JP2967222B2 - Modular jack and method of manufacturing the same - Google Patents

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 in telephone line equipment and the like, and more particularly to a modular jack having a built-in noise elimination filter and a method of 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. Conventionally, modular jacks having various structures according to the number of signal lines have been proposed. Further, a modular jack incorporating a filter element such as a coil for removing noise superimposed on a signal line has been proposed.

[0003] Japanese Patent Application Laid-Open No. 2-160389 discloses an example of such a modular jack. That is, as shown in the sectional view of FIG. 2, in the modular jack 1 disclosed in the prior art, a plug insertion opening 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 at one end of the terminal 3 is arranged so as to be electrically connected to a modular plug to be inserted.

[0004] The terminals 3 are arranged in a number corresponding to the number of signal lines in the direction of the paper surface to the back of the drawing. Terminal 3
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 to remove noise from the signal line, and has a structure in which two conductors are co-wound while being insulated from each other. In the case of 4P, that is, 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 built in. On the other hand, as shown in FIG. 3, a structure in which a modular jack 6 and a common mode choke coil 7 are separately mounted on a printed circuit board 8 is also conventionally used.

[0005]

As described above, the number of common mode choke coils 4 and 7 for removing noise is as follows.
When the number of signal lines used increases, it naturally increases. For example, when 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 openings are sized to correspond to the modular plugs.
That is, the dimension between the paper surface and the paper back direction in FIG. 2 must be substantially constant. Therefore, when it is desired to increase the number of common mode choke coils as described above, the depth dimension, that is, the horizontal dimension in FIG. 2 must be increased. As a result, as the number of signal lines increases to six or eight, the depth dimension of the modular jack 1 must be increased, or the common mode choke coil 7 in the structure shown in FIG. I had to add more. Therefore, it has been a major factor that hinders miniaturization of devices in which modular jacks are incorporated.

On the other hand, by using a common mode choke coil in which more conductors insulated from each other are co-wound, it is possible to prevent the modular jack and the occupied space on the substrate from being enlarged as described above. Have also been tried. However, a multilayer wound common mode choke coil formed by winding three or more wires insulated from each other is extremely expensive and requires a contact portion, a coil portion, and a substrate mounting when built into a modular jack. Since it is necessary to divide the conducting wire into three parts, the connection work such as soldering tends to be very complicated. Therefore, there is a problem that not only is the common mode choke coil as a component 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 and inexpensive modular jack capable of coping with an increase in the number of used signal lines and a method of manufacturing the same.

[0009]

SUMMARY OF THE INVENTION A modular jack according to the present invention has a plug insertion slot on one side into which a modular plug is inserted, and a terminal board inserted into a surface opposite to the surface on which the plug insertion opening is opened. Body having a plurality of grooves formed therein, and a plurality of terminal plates press-fitted into and fixed to 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 such that the outer surface of the plate is located on substantially the same plane as the surface of the case body around the groove, and one ends of the plurality of terminal plates are Along the outer surface of the case body from the surface where the groove is formed, and the tip is extended so as to reach the inside of the plug insertion port, on the case body surface where the groove is formed, The terminal board is divided and the divided part 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 the first aspect, wherein a plug insertion opening into which a modular plug is inserted is provided on one surface, and the plug insertion is performed. A step of 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 opening is open; and A terminal plate frame which is configured to have a thickness substantially equal to the depth, and in which a plurality of terminal plates having divided portions formed at a predetermined distance in the middle are integrally formed by a connecting portion, A step of press-fitting and fixing the plurality of grooves of the case book,
A step of cutting a connecting portion of the plurality of terminal boards, and a step of bending one end sides of the plurality of terminal boards so as to be along the outer surface of the case main body and the ends are located in the plug insertion openings. And a step of connecting a chip-type filter element to the divided portions of the plurality of terminal plates.

[0011]

According to the modular jack of the present invention, when the terminal plate is press-fitted, the outer surface of the terminal plate and the surface of the case body around the groove form substantially the same plane, and the thickness of the terminal plate and the groove are adjusted. The depth is chosen. Therefore, in a state where the terminal plate is pressed into the groove, cream solder can be easily applied to the divided portion of the terminal plate, and the chip type filter element is temporarily fixed on the portion where the cream solder is applied,
It can be easily fixed and connected by the reflow method.

In addition, 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, the overall shape is not increased. In addition, 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, 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 for manufacturing a modular jack of the present invention, first, a case main body 11 shown in a perspective view in FIGS. 4 and 5 is prepared. The case main body 11 is formed by molding a synthetic resin, and has a plug insertion opening 12 into which a modular plug is inserted on one surface. As shown in FIG. 4, a large number of grooves 13 are formed on the surface opposite to the surface on which the plug insertion port 12 is formed. 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 to be press-fitted.

On the upper surface of the case body 11, a plurality of rectangular plate-shaped terminal plate guides 14 are provided upright. The plurality of terminal plate guides 14 are arranged at predetermined intervals as shown in the figure, and when extending one end of each terminal plate described later into the plug insertion port 12, to prevent contact between the terminal plates. It is provided in.

Next, a terminal board frame 15 shown in a plan view in FIG. 6 is prepared. The terminal plate frame 15 has a structure in which a plurality of terminal plates 16 are connected by connecting portions 18 and 19 to be integrated. The plurality of terminal plates 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 stamping a metal plate.

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

As shown in FIG. 7, an enlarged projection 20 is formed on the outer peripheral edge of each terminal plate 16. The protrusion 20 is provided in the groove 1 of the case body 11 described above.
The terminal plate 16 is provided for securely fixing the terminal plate 16 in the groove 13 when the terminal plate 16 is press-fitted into the groove 3. On the other hand, as shown in FIG.
The groove 13 of the case main body 11 is also formed with a protrusion 13a projecting into the groove 13, and the protrusion 13 is configured so that the press-fitted terminal plate 16 can be securely fixed.

