JPH0660942A - Modular jack and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a compact modular jack, which can correspond to the increase of signal lines to be used, at a low cost. CONSTITUTION:One surface of a case main body 11 is formed with a plug insertion hole 12, and the surface of the case main body 11, which is opposite to the surface formed with a plug insertion hole, is formed with plural grooves for the insertion of terminal plates, and terminal plates 16 are pressed into these grooves. The outer surfaces of plural terminal plates 16 are positioned on the nearly same flat surface with the case main body surface of the periphery of the grooves, and each one end of the plural terminal plates 16 is bent along the outer surface of the case main body 11 so that the tip thereof is positioned inside of the plug insertion hole 12. Furthermore, each terminal plate is formed with divided parts on the outer surface of the case main body formed with the grooves, and a chip type filter element is connected to each divided part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modular jack used for telephone line equipment and the like and a method for manufacturing the same, and more particularly to a modular jack having a noise elimination filter built therein and a method for manufacturing the same.

[0002]

2. Description of the Related Art In equipment used for telephone lines, modular jacks and modular plugs are frequently used as parts for connecting signal lines. Various types of modular jacks have been conventionally proposed according to the number of signal lines. Further, a modular jack in which a filter element such as a coil is incorporated in order to remove noise superimposed on a signal line is also proposed.

Japanese Unexamined Patent Publication No. 2-160389 discloses an example of the modular jack as described above. That is, as shown in the sectional view of FIG. 2, in the modular jack 1 disclosed in this prior art, a plug insertion port 2 into which a modular plug is inserted is provided on one surface of a case body 2.
a is opened, and the terminal 3 is arranged in the plug insertion opening 2a. A portion 3a on one end side of the terminal 3 is arranged so as to be electrically connected to a modular plug to be inserted.

It should be noted that the terminals 3 are arranged in parallel in the direction from the paper surface to the paper spine in the drawing according to the number of signal lines. Terminal 3
The other end of is connected to the common mode choke coil 4, and the other end of the common mode choke coil 4 is connected to the lead terminal 5. The common mode choke coil 4 is inserted in order to remove noise from the signal line, and has a structure in which two conducting wires are wound together while being insulated from each other. In the case of 4P, that is, in the case of a modular jack having four signal lines, since there are four signal lines, naturally four terminals 3 are provided,
Therefore, the two common mode choke coils 4 are incorporated. On the other hand, as shown in FIG. 3, a structure in which the modular jack 6 and the common mode choke coil 7 are separately mounted on the printed circuit board 8 has been conventionally used.

[0005]

As described above, the number of common mode choke coils 4 and 7 for removing noise is
As the number of signal lines used increases, it naturally increases. For example, if there are eight signal lines, four common mode choke coils 4 and 7 must be arranged.

On the other hand, in the modular jacks 1 and 6, the plug insertion port is sized to correspond to the modular plug, and therefore the width of the modular jacks 1 and 6 is
That is, the dimension in the plane of FIG. Therefore, in order to increase the number of common mode choke coils as described above, it is necessary to increase the depth dimension, that is, the dimension in the lateral direction of FIG. As a result, the depth dimension must be increased in the modular jack 1 as the number of signal lines increases to 6 or 8, or in the structure shown in FIG. 3, the common mode choke coil 7 is laterally arranged in the drawing. I had to add more. Therefore, it has been a major factor that hinders the miniaturization of the device in which the modular jack is incorporated.

On the other hand, by using a common mode choke coil formed by winding together more insulated wires which are insulated from each other, it is possible to prevent the above-mentioned modular jack from increasing in size and occupying a larger space on a board. Has also been tried. However, a multilayer winding type common mode choke coil formed by winding three or more conducting wires in an insulated state from each other is very expensive and, when built in a modular jack, has a contact portion, a coil portion, and a substrate mounting portion. Since it is necessary to divide the conducting wire into three parts, the connecting work such as soldering tends to be very complicated. Therefore, there is a problem that not only the common mode choke coil as a component is expensive, but also the cost is significantly increased due to the complexity of the connection work.

An object of the present invention is to provide a small-sized and inexpensive modular jack capable of coping with an increase in the number of signal lines used and a manufacturing method thereof.

