JP2592562Y2 - Filter connector and feedthrough capacitor for filter connector - Google Patents

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 feedthrough capacitor for removing high-frequency noise or the like flowing through a signal or power supply contact, and a feedthrough capacitor for such a filter connector.

[0002]

2. Description of the Related Art Recently, various kinds of noise have been generated in recent electronic devices as their transmission signals have become faster. Since this noise penetrates into other electronic devices and has a bad effect such as malfunction, various filter connectors for removing the noise have been considered. Among them, there is known a filter connector in which a contact is inserted through a central through hole using a through capacitor. One example is a filter connector disclosed in Japanese Patent Application Laid-Open No. 56-73935 shown in FIG. In this conventional filter connector, a contact 102 is inserted into a circular through hole of a feedthrough capacitor 101 and soldered. Feedthrough capacitor 101 is conductive plate 10
4 is soldered to form a ground conductive path.

However, in this feed-through capacitor, since the through-hole is circular, when the solder is soldered to a contact having a substantially rectangular cross section, unevenness occurs in the soldered portion, which adversely affects the performance of the feed-through capacitor. That is, the difference between the portion where the distance between the outer surface of the contact and the inner surface of the through hole is large and the portion where the distance is small increases, and the solder flows to the small portion. Therefore, a cavity in which solder does not deposit is formed in a portion having a large space, and in a severe case, a cavity is formed which extends over the entire length of the through hole. Therefore, there arises a problem that the mounting strength of the contact is reduced and the electrical characteristics of the feedthrough capacitor are deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter connector and a feedthrough capacitor for the filter connector which can improve the above-mentioned drawbacks of the conventional filter connector.

[0005]

The filter connector according to the present invention includes a contact and a through capacitor having a through hole into which the contact is inserted and being grounded, and the contact is soldered at a portion of the through hole. In the filter connector, the contact has a cross-sectional shape having a length and a short outer dimension that are substantially orthogonal to at least a portion of the through-hole, and a cross-sectional shape of the through-hole of the through-capacitor is equal to a longitudinal axis of the cross section of the contact. It is characterized in that it has a substantially elliptical shape having a substantially matching major axis.

In addition, the feedthrough capacitor for a filter connector according to the present invention has a through hole through which a contact is inserted, and the through hole for the filter connector is soldered to the contact at the portion of the through hole and grounded.
A cross-sectional shape of the through-hole into which the contact having a length and a short external dimension whose cross-section is substantially orthogonal at least at a portion of the through-hole is inserted has a major axis having a major axis substantially matching the longitudinal axis of the cross-section of the contact. Characterized by a circular shape

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a sectional view of a preferred embodiment of a filter connector 1 according to the present invention. The filter connector 1 is an insulating housing 4 having a concave portion 2 into which a mating connector (not shown) is inserted, a shielding plate 60 attached to the rear of the housing 4, and an opening 62 of the shielding plate 60, which is inserted and soldered. The through-capacitor 50 and the contact 6 which is inserted and soldered into the through-hole 52 of the through-capacitor 50, the auxiliary plate 8 through which the through-capacitor 50 is inserted and held, and the contact 6
Is provided with a ferrite plate 10 to be inserted.

The feedthrough capacitor 50 has an oblong through hole 52 as shown in FIG. The contact 6 is shown by a virtual line in the figure. FIG.
In the cross-sectional view of FIG. 4B showing the AA cross section of FIG. 4A, a flange 54 is formed to protrude from the main body portion 56 to the outside in the axial direction over the entire circumference. Since the flange 54 is soldered in contact with the auxiliary plate 8 at the time of soldering, it is more firmly fixed. The outer surface 58 of the main body 56 has a substantially oval cross section as shown by a broken line in FIG.

As shown in FIG. 3, the feedthrough capacitor 50 having an elliptical outer shape is inserted into an opening 62 of a shield plate 60 corresponding to the outer diameter of the feedthrough capacitor 50, and is soldered to the shield plate 60.
In the embodiment of FIG. 1, the auxiliary plate 8 having the similar oval opening 12 is also soldered to reinforce the mounting of the feedthrough capacitor 50. Although the shielding plate 60 shown in FIG. 1 is assembled to the housing 4 by insert molding, it may be attached by bolts 20 as in the filter connector 1 'of another embodiment shown in FIG. The same components of the filter connectors 1 and 1 'are denoted by the same reference numerals.

The contact 6 inserted into the through hole 62 of the feedthrough capacitor 50 has an elongated shape such as a square or a rectangular cross section. The contact 6 is bent at the bent portion 14 and one end is inserted into the printed board 16 and soldered. However, the contact 6 is bent in a thin plate thickness direction having a rectangular cross section so as to be easily bent at the bent portion. Contact 6 is a feedthrough capacitor
It is inserted into 50 through holes 52 and soldered. This state is shown in FIGS. In this embodiment, it can be seen that the rectangular section 18 of the contact 6 is inserted into the through hole 52 of the feedthrough capacitor 50 soldered to the shielding plate 60 and the auxiliary plate 8. The through hole 52 of the feedthrough capacitor 50 has an oval shape corresponding to the rectangular cross section of the contact 6. When this portion is soldered, the solder between the inner surface of the through hole 52 and the rectangular cross section 18 of the contact 6 Are substantially uniformly melted and soldered. That is, the solder flows without forming a cavity between the contact 6 and the feedthrough capacitor 50.

The ferrite plate 10 is bonded and fixed in the housing 4 with an epoxy adhesive or the like. The feedthrough capacitor 50 and the contact 6 are inserted into the concave portion 22 and the hole 24 of the ferrite plate 10, respectively.

While the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. The through holes of the feedthrough capacitors are oval in shape, but it will be readily understood that they also include oval or similar shapes.
The external shape of the feedthrough capacitor may be elliptical or circular.

[0014]

According to the filter connector of the present invention, the cross-sectional shape of the contact has a long and short external dimension at least in the through hole of the feedthrough capacitor, and the through hole of the feedthrough capacitor has a substantially oval shape. The soldering of the contact and the feedthrough capacitor is extremely good, and the contact and the feedthrough capacitor are hardly separated due to poor soldering, and the electrical characteristics of the feedthrough capacitor are not impaired.

Further, in the feedthrough capacitor for a filter connector of the present invention, the cross-section of the through-hole is substantially elliptical corresponding to the cross-sectional shape of the contact, so that the solderability of the contact is improved. That is, since the solder spreads substantially uniformly between the inner surface of the through hole and the contact, no cavity is formed.
Therefore, there is no decrease in the mechanical strength of the solder connection portion due to the cavity, and a feedthrough capacitor with high electrical connection reliability is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a preferred embodiment of the filter connector of the present invention.

FIG. 2 is a rear view of another embodiment of the filter connector.

FIG. 3 is a front view of a shielding plate used for the filter connector of FIG. 2;

FIG. 4a is a front view of the feedthrough capacitor for a filter connector of the present invention.

FIG. 4B is a cross-sectional view of the feedthrough capacitor taken along line AA of FIG. 4A.

FIG. 5 is a sectional view of a conventional filter connector.

[Explanation of symbols]

 1 Filter connector 6 Contact 50 Through capacitor 52 Through hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/66-13/719 H01G 4/42

Claims (2)

(57) [Scope of request for utility model registration] 1. A contact capacitor having a contact and a through hole into which the contact is inserted and grounded,
In the filter connector in which the contact is soldered at a portion of the through hole, the contact has a cross-sectional shape having a length and a short outer dimension that are substantially orthogonal to at least the portion of the through hole, and a cross section of the through hole of the through capacitor. The filter connector according to claim 1, wherein the shape is a substantially elliptical shape having a major axis substantially coincident with a longitudinal axis of the cross section of the contact. 2. A method according to claim 1, further comprising a through hole through which the contact is inserted.
In the feedthrough capacitor for a filter connector, which is soldered to the contact and grounded at a portion of the through hole, at least a portion of the through hole through which the contact having a long and short outer dimension whose cross section is substantially orthogonal is inserted. A feed-through capacitor for a filter connector, wherein a cross-sectional shape of the hole is a substantially elliptical shape having a major axis substantially coincident with a longitudinal axis of the cross section of the contact.