JPH08306403A - Connecting device of electronic equipment - Google Patents

Abstract

PURPOSE: To provide a connecting device of an electronic equipment which reliably and electrically connects mutual conductive parts arranged in an electronic equipment member without deforming the electronic equipment member. CONSTITUTION: A connecting device of an electronic equipment is composed of a casing 7 which has an aluminium plate 9 and whose strength is large, a printed circuit board 8 whose strength is small and a metallic coil spring 10 composed of an elastic body holding part 7a, a first elastic part 10a having large elastic stress and a second elastic part 10b having small elastic stress, and the first elastic part 10a is inserted and held between the casing 7 and the elastic body holding part 7a. The printed circuit board 8 and an end part of the second elastic part 10b are contacted with each other, and gold plating processing is performed on the contact part of the printed circuit board 8. In this constitution, the aluminium plate 9 and gold plating 11 can be reliably and electrically connected to each other without deforming the casing 7 and the printed circuit board 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electrical connection of electronic equipment members having a conductive portion, such as a metal plate provided on a printed circuit board or a casing.

[0002]

2. Description of the Related Art In recent years, a method of electrically connecting an electronic device member having a conductive portion such as a metal plate provided on a printed circuit board or a housing by using a metal coil spring or the like has been widely used. An example of the electrical connection between the conventionally used printed circuit board and the metal plate provided on the housing will be described below with reference to FIG.

FIG. 3 is a sectional view of a connecting portion between a conventionally used printed circuit board and a metal plate adhered to a housing.
As shown in FIG. 3, the upper housing 1 is provided with a through hole 1a, and a metal plate 2 is adhesively fixed so as to cover the through hole 1a. Printed circuit board 3 having copper foil portion 3a in lower housing 4
Is placed, and the upper casing 1 and the lower casing 4 are engaged with each other. A metal coil spring 5 is inserted into the through hole 1a, and one end of the metal coil spring 5 is in contact with the metal plate 2 and the other end is in contact with the copper foil portion 3a.

With the above structure, the metal plate 2 and the copper foil portion 3a are electrically connected by the elastic stress of the metal coil spring 5.

[0005]

However, in the above-mentioned conventional connecting device, the elastic stress of the metal coil spring 5 is directly applied to the printed circuit board and the housing, and the printed board and the housing are made lighter and thinner. There has been a problem that the substrate and the housing are deformed. Further, when the elastic stress of the metal coil spring is reduced in order to prevent deformation, there is a problem that a contact failure occurs between the metal foil bonded to the copper foil portion of the printed board and the housing and the metal coil spring.

The present invention solves the above problems, and provides a connecting device for an electronic device that surely electrically connects conductive portions provided on the electronic device member without deforming the electronic device member. Has an aim.

[0007]

In order to achieve the above object, the present invention provides two electronic equipment members having a conductive portion and a conductive elastic body having at least two types of elastic portions having different elastic stresses. An elastic body holding portion, the two electronic device members include one electronic device member having high strength and the other electronic device member having low strength, and the conductive elastic body has large elastic stress. And a second elastic portion having a small elastic stress, and the first elastic portion is provided between the one electronic device member having the large strength and the elastic body holding portion. Of the other electronic device member having a small strength by contacting the other electronic device member having a small strength with the end of the second elastic portion having the small elastic stress. The contact portion is gold-plated.

[0008]

According to the present invention, since the first elastic portion having a large elastic stress is inserted between the one electronic device member having a large strength and the elastic body holding portion according to the above-described structure, the elastic stress is increased. As a result, the conductive elastic body can be reliably held, and the one electronic device member having high strength and the end portion of the first elastic portion having large elastic stress can be surely brought into contact with each other. Further, since the one electronic device member has high strength, it is possible to prevent the deformation of the one electronic device member. Further, since the other electronic device member having low strength is brought into contact with the end of the second elastic portion having small elastic stress, the other electronic device member having low strength has only small elastic stress. It is possible to prevent the deformation of the other electronic device member having a small strength that does not work, and the contact portion of the other electronic device member having a small strength is subjected to the gold plating treatment. The contact resistance of the other electronic device member whose strength is small due to the small elastic stress can be reliably contacted with the end of the second elastic portion having the small elastic stress of the conductive elastic body. Can be made.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a connecting portion between a printed circuit board and a metal plate adhered to a housing according to an embodiment of the present invention, and FIG. 2 is a copper foil portion on a printed circuit board according to an embodiment of the present invention which is plated with gold. FIG. As shown in FIG. 1 and FIG. 3, an elastic body holding portion 7a is integrally formed on the housing 7 which is one of the electronic device members having a high strength, and the aluminum body is formed so as to cover the elastic body holding portion 7a. The plate 9 is adhesively fixed. Equipment mechanism 6
A printed circuit board 8 which is the other electronic device member having low strength is placed on the printed circuit board 8. The copper foil portion 8a on the printed circuit board 8 is plated with gold 11, and the housing 7 and the device mechanism 6 are provided. Are engaged with. The aluminum plate 9 provided on the housing 7 and the gold plating 11 applied to the copper foil portion 8a on the printed circuit board 8 are the metal coil spring 1 which is a conductive elastic body.
It is a structure to be electrically connected with 0. Metal coil spring 10
Is integrally formed while having two different types of elastic portions, a first elastic portion 10a having a large elastic stress and a second elastic portion 10b having a small elastic stress.

