JPH0864310A - Filter-built-in connector - Google Patents

Abstract

PURPOSE: To provide a filter-built-in connector which is not damaged by thermal stress and lower the assembly cost, regarding the filter-built-in connector which has a chip capacitor in the inside and is used for electronic apparatus, e.g. communication equipments, automotive electronic apparatuses, etc. CONSTITUTION: A pair of recessed parts 4a, 4b which can hold a chip capacitor 3 in an insulating housing 2 are formed in the vicinity of a terminal through hole 6 and its outer circumference and electrode parts 7 in the both ends of the chip capacitor 3 are press-inserted into the recessed parts 4a, 4b by plated metals 5a, 5b. Then, the chip capacitor 3 and a terminal 1 are press inserted to the insulating housing 2 respectively, so that the assembly cost can be lowered and thermal stress due to the difference between thermal expansion and contract coefficients can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in high-sensitivity equipment such as communication equipment and electrical equipment for automobiles, and is used as a filter for removing interference radio waves from the outside and unnecessary radio waves generated in the equipment. The present invention relates to a filter built-in connector having a built-in chip capacitor.

[0002]

2. Description of the Related Art In recent years, connectors with a built-in filter have been used as noise countermeasure parts for high-sensitivity equipment such as communication equipment and automobile electrical equipment.

A conventional connector with a built-in filter will be described with reference to FIGS. 7 (a) and 7 (b). As shown in the figure, 10 is an insulating housing, and a plurality of terminals 9 are held through a bottom wall 14 of the housing at a constant pitch. A small hole 15 is formed on the outside of the bottom wall 14 so as not to directly contact the terminals 9. Metal plates 11 are stacked, and each of the terminals 9 and the metal plate 11 are stacked.
An annular capacitor 13 as a filter is electrically connected and fixed between and by soldering the electrodes on the upper and lower surfaces thereof with solder 17, respectively.

Reference numeral 12 denotes a metal case for shielding the entire connector with a built-in filter. The metal plate 11 and the metal case 12 are electrically connected and fixed by soldering with a solder 18.

Further, each terminal 9 is bent at a fixed position in the vertical direction to serve as a connection terminal for a printed circuit board of a device used, and 16 is a grounding portion for connecting to a ground pattern on the printed circuit board.

The operation of the filter built-in connector configured as described above will be described below. First,
The conduction noise flowing through each terminal 9 is removed by the annular capacitor 13, and the removed conduction noise is removed by the metal plate 11,
It flows through the metal case 12 and the earth portion 16 to the earth pattern on the printed circuit board. Further, the metal plate 11 and the metal case 12 shield the connector with a built-in filter to shield radiation noise.

[0007]

However, in the above-mentioned conventional configuration, in order to solder a large number of annular capacitors 13, a process capable of soldering is performed on the metal plate 11 with thick solder plating. Ring-shaped capacitor 13
, The ring-shaped solder is further passed through the high-temperature conveyor furnace to melt the solder plating and the ring-shaped solder, and each terminal 9 and the annular capacitor 13,
The annular capacitor 13 and the metal plate 11 are soldered together, and then the metal plate 11 and the metal case 12 are soldered together with the solder 18.

Therefore, the metal plate 11 thickly solder-plated and the ring-shaped solder are required, resulting in high cost, and a high-temperature conveyor furnace is required as a soldering device. Further, due to the difference in thermal expansion and contraction rates of the insulating housing 10 and the metal plate 11, thermal stress is generated in the annular capacitor 13.
In addition, there is a problem that the annular capacitor 13 is damaged in an extreme case.

[0009]

In order to solve the above-mentioned problems, a filter built-in connector of the present invention comprises an insulating housing having a plurality of terminals penetratingly held and a plurality of chip capacitors, and the insulating housing has a chip capacitor. A pair of recesses that can hold the terminal through hole and the outer peripheral portion are provided, and one of the recesses provided near the terminal through hole and the terminal through hole is electrically connected, and metal plating is performed as the hot side electrode, As a ground-side electrode, a metal plating is applied to the recess side of the outer peripheral portion with a certain distance from the hot-side electrode, and the terminal is press-fitted into a metal-plated terminal through hole to form a metal-plated hot-side electrode. And the electrodes on both ends of the chip capacitor are press-fitted in the vicinity of the terminal through hole of the insulating housing and in the recesses of the outer periphery, respectively. Scan side electrodes respectively of the metal plating to be contact conduction is allowed configuration.

[0010]

With this configuration, the parts to be used are only the metal-plated insulating housing, the chip capacitor and the terminal, and the assembling method can be performed by press-fitting the chip capacitor and the terminal into the insulating housing, so that the assembling cost is low and the chip capacitor is low. By press-fitting the terminal and the terminal into the same insulating housing, it is possible to prevent the thermal stress generated due to the difference in thermal expansion and contraction rates.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A filter built-in connector of the present invention is shown in FIG.
This will be described with reference to the embodiment shown in FIG. In the figure, 2 is an insulating housing that holds a plurality of terminals 1 through,
A pair of recesses 4a and 4b capable of holding the chip capacitor 3 in the insulating housing 2 are provided in the vicinity of the terminal through hole 6 and the outer peripheral portion, and the terminal through hole 6 and one recess 4a provided near the terminal through hole 6 are formed. As a hot-side electrode, metal plating 5a is provided only on the protruding portion of the insulating housing 2 so as to conduct electricity.
Then, metal plating 5b is applied to the recess 4b side of the outer peripheral portion as an earth side electrode with a certain distance from the hot side electrode, and the terminal 1 is press-fitted into the metal plated terminal through hole 6, The electrode portion 7 at both ends of the chip capacitor 3 is brought into contact with the metal plating 5a which is the hot side electrode, and is pressed and held in the vicinity of the terminal through hole 6 of the insulating housing 2 and the concave portions 4a and 4b of the outer peripheral portion, respectively. It has a structure in which the electrodes and the ground-side electrodes are brought into contact with the metal platings 5a and 5b respectively. (Since the metal plating 5a is formed on the protruding portion of the insulating housing 2, the terminals 1 are not electrically connected to each other. It is.).

Further, each terminal 1 is vertically folded at a fixed position to serve as a connection terminal for a printed circuit board of a device used, and the protrusion 8 of the insulating housing 2 is connected to a ground pattern on the printed circuit board. It is a connection part.

The operation of the filter internal connector constructed as above will be described. First, the conduction noise flowing through each terminal 1 is removed by the chip capacitor 3 through the metal plating 5a, and the removed conduction noise is removed by the metal plating 5b. As described above, the protrusion 8 of the insulating housing 2 is connected to the ground pattern on the printed circuit board (not shown) to flow to the outside. Further, the metal plating 5b shields the filter built-in connector and shields the radiation noise. At this time, the metal plating 5b is as thick as possible and has a large area to improve the radiation noise shielding effect.

As described above, according to the present embodiment, the metal plating 5a, 5b is applied, and the pair of recesses 4a, 4b capable of holding the chip capacitor 3 are provided in the insulating housing 2. The parts used to perform the function are the metal-plated insulating housing 2
The chip capacitor 3 and the terminal 1 can be assembled by pressing the chip capacitor 3 and the terminal 1 into the recesses 4a and 4b of the insulating housing 2 and the terminal through hole 6, respectively. The number of man-hours is small, the assembly cost is low, and the cost can be reduced.

Further, by press-fitting the chip capacitor 3 and the terminal 1 into the same insulating housing 2, the thermal stress caused by the difference in thermal expansion / contraction rate is prevented, and even if the thermal expansion / contraction occurs, the concave portion of the insulating housing 2 is formed. 4a,
4b and the press-fitted portions of the electrode portions 7 at both ends of the chip capacitor 3 can be slightly changed to alleviate mechanical stress and prevent damage to the chip capacitor 3.

FIGS. 3 to 6 show other embodiments of the present invention, in which mechanical stress at the time of press-fitting into the electrode portion 7 is relieved to prevent damage to the chip capacitor 3 and This is aimed at securing a more appropriate contact pressure.

In the following description, the same parts as those in the embodiment of FIG. 1 are designated by the same reference numerals, and the description will be omitted. 4a ₁ is a metal plating for press-fitting the terminal 1 and the electrode 7 of the chip capacitor 3. 5a is a groove portion between the protrusions of the insulating housing 2.

In the above embodiment, as compared with the embodiment of FIG. 1, since the electrodes 7 are only press-fitted and sandwiched by the protrusions on both sides, the mechanical stress due to the press-fitting is alleviated, and the electrical resistance is reduced. Physical contact is secured. In addition, the groove 4
The inside a ₁ (not shown) through holes of the terminals 1 are provided to be electrically connected to the groove 4a ₁ by course metal plating 5a, is the same in the following examples.

In another embodiment of FIG. 4, a groove 4a ₂ is provided which closes the protruding portion of the insulating housing 2 on the side opposite to the side where the electrode 7 of the chip capacitor 3 is inserted. While increasing the strength against press fitting of the part,
The terminal 1 is intended to relieve mechanical stress on the electrode 7 of the chip capacitor 3.

FIG. 5, FIG. 6 is a H-shaped protrusions of the insulating housing 2, a groove 6a of the terminal 1 is inserted, 6b, the groove 4a _3, 4a ₄ where the electrode 7 of the chip capacitor 3 is inserted is provided However, the difference between the embodiments of FIGS. 5 and 6 is that the height of the protrusion connecting both sides of the protrusion is lowered in FIG.

That is, in FIG. 5, the side into which the terminal 1 is inserted is formed as a groove, so that the mechanical stress on the projecting portion of the insulating housing 2 when the terminal 1 is inserted is relaxed, and that in FIG. 6 is. By lowering the mechanical stress, the mechanical stress applied to the electrode 7 of the chip capacitor 3 is further alleviated.

In each of the above embodiments, the terminal 1 of the chip capacitor 3 is only press-fitted into the recess or groove of the insulating housing 2 or the terminal through hole, but the reliability of the chip capacitor 3 with respect to the environment is improved. Therefore, it is desirable to protect the chip capacitor 3 with a molding material.

[0023]

As described above, according to the present invention, metal plating is performed and a pair of recesses capable of holding the chip capacitor 3 are provided in the insulating housing, so that the number of assembling steps is small, the assembling cost is low, and the cost is reduced. Becomes possible,
Further, it is possible to realize an excellent connector with a built-in filter that can prevent the chip capacitor 3 from being damaged by the thermal stress generated by the difference in thermal expansion / contraction rate.

In the case where the electrode of the chip capacitor is press-fitted and sandwiched by the groove having the recess and the terminal through hole provided on the outer periphery of the protruding portion of the insulating housing, one of the electrodes forms the groove. Since it is sandwiched by the wall of the portion, it is possible to relieve the mechanical stress when the electrode is press-fitted.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of an embodiment of a connector with a filter according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is an exploded perspective view of a main part of the other embodiment.

FIG. 4 is an exploded perspective view of a main part of the other embodiment.

FIG. 5 is an exploded perspective view of essential parts of the other embodiment.

FIG. 6 is an exploded perspective view of essential parts of the other embodiment.

FIG. 7A is a front sectional view of a conventional connector with a built-in filter, and FIG. 7B is a sectional view of the same side.

[Explanation of symbols]

1 Terminal 2 Insulation Housing 3 Chip Capacitor 4a, 4b Recess 4a ₁ , 4a ₂ , 4a ₃ , 4a ₄ Groove 5a, 5b Metal Plating 6 Terminal Through Hole 7 Electrode

Claims (2)

[Claims] 1. A connector with a built-in filter, which comprises an insulating housing having a plurality of terminals penetratingly held therein and a plurality of chip capacitors, wherein a pair of recesses capable of holding the chip capacitor are provided in the insulating housing in the vicinity of the terminal through hole and the outer peripheral portion. The metal is plated as the hot-side electrode so that the terminal through-hole and one recess provided near the terminal through-hole are electrically connected to each other. The side electrodes are metal-plated at a certain distance, and the terminals are press-fitted into the metal-plated terminal through holes to make contact with the metal plating that is the hot-side electrode, and the electrode parts at both ends of the chip capacitor are Press in the vicinity of the terminal through hole of the insulating housing and the concave part of the outer periphery to make contact with the metal plating of the hot side electrode and the ground side electrode respectively. A connector with a built-in filter. 2. A filter built-in connector comprising an insulating housing having a plurality of terminals penetratingly held therein and a plurality of chip capacitors, wherein a pair of recesses and grooves capable of holding a chip capacitor are provided on a protruding portion of the insulating housing. The concave portion is provided on the outer peripheral portion, and the terminal through hole is provided in the groove portion. Metal plating is applied as the hot side electrode so that the terminal through hole and the groove portion provided with the terminal through hole are electrically connected, respectively, and the concave portion side of the outer peripheral portion is provided. As a ground side electrode, metal plating is performed at a certain distance from the hot side electrode, the terminal is press-fitted into the metal plated terminal through hole, and the metal plating that is the hot side electrode is brought into contact conduction, and The electrodes on both ends of the chip capacitor are press-fitted into the groove of the insulating housing and the recess of the outer circumference, respectively, and the hot side electrode and the ground side electrode are plated with metal. A connector with a built-in filter, which is brought into contact with and electrically connected to.