[0009]

A modular jack according to the present invention has a plug insertion opening into which a modular plug is inserted, and a terminal board is inserted into the surface opposite to the opening of the plug insertion opening. A plurality of terminals, the case body having a plurality of grooves formed therein, and a plurality of terminal plates press-fitted and fixed in the plurality of grooves for inserting a terminal plate of the case body, the plurality of terminals being provided. The thickness of the terminal plate and the depth of the groove are selected so that the outer surface of the plate is located substantially flush with the surface of the case body around the groove, and one end side of the plurality of terminal plates is On the surface of the case main body where the groove is formed, each of which extends from the surface where the groove is formed along the outer surface of the case main body so that the tip reaches the inside of the plug insertion opening. The terminal board is divided and the divided parts And it is characterized in that it is connected chip type filter elements on.

A method for manufacturing a modular jack according to the present invention relates to a method for manufacturing a modular jack according to claim 1, which has a plug insertion port into which a modular plug is inserted and which has the plug insertion opening. Preparing a case body in which a plurality of grooves for terminal plate insertion are formed on the surface opposite to the surface on which the mouth is opened; and a step of forming the case body so that the groove is inserted into the plurality of grooves. A terminal plate frame, which is configured to have a thickness substantially equal to the depth, and in which a plurality of terminal plates each having a split portion formed at a predetermined distance in the middle are integrally configured by a connecting portion, A step of press-fitting and fixing into the plurality of grooves of the case book;
A step of cutting the connecting portion of the plurality of terminal plates, and a step of bending one end side of the plurality of terminal plates so as to be along the outer surface of the case body and the tip thereof is located in the plug insertion opening. And a step of connecting a chip-type filter element to the divided portions of the plurality of terminal plates.

[0011]

In the modular jack of the present invention, the thickness of the terminal plate and the groove are adjusted so that the outer surface of the terminal plate and the surface of the case body around the groove form substantially the same plane when the terminal plate is press-fitted. Depth is chosen. Therefore, in the state where the terminal plate is press-fitted into the groove, cream solder can be easily applied to the above-mentioned divided parts of the terminal plate, and the chip-type filter element is temporarily fixed on the part to which the cream solder is applied,
It can be easily fixed and connected by the reflow method.

Further, since the chip type filter element is connected to the divided portion of each terminal plate on the surface where the groove into which the terminal plate is press-fitted is formed, there is no need to increase the overall size of the chip type filter element. Moreover, an optimum filter element can be connected to each signal line. Therefore, it is possible to cope with an increase in the number of signal lines without increasing the size of the entire modular jack and particularly without increasing the depth dimension.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be clarified by describing embodiments of the present invention with reference to the drawings. In the method of manufacturing the modular jack of the present invention, first, the case body 11 shown in the perspective views of FIGS. 4 and 5 is prepared. The case body 11 is formed by molding a synthetic resin, and has a plug insertion port 12 into which a modular plug is inserted on one side. A large number of grooves 13 are formed on the surface opposite to the surface on which the plug insertion opening 12 is formed, as shown in FIG. The groove 13 corresponds to a portion into which a terminal plate described later is press-fitted, and is configured to have a depth equivalent to the thickness of the terminal plate press-fitted.

A plurality of rectangular plate-shaped terminal plate guides 14 are erected on the upper surface of the case body 11. The plurality of terminal board guides 14 are arranged at predetermined intervals as shown in the drawing, and in order to prevent contact between the terminal boards when extending one end side of each terminal board to be described later into the plug insertion opening 12. It is provided in.

Next, a terminal board frame 15 shown in a plan view in FIG. 6 is prepared. The terminal board frame 15 has a structure in which a plurality of terminal boards 16 are connected by connecting portions 18 and 19, and are integrated. The plurality of terminal plates 16 and 16 are configured to have a thickness substantially equal to the depth of the plurality of grooves 13 of the case body 11 described above. The terminal plate frame 15 can be formed by punching out a metal plate.

The plurality of terminal boards 16 and 16 are
It is divided with the gap region 19 in between, and a chip-type filter element described later is connected between the divided portions 16 a and 16 b separated by the gap region 19. As described above, each of the plurality of terminal boards 16 has the divided portions 16a and 16b that face each other with the gap region 19 interposed therebetween. However, as shown in FIG.
Since they are connected by 8 and 19, the shape shown in FIG. 6 is maintained. That is, the divided portion 16a side is connected and integrated by the connecting portion 18, and the divided portion 16b side is connected to the connecting portion 1.
9 are connected and integrated.

Further, as shown in an enlarged manner in FIG. 7, the outer peripheral edge of each terminal plate 16 is formed with a protrusion 20 protruding outward. The protrusion 20 is the groove 1 of the case body 11 described above.
It is provided to securely fix the terminal plate 16 in the groove 13 when the terminal plate 16 is press-fitted into the groove 13. On the other hand, as shown in FIG.
The groove 13 of the case body 11 is also formed with a protrusion 13a that protrudes into the groove 13, and the protrusion 13 is configured to securely fix the press-fitted terminal plate 16.

In assembling the modular jack of this embodiment, the terminal plate frame 15 shown in FIG. 6 is brought into contact with the surface of the case body 11 on which the groove 13 is formed,
The terminal plate 16 is pressed into the groove 13 and fixed. Then, the connecting portions 18 and 19 of the terminal board frame 15 are removed by cutting.

Next, a portion of the terminal plate 16 extending vertically from the surface on which the groove 13 is formed is bent along the upper surface and the lower surface of the case body 11. in this case,
The terminal plate 16 bent along the upper surface 11a of the case body 11 is extended between the terminal plate guides 14 and 14 as shown in FIG. 1, and further, as shown in a sectional view of FIG. It is bent so as to reach the inside of the plug insertion port 12.
On the other hand, a portion of the terminal plate 16 that is bent from the surface on which the groove 13 is formed to the lower surface side of the case body 11 is used as a terminal for connection with the outside.

Next, as shown in FIG. 9, the chip type filter element 21 is connected between the divided portions 16a and 16b of the terminal plate 16. This connection is made by dividing the terminal board 16 into the divided portions 16a,
It can be performed by applying cream solder to 16b, temporarily fixing the chip type filter element 21 and then soldering by a method such as reflow. Therefore, even when the number of signal lines is increased, that is, when all the terminal boards 16 shown in FIG. 6 are used, it is easy to select the optimum chip type filter element 21 for each terminal board 16. Can be connected.

Further, as shown in FIG. 6, in this embodiment, the positions of the divided portions 16a and 16b are displaced from each other between the adjacent terminal plates 16, so that the terminal plate 1
It is possible to dispose the chip-type filter element 21 (hatched portions are shown to indicate the positions to be connected) without increasing the distance between the elements 6 so much. As the chip-type filter element 21, various chip-type filter elements such as a rectangular plate in which a penetrating conductor is formed in a magnetic body, a laminated chip-type coil, or a chip-type resistor can be used.

Next, as shown in FIG. 1, the capacitor array 22 is arranged above the case body 11. The capacitor array 22 includes a ground electrode 22 on the entire upper surface of the dielectric plate.
It has a structure in which a is formed and a plurality of grooves 22b are formed on the lower surface. An electrode is formed on the surface 22c between the plurality of grooves 22b, and the electrode is configured to be electrically connected to the terminal plate 16 extending to the upper surface 11a of the case body 11. The groove 22b is provided to ensure insulation between the electrodes on the surface 22c.
Need not necessarily be provided.

Next, the capacitor array 22 is arranged and covered with a ground terminal 23 having a substantially U-shape, and the capacitor array 22 is fixed to the case body 11. Ground terminal 23
Is connected to the ground potential, and has a structure in which a pair of terminal portions 23a, 23a hanging downward are connected by a top plate portion 23b. The top plate portion 23b is provided with contact pieces 23c, 23c having a spring property and hanging downward. The contact pieces 23c, 23c are provided for ensuring electrical contact with the ground electrode 22a and for securely fixing the capacitor array 22 to the upper surface 11a of the case body 11.

Next, by covering with a lid member 24, as shown in FIG.
The modular jack 25 of this embodiment shown in FIG. As shown in the figure, the lid member 24 has a shape that opens downward, but the side surface portion is configured so as not to close the plug insertion port 12. In the above embodiment, the chip-type filter element 21 was connected after the terminal plates 16 and 16 were press-fitted into the groove 13 of the case body 11, but in the state of the terminal plate frame 15 shown in FIG. The filter element 21 may be connected to the terminal plate 16, and then the terminal plate 16 may be inserted into the groove 13 of the case body 11 and the connecting portions 18 and 19 of the terminal plate frame 15 may be removed by cutting.

