JPH0765902A - Filter connector - Google Patents

Abstract

PURPOSE:To provide a filter connector which can assemble a filter element in the form of a straight cylinder locating correctly. 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. The co-axial capacitor 10 is fitted fast in a hole 16 on a plate-form supporter 15 installed between the body case 1 and a rear shield case 25.

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.

By the way, in this type of filter connector, one of the problems is to reduce the cost by improving the assembling property. As one method, Jitsuko Sho 5
It is known to form a flange portion on the outer peripheral portion of a feedthrough capacitor as disclosed in Japanese Patent Publication No. 9-27022.
When the flange part is sandwiched between the main body case (insulator) and the shield case, the feedthrough capacitor is temporarily fixed, and when the inner and outer electrodes of the feedthrough capacitor are soldered (dip solder) to the connector pin and the shield plate, the filter connector is used. This prevents the feedthrough capacitor from dropping and shifting when it is inverted. However, the use of a flanged capacitor has a problem that the outer diameter becomes large and it cannot be applied to a product having a narrow connector pin pitch.

In order to improve this point, actual fairness 1-21
As disclosed in Japanese Patent No. 548, it has been proposed to eliminate both sides of the flange portion of the feedthrough capacitor. But,
At the time of assembly, it is necessary to align the directionality of the lacking portions of each capacitor, and the assembling property is not necessarily improved. Furthermore, in order to install feedthrough capacitors with a collar at a narrow pitch, Japanese Utility Model Publication No. 3-38955, Japanese Utility Model Publication No. 2
As disclosed in Japanese Patent Publication No. 146774, it is also proposed that the feedthrough capacitors be inserted in opposite directions for each adjacent capacitor and that the flange portions are wrapped and installed. However, this makes the soldering work extremely difficult.

That is, in the conventional filter connector, a filter element with a collar was generally used, but there was a problem in terms of assemblability and positioning to cope with a narrow pitch. Moreover, the attachment of the collar portion itself deteriorates the moldability of the element, and it is difficult to reduce the diameter.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to use a straight cylindrical filter element having no brim portion, which is excellent in moldability and can be reduced in diameter, and is easy to assemble and It is to provide a filter connector having good positioning properties. In order to achieve the above object, a filter connector according to the present invention includes a main body case, 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 the main body case. A shield case that covers at least the upper surface,
It is composed of a plate-shaped supporter made of an insulating material for temporarily fixing the filter element.

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. 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 in the root of the terminal portion of the connector pin, and is press-fitted and fixed in a plurality of holes formed in the supporter at a predetermined pitch. Next, the shield case is put on the main body case. At this time, the filter element is inserted into the plurality of holes formed at a predetermined pitch in the shield case,
The supporter is sandwiched between the upper surface of the main body case and the shield case.

In the present invention as described above, since the filter element has a straight cylindrical shape, it can be easily formed and has a small diameter, and it can be installed at a narrow pitch.
Further, since the filter element is press-fitted and fixed in the hole of the supporter and the supporter is sandwiched between the main body case and the shield case, the filter element may drop even when the connector is inverted when soldering the filter element. , There is no risk of misalignment.

Further, in the filter connector according to the present invention, it is preferable that at least one small protrusion is formed on the inner wall portion of the hole of the supporter. Since the small protrusions press-contact the outer peripheral surface of the filter element to hold the filter element, it is possible to prevent the filter element from being damaged due to excessive stress.

[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 embodiment, the feedthrough capacitor 1
0 is press-fitted and held in the hole 16 of the supporter 15, and the supporter 1
Since 5 is sandwiched between the main body case 1 and the rear shield case 25, the feedthrough capacitor 10 will not drop or be displaced even if the filter connector is reversed during soldering. Moreover, the holes 16 of the supporter 15
By forming the small protrusions 17 on the feedthrough capacitor 1,
It is prevented that 0 is pressed into the hole 16 in a state where the top of the small protrusion 17 is crushed and an excessive stress is 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.

Further, in the above embodiment, 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 the present embodiment, the distortion generated in the connector pin 5 is absorbed by the deformation of the neck portion 8 and a defect such as poor conduction does not occur. Moreover, since the neck portion 8 has a straight shape, when the connector pin 5 is press-fitted into the through hole 2 of the main body case 1, the neck portion 8 is
Can be pressed in smoothly 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 into the terminal portion 6 is easy.

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 10 ... Penetrating capacitor 11, 12 ... Electrode 15 ... Supporter 16 ... Hole 17 ... Small projection 25 ... Rear shield case 27 ... Hole

Claims (2)

[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, A plate-like body made of an insulating material and having a thickness approximately half the length of the filter element, in which the filter element is press-fitted and fixed in a plurality of holes formed at a predetermined pitch. In a filter connector which is characterized in that and a supporter, which is sandwiched between the upper surface and the shield case of the main body case. 2. The filter connector according to claim 1, wherein at least one small protrusion that is pressure-bonded to the outer peripheral surface of the filter element is formed on the inner wall portion of the hole of the supporter.