JPH01292765A - Earth plate of connector - Google Patents

Abstract

PURPOSE:To improve the stability of earth connection by providing a plurality of outer contact segments extending outwardly nearly in one plane from both sides of frame part having an opening, and a plurality of reversed U shaped inner contact segments projecting from the opening of the metal panel in the same direction as the connector insertion portion. CONSTITUTION:An earth plate 6 with an opening 61a rises up at both side edges of a frame part 61 thereof, and has a plurality of reversed U shaped inner contact segments 63, connected at halfway point of said rising up portion to the adjacent contact segments by a connecting bar 63a, and a plurality of outer contact segments 64, extending outwardly in the same plane with the frame part 61 and bending upward slightly at the end portion thereof. When a mating connector 2 is inserted, a metal hood 23 is first guided into an insertion portion 14 to be positioned properly and enters between the inner contact segments 63 and a metal shell 13 of the insertion portion, and the ends of the reversed U shaped springs are subjected to a predetermined displacement so that they press the metal hood 23 of the mating connector at a plurality of positions with a suitable force to form a good earth connection. Thus, the stability of the earth contact is improved.

Description

[Detailed Description of the Invention] [Summary] This invention relates to an interface connector (for input/output external connection) with excellent electromagnetic shielding effect, and is particularly used with a device-side connector to improve ground connection with the mating connector. Regarding ground plates for connectors, the purpose of this project is to provide a ground plate that can be used with conventional metal shell type device-side connectors to improve the stability of the ground connection and improve the shielding effect for the connector part. A grounding plate sandwiched between a metal panel, the frame-shaped part having an opening for protruding the insertion part of the connector, and a metal panel extending outward from both sides of the frame-shaped part in substantially the same plane as the frame-shaped part. a plurality of outer contact pieces that contact the back surface of the panel; and a metal hood of a mating connector that protrudes from the opening of the metal panel in the same direction as the insertion part of the connector, is arranged to surround the insertion part, and is inserted. A plurality of inverted U-shaped inner contact pieces are provided around the periphery.

[Industrial application field]

The present invention relates to a connector for an ink face (for input/output external connection) with excellent electromagnetic shielding effect, and particularly to a grounding plate for a connector that is used together with a device-side connector to improve grounding connection with a mating connector.

With the spread of digital electronic devices in recent years, there are many opportunities for electromagnetic waves emitted from electronic devices to adversely affect the operation of other electronic devices.
It is important to take measures against agnetic interference (electromagnetic environment compatibility).

There is also an increasing demand for complete electromagnetic shielding for connectors that serve as interfaces between electronic devices and the outside world.

[Conventional technology]

FIG. 3 is a perspective view showing the structure of a conventional interface connector.

In the figure, 1 is the connector mounted on the device, 2 is the mating connector connected to the cable and inserted into the device side connector 1, 3 is the printed board on which the device side connector 1 is mounted, and 4 is the device side connector. This is a metal panel that makes up the housing.

The connector 1 is usually a female connector formed by covering a metal shell 13 of an insulator 12 in which a plurality of female contacts 11 are implanted, and has a substantially trapezoidal fitting part 1 on the front side that fits with a mating connector 2.
4 and mounting portions 15 at both ends, and is mounted and connected to the printed board 3 by soldering the terminal portions 11a of the contacts protruding from the rear to the pattern.

By incorporating the printed board 3 into the device,
The fitting part 14 with the mating connector 2 is made to protrude from the opening 41 of the metal panel 4, and both ends are attached using the mounting screws 17.
It is attached to the metal panel 4 by fastening with.

The mating connector 2 includes an insulator 22 that protrudes and holds the contact portion of the male contact 21 from the front, and a trapezoidal metal that surrounds the contact portion and covers the outer periphery of the fitting portion 14 of the device connector 2. It consists of a hood 23 and a metal cover 24 that protects the connection part of the cable 5. After the cable 5 in which a plurality of electric wires 51 are covered with a braided shield 52 is connected, the metal cover 24 is connected to the outer periphery of the 11 m shield 52. , attached to the metal shell 23. and metal hood 2
A convex portion 23a is provided on the inner surface of the connector 3 so as to be connected to the metal shell 13 covering the outer periphery of the fitting portion 14 of the device side connector l.

[Problem to be solved by the invention]

In the interface connector having the above-mentioned structure and installation method, the braided shield 52 of the cable is first connected to the metal panel of the device casing via the metal shell 13 of the female connector 2 from the metal shell of the male connector 2. 4, and the mounting screw 17 is connected to the frame ground pattern of the printed board 3 via the metal fitting 16, so that the environmental noise induced in the cable 5 falls to the frame ground of the device through the above path. It has become.

However, in the ground connection of the above route, the connection between the cable side connector and the device side connector is unstable because the connection between the cable side connector and the device side connector is by a convex part on the inner surface of the metal hood, which has poor spring properties and a small number of contact points. The connection between the metal shell 13 of the connector 1 and the metal panel 4 of the device casing is also incomplete because the connection at both ends, which are fastened with the mounting screws 17, does not necessarily come in close contact at parts other than the part 15, and therefore the signal cannot be transmitted. There was a problem in that the shielding effect of the metal shell or metal hood surrounding the outside of the wire was not sufficient.

The present invention was created in view of the above-mentioned problems, and provides a grounding plate that can be used with a conventional metal shell type device-side connector to improve the stability of grounding connection and improve the shielding effect on the connector part. With the goal.