Here, the metal coil spring 10 has a first elastic portion 10a having a large elastic stress, which is inserted between the elastic body holding portion 7a and the aluminum plate 9 provided on the housing 7 so that the elastic stress is increased. The aluminum plate 9 provided on the housing 7 and the end of the first elastic portion 10a come into contact with each other. In addition, the second elastic portion 10 having a small elastic stress
b is a copper foil portion 8a on the printed circuit board 8 due to its elastic stress.
It contacts the gold plating 11 applied to the.

At this time, since the first elastic portion 10a has a large elastic stress, the elastic stress acts on the elastic body holding portion 7a and the aluminum plate 9 to securely hold the metal coil spring 10. Along with the aluminum plate 9 and the first elastic portion 1
0a can be surely brought into contact with the end of the casing 0a, and the elastic body holding portion 7a and the casing 7 provided with the aluminum plate 9 have high strength, so that the casing 7 can be prevented from being deformed. it can. Further, since only a small elastic stress of the second elastic portion 10b acts on the printed circuit board 8, it is possible to prevent the printed circuit board 8 from being deformed, and the copper foil portion 8a on the printed circuit board 8 is plated with gold 11. Since it is applied, the gold plating 11 can be surely brought into contact with a low contact resistance even with a small elastic stress.

As described above, according to the electronic device connecting apparatus of the embodiment of the present invention, the aluminum plate 9, the case 7, the printed circuit board 8 are provided.
Make sure aluminum plate 9 and gold plating 11 without deforming
And can be electrically connected. In addition,
In this embodiment, the metal coil spring 10 is used as the conductive elastic body, but it is possible to select a conductive elastic body that meets the conditions, taking into consideration strength, conductivity, elastic stress and the like. Further, in the present embodiment, the aluminum plate 9 is used as the conductive portion provided on one of the electronic device members having high strength, but this is selected in consideration of strength, conductivity and the like. It is possible.

[0013]

As described above, according to the present invention, two electronic device members having a conductive portion, a conductive elastic body having at least two types of elastic portions having different elastic stresses, and an elastic body holding portion are provided. The two electronic device members are composed of one electronic device member having a high strength and the other electronic device member having a low strength, and the conductive elastic body has the first elasticity having a large elastic stress. Part and a second elastic part having a small elastic stress, and the first elastic part is inserted between the one electronic device member having a large strength and the elastic body holding part so that the strength is small. Since the other electronic device member is brought into contact with the end of the second elastic part having a small elastic stress, the contact part of the other electronic device member having a small strength is gold-plated. , Securely mounted on the electronic device member without deforming the electronic device member Between conductive portion it is capable of providing a connection device of an electronic device electrically connected.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a connecting portion between a printed circuit board and a metal plate adhered to a housing according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion where a copper foil portion on a printed circuit board is plated with gold according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a connection portion between a conventionally used printed circuit board and a metal plate adhered to a housing.

[Explanation of symbols]

 7 case 7a elastic body holding part 8 printed circuit board 8a copper foil part 9 aluminum plate 10 metal coil spring 10a first elastic part 10b second elastic part 11 gold plating

Claims (3)

[Claims] 1. An electronic device member having a conductive portion,
It is composed of a conductive elastic body having at least two types of elastic portions having different elastic stresses, and an elastic body holding portion, and the two electronic device members have one of high strength and the other of which has low strength. The electronic device member, the conductive elastic body includes a first elastic portion having a large elastic stress and a second elastic portion having a small elastic stress. The first elastic part is inserted between the device member and the elastic body holding part, and the other electronic device member having the small strength and the end part of the second elastic part having the small elastic stress. And a contact portion of the other electronic device member having a small strength is subjected to a gold plating treatment. 2. The connection device for electronic equipment according to claim 1, wherein the elastic body holding portion is arranged on one of the electronic equipment members having high strength. 3. The electronic device member having a low strength is formed of a printed circuit board.
The connection device for the electronic device according to [1].