signal leakage between the lead wires. becomes a problem. Attempts to prevent signal leakage between lead wires pose problems in that manufacturing is difficult and costs are high.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and the object thereof is to make the capacitance between the terminals connected to the lines of each line approximately equal, thereby increasing the capacitance between the terminals. An object of the present invention is to provide a modular telephone system that reduces signal leakage between terminals.

[Disclosure of the Invention] (Structure) The telephone modular jack according to the present invention includes a modular block in the casing to which a plug inserted through a plug insertion opening opened on one side of the casing is detachably connected. In a telephone modular jack that has a terminal section that is electrically connected to the contact pin of the block, the terminal section is a terminal that is connected to the line on one side of the casing opposite to the plug insertion hole, and is connected to a pair of terminals. Equipped with multiple pairs of terminals each connected to multiple lines consisting of railroad tracks, each pair of terminals is modular.
They are arranged symmetrically with respect to a plane passing through the center of the block and orthogonal to the arrangement direction of the contact pins of the modular block, and each terminal is arranged approximately at the center of one side of the casing to which the line is connected. By arranging the terminals of adjacent lines so that the distance between them is approximately equal,
This reduces signal leakage.

(Example) As shown in PIS 1 and 2, a telephone modular jack includes a casing 1 consisting of a body 11 and a cover 12, a modular block 2 and a terminal block 3 housed in the body 11, and a casing. A door 26 arranged to cover the plug insertion port 4 provided on the front side of the
and casings 1 and 7.
5% 26 is made of an insulating material such as synthetic FL (JJIlr).The external dimensions of the casing 1 are the dimensions equivalent to one module of the wiring module, which is standardized so that it can be attached to a ready-made mounting frame. As will be described later, the wiring device can be attached to a ready-made mounting frame for attaching the module.Outer flange pieces 13 are extended from the left and right sides of the body 11, respectively. At the same time, a locking recess 14 is formed at the tip of each outer flange piece 13 6 In addition, outer flange pieces 1 are formed at both left and right ends of the cover 12 .
7 is extended, and a connecting leg piece 16 having a 77 groove 15 at the tip end is extended to the tip of each outer flange piece 17, and the 7 hooks 15 of the connecting leg piece 16 are inserted into the locking recesses. By being engaged with 14, the body 11 and the cover 12 are coupled together.

Inside the body 11, there are 4 partitions on the left and right by 3 partition pieces 51 and 52.
It is divided into compartments, and the two central compartments are further divided into 5 partitions.
It is divided into 3 sections by 4, and terminal block 3 is divided into 1
Six terminal storage chambers 53 are formed, each having a size that allows each terminal to be stored therein. The cover 12 has a plug insertion opening 4 that opens at the center of its front surface, and a pair of locking claw pieces 62 are protruded from the tip edges of the left and right outer flange pieces 17 of the cover 12. . Further, a locking hole 63 is formed at the base of the outer flange piece 17. The plug insertion port 4 has a rectangular shape and has a q-large portion 64 formed in a two-step staircase shape. When the cover 12 is connected to the body 11, a space with an appropriate thickness is formed between the front surface of the modular block 2 attached to the body 11 and the opening periphery I and rear surface of the plug insertion port 4 of the cover 12. A holding rib 25 is provided on the cover 12 in a protruding manner.

The mono error block 2 is purchased with a contact pin block 22 and a middle frame 23, and the contact pin block 22 and the middle frame 23 are mainly made of an insulating material such as synthetic resin. A comb blade is provided in the middle frame 23 to separate contact pins 24, which will be described later. The contact pin block 22 has a plurality of spring wires (
Six (6) contact pins 24 are inserted and provided, and a portion of each contact pin 24 protrudes from the side surface of the contact pin block 22 as a connecting piece 19. By fitting the middle frame 23 into this contact pin block 22, the mononilar block 2 is formed, and the contact pin 24 is located in the plug insertion hole 22 formed in the middle frame 18, and a plug (not shown) is formed. When the plug is inserted through the plug insertion opening 4 opened on the front surface of the casing 1, each contact pin 24 comes into elastic contact with the corresponding contact of the plug, so that they are electrically connected to each other.

The terminal block 3 consists of a U-shaped terminal frame 31 made of conductive material and a locking spring 32 mounted inside the terminal frame 31. A slit 33 is formed in one leg of the terminal frame 31. A locking piece 34 is provided at the center of the other leg piece by cutting and bending, and a connecting protrusion 35 is provided at the center of the terminal block 3 by cutting and bending. The connecting protrusion 35 has a slit 3 opened facing the tip edge.
It has 8. The locking spring 32 has a shape in which a pair of locking pieces 36a, 36b are formed by bending a sheet metal, and each of the locking pieces 36a, 36b has a ring) 37a,
37b is formed. When the locking spring 32 is installed inside the terminal frame 31, the locking spring 37a is closed.

The proximal end of 37b is locked to the locking piece 34, and the locking spring 32
is held in the terminal frame 31 so that it can be made into a block, and the terminal frame 31 and locking spring 32 are integrated to form the r-shaped terminal block 3.

Thus, the terminal block 3 is housed in each terminal storage chamber 53 of the body 11. After the terminal block 3 is assembled into the body 11 in this way, the terminal block 1
The mono error block 2 is housed in the body 11 from above 1, and the connecting piece 19 is provided at a position corresponding to the connecting protrusion 35, so if the connecting piece 19 is press-fitted into the slit 38, the connecting piece 19 An electrical connection is made between the terminal frame 31 and the terminal frame 31. Therefore, there is no need to wire lead wires, and the terminal block 3 can be inserted into the casing 1.
By assembling the modular block 2, the contact pins 24 of the modular block 2 can be connected to the terminal block 3, and assembly can be easily automated.

In particular, since the assembly can be carried out by assembling the terminal block 3 into the body 11 from above, as well as the modular block 2 from above, and then covering the cover 12 from above, the assembly can be carried out by assembling from the same direction. This makes it easier to automate assembly. Furthermore, by automating the assembly in this way, the assembly method becomes constant, and as a result, the reliability of the connection between the modular block 2 and the terminal block 3 can be improved. Note that when the terminal block 3 is integrated, the terminal storage chamber 53
Although the locking spring 32 and the terminal frame 31 are installed separately, they may be installed in the terminal storage chamber 53 one after another.

On the bottom of the body 11 are the leg pieces of the terminal frame 31 and the locking spring 3.
A wire insertion port (not shown) is provided at a corresponding position between the locking pieces 36a and 36b of No. 2, and a release piece (not shown) is provided adjacent to the wire insertion port. ing. The release piece is provided at a position where it can come into contact with the lock piece 36b of the lock spring 32. When connecting a telephone line, insert the telephone line into the wire insertion slot and the telephone line will be held between the lock pieces 36a, 36b and the legs of the terminal frame 31, and when disconnecting the telephone line, operate the release piece. and lock spring 32 to terminal frame 31.
The telephone line can be easily removed by bending it away from the legs.

Incidentally, a door 26 is attached to the plug insertion opening 4 to prevent dirt and the like from entering the casing 1 from the plug insertion opening 4 when no plug is inserted. door 2
6 is composed of a pair of upper and lower bodies 41 and 42, and is designed to be installed in the space between the face of the modular block 2 and the rear surface of the opening periphery of the plug insertion opening 4 of the cover 12.

A working piece 43 is provided protruding from the lower door body 42, and the working piece 43
The width dimension is set to be approximately equal to the width dimension of the minimum width part of the notch part 64 of the plug insertion opening 4, and the protrusion dimension of the operation piece 43 is set to such an extent that it protrudes slightly from the front surface of the cover 12. In this way, the upper door body 41 closes half of the plug insertion opening 4, and the lower door body 42 closes the other half of the plug insertion opening 4. When inserting a plug into the plug insertion opening 4, the plug is brought into contact with the operating piece 43 and the operating piece 43 is pushed to move the lower door body 42 upward. When the working piece 43 comes into contact with the lower edge of the upper door body 41, the upper door body 41
moves upward together with the lower door body 42, the plug insertion opening 4 is opened, and the plug can be inserted into the plug insertion opening 4. Conversely, if you remove the plug from the plug insertion slot 4, both door bodies 4
1.42 falls downward under its own weight, and the plug insertion port 4 is automatically closed. That is, when inserting a plug, opening the door 26 and introducing the plug into the plug insertion port 4 are performed in a series of operations, and conversely, when the plug is removed, the door 26 is automatically closed.

The telephone modular jack constructed as described above has a terminal arrangement as shown in FIG. 3 on the back side of the casing 1. That is, the terminals Zll to ff132 are arranged in a concentrated manner at the center of the back surface of the casing 1, and each line is connected to the terminal pair C1x-1+□), <121-1t□), (11!
:ll.

