JPH0765906A - Filter built-in connector - Google Patents

Abstract

PURPOSE:To provide a connector with a built-in filter which contains a chip capacitor for use in an electronic appliance such as a communication apparatus, electric fittings for car, etc., which requires a low cost for assembly, and which is free from risk of being damaged by thermal stress. CONSTITUTION:At an insulation housing 2, a pair of recesses 4a, 4b capable of holding a chip capacitor 3 are furnished in the neighbourhood of an at the periphery of a terminal penetration hole 6, and electrode parts 7 at the two ends of the chip capacitor 3 are fitted by pressure in the recesses 4a, 4b by means of metal plating 5a, 5b. The chip capacitor 3 and a terminal 1 are fitted by pressure in the housing 2 so that the assembling cost is suppressed, and also it allows preventing thermal stress due to difference in the coefficient of thermal expansion and contraction.

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. 3 (a) and 3 (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 problems, a filter built-in connector according to 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 electrode parts at 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, to connect the hot side electrode and the electrode. 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. A metal plating 5a is applied as a hot-side electrode so as to conduct electricity, and a metal plating 5b is applied as a ground-side electrode on the recess 4b side of the outer peripheral portion with a certain distance from the hot-side electrode. The terminal 1 is press-fitted into the formed terminal through hole 6 to bring it into contact with the metal plating 5a which is the hot side electrode, and the electrode portions 7 at both ends of the chip capacitor 3 are provided in the vicinity of the terminal through hole 6 of the insulating housing 2 and the outer peripheral portion thereof, respectively. It is press-fitted and held in the recesses 4a and 4b of the above, and is brought into contact with the metal platings 5a and 5b of the hot side electrode and the ground side electrode respectively.

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 this 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, thermal stress caused by the difference in thermal expansion and contraction rate is prevented, and even if thermal expansion and contraction occur, the concave portion of the insulating housing 2 is depressed. 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.

In this embodiment, the chip capacitor 3
And the terminal 1 into the recesses 4a and 4 of the insulating housing 2, respectively.
Although it is only press-fitted into b and the terminal through hole 6, it is desirable to protect the chip capacitor 3 with a molding material in order to improve the environmental reliability of the chip capacitor 3.

[0017]

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.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of a connector with a built-in filter according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3A is a front sectional view of a conventional connector with a built-in filter. FIG. 3B is a side sectional view of the same.

[Explanation of symbols]

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

Claims (1)

[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 electrode is metal-plated with a certain distance, the terminal is press-fitted into the metal-plated terminal through hole, and the metal plating which is the hot-side electrode is brought into contact 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.