JPH0327338Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention consists of an electronic device housing case and a package (hereinafter referred to as
This relates to the ground connection structure between

Conventionally, this type of ground connection structure was made through a connector on the back of the case and a connector mounted on the PKG.

However, as the frequency band of signals within electronic equipment becomes higher, there is a drawback that grounding capacity becomes insufficient. Another disadvantage is that the PKG circuit may be damaged by a rush current when inserting and removing the PKG.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and provide a ground connection structure that has a simple structure, has a large ground capacity, and can prevent rush currents.

The ground connection structure of the present invention includes a shield body having a first connector, a ground connection piece having a plate spring portion circumscribed on a cylindrical elastic body, and a second connector that can be mated with the first connector. and a package with the ground connection piece fixed to the component mounting surface of the package such that a part of the ground connection piece protrudes outside the component mounting surface of the package when no external pressure is applied to the ground connection piece. is inserted into the housing and the second connector is not engaged with the first connector, external pressure is applied to the ground connection piece by the inner wall of the housing so that the leaf spring portion It is characterized by being configured so as to come into contact with the inner wall.

Next, a detailed explanation will be given with reference to the drawings.

FIG. 1 shows a conventional example, in which a PKG 2 is plugged into a housing 1. Through the fitting part between the PKG side connector 3 and the housing side connector 4,
A ground connection is made between the housing 1 and the PKG 2. As described above, the contact area of the fitting portion is narrow and the ground capacity is insufficient, and a sudden current flows during insertion and removal, which may cause a circuit failure.

2, 3 and 4a and 4b show an embodiment of the present invention. Attach the ground connection piece 7 to the end of the component mounting surface 6 on the PKG 5 side using the tongue piece 9 of the leaf spring part 8 so that a part of it protrudes from the PKG outline.
It is soldered to PKG5. When the PKG 5 is inserted into the casing 1 along the casing 1 side sheet metal guide 10, the leaf spring portion 8 of the ground connection piece 7 comes into contact with the casing 1 side sheet metal guide 10 and is deformed. However, when the leaf spring part 8 pushes against the elastic rubber 11, it receives a repulsive force and always comes into contact with the sheet metal guide 10 on the side of the housing 1, so the ground connection capacity is large, and the fitting of the connectors 3 and 4 is By bringing the connectors into contact before mating, it has the function of preventing a rush current when the connectors 3 and 4 are mated.

Instead of rubber, other elastic plastics or the like may be used as the elastic material of the ground connection piece.

According to the present invention, the structure is simple and the grounding capacity is large, so there is no risk of insufficient grounding capacity even when the frequency band becomes high, and the mounting position of the grounding connection piece on the PKG is set between the PKG side connector and the casing. If it is determined that the body-side connector comes into contact with the housing sheet metal guide earlier than the body-side connector comes into contact, it is possible to prevent a rush current when the connector is inserted or removed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is a perspective view showing the contact state of the ground connection piece in Fig. 2, and Fig. 4 a. ，
b is an exploded perspective view showing the ground connection piece in FIG. 2; 1...Housing, 2...PKG, 3...PKG side connector, 4...Housing side connector, 5...PKG, 6
... Component mounting surface, 7 ... Earth connection piece, 8 ... Leaf spring part, 9 ... Tongue piece, 10 ... Sheet metal guide, 11
...Tubular rubber.

Claims (1)

[Scope of utility model registration request] The package includes a housing having a first connector, a grounding connection piece having a plate spring portion circumscribed on a cylindrical elastic body, and a package having a second connector that can be mated with the first connector, When no external pressure is applied to the earthing connection piece, the earthing connection piece is fixed to the component mounting surface of the package so that a part of the earthing connection piece protrudes outside the component mounting surface of the package, and the package is inserted into the housing. When the second connector is not engaged with the first connector, an external pressure is applied to the ground connection piece by the inner wall of the enclosure so that the leaf spring portion comes into contact with the inner wall. A ground connection structure characterized by: