JPH0765903A - Filter connector - Google Patents

Abstract

PURPOSE:To provide a filter connector which excels in the effectiveness in assembling and can prevent poor continuity in the soldered part of the filter element resulting from thermal expansion and contraction of component parts. CONSTITUTION:A plurality of connector pins 5 are installed on a body case 1 at a certain pitch, and a through capacitor 10 is fitted on each connector pin 5. Each connector pin 5 has a terminal part 6 and contact part 7, and a narrow head part 8 and flanges 9 protruding to both sides are provided right above the contact part 7. Together with this part 7, the head part 8 and flanges 9 are pressure fitted and accommodated in a through hole 2 provided at the body case 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter connector, and more particularly to a filter connector having a plurality of signal transmission connector pins and having a filter element such as a capacitor built therein.

[0002]

2. Description of the Related Art Generally, a connector which is attached to a printed circuit board inside a device and to which a plug connector attached to the tip of a cable derived from another device is connected, is inserted through a connector pin for signal transmission. Various types of filters are known that have a built-in filter element (mainly a feedthrough capacitor) for removing noise. This is because the filter element is built in the connector, so that the effective use space of the printed circuit board can be widened.

Conventionally, in this type of filter connector, the contact portion of the connector pin is press-fitted and housed in the through hole of the main body case, the feedthrough capacitor is fitted to the root of the terminal portion protruding to the outside, and the main body case is further attached. It is covered with a shield case. The inner peripheral electrode of the feedthrough capacitor is soldered to the terminal portion, and the outer peripheral electrode is soldered to the shield case.

By the way, since the main body case is made of resin and the shield case is made of metal, the coefficient of thermal expansion differs greatly, and when these parts repeatedly expand and contract due to temperature changes, the connector pins are distorted. However, there is a problem that conduction failure occurs in the soldering portion of the feedthrough capacitor. In order to solve this, as described in JP-A-3-134979 and JP-A-3-134980, the middle portion of the connector pin is bent into a crank shape or a curved shape, and the connector pin is distorted at these bent portions. Has been proposed to prevent the conduction failure.

However, bending the connector pin at the intermediate portion not only makes it difficult to position the connector pin when press-fitting it into the main body case, but also deforms the bent portion during press-fitting, or requires a small force even after press-fitting. It has a problem that it is easily deformed.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a filter connector which is excellent in assemblability and which can prevent defective conduction of a soldered portion due to thermal expansion and contraction of parts. is there. In order to achieve the above object, the filter connector according to the present invention includes a main body case,
It is composed of a connector pin having a terminal portion and a contact portion, a straight cylindrical filter element having electrodes on inner and outer peripheral surfaces, and a shield case covering at least the upper surface of the main body case. The connector pin has a narrow neck portion having a narrow width immediately above the contact portion, and a collar portion protruding on both sides.

A plurality of through holes are formed in the main body case at a predetermined pitch, and the contact portions of the connector pins are press-fitted and housed in the through holes. At this time, the neck portion is also housed in the through hole, preferably up to the collar portion. The terminal portions of the connector pins project from the upper surface of the main body case at a predetermined pitch. The filter element is fitted to the root of the terminal portion of the connector pin, and is inserted into a plurality of holes formed at a predetermined pitch in the shield case that covers the body case. The outer peripheral electrode of the filter element is soldered to the shield case, and the inner peripheral electrode is soldered to the terminal portion of the connector pin.

In the present invention described above, a neck having a narrow width is formed between the contact portion and the terminal portion of the connector pin, and the neck portion applies a strain force applied to the connector due to a difference in coefficient of thermal expansion between the main body case and the shield case. It will be absorbed. Therefore, it is possible to prevent the soldered portion of the filter element from being peeled off and causing a conduction failure. Further, since the neck portion is straight and is not bent or curved like a crank, there is no fear of deformation when press-fitted into the through hole of the main body case, and the assembly can be smoothly performed. Moreover, since the neck portion is stored in the through hole, the neck portion is not easily bent after the storage, and the pitch of the terminal portion is accurately maintained,
The filter element can be easily attached.

Further, the collar portion provided on the connector pin functions as a locking portion of the press-fitting jig when the contact portion is press-fitted into the through hole of the main body case.