[0025]

According to the present invention, a plurality of terminal plates are press-fitted into the grooves of the case body, and the depth of the grooves is set so that the case body surface around the grooves and the outer surface of the terminal plate are flush with each other. And the thickness of the terminal board is selected. Therefore, even when the terminal plate is press-fitted in the groove, or even before the terminal plate is press-fitted in the groove, the chip-type filter element can be extremely easily connected to the divided portion of the terminal plate by the reflow method or the like. .

Moreover, the groove is formed in the case body as described above, and the terminal plate is press-fitted into the groove, so that positioning when fixing the terminal plate to the case body is easy. Not only that, when the modular jack is soldered to a printed circuit board or the like, heat is easily transferred from the terminal plate to the case body side, so that heat resistance is also improved.

Further, since the terminal plate has the structure in which the chip-type filter element is connected by providing the divided portion, the solder on the side close to the printed circuit board of the chip-type filter element due to the heat when the modular jack is soldered to the printed circuit board or the like. Even if the solder in the attachment portion is remelted, the solder on the other side is unlikely to be remelted, so that the chip-type filter element can be prevented from falling off.

Further, since the chip type filter element is connected to each divided portion of the plurality of terminal boards, the optimum chip type filter element can be selected and connected for each signal line, which is more preferable. You can get the characteristic modular jack. Further, even when using a signal line smaller than the number of a plurality of terminal boards, it suffices not to connect a filter element to the above-mentioned divided portion, and therefore it is necessary to change the size of the product depending on the number of used signal lines. Absent. Therefore, the number of products can be reduced,
Moreover, the outer dimensions of the modular jack can be unified.

Furthermore, since the chip-type filter element is built in the modular jack as described above, there is no need for a space for mounting the filter element on a printed circuit board or the like, so that the device in which the modular jack is incorporated can be downsized. It is possible to promote it.

[Brief description of drawings]

FIG. 1 is an exploded perspective view for explaining a manufacturing process of a modular jack according to an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of a conventional modular jack.

FIG. 3 is a side view for explaining another example of the conventional modular jack.

FIG. 4 is a perspective view of the case main body used in the embodiment as seen from the surface side where the groove is formed.

FIG. 5 is a perspective view of the case body used in the embodiment as seen from the plug insertion opening side.

FIG. 6 is a plan view showing a terminal board frame used in the embodiment.

7 is a partially cutaway plan view showing an enlarged main part of the terminal board frame shown in FIG.

FIG. 8 is a front view for explaining the shape of the groove of the case body.

FIG. 9 is a sectional view for explaining a state in which the terminal plate and the filter element are fixed to the case body.

FIG. 10 is a perspective view showing a modular jack according to an embodiment.

[Simple explanation of symbols]

 11 ... Case main body 12 ... Plug insertion port 13 ... Groove 16 ... Terminal plate

Claims (2)

[Claims] 1. A plug insertion opening into which a modular plug is inserted is provided on one surface, and a plurality of grooves for inserting a terminal board are formed on a surface opposite to a surface on which the plug insertion opening is opened. A case main body, and a plurality of terminal plates press-fitted and fixed in a plurality of grooves for inserting the terminal plate of the case main body, and an outer surface of the plurality of terminal plates is a surface of the case main body around the groove. The thickness of the terminal plate and the depth of the groove are selected so as to be substantially on the same plane as the above, and one end of the plurality of terminal plates is located outside the case body from the surface where the groove is formed. Each terminal plate is divided along the surface of the case main body in which the tip extends into the plug insertion opening and the groove is formed, and between the divided portions. The module to which the chip-type filter element is connected Over Jack. 2. A plug insertion opening into which a modular plug is inserted is provided on one surface, and a plurality of grooves for inserting a terminal board are formed on a surface opposite to a surface where the plug insertion opening is opened. And a step of preparing a case body, which has a thickness substantially equal to that of the groove,
And a step of fixing a plurality of terminal plates each having a divided portion separated by a predetermined distance in the middle of the terminal plate frame, which is connected and integrated, into the plurality of grooves of the case main body, Cutting the connecting portions of the plurality of terminal boards, and bending one end side of the plurality of terminal boards so that the tip is located in the plug insertion opening along the outer surface of the case body. And a step of connecting a chip-type filter element to the divided portions of the plurality of terminal boards, the method of manufacturing a modular jack.