JP2002151879A - Shielding structure and shield cover for connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of attaching a shield cover being not easy and a special ground structure being required, when a contact terminal on the rear surface of a back board needs be covered with the shield cover for coping with of EMI for an electronic equipment unit. SOLUTION: The shield cover 3, formed into a box shape with a conductive material and having a plurality of contact insertion holds, is mounted on contact terminals 2a on connectors 2, exposed from the rear surface side of the back board 1, by inserting the terminals 2a into the insertion holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure and a shield cover for a connector in an electronic equipment unit.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing a shield structure in a conventional electronic device unit.

[0003] A back board 41 composed of a printed wiring board
The back board connector 42 is mounted on the front surface (the surface not shown in the figure), and the contact terminals 42 a of the back board connector 42 protrude from the back surface of the back board 41.

[0004] The back board 41 is fixed to a unit frame 44 which is a housing.
electromagnetic Interferenc
e. A shield cover 43 for preventing electromagnetic wave interference is attached.

A package connector 46 is mounted on a printed wiring board as a package 45. The package 45 is inserted into the unit frame 44 along a rail (not shown) provided inside the unit frame 44, and The connector 46 and the backboard connector 42 are fitted.

[0006]

The electronic equipment unit E
To prevent MI, the unit frame 44 is grounded, but the contact terminals 42 on the back side of the back board 41 are connected.
Since a is a noise source, it is necessary to cover the back surface of the unit frame 44 with a shield cover 43 such as a metal cover.

However, in order to contact the unit frame 44 with the shield cover 43 for ground connection, a solid pattern is formed on the back side of the unit frame 44, or the back side of the unit frame 44 is processed to form the shield cover 43. For example, it is necessary to form a contacting part, and a screw is required for fixing, and simplification of mounting has been required.

[0008]

In order to solve the above-mentioned problems, the present invention provides a shield cover having a plurality of contact insertion holes formed in a box shape of a conductive material on a contact terminal on the back surface of a connector. The contact terminal is mounted by inserting the contact terminal into the contact insertion hole.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a perspective view showing a shield cover of the first embodiment, and FIG. (B) is the figure seen from the front side.

In FIG. 1, the back board 1 is basically the same as the conventional one, but FIG. 1 shows an example in which one connector 2 is mounted.

A plurality of contact terminals 2a of the connector 2 are exposed and exposed on the back side of the back board 1.

The shield cover 3 is formed of a conductive material in the shape of a box, and is exposed on the back side by inserting the contact terminals 2a into a plurality of contact insertion holes 3a (see FIG. 2) provided in the shield cover 3. The shield cover 3 is attached to each connector 2 so as to completely cover all the contact terminals 2a.

As shown in FIG. 2, the shield cover 3 is formed into a box shape by, for example, bending a metal plate, and as shown in FIG. A contact insertion hole 3a is provided.

The contact insertion hole 3a is
Since a is press-fitted, it is more preferable to make a cut so as to have a certain degree of spring property.

Although the folded portions 3b are formed on both left and right sides in the figure, they may be formed vertically, or may be formed vertically and horizontally.

Therefore, the contact insertion holes 3a may be provided in the upper and lower folded portions, or may be provided in the upper, lower, left and right directions.

The contact insertion hole 3a may be formed so as to fit with the outermost contact terminal 2a among the contact terminals 2a exposed on the back side of the back board 1 as shown in FIG.

The space between the two folded portions 3b is open,
Contact terminals 2a other than the outermost contact terminals 2a
Is configured not to contact the shield cover 3.

Contact insertion hole 3a of shield cover 3
Of the connector 2 mounted on the back board 1 by making the outermost contact terminal 2a electrically connected to the shield cover 3 and electrically connected to a ground pin.
MI measures can be taken.

In order to use the contact terminal 2a as a ground pin, the contact terminal 2a may be connected to a terminal of the substrate which is grounded.

The contact terminals 2a other than the outermost terminals, which are not ground pins, are used as signal pins.

Incidentally, the case where the two rows of the outermost contact terminals 2a are all ground pins is shown as an example.
It is also possible to use only a part of the two rows of contact terminals 2a as ground pins.

In this case, the folded portion 3b may be formed only in a portion where the contact insertion hole 3a corresponding to a part of the contact terminal 2a is formed to provide the contact insertion hole 3a.

However, considering the mounting strength of the shield cover 3, it is not desirable to make the contact insertion holes 3a too small.

It is also possible to place the earth pin on the inside instead of the outside, but it is necessary to devise a way to prevent the signal pin from coming into contact with the shield cover 3. At least the outermost contact terminal 2a is connected to the earth pin. The structure is simple and appropriate.

As described above, according to the first embodiment,
Contact insertion hole 3 of box-shaped shield cover 3
a, the shield cover 3 is attached to the contact terminal 2a by inserting the contact terminal 2a of the connector 2 into the connector cover 2a.
Is simplified, and the ground is taken from the contact terminal 2a, so that the ground connection structure can be simplified.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

In the second embodiment, when a plurality of connectors 12 are mounted on the backboard 11,
All the connector terminals 2 that protrude to the back side of
This is an example in which a shield cover 13 is attached so as to collectively cover a.

The folded portion 13b of the shield cover 13 has a plurality of contact insertion holes 13a although not shown in the drawing because it is the back surface.

The contact insertion holes 13a are formed in a line in each of the left and right folded portions 13b. When the folded portion 13b is formed up and down, the contact insertion holes 13a may be formed up and down, and may be formed up and down and left and right as in the first embodiment.

However, in the case of the second embodiment, since the plurality of connectors 12 are mounted, the shield cover 1
In 3, it is necessary to form a contact insertion hole 12 a corresponding to the outermost contact terminal 12 a of the outermost connector 12 of the plurality of connectors 12.

The outermost contact terminal 12a inserted into the contact insertion hole 12a is used as a ground pin, and the other is used as a signal pin. The ground connection and the like are the same as in the first embodiment.

As described above, according to the second embodiment,
The shield cover 13 can be applied to a case where a plurality of connectors 12 are mounted on the back board 11.
The same effect as that of the embodiment is achieved.

[0034]

As described above, according to the present invention, since the shield cover is mounted by fitting the contact terminals of the connector with the contact insertion holes of the shield cover, the mounting of the shield cover is simplified and the ground connection structure is provided. Can also be easier.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a shield cover according to the first embodiment.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a conventional shield structure.

[Explanation of symbols]

 1,11 Back board 2,12 Connector 2a, 12a Connector terminal 3,13 Shield cover 3a, 13a Contact insertion hole 3b, 13b Folded part

Claims (9)

[Claims] 1. A box formed of a conductive material on a contact terminal of a connector exposed on a back side of a backboard,
A shield structure for a connector, wherein a shield cover having a plurality of contact insertion holes is mounted by inserting the contact terminals into the contact insertion holes. 2. When a plurality of connectors are mounted on the backboard, the shield cover is attached so as to collectively cover contact terminals of the plurality of connectors exposed on the back side of the backboard. The connector shield structure according to claim 1. 3. A shield cover formed of a conductive material in the shape of a box, and having a plurality of contact insertion holes in its folded portion into which contact terminals of a connector are inserted. 4. The shield cover according to claim 3, wherein the metal plate is formed into a box shape by bending. 5. The shield cover according to claim 3, wherein the contact insertion holes are formed vertically or horizontally corresponding to outermost contact terminals of the connector. 6. The shield cover according to claim 5, wherein said contact insertion holes are formed vertically and horizontally. 7. The contact insertion hole according to claim 3, wherein the contact insertion hole is formed corresponding to a further outermost contact terminal of an outermost connector of the plurality of connectors mounted on the backboard. Shield cover. 8. The shield cover according to claim 7, wherein said contact insertion holes are formed vertically or horizontally. 9. The shield cover according to claim 8, wherein said contact insertion holes are formed at the top, bottom, left and right.