[0010]

Embodiments of the filter connector according to the present invention will be described below with reference to the accompanying drawings. 1 and 2
In the above, the filter connector comprises a body case 1 and connector pins 5 arranged in three rows of five at a predetermined pitch.
And a feedthrough capacitor 10 attached to each connector pin 5.
And a supporter 15 for temporarily fixing the feedthrough capacitor 10, a front shield case 20, and a rear shield case 25.

The body case 1 is integrally molded from a resin material, and a plurality of through holes 2 penetrating vertically are formed in correspondence with the pitch of the connector pins 5. The connector pin 5 has a bar-shaped terminal portion 6 and a wide contact portion 7,
Directly above the contact portion 7, a narrow neck portion 8 having a narrow width and a collar portion 9 projecting to both sides are formed. The contact portion 7 is bifurcated, and a mating plug (not shown) is inserted therein.

The connector pin 5 is attached to the main body case 1 by press-fitting and housing the contact portion 7 into the through hole 2 from above. The press-fitting is performed by gripping the upper portion of the collar portion 9 with a comb-shaped jig (not shown) and pressing the collar portion 9 with the jig, and the upper end of the collar portion 9 of the contact portion 7 is the upper surface of the main body case 1. It is pressed in until it matches. Both shoulders of the contact portion 7 are pressed against the inner wall portion of the through hole 2 and are accommodated and fixed in a state of being regulated in the thickness direction by the ribs 3 formed on the inner wall portion of the through hole 2. FIG. 5 shows a state in which the connector pin 5 is attached to the main body case 1.

The feedthrough capacitor 10 includes electrodes 11, 1 on the outer and inner peripheral surfaces of a straight cylindrical dielectric molded product.
2, the outer peripheral electrode 11 is soldered to the rear shield case 25, and the inner peripheral electrode 12 is fitted to the base portion of the terminal portion 6 of the connector pin 5 as described below.
Are soldered to the terminal portion 6.

The supporter 15 is the feedthrough capacitor 10 described above.
Is a plate made of resin having a thickness of about half the length of
As shown in FIGS. 3 and 4, a plurality of holes 16 are formed at the same pitch as the connector pins 5. These holes 16 are slightly larger than the outer diameter of the feedthrough capacitor 10, and four small protrusions 17 are formed in the inner wall portion in the axial direction of the holes 16.
The supporter 15 holds the feedthrough capacitor 10 by press-fitting it into the hole 16 during assembly. At this time, the feedthrough capacitor 10 is held in a state where the outer peripheral surface thereof is in pressure contact with the small protrusion 17.

The feedthrough capacitor 10 held by the supporter 15 has a connector pin 5 attached to the body case 1.
It is fitted to the terminal portion 6 of (see FIG. 6). At this time, the supporter 15 is in contact with the upper surface of the main body case 1, and the feedthrough capacitor 10 has one end in contact with the upper surface of the main body case 1 and is in a state of being set at the root portion of the terminal portion 6.

The front shield case 20 covers the side surface of the main body case 1, and the rear shield case 25 covers the upper surface of the main body case 1. The front shield case 20 is joined to the main case 1 by caulking them. Also,
A pair of projecting pieces 26 are pulled out from the rear shield case 25, and the projecting pieces 26 function as a mounting portion of the filter connector to the printed circuit board. Further, the rear shield case 25 has a plurality of holes 27 formed at the same pitch as the connector pins 5. These holes 27 are through capacitors 10.
Slightly larger than the outer diameter of. By attaching the rear shield case 25 to the main body case 1, the supporter 15 is sandwiched and held between the upper surface of the main body case 1 and the rear shield case 25, and each feedthrough capacitor 10 is positioned. Further, the upper half of the feedthrough capacitor 10 is inserted into the hole 27 of the rear shield case 25.

The filter connector assembled as described above is turned upside down from the state shown in FIG. 1, and the line L is immersed in the solder liquid. That is, the dip solder is applied, and the outer peripheral electrode 11 of the feedthrough capacitor 10 is connected to the rear shield case 25.
The inner peripheral electrode 12 is electrically connected to the terminal portion 6 of the connector pin 5.

The terminal portion 6 of each connector pin 5 is bent by 90 °, as shown by the alternate long and short dash line in FIG. 1, and is located between the pair of protrusions 26. If necessary, a retainer 30 is attached to the bent portion of the terminal portion 6 to complete a filter connector.

In the above embodiments, the neck portion 8 having a narrow width is formed immediately above the contact portion 7 of the connector pin. In this filter connector, the main body case 1 and the shield cases 20 and 25 repeatedly expand and contract due to the ambient temperature change, the connector pin 5 is distorted due to the difference in the thermal expansion coefficient between the two, and the soldered portion of the feedthrough capacitor 10 is soldered. There is a risk of poor continuity. However, in this embodiment, the strain generated in the connector pin 5 is absorbed by the deformation of the neck portion 8,
Problems such as poor continuity do not occur. Moreover,
Since the neck portion 8 has a straight shape, the connector pin 5
When press-fitting into the through hole 2 of the main body case 1, the neck portion 8 can be smoothly press-fitted without bending. Furthermore, since the neck portion 8 is housed in the through hole 2, there is no risk of the neck portion 8 bending after the connector pin 5 is attached to the main body case 1, and the pitch of the terminal portions 6 is accurately maintained. Therefore,
The work of fitting the feedthrough capacitor 10 to the terminal portion 6 is easy.

Further, in the above embodiment, the feedthrough capacitor 10 is press-fitted and held in the hole 16 of the supporter 15, and the supporter 15 is sandwiched between the main body case 1 and the rear shield case 25. At this time, even if the filter connector is inverted, the feedthrough capacitor 10 does not drop or the position is not displaced. Moreover, supporter 1
By forming the small projection 17 in the hole 16 of No. 5, the through capacitor 10 crushes the top of the small projection 17 to form the hole 1.
It is press-fitted in 6 to prevent excessive stress from being generated in the feedthrough capacitor 10. Further, since the feedthrough capacitor 10 has a straight shape, it can be easily molded, has good dimensional accuracy, and can be set at a narrow pitch.

The filter connector according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist thereof. In particular, as the filter element, in addition to the feedthrough capacitor 10, an inductor or other noise removing filter can be used. In addition, in the assembling process, in addition to fitting the feedthrough capacitor 10 to the supporter 15 to the terminal portion 6, after fitting each feedthrough capacitor 10 to the root portion of the terminal portion 6, the supporter 15 is attached from above. The feedthrough capacitors 10 may be pressed and fitted into the holes 16.

[Brief description of drawings]

The drawings show an embodiment of the filter connector according to the present invention.

FIG. 1 is a horizontal vertical sectional view of a filter connector.

FIG. 2 is a vertical and vertical sectional view of a filter connector.

FIG. 3 is a perspective view of a supporter.

FIG. 4A is an enlarged cross-sectional view of a hole portion of a supporter,
(B) is a bottom view of the hole portion.

FIG. 5 is a cross-sectional view showing a state in which connector pins are attached to the main body case.

FIG. 6 is a horizontal vertical sectional view showing a state in which a feedthrough capacitor is attached to a connector pin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body case 2 ... Through hole 5 ... Connector pin 6 ... Terminal part 7 ... Contact part 8 ... Neck part 9 ... Collar part 10 ... Penetrating capacitor 11, 12 ... Electrode 25 ... Rear shield case 27 ... Hole

Claims (1)

[Claims] 1. A main body case made of an insulating material and having a plurality of through holes formed at a predetermined pitch, a bar-shaped terminal portion, and a contact portion to which a mating plug is connected. The connector pin is press-fitted and housed in the through hole of the main body case, and has a straight cylindrical shape having electrodes on the inner and outer peripheral surfaces, and is fitted to the root of the terminal portion of the connector pin, and the terminal portion and the inner electrode are A soldered filter element, covering at least the upper surface of the main body case, the filter element is inserted into a plurality of holes formed at a predetermined pitch, and a shield case soldered to the outer peripheral electrode of the filter element, In the filter connector provided with, the connector pin has a straight neck portion having a narrow width immediately above the contact portion and a collar portion projecting to both sides, and the neck portion is a front portion. The filter connector is housed in a through hole of the main body case together with the contact portion.