JPH0567087U - Shield structure - Google Patents

Abstract

(57) [Abstract] [Purpose] A three-point structure consisting of a resin cabinet, a metal cover, and a metal bottom plate prevents external noise from affecting electrical components inside the equipment. A metal cover 1 having an inverted U-shaped cross section and having tongues 1c, 1c bent from each other at approximately 90 ° from the edges of the left and right side faces 1b, 1b, a bottom face 2a and left and right side faces 2b,
A U-shaped resin cabinet 2 composed of 2b and a metal bottom plate 3 covering the bottom surface 2a, and elastic pieces 3b, 3b bent at obtuse angles from the left and right edges of the bottom plate 3 are provided.
By fixing the bottom plate 3 to the cabinet 2, the elastic piece 3b elastically contacts the tongue piece 1c.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shield structure for preventing external noises in electronic devices and the like.

[0002]

[Prior Art]

 When a device consisting of a resin cabinet and a metal cover and bottom plate is shielded, separate conductive parts that contact both are generally used to obtain electrical continuity between the cover and bottom plate. . See, for example, JP-A-3-22590 (H 05K 5/02).

[0003]

[Problems to be solved by the device]

 With the above configuration, the number of parts and the number of assembly work steps increase, which is one of the causes of cost burden.

[0004]

[Means for Solving the Problems]

 The present invention has a U-shaped resin cover having a reverse U-shaped cross section and a metal cover having tongues bent from each other by approximately 90 ° from the edges of the left and right side surfaces. As a three-point configuration of a cabinet and a metal bottom plate that covers the bottom surface, elastic pieces bent at obtuse angles are provided from the left and right edges of the bottom plate, and the elastic pieces are fixed to the cabinet by the elastic pieces. Make elastic contact with the tongue.

[0005]

[Action]

 By assembling the bottom plate and the cover in the cabinet and fixing the bottom plate with screws, the cover and the bottom plate elastically contact with each other, and the electric components in the cabinet are electromagnetically shielded from external noise.

[0006]

FIG. 1 is an assembled sectional view of the present invention, and FIG. 2 is an exploded perspective view. In the figure, reference numeral 1 is a metal cover, and the cover 1 includes a top surface 1a, left and right side surfaces 1b, 1b, and tongue pieces 1c, 1c bent through approximately 90 ° from the side surfaces 1b, 1b and a through hole 1d. , 1d, ... Are integrally formed. A resin cabinet 2 has a bottom surface 2a and left and right side surfaces 2b, 2b, and is formed in a box shape. 2c, 2c ... And 2d, 2d ... Are through holes. Reference numeral 3 denotes a metal bottom plate, on which elastic pieces 3b, 3b bent at an obtuse angle from the edge of the bottom surface 3a are integrally formed. 3c and 3c are through holes. 4 is a screw.

As shown in FIG. 1, when the cabinet 1 is covered with the cover 1 and the bottom plate 3 is fitted and then the screw 4 is tightened, the elastic piece 3b moves from the position indicated by the dashed-dotted line (3b ') to the position indicated by the solid line. It bends and elastically comes into line contact with the open end of the cover 1. Although the tongue piece 1c and the elastic piece 3b are provided over the entire side edge in the figure, the tongue piece 1c and the elastic piece 3b may be partially provided at positions where they face each other.

[0008]

[Effect of the device]

 INDUSTRIAL APPLICABILITY The present invention is effective because it can prevent external noise from entering electric parts in the cabinet with a simple structure including a cover, a cabinet, and a bottom plate.

[Brief description of drawings]

FIG. 1 is an assembled sectional view of the present invention.

FIG. 2 is an exploded perspective view of the present invention.

[Explanation of symbols]

 1 cover 1c tongue piece 2 cabinet 3 bottom plate 3b elastic piece

Claims (1)

[Scope of utility model registration request] 1. A metal cover provided with tongues which are bent at approximately 90 ° from the edges of the left and right side faces having an inverted U-shaped cross section, and a U-shaped resin made of a bottom face and left and right side faces. A cabinet and a metal bottom plate that covers the bottom surface, elastic pieces bent at obtuse angles from the left and right edges of the bottom plate are provided, and the elastic pieces are attached to the tongue piece by fixing the bottom plate to the cabinet. A shield structure characterized by elastic contact.