JPH0864291A - Modular jack - Google Patents

Abstract

PURPOSE: To provide a modular jack manufacturing cost of which is low and in which a terminal is fixed firmly in a housing. CONSTITUTION: A plurality of respective projected parts 8, 9, 10 are arranged in a row, respectively, in a case 2. Contact terminals and lead terminals are set between neighboring projected parts 8, 9, 10 while using the projected parts 8, 9, 10 as a guide. Then, the projected parts 8, 9, 10 are crushed mechanically or crushed by heating and melting by a soldering iron, etc., and prescribed parts of the contact terminals and lead terminals are covered with the crushed projected parts 8, 9, 10 in order to firmly fix the terminals in the case 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a modular jack,
Especially used for electronic devices such as telephones, facsimiles,
The present invention relates to a modular jack for connecting the electronic device to a telephone line or the like.

[0002]

2. Description of the Related Art Conventionally, as a modular jack, a groove for a terminal is provided in a housing, and a terminal having a claw portion is press-fitted into this groove so that the claw portion is pressed against an inner wall surface of the groove, and the terminal is provided in the housing. It was known that the structure was fixed to. However, the holding force is weak only with the pressure contact force of the claw portion, and when a mechanical external force is applied to the terminal, the terminal may wobble or come off the groove.

In addition to this, a structure in which the terminal is insert-molded and fixed to the housing is also conceivable. According to this structure, the terminal can be firmly fixed to the housing, but there is a problem that expensive manufacturing equipment is required and the manufacturing cost is increased. Therefore, an object of the present invention is to provide a modular jack which is inexpensive to manufacture and whose terminals are firmly fixed to the housing.

[0004]

In order to solve the above problems, in the modular jack according to the present invention, a terminal is fitted between a plurality of protrusions arranged side by side in the housing, and the protrusions are crushed. It is characterized in that a predetermined portion of the terminal is covered and fixed by the crushed protrusion. As a method of crushing the protrusion, for example, a method of mechanically crushing or a method of melting by heating and crushing is adopted.

With the above structure, the plurality of protrusions can be used as positioning guides when the terminal is attached to the housing. Then, a predetermined portion of the terminal is covered with the crushed protrusion, and is firmly fixed to the housing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the modular jack according to the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the modular jack includes a main body 1, a capacitor array 25, a cover 30, and an earth band 35.

The main body 1 is, as shown in FIGS. 1 to 4,
The case 2, the contact terminal 14, the lead terminal 15, and the filter element 20 are included. The case 2 is integrally molded from a resin material such as PPS resin and has an insertion port 3 into which the mating plug 50 opened on the right side of FIG. 4 is inserted. As shown in FIG. 2, the contact terminal groove 5 is formed on the side wall surface 4a.
And the lead terminal groove 6 are provided so that their ends are close to each other. The grooves 5 and 6 are used for positioning the contact terminal 14 and the lead terminal 15. At the ends of the grooves 5 and 6, a projection 12 having a sharp tip is provided. In the lower portion of the side wall surface 4a, a plurality of rectangular protrusions 10 are arranged in a line in a row so that the lead terminals 15 can be fitted therein. Further, a plurality of rectangular protrusions 8 and 9 are also arranged in a row on both edges of the upper surface 4b of the case 2 at intervals so that the contact terminals 14 can be fitted therein.

The contact terminal 14 and the lead terminal 15 are shown in FIG.
Further, as shown in FIG. 4, it is formed by punching out a conductive hoop material having a spring property such as phosphor bronze. Contact terminal 14
And one end 14a, 1 of each of the lead terminals 15
5a is provided with holes 14c and 15c for inserting the projection 12. After the terminals 14 and 15 are plated, predetermined portions are press-fitted into the grooves 5 and 6 provided on the side wall surface 4a of the case 2. One ends 14a and 15a of the terminals 14 and 15 are arranged close to each other, and the ends 14a and 15
The protrusion 12 is inserted into the holes 14c and 15c provided in a.
The contact terminals 14 are bent along the upper surface 4b of the case 2, and are fitted between the protrusions 9 using the protrusions 9 as guides. Further, the contact terminal 14 is fitted between the protrusions 8 using the protrusions 8 as guides, and then bent along the protrusions 4c so that the other end 14b faces the inside of the insertion opening 3. As a result, the mating plug 50 inserted into the insertion port 3 electrically contacts the contact terminal 14. On the other hand, the other end 15b of the lead terminal 15 is fitted between the protrusions 10 using the protrusions 10 as a guide, and is led out downward from the bottom surface of the case 2. The other end portion 15b functions as a terminal for connecting to an electrode of a circuit board of an electronic device (not shown).

