JPS59181477A - Method of connecting shield cord - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention relates to an improvement in a method for connecting shielded cords.

(b) Background of the Technology Electronic devices that require electrostatic shielding and electromagnetic shielding are housed in metal casings and hermetically sealed. In order to prevent malfunctions caused by electrostatic noise caused by static electricity caused by the human body touching insulators such as connectors, and electromagnetic induction noise caused by electromagnetic induction from the surroundings of electronic devices, power lines and signals connected to these devices are Shielded cord must be used for the wire.

(C) Prior Art and Problems FIG. 1 is a plan view showing a conventional shield cord connection method.

In the figure, a printed board 2 constituting an electronic device is housed in a metal housing 1. As shown in FIG. A printed board connector 3 is attached to the printed board 2, and the end surface of the printed board connector 3 protrudes to the outside of the metal casing 1 from a hole in a side plate of the metal casing. At the terminal portion of the shielded cord 4, the outer sheath and the ground conductor 5 made of copper wire braid are peeled off to expose the signal wire and the power wire, which are internal conductors, and are connected to the contacts of the connector 6, respectively. The entire outer surface of the connector housing of the connector 6 is formed with a metal layer, in which case nickel is vapor-deposited. Such a connector 6 is attached to the terminal of the shielded cord 4. A metal fitting 8 made of a thin Z-shaped plate is attached to the edge of the hole in the metal housing 1 so as to come into contact with both ends of the printed board connector 3.

The connector 6 is inserted into the printed board connector 3 with the end face facing the fixing screw 7 in row contact with both ends of the end face of the printed board connector 3 via the metal fittings 8, and by screwing the fixing screw 7, the connector 6 The connector housing of is fixed to the housing of the printed board connector 3. Further, the ground conductor 5 and the metal casing I are connected by a metal wire 9.

In this way, shield the connector housing and fix the screw 7. The metal casing 1 is grounded through the metal fitting 8 to prevent static electricity from being generated in the connector housing of the connector 6, and the ground conductor of the shield cord 4 is grounded to the metal casing via a metal wire 9. Therefore, there is no risk of electrostatic noise or electromagnetic induction noise occurring in electronic devices.

However, it is necessary to form a metal layer on the outer peripheral surface of the connector housing for shielding, to attach a metal fitting 8, and to connect a metal wire 9, which is a troublesome method for connecting the shielded cord.

Also, if you use a metal connector specifically for shielded cords instead of using the general-purpose molded connectors mentioned above,
Although the connector insertion process is easy, there is a problem in that metal connectors are expensive.

(d) Object of the Invention An object of the present invention is to provide a method for connecting shielded cords that is low in cost and has good workability, which eliminates the above-mentioned conventional problems.

(e) Structure of the Invention In order to achieve this object, the present invention provides a structure in which the inner surface is in close contact with the outer surface of the connector housing attached to the terminal of the shielded cord, or the terminal board to which the shielded cord is connected. A box-shaped metal case with a bottom that is in close contact with the outer surface has a bottom that is in close contact with the ground conductor of the shielded cord and is fixed to the terminal of the shielded cord, and a leaf spring with a claw at the tip is attached to the metal case. The shield cord has elasticity in a direction perpendicular to the axis of the metal case, and is attached to the outside of the opposing side surfaces of the metal case, with the tip facing toward the opening surface and the claws facing backwards. The connection is made by locking the acid mold into a hole in the side plate of a metal casing of an electronic device or the like provided at the part to be connected, by the elasticity of the acid root spring.

<r> Embodiments of the Invention The present invention will be described in detail below with reference to illustrated embodiments.

FIG. 2 is a side sectional view showing one embodiment of the present invention, and FIG. 3 is a side sectional view showing the connection to a terminal board.

In FIG. 2, the metal case 11 is in the shape of a box with a bottom and has an inner surface that is in close contact with the outer surface of the connector housing of the connector 10 attached to the terminal of the shielded cord 4. A part of the bottom of the metal case 11 is curved so as to extend in the axial direction of the shielded cord 4 and grip the ground conductor 5 from which the outer sheath of the shielded cord 4 has been peeled off. Holding metal fittings 12 are attached to this portion so as to face each other with the ground conductor 5 in between, and are tightened by machine screws 13 so as to be tightly attached to the ground conductor 5 and fixed to the end of the shielded cord 4. Furthermore, shield yaw 1
4. Internal conductors (not shown) are connected to contacts of the connector 10, respectively.

A pair of leaf springs 14 having claws 14a at their tips have elasticity in a direction perpendicular to the axis of the metal case 11, and are attached to the metal case 11 so that the claws 14a are on the opening side of the connector 1o. They are attached to the outside of the opposing sides, facing each other, and the bases are spot welded.

The metal case constructed in this way] 1 and the connector 10
The leaf spring 14 facing the printed board connector 3 when inserted into the printed board connector 3
While pressing the connectors inwardly, the connectors are inserted into the hole 1a from which the insertion end surface of the printed board connector 3 protrudes in the side plate of the metal casing 1, which is provided at the portion where the shield cord 4 is to be connected. The metal case 11 is fixed to the metal housing 1 by locking the pawl 14a to the hole side edge 1b which is folded back inside the hole 1a by the elasticity of the leaf spring 14 and bringing it into close contact.

In this way, the connector housing of the connector 10 is covered by the metal case 11 and is electrostatically shielded so that it cannot be touched by humans. Since it is electrically connected to the metal casing 1 via the leaf spring 14 and grounded, no noise is generated due to electromagnetic induction. .

In FIG. 3, the metal case 11 attached to the shield cord 4 as in FIG. The claw 14a is engaged with the side edge of the hole.

Therefore, the exposed internal conductor of the shield cord 4 is connected to the terminal plate 15 inside the metal case 11, and the electric VASF
There is no risk of noise generation due to j-conduction.

(g) Detailed Description of the Invention As described above, the present invention is a method in which a metal case having a pair of leaf springs attached thereto is attached to the terminal of the shield cord, and the elasticity of the leaf springs causes the metal case to be attached to the metal case. It can be applied to both connectors and terminal boards, and it is easy to attach the shielded cord to electronic equipment, etc., and it is low cost, and does not generate electrostatic noise or electromagnetic induction noise in electronic equipment, etc. This is a method of connecting the shield cord that is effective for practical purposes such as ((()).

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional method of connecting a shielded cord, Fig. 2 is a side sectional view showing an embodiment of the present invention, and Fig. 3 is a side sectional view showing a connection to a terminal board. . In the figure, 1 is a metal casing, 2 is a printed board, 3 is a printed board connector, 4 is a shielded cord, 5 is a ground conductor, 6.
10 is a connector, 9 is a metal wire, 1] is a gold case, 12
14 is a leaf spring, 1 and 4a are claws, and 15 is a terminal plate. Agent: Hiroshito Matsuoka, Patent Attorney: ;, -,,,, g.
1 inch 2nd figure

Claims (1)

[Claims] A box-shaped metal case with a bottom, the inner surface of which is in close contact with the outer surface of a connector housing attached to the terminal of the shielded cord, or the outer surface of a terminal board to which the shielded cord is connected, has a bottom that is connected to the shielded cord. A pair of leaf springs, which are fixed to the ends of the shielded cord in close contact with the ground conductor of the metal case and have claws at their tips, have elasticity in a direction perpendicular to the axis of the metal case, and are attached to the outside of the opposite side surfaces of the metal case so that the acid type faces the opening side and the acid type faces the back, and is attached to the outside of the opposite side surfaces of the metal case such that the shield cord is connected to the metal case of the electronic device etc. A method for connecting a shield cord, characterized by connecting an acid mold to a hole in a side plate by locking the acid type with the elasticity of an acid root spring.