JPS594833B2 - electrical connectors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electrical connectors, and more particularly to electrical connectors containing a housing carrying a plurality of ten electrical terminals, at least one electrical terminal holding a tubular filter device.

Many modern electrical connectors include filter devices that act to filter out unwanted signals and interference in the circuitry passing through one or more terminals on the connector.

15 A particularly useful form of filter for this purpose is the tubular filter device disclosed in US Pat. No. 3,743,978.

The tubular filter device described above can be mounted on a male electrical terminal, with the inner electrode of the device electrically coupled to the terminal 20 and the outer electrode of the device electrically coupled to the ground conductor of the connector.

If the connector has a plurality of such filters, the ground conductor is often formed of a rigid metal plate, with the filter devices passing through individual apertures in the plate to connect the outer electrode of each filter device. It shall be electrically bonded to the earth plate by soldering or the like.

However, using solder requires time and effort to assemble the connector, and the weight of the connector also increases by 30%.

To overcome these drawbacks, the hole is defined by a plurality of inwardly extending protrusions spaced apart from each other at the periphery, the protrusions bending when the filter device is inserted into the hole. Attempts have been made to replace the rigid metal plates described above with thin, resilient sheets of metal foil which engage the filter device 35 and thereby provide the desired electrical connection.

However, when using the above-mentioned ground plate, the protrusions are easily damaged when inserting and removing the filter device, so reliable electrical connection cannot always be achieved. .

According to the invention, the housing comprises a housing carrying a plurality of electrical terminals, at least one electrical terminal holding a tubular filter device, and a grounding plate, the filtering device being mounted on the grounding plate. Through the through-holes, the electrodes of the filter device are electrically connected to the ground plate, the ground plate containing a hard metal plate, and on one side of the metal plate. metal foil sheets are stacked on top of each other, the through hole is formed of an opening provided in the metal plate and a hole provided in the metal foil sheet, the through hole being aligned with each other, and the hole in the metal foil sheet is aligned with the hole. an electrical connector having a plurality of mutually spaced and inwardly projecting protrusions on the periphery of the electrical connector, the protrusions forming a connection between the associated filter device and the associated wall of the aperture in the metal plate; An electrical connector is provided that is compressively sandwiched between. The connector according to the invention is easy to manufacture and assemble, and when the filter device is pushed into the opening in the ground plate, the protrusions on the metal foil sheet provide the desired electrical connection, and the rigid metal plate connects the metal foil to the ground plate. It acts to support the seat and protect the protrusions from becoming permanently deformed and damaged due to overstress.

An electrical connector according to the invention will be described below with reference to the accompanying drawings.

The electrical connector shown in FIGS. 1 and 2 includes a housing 1 carrying a plurality of post-shaped electrical terminals 2. The electrical connector shown in FIGS.

The exact shape of the housing 1 and the invisible end of the terminal 2 are not important for the invention and will not be discussed here. One or more terminals 2 are described in U.S. Pat.
43! ) Holds the tubular filter device 3 disclosed in No. 78.

The filter device 3 is mounted on the terminal 2 by a contact spring 4 which is received within the filter device 3 and fitted onto the terminal 2, connecting the inner electrode of the filter device 3 and the terminal 2 electrically. join to. The connector consists of a composite earth plate 5 (third
and FIG. 4).

The metal plate 6 has a plurality of openings 8 and the metal foil sheet 7 has a plurality of holes 9, each aligned with a respective opening 8 in the metal plate 6.

The hole 9 is defined by a plurality of protrusions 10 spaced apart from each other and projecting inwardly at its periphery. Composite earth plate 5 has a bolt 11 (second
(Fig.) is fixed to the housing 1.

As best shown in FIG.
When mounted on the terminal 2, the filter device 3 passes through the earth plate 5.

In this case, the projections 10 of the metal foil sheet 7 are connected to the filter device 3.
and the wall of the opening 8 in the metal plate 6, the protrusion 10 thus achieving the desired electrical connection between the outer electrode of the filter device 3 and the earth plate 5. Since the filter device 3 is electrically isolated from the housing 1 by an insulating spacer plate 12,
The housing 1 may be made of metal.

When the above-mentioned connection was experimented, the metal plate 6 had a thickness of 0.
．． 051! U (0.002 inch) cold rolled steel,
Metal foil sheet 7 has a thickness of 0.07 mm (0.003 inch)
The bond could be made with ASTM Alloy No. 24, and the metal foil sheet 7 was secured to the metal plate 6 by a conductive epoxy adhesive material. As best shown in FIG. 4, since the protrusion 10 penetrates the metal plate 6 and protrudes beyond the lower surface of the metal plate 6, the protrusion 10 tends to return inward due to its elasticity, and The outer electrode of the filter device 3 is then gripped by the projection 10. If the terminal 2 is of a type that does not carry a filter device 3, the protrusion 10 of the hole 9 in the metal foil sheet 7 is removed so that such terminal 2 does not come into contact with the earth plate 5 and be earthed.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the electrical connector, Figure 2 is a side elevation view of the assembled connector, Figure 3 is a partial top view of the connector's ground plate, and Figure 4 is a portion of the connector. 1 shows a filter device in cross-section; FIG. 1...Housing, 2...Terminal, 3.
... Filter device, 6 ... Metal plate, 7 ... Metal foil plate, 8 ... Opening, 9 ... Hole, 10 ... ...Protrusion, 12...
...Insulating spacer plate.

Claims (1)

Claims: 1. A housing 1 carrying a plurality of electrical terminals, at least one electrical terminal 2 holding a tubular filter device 3;
an earth plate 5, the filter device 3 passes through a through hole provided in the earth plate 5, and the electrode of the filter device is electrically connected to the earth plate. , the earth plate 5
comprises a hard metal plate 6, on one side of which is superimposed a metal foil sheet 7, said through holes being aligned with each other, an opening 8 provided in said metal plate 6, and said metal foil The electrical connector comprises a hole 9 provided in a sheet 7, and the hole 9 of the metal foil sheet 7 is provided with a plurality of protrusions 10 on the periphery of the hole 9, spaced apart from each other and protruding inwardly. An electrical connector characterized in that the protrusion 10 is compressively sandwiched between the associated filter device 3 and the associated wall of the opening 8 of the metal plate 6. 2. The electrical connector according to claim 1, characterized in that the protrusion 10 that contacts the filter device 3 completely penetrates the metal plate 6 and protrudes beyond the other surface of the plate 6. electrical connector.