Next, the protrusions 8, 9, 10 are mechanically crushed, or heated and melted with a soldering iron or the like to be crushed. As shown in FIG. 3, the crushed protrusions 8, 9, A predetermined portion of the terminals 14 and 15 is covered with 10 and firmly fixed to the case 2. Similarly, the protrusion 12 is also crushed into a mushroom shape, and the end portions 14a, 1 of the terminals 14, 15 are formed as shown in FIG.
5a is firmly fixed to the case 2. When the holding force of the terminals 14 and 15 having such a fixed structure was measured, it was about 350 g. On the other hand, the terminal holding force of the conventional fixing structure, which is only the pressure contact force by the claw portion, was about 70 g.

The filter element 20 is electrically connected to the ends 14a and 15a of the terminals 14 and 15 by soldering. As the filter element 20, an inductor or the like for removing high frequency noise is used. In the capacitor array 25, a common electrode 26 is formed on the front surface of a dielectric substrate, and individual electrodes (not shown) corresponding to the number of lines are formed on the back surface. The individual electrodes of the capacitor array 25 are electrically connected to the contact terminals 14 on the upper surface 4b of the case 2, and the common electrode 26 is electrically connected to an earth band 35 described later.

The earth band 35 is made of a conductive metal material and is composed of a pair of left and right side pieces 36 and a connecting piece 39. The lower half of the side piece 36 is inserted into the groove portion 7 provided in the side portion of the case 2. Thus, the small protrusion 37 bites into the inner surface of the groove portion 7 and is fixed to the case 2. When the earth band 35 is fixed to the case 2, the connecting piece 39 is pressed against the common electrode 26 of the capacitor array 25. Further, the earth band 35 has a claw portion 38 protruding downward from the groove portion 7 protruding into a hole of a circuit board (not shown) and soldered to an earth line provided on the circuit board. As a result, the common electrode 26 of the capacitor array 25 is connected to the earth line of the electronic device via the earth band 35.

As shown in FIG. 1, the cover 30 is integrally molded from a resin material, is covered on the main body 1, and covers the contact terminals 14, the capacitor array 25 and the filter element 20. The modular jack according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof.

The terminal attached to the case may be a terminal 30 provided with a claw portion 31 at an arbitrary position, as shown in FIG. By press-fitting the terminal 30 into the terminal groove of the case, the claw portion 31 is pressed against the inner surface of the terminal groove, and the terminal 30 is firmly fixed to the case. Further, in the above embodiment, the terminal grooves 5 and 6 are provided on the side wall surface 4a of the case 2, but the grooves 5 and 6 are not necessarily provided. Similarly, the protrusion 1 provided on the side wall surface 4 a of the case 2
2 and the holes 14c and 15c provided in the terminals 14 and 15 and the protrusions 8 and 9 may be omitted depending on the specifications. Further, the terminal may be an integrated type having the functions of these two types of terminals instead of the type in which the contact terminal and the lead terminal are separated as in the above embodiment.

[0014]

As is apparent from the above description, according to the present invention, it is possible to arrange a plurality of protrusions on the housing side by side and use the protrusions as guides to fit the terminals between the protrusions. Positioning of terminals becomes easy. Then, since the predetermined portion of the terminal is covered and fixed with the crushed protrusion, the holding force of the terminal is increased. Moreover, since no expensive manufacturing equipment is required, the modular jack can be manufactured at a lower cost than the terminal fixing structure by insert molding.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a modular jack according to the present invention.

FIG. 2 is a perspective view of the case shown in FIG.

3 is a perspective view showing a state in which a contact terminal and a lead terminal are attached to the case shown in FIG.

FIG. 4 is a cross-sectional view of the modular jack shown in FIG.

5 is a partially enlarged cross-sectional view showing a state in which lead terminals are attached to the case shown in FIG.

FIG. 6 is a plan view showing a modified example of the terminal.

[Explanation of symbols]

 2 ... Cases 8, 9, 10 ... Protrusions 14 ... Contact terminals 15 ... Lead terminals

Claims (1)

[Claims] 1. A terminal is fitted between a plurality of protrusions arranged side by side on a housing, the protrusion is crushed, and a predetermined portion of the terminal is covered with the crushed protrusion to be fixed. Characteristic modular jack.