[Means to solve the problem]

The above-mentioned problem is that the earth plate is sandwiched between the connector and the metal panel of the device, and includes a frame-shaped part having an opening for protruding the insertion part of the connector, and a frame-shaped part from both sides of the frame-shaped part. a plurality of outer contact pieces extending outward in substantially the same plane and contacting the back surface of the metal panel; protruding from the opening of the metal panel in the same direction as the insertion portion of the connector and disposed so as to surround the insertion portion; This problem is solved by the earth plate of the connector of the present invention, which is characterized in that it is provided with a plurality of inverted U-shaped inner contact pieces that contact the outside of the metal hood of the mating connector to be inserted.

[Effect]

The inner contact piece ensures good contact with the outside of the metal hood of the mating connector into which it is inserted, and the outer contact piece makes good contact with the metal panel, eliminating instability in the ground connection.

〔Example〕

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an external perspective view of a grounding plate according to the present invention, and FIG. 2 is a sectional view showing the mounting state of the grounding plate.

The grounding plate 6 of the present invention is configured so that it can be mounted on a metal panel of a device housing by covering the front side of a device-side connector having a metal shell as described above in FIG. That is, in FIG. 1, the ground plate 6 is made of a pressed product of a metal spring material, and has a frame-shaped part 61 having an opening 61a in the center from which the connector insertion part (14 in FIG. 2) protrudes. For mounting the connector at both longitudinal ends of the frame-shaped part 61, screw relief holes 62a with the same pitch as the pitch are provided. A plurality of inverted U-shaped inner contact pieces 63
and a plurality of outer contact pieces 64 extending outward on both sides on the same plane as the frame-shaped portion 61 and having tips bent slightly upward.

Next, with reference to FIG. 2, the dimensional relationship of each part will be explained with reference to the connectors that are attached together.

1 is a device side connector similar to the one described above, with female side contact 1
A metal shell 13 is placed over the front side of the insulator 12 in which the insulator 1 is implanted, and the metal shell 13 is held between the metal panel 4 so that its insertion portion 14 protrudes from the opening 41 of the metal panel 4 to the surface, and is fastened with a mounting screw (not shown). ing. At this time, ground [
6 has the insertion part 14 protruding from the opening 61a, is attached to the connector 1, and is inserted from the back side of the metal panel 4,
The frame portion 61 is designed to be held between the connector 1 and the connector 1.

The inner contact pieces 63 rising on both sides are formed at a lower height than the insertion part 14 of the connector so as to surround it, and are opposed to the metal shell 13 of the insertion part.

Also, the outer contact piece 64 had a slightly bent tip in its free state.
is displaced to be flush with the frame-shaped portion and presses the back surface of the metal panel 4 with a predetermined contact force, thereby forming a good electrical connection at a plurality of contact points on both sides of the connector.

When the mating connector 2, in which the contact portion of the male contact 21 implanted in the insulator 22 is surrounded by a metal hood 23, is inserted, the metal hood 21 is first inserted.
is guided to the insertion section 14, positioned correctly, and enters between the inner contact piece 63 and the metal shell 13 of the insertion section,
The tip of the inverted U-shaped spring is displaced to a predetermined position, and the metal hood 23 of the mating connector is pressed at multiple locations with appropriate contact force, thereby forming a good ground connection.

Therefore, the noise current from the external environment induced in the Wi group shield can flow through the metal case 24, the metal hood 23, the inner contact piece 63, and the outer contact piece 64 in this order to the metal panel 4 of the device through a good connection. , it is possible to reliably drop it to the frame ground without penetrating into the printed board 4, and furthermore, the conventional mounting screws and attachments can stably connect the metal panel to the printed board via the metal fittings.

〔Effect of the invention〕

By simultaneously incorporating the ground plate of the present invention into the metal panel of the device housing, the stability of the ground contact of the conventional interface connector with a metal shell is significantly improved, resulting in a connector with excellent EMI countermeasures. It becomes possible to easily realize the connection.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the appearance of the grounding plate of the present invention, FIG. 2 is a sectional view showing how the grounding plate is attached, and FIG. 3 is a diagram showing the structure of a conventional connector. In the figure, 1--connector, 11--female contact, 12--insulator, 13--metal shell,
14...insertion section, 2-mating connector,
21--Contact on the side, 22-Insulator, 23-Metal hood, 24--Metal case, 3-Printed board,
4-=metal panel, 41-opening,
5--cable, 6--ground plate, 61--frame-shaped portion, 61a--opening, 63---inner contact piece, 64--outer contact piece. 23rd Scaffold 9 and January's earth-obel tattoo paper are also in the coffin bar] $3 figure

Claims (1)

[Claims] A grounding plate (6) sandwiched between the connector (1) and the metal panel (4) of the device, comprising an opening (61a) through which the insertion portion (14) of the connector (1) projects. a frame-shaped part (61) having a frame-shaped part (61); and a plurality of outer parts led out from both sides of the frame-shaped part (61) in substantially the same plane as the frame-shaped part (61) and in contact with the back surface of the metal panel (4). A contact piece (64) protrudes from the opening (41) of the metal panel (4) in the same direction as the insertion part (14) of the connector (1), and
14), and a plurality of inverted U-shaped inner contact pieces (63) that contact the outside of the metal hood (23) of the mating connector (2) to be inserted. A grounding plate for a connector characterized by: