JPH0693373B2 - Filter connector manufacturing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a filter connector, and more particularly to a method for efficiently manufacturing a filter connector improved so that impedance on the ground side is further reduced. It is a thing.

2. Description of the Related Art Conventionally, there are various types and designs of filter connectors, which have been changed according to the situation in which the filter connector is used.

For example, the filter connector shown in FIG. 7 is attached to an edge portion of a substrate (not shown) in an upright posture as shown. Therefore, the L-shaped angle 1 is attached to both ends of the metal case 2 with the bolts 3 and the nuts 4. Through hole 5 provided in the horizontal portion of L-shaped angle 1
Is used when the filter connector is attached to the substrate.

The metal case described above is configured by combining the separately prepared front shell 6 and back shell 7. That is, the front shell 6 and the back shell 7
And are fixed to each other by the method shown in FIG. 9 or FIG. In FIG. 9, a hole 16 through which the bolt 3 (FIG. 7) passes
In, the front shell 6 and the back shell 7 are fixed by caulking the material of the front shell 6 side. In FIG. 10, for example, the front shell 6
The front shell 6 and the back shell 7 are fixed by bending the claw 17 formed on the side toward the back shell 7 side.

A plurality of pins 8 are arranged inside the metal case 2 as shown in FIG. One end of the pin 8 constitutes a terminal portion 9, and the other end thereof constitutes an electric contact portion 10 with a mating connector (not shown). The filter connector just described uses electrical contacts 10
Is a so-called male type projecting in the front shell 6, and therefore, the front shell 6 has an opening 11 formed therein. The mating connector is a so-called female type, and its electrical contact portion is inserted through the opening 11 of the front shell 6, and the electrical contact portion of the illustrated filter connector is shown.
Contact with 10.

Each pin 8 is held by an insulating front insert 12 and a back insert 13 arranged in the metal case 2. A tubular filter element 14 is arranged in a space between the front insert 12 and the back insert 13 with each pin 8 penetrating therethrough. The filter element 14 is, for example, a cylindrical capacitor, an LC filter, or the like, the electrode on the inner peripheral surface thereof is electrically connected to the pin 8, and the electrode on the outer peripheral surface thereof is the ground plate.
Electrically connected to 15. Soldering is used for these connections. The ground plate 15 is soldered to the back shell 7 so that it is electrically connected and mechanically fixed.

As shown in FIG. 7, the terminal portion 9 of each pin 8 is bent downward. This is because the holes are directly inserted into the holes of the horizontally arranged substrate and are electrically connected. Further, in FIG. 10, the straight terminal portion 9
Is shown.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described conventional example, as shown in FIGS. 9 and 10, the electrical connection between the front shell 6 and the back shell 7 depends only on the mutual contact. Therefore, there is a problem that contact resistance occurs, and particularly when the ground is taken from the front shell 6 side, the impedance increases.

Therefore, an object of the present invention is to provide a method capable of efficiently manufacturing a filter connector capable of extremely reducing the impedance on the ground side.

Means for Solving the Problems The present invention has a plurality of pins, one end of which constitutes a terminal portion and the other end of which constitutes an electrical contact portion with a mating connector, and which is located on the terminal portion side Held through an insulating insert in a case having a conductive surface that is divided into a back shell that penetrates and leads to the outside and a front shell that is located on the electrical contact portion side, and in the case, Further, a plurality of cylindrical filter elements that are held in a state of penetrating the pins are arranged, the electrodes on the inner peripheral surface of the filter element are electrically connected to the pins, and the electrodes are on the outer peripheral surface of the filter element. The present invention is directed to a method of manufacturing a filter connector electrically connected to the back shell so that an electrode of the filter is grounded. In order to do so, the following steps are provided.

(A) A step of preparing a back shell provided with a plurality of through holes for penetrating the plurality of pins, respectively.

(B) A step of preparing, as the front shell, a cover wall that covers both end surfaces of a wall of the back shell in which the through hole is provided, and the cover wall is provided with a cleaning through hole.

(C) A step of accommodating at least a part of each of the filter elements in each of the through holes, and setting the pins held via the insulating insert to penetrate through the filter elements. .

(D) The back shell and the front shell are combined with each other with the insulating insert interposed therebetween, so that a portion of the front shell where the cover wall and the back shell overlap each other is substantially flush with the filter element. A step of being positioned inside and in that state, a space communicating with the cleaning through hole is formed between the back shell and the insulating insert.

(E) After that, between the electrode on the outer peripheral surface of the filter element and the peripheral portion of each through hole, between the pin and the electrode on the inner peripheral surface of the filter element, and the cover wall of the front shell. Between the back shell,
The process of soldering at the same time by solder dipping.

(F) Next, a step of introducing a cleaning liquid into the space through the cleaning through hole.

EFFECTS OF THE INVENTION According to the present invention, in the step (d), the back shell and the front shell are positioned such that the portion where the cover wall of the front shell and the back shell overlap each other are located substantially in the same plane as the filter element. Since the shell and the shell are fitted together, in the step (e), soldering between the pin, the filter element, the back shell and the front shell can be achieved at one time by solder dipping. Therefore, the manufacture of the filter connector can be efficiently advanced. Further, in the above-mentioned solder dip, it is possible to prevent the solder from adhering to unnecessary portions.

Further, in the step (d), when the back shell and the front shell are joined together with the insulating insert interposed therebetween, a space communicating with the cleaning through hole is formed between the back shell and the insulating insert. Therefore, in the step (f), if the cleaning liquid is introduced into the space through the cleaning through hole, the flux and the like can be easily discharged.

Further, in the step (c), since the plurality of pins are integrally positioned by the insulating insert, the work of assembling the filter connector including the work of inserting the plurality of pins into the filter element is facilitated. .

Further, the filter connector obtained by implementing the manufacturing method according to the present invention has the following advantages. First,
Since the filter element is housed in the through hole of the back shell and the electrode on the outer peripheral surface of the filter element is soldered to the back shell, the back shell can have a function as a ground plate. Therefore, the impedance can be made extremely small as compared with the case where a ground plate is separately used. In addition, since the back shell is soldered to the front shell and fixed to each other, a reliable electrical conduction state is obtained between the back shell and the front shell, and when the ground of the filter connector is taken from the front shell side. However, it is possible to prevent the impedance from increasing due to the contact resistance between the front shell and the back shell. Further, since the pins are positioned by the insulating insert and the insulating insert is positioned by sandwiching the front shell and the back shell, the pins cannot be displaced. Further, since the pin is also held by the back shell via the filter element, the back shell also has a function as a conventional back insert (element shown by “13” in FIGS. 7 to 10). Can be made. As described above, when the pins are properly positioned, it is possible to smoothly perform the attachment / detachment operation to / from the mating connector, and to prevent damage to each part of the filter connector due to the positional displacement of the pins. . Further, the number of parts can be reduced by the amount that the ground plate and the back insert are omitted. Further, since the back shell and the front shell are combined to hold the insulating insert, the strength is increased and damage to the filter element due to external stress can be prevented.

Example A filter connector obtained by an example of the present invention
21 is shown in FIGS.

The filter connector 21 having the structure shown in FIG. 1 when completed is composed of the parts shown in FIG.
That is, the metal case 22 is divided into the front shell 23 and the back shell 24. Then, an insulating insert 26 made of a resin or the like, a pin 27 formed by punching out a thin metal plate, and a filter element 28 such as a cylindrical capacitor are inserted into the metal case 22.
The insert 26 is held by the front shell 23 and the back shell 24. Although only one pin 27 and one filter element 28 are shown in FIG. 5, the filter connector 21 to be obtained by this embodiment has 25 pins 27 and filter elements 28, respectively. Prepare

The front shell 23 is integrally formed from a thin metal plate by press molding. A tubular portion 30 is formed on one side of the flange plate 29 forming the relatively wide surface. Tubular part 30
The end face of is an opening 31. On the other side of the flange plate 29, four locking pieces 32 and two cover walls 33 are formed. Each of these cover walls 33 is provided with two cleaning through holes 34. Further, lock holes 35 are provided at both ends of the flange plate 29, respectively.

The insert 26 includes a protrusion 36 that is received in the tubular portion 30 of the front shell 23, and a protrusion 37 that engages with the flange plate 29 at this time. In the projecting portion 37, a notch step portion 37a is formed corresponding to the position of the above-mentioned cleaning through hole 34. Then, a plurality of pin receiving holes 38 are provided so as to be arranged in two rows, penetrating from the projecting portion 37 to the projecting portion 36. These pin receiving holes 38 are open at both ends.

One end of the pin 27 constitutes a terminal portion 39, and the other end thereof constitutes an electrical contact portion 40 with a mating connector. Since the filter connector 21 just described is a so-called female connector, in order to receive the electrical contact portion of the mating male connector, this electrical contact portion 40 is formed into a bifurcated fork shape. It The fork-shaped electrical contact portion 40 is inserted into the pin receiving hole 38 as shown in FIG. In this way, when the pin 27 is inserted into the pin receiving hole 38, the pin 27 does not easily fall off the insert 26.

The filter element 28 may be a cylindrical capacitor as described above or an LC filter. The filter element 28 has a tubular shape such as a cylindrical shape as a whole, and has a flange 41 formed at one end thereof. Electrodes are formed on the inner peripheral surface and the outer peripheral surface of the filter element 28. The terminal portion 39 of the pin 27 described above penetrates through the filter element 28.

The back shell 24 is manufactured by die casting from a metal such as a zinc alloy or an aluminum alloy. Therefore, it is relatively thick. This backshell 24
Both end portions 42 are provided with locking holes 43 corresponding to the locking holes 35 of the front shell 23. This lock hole 43
Are preferably threaded holes. The end portion 42 is further formed with a bracket portion 44 projecting vertically.
The bracket portion 44 is provided with a through hole 45 used when the filter connector 21 is attached to an appropriate substrate. Further, a cutout 46 into which the locking piece 32 of the front shell 23 is fitted is formed in the end portion 42. The notch 46 and the locking piece 32 may not be provided in particular.

Connecting wall to connect both ends 42 of the back shell 24
47 is formed. On both sides of the connecting wall 47, a gap 49 is formed between the bracket portion 44 and the connecting wall 47,
A rising wall 48 is formed extending from the end 42.

A step portion 50 for positioning the cover wall 33 of the front shell 23 is formed on the upper end surface and the lower end surface of the connecting wall 47.

The connecting wall 47 is also provided with a plurality of circular through holes 51 corresponding to the positions of the pin receiving holes 38 described above. The size of these through-holes 51 is chosen so as to be able to receive the aforementioned filter element 28. More preferably,
When the filter element 28 is inserted into the through hole 51, the flange 41 of the filter element 28 comes into contact with the peripheral portion of the through hole 51, and the filter element 28 is positioned.

The front shell 23, the back shell 24, the insert 26, the plurality of pins 27 and the plurality of filter elements described above.
28 is assembled as shown in FIGS.
That is, the front shell 23 and the back shell 24 are prepared, the filter element 28 is housed in each through hole 51 of the back shell 24, and each pin 27 held via the insert 26 is passed through each filter element 28. The front shell 23 and the back shell 24,
The insert 26 is sandwiched and fitted. By this, the fourth
As shown in the figure, the portion where the cover wall 33 of the front shell 23 and the back shell 24 overlap each other is indicated by a broken line.
As shown at 71, it is located substantially in the same plane as the filter element 28. Further, in this state, as also well shown in FIG. 4, a space 53 communicating with the cleaning through hole 34 is formed between the back shell 24 and the insert 26.

Then, soldering is performed to connect the above-mentioned components to each other. After that, the pin 27 prepared in a straight state is bent at a right angle at an appropriate position of the terminal portion 39.

The above-mentioned soldering step will be described mainly with reference to FIG. The soldering process is performed such that one solder dip simultaneously solders all the desired soldering points. In this case, it is preferable to use a container-shaped mask 52 that receives the bracket portion 44, as shown by an imaginary line in FIG. Mask 52
Is arranged so as to enter the gap 49 between the bracket portion 44 and the connecting wall 47 and reach a position above the lower end edge of the cover wall 33 of the front shell 23 in FIG. The mask 52 is used to prevent the through hole 45 of the bracket portion 44 from being filled with solder. Therefore, when the solder dip is performed, the mask connector 52 does not flow into the mask 52. 21 can be submerged in the solder. Therefore,
By keeping the vertical position of the posture shown in FIG. 2 and immersing it in the solder bath so that the solder liquid level reaches the position of the broken line 71 in FIG. 4, the lower end edge of the cover wall 33 is It reaches the solder liquid surface, where soldering of the front shell 23 and the back shell 24 is achieved. Further, of course, the soldering of the electrodes on the inner peripheral surface of the filter element 28 and the pins 27 and the soldering of the electrodes on the outer peripheral surface of the filter element 28 and the back shell 24 are simultaneously achieved.

When the soldering as described above is completed, the flux may remain inside the case 22 and near the filter element 28. In order to clean this, the above-mentioned cleaning through hole 34 is advantageously used. As described above with reference to FIG. 4, the cleaning through hole 34 communicates with the space 53 between the back shell 24 and the insert 26 through the notch step portion 37a. If a cleaning solution such as trichlorethylene is made to flow through 34, the flux can be easily discharged.

In the filter connector 21 obtained as described above, it is preferable that each filter element 28 has an end surface facing the outside substantially flush with the outer surface of the connecting wall 47 of the back shell 24. Because if the filter element 28
The end face facing the outside of is located deeper than the outer surface of the connecting wall 47,
This is because when the recess is formed, the solder may be buried in the recess during the solder dip, and the pin 27 and the back shell 24 may be short-circuited. On the other hand, when the end surface of the filter element 28 facing the outside is located so as to project from the outer surface of the connecting wall 47, when the pin 27 is bent by the force applied from the outside to the pin 27, the filter element 28 is damaged. This is because there is a risk of

FIG. 6 is a perspective view showing the positional relationship when the filter connector 21 described above is connected to the mating connector 54.

Since the filter connector 21 is a female type as described above, the mating connector 54 is configured as a male type. The mating connector 54 includes a tubular portion 55 that receives the tubular portion 30 of the filter connector 21 therein, and inside the tubular portion 55, an electrical contact portion 56 of the pin is provided so as to project. The electrical contact portion 56 enters the pin receiving hole 38 through the opening 31 shown in FIG. 2, and is a fork-shaped electrical contact portion.
Sandwiched between 40. The pin having such an electrical contact portion 56 is held by an insulating insert 57.

Further, ends 58 are formed on both sides of the mating connector 54 in a symmetrical positional relationship with the filter connector 21. A locking hole 60 is formed in the end portion 58.

Although the locking hole 43 on the filter connector 21 side is a screw hole described above, the locking hole 60 on the mating connector 54 side may be a normal hole.

As described above, the lock screw 62 is used to fix the state in which the tubular portion 55 of the mating connector 54 is covered on the tubular portion 30 of the filter connector 21 and the electrical connection is achieved. The lock screw 62 includes, for example, a hexagonal head portion 63 and a male threaded shaft portion 64, and a female screw portion 65 is further formed at the tip end portion of the head portion 63. First, the shaft portion 64 of the lock screw 62 is screwed into the lock hole 43, which is the screw hole described above. Then, when the mating connector 54 is mated, the female screw portion 65 and the locking hole 60 are aligned with each other, and the set screw 66 is inserted there and screwed into the female screw portion 65. In this way, the two connectors 21 and
54 are mechanically fixed to each other.

Instead of using the specially shaped lock screw 62 as described above, a normal screw is used and the set screw 66 is used.
The position may be passed through the locking hole 60 and then screwed into the locking hole 43 for substitution.