1, 2), the distance between the terminal of each line and a pair of terminals of an adjacent line becomes approximately equal. Therefore, the capacitance between each line is approximately balanced, and signal leakage is reduced. As shown in FIG. 4, the distance d between the terminals of the same line and the pressure between the terminals of the adjacent line j? d6
It is necessary to set such that d, < d, and the optimum value is obtained when 2d5=d.

The telephone modular jack constructed as described above can be attached to a ready-made mounting frame 71 to which a wiring device monoale as shown in the fjSs diagram can be attached. The mounting frame 71 is made of synthetic resin and has dimensions such that it can hold three wiring device modules vertically side by side. A pair of locking holes 73 are drilled in the left vertical frame 72 of the mounting frame 71 at positions corresponding to the mounting positions of each wiring device module, and in the right vertical frame 74, each pair of locking holes 73 corresponds to the mounting positions of the Moneur for each wiring device. Side frames 75 are provided at positions spaced apart from the right vertical frame 74, respectively. A release piece 76 is protruded from the center of each side frame 75, and a holding hole 7 surrounded by the right vertical frame 74, side frame 75, and release piece 76 is provided on both sides of the release piece 76.
7 is formed. However, by inserting the locking claw pieces 62 protruding from the left and right sides of the casing 1 into the locking hole 73 and the holding hole 77, the casing 1 is held in the mounting frame 71.

To remove the casing 1 from the mounting frame 71, use a jig such as the tip of a screwdriver to press the release piece 76 so as to widen the distance between the right vertical frame 74 and the side frame 75. The engagement with is released. At both upper and lower ends of the mounting frame 71, horizontally elongated mounting holes 78 for mounting on a switch box and screw holes 79 for screwing decorative plates (not shown) are formed. A metal mounting frame 71 is also provided, and the metal mounting frame 71 has a locking claw that can be inserted into a locking hole 63 provided in the casing 1 on the inner edge of the opening. The casing 1 is held by plastically deforming a portion of the mounting frame 71 so that the retaining claws are inserted into the retaining holes 63.

[Effects of the Invention] As described above, the present invention includes a modular block in a casing to which a plug inserted through a plug insertion hole opened on one side of the casing is detachably connected, and the contact between the modular blocks is provided. In a telephone modular jack that has a terminal section that is electrically connected to each pin, the terminal section is a terminal that is connected to a line on one side of the casing opposite to the plug insertion hole, and consists of a pair of lines. It has a plurality of pairs of terminals each connected to a plurality of lines, and the pair of terminals of each line is a modular block pin.

are arranged symmetrically with the plane of symmetry passing through the center of the modular block and perpendicular to the arrangement direction of the contact pins of the modular block,
Each terminal is arranged approximately in the center of one side of the casing to which the line is connected, and the capacitance between the terminals connected to the line of each line can be made approximately equal, and the capacitance that exists between the terminals can be made approximately equal. This makes it possible to prevent signal leakage by reducing the influence of capacitive coupling caused by capacitance.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Figs. 3 and 4 are conceptual diagrams showing the terminal arrangement of the above, and Fig. 5 is used for the same. FIG. 6 is a perspective view showing a telephone modular jack according to the present invention; FIG. 7 is a sectional view of the same; PIIJ8 is a sectional view of a monocular block used in the above; FIG. 9 is a conventional example. FIG. 10 is a conceptual diagram showing the terminal arrangement of another conventional example. 1 is the casing, 2 is the modular block, 3 is the terminal block, 4 is the plug insertion slot, 24 is the contact agent patent attorney Ishi 1) Tsui 71...Casing 2...Mono hoop lock 3...Terminal Block Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 9 Figure 10 Hand IRP, amendment (voluntary) December 27, 1985

Claims (1)

[Claims] (1) A modular block is provided in the casing to which a plug inserted through a plug insertion port opened on one side of the casing is removably connected, and terminal portions are respectively electrically connected to contact pins of the modular block. In the telephone modular jack, the terminal section is a terminal connected to a line on one side of the casing opposite to the plug insertion opening, and includes a plurality of pairs of terminals each connected to a plurality of lines each consisting of a pair of lines, A pair of terminals for each line are arranged symmetrically with respect to a plane that passes through the center of the modular block and is orthogonal to the arrangement direction of the contact pins of the modular block, and each terminal is located at approximately the center of one side of the casing to which the line is connected. A telephone modular jack characterized by being arranged in.