In assembling the modular jack of this embodiment, a 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 press-fitted into the groove 13 and fixed. Thereafter, the connecting portions 18 and 19 of the terminal plate 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 and lower surfaces 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 as shown in FIG. 1, and further, as shown in a sectional view in FIG. It is bent so as to reach the inside of the plug insertion opening 12.
On the other hand, a portion of the terminal plate 16 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 to 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 the divided portions 16a,
This 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 plates 16 shown in FIG. 6 are used, the optimum chip type filter element 21 for each terminal plate 16 can be easily selected. Can be connected.

Further, as shown in FIG. 6, in this embodiment, since the positions of the divided portions 16a and 16b are mutually shifted between the adjacent terminal plates 16, the terminal plates 1
It is possible to dispose the chip-type filter element 21 (a hatched area indicates a connected position) without increasing the distance between the elements 6 so much. As the chip-type filter element 21, various types of chip-type filter elements such as those in which a through conductor is formed in a magnetic substance on a rectangular plate, a stacked chip-type coil, and a chip-type resistor can be used.

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

Next, a substantially U-shaped ground terminal 23 is placed over the capacitor array 22 from above, 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 that are suspended downward are connected by a top plate portion 23b. The top plate 23b is provided with contact pieces 23c, 23c having a spring property that hang 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, as shown in FIG.
Thus, the modular jack 25 shown in FIG. The lid member 24 has a shape that opens downward as shown in the figure, but has a shape that does not block the plug insertion port 12 on the side surface. In the above embodiment, the chip type filter element 21 is connected after the terminal plates 16 and 16 are press-fitted into the grooves 13 of the case main body 11, but the terminal plate frame 15 shown in FIG. The filter element 21 may be connected to the terminal plate 16, and thereafter, 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, the 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 surface of the case body surrounding the grooves and the outer surface of the terminal plate are flush with each other. And the thickness of the terminal plate are selected. Therefore, even when the terminal plate is pressed into the groove, or even before the terminal plate is pressed into the groove, the chip-type filter element can be extremely easily connected to the divided portion of the terminal plate by a reflow method or the like. .

Further, since the groove is formed in the case body as described above and the terminal plate is press-fitted into the groove, positioning when fixing the terminal plate to the case body is also easy. In addition, when the modular jack is soldered to a printed circuit board or the like, heat is easily transmitted from the terminal plate to the case body side, so that heat resistance is also improved.

Also, since the terminal board has a structure in which a divided portion is provided and a chip type filter element is connected, heat generated when soldering the modular jack to a printed circuit board or the like causes the solder on the side closer to the printed circuit board of the chip type filter element. Even if the solder at the attachment portion is re-melted, the solder on the other side is unlikely to re-melt, so that the chip-type filter element can be prevented from falling off.

Further, since a chip type filter element is connected to each divided portion of a plurality of terminal boards, an optimum chip type filter element can be selected and connected for each signal line, which is more preferable. You can get a modular jack with characteristics. In addition, even when a signal line having a number smaller than the number of the plurality of terminal boards is used, it is only necessary to connect no filter element to the above-mentioned divided portion. Absent. Therefore, the types of products can be reduced,
In addition, the external dimensions of the modular jack can be unified.

Further, since the chip type filter element is incorporated in the modular jack as described above, no space is required for mounting the filter element on a printed circuit board or the like. It is also possible to promote.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view for explaining a manufacturing process of a modular jack according to one 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 a case main body used in the embodiment as viewed from a surface side on which a groove is formed.

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

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

FIG. 7 is an enlarged partial cutaway plan view showing a main part of the terminal plate frame shown in FIG. 6;

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

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

FIG. 10 is a perspective view showing a modular jack of the embodiment.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 11 ... Case main body 12 ... Plug insertion port 13 ... Groove 16 ... Terminal board

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-37581 (JP, A) JP-A-3-130172 (JP, U) JP-A-59-105787 (JP, U) JP-A-4- 91087 (JP, U) JP-A-64-20690 (JP, U) Patent 2975331 (JP, B2) Table 1-501983 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) ) H01R 13/66-13/719 H01R 13/33 H01R 43/00

Claims (2)

(57) [Claims] 1. A plug insertion opening for inserting a modular plug 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 body; and a plurality of terminal plates press-fitted and fixed in a plurality of grooves for inserting a terminal plate of the case body, and an outer surface of the plurality of terminal plates has a case body surface around the groove. The thickness of the terminal plate and the depth of the groove are selected so as to be substantially flush with each other, and one ends of the plurality of terminal plates are outside the case body from the surface where the groove is formed. Along the surface, the tip is extended so as to reach the inside of the plug insertion port, and each terminal plate is divided on the case body surface where 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 for inserting a modular plug on one surface, and a plurality of grooves for terminal board insertion are formed on a surface opposite to a surface on which the plug insertion opening is opened. A step of preparing a case main body, which is configured to have a thickness substantially equal to the groove,
A plurality of terminal plates having divided portions separated by a predetermined distance in the middle thereof, a step of press-fitting and fixing a terminal plate frame formed by being connected and integrated into the plurality of grooves of the case body; A step of cutting a connecting portion of the plurality of terminal boards, and a step of bending one end sides of the plurality of terminal boards so as to be along the outer surface of the case main body and the ends are located in the plug insertion openings. Connecting a chip-type filter element to the divided portions of the plurality of terminal plates.