FIG. 6 shows a male connector 54 as the mating connector 54. This male connector 54 can also be realized with a configuration substantially similar to that of the female filter connector 21.
That is, the present invention can be applied to the manufacture of the female filter connector and the manufacture of the male filter connector only by changing the shapes of the electrical contact portions of the pins and the inserts. The connector 54 shown in FIG. 6 is also an example thereof, and the appearance of "67" in the appearance is the front shell, and the appearance of "68" is the back shell. Front shell 67 and back shell
The state of combination with 68 and the positional relationship of the filter element and the pin with respect to the back shell 68 are substantially the same as those of the filter connector 21. Further, the connector 54 also has a through hole 69 for cleaning formed therein.

As described above, one embodiment of the present invention has been described with reference to the drawings, but still another embodiment is possible although not shown.

For example, the back shell 24 is made of plastic,
You may use the thing which gave the metal plating to the surface.

Further, the back shell 24 may be formed by cutting metal.

Further, the terminal portion 39 of the pin 27 may be linearly extended, or the bracket portion 44 may not be formed.

[Brief description of drawings]

FIG. 1 is a perspective view of a filter connector 21 obtained according to an embodiment of the present invention. FIG. 2 is a plan view of the filter connector of FIG. 1, with a part cut away to show a cross section. FIG. 3 is a side view of the filter connector 21 of FIG. FIG. 4 shows the filter connector 21 of FIG.
3 is a cross-sectional view of the cleaning through hole 34 and one pin 27. FIG. FIG. 5 is an exploded perspective view showing the parts constituting the filter connector 21 of FIG. FIG. 6 is a perspective view showing a positional relationship for achieving the connection between the filter connector 21 of FIG. 1 and the mating connector 54. FIG. 7 is a perspective view showing a conventional filter connector. FIG. 8 shows the filter connector of FIG. 7 in a section through the pin 8. 9 and 10 respectively show a conventional method for fixing the front shell 6 and the back shell 7 to each other. In the figure, 21 is a filter connector, 22 is a metal case, 23 is a front shell, 24 is a back shell, 26 is an insert, 27 is a pin, 28 is a filter element, 33 is a cover wall, 34 is a cleaning through hole, 39 Is a terminal portion, 40 is an electrical contact portion, 51 is a through hole, 54 is a mating connector, and 71 is a plane located at a portion where the cover wall and the back shell overlap each other.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 60-46675 (JP, U) Shown 56-37281 (JP, U) Shown 48-38398 (JP, U) Shown 59- 47985 (JP, U)

Claims (1)

[Claims] 1. A plurality of pins, one end of which constitutes a terminal portion and the other end of which constitutes an electrical contact portion with a mating connector, are located on the terminal portion side and extend through the terminal portion to the outside. Is held via an insulating insert in a case having a conductive surface divided into a back shell and a front shell located on the side of the electrical contact portion, and the pin is further penetrated into the case. A plurality of cylindrical filter elements that are held in a held state are arranged, the electrodes on the inner peripheral surface of the filter element are electrically connected to the pins, and the electrodes on the outer peripheral surface of the filter element are grounded. Electrically connected to the back shell so that, in the method of manufacturing the filter connector, as the back shell, a plurality of pins that respectively penetrate the plurality of pins. A step of preparing a through-hole provided with a through-hole, and a cover wall for covering both end surfaces of a wall of the back shell provided with the through-hole is formed as the front shell, and the through-hole for cleaning is formed in the cover wall. And a step of preparing at least a part of each of the filter elements in each of the through holes, and each of the pins held via the insulating insert to each of the filter elements. And a step of bringing the back shell and the front shell together, sandwiching the insulating insert, thereby, a portion where the cover wall of the front shell and the back shell overlap each other, The filter element is located substantially in the same plane as the filter element, and in that state, a space communicating with the cleaning through hole is And the inner periphery of the filter element, between the electrode on the outer peripheral surface of the filter element and the peripheral portion of each of the through holes, and then between the outer shell and the insulating insert. A step of simultaneously soldering between the electrodes on the surface and between the cover wall of the front shell and the back shell by a solder dip, and then introducing a cleaning liquid into the space through the cleaning through hole. A method of manufacturing a filter connector, comprising: