JP2503826Y2 - Electronic device shield case - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield case for electronic equipment applied to an RF modulator incorporated in a VTR (video tape recorder), for example.

[0002]

As is well known, RF modulators have a V
It is incorporated in a TR or the like and modulates a reproduced video signal and audio signal into an RF signal of the NTSC system or the like. 5 to 7 are diagrams showing an external configuration of a conventional RF modulator. In these figures, 1 is a substrate to which electronic components are connected, and 2 is a substrate around the substrate 1
This is a metal shield case for covering the antenna. The antenna input terminal 3 and the TV output terminal 4 are attached to the bridge portion 2a on the upper surface of the shield case 2, and the side surface 2b of the shield case 2 is connected to the tuner of the VTR to transmit the RF signal. The phono jack 5 for outputting is attached. In addition, for example, a screw hole 6 is formed between the antenna input terminal 3 and the television output terminal 4 of the bridging portion 2a for incorporating and attaching the RF modulator into the device. Further, a shield plate 7 is attached to the substrate 1 so as to cover the rear surface side of the base end portion of the phono jack 5. The shield plate 7 is provided to prevent the oscillation output of the internal local oscillator or the carrier oscillator from leaking to the outside through the phonojack 5 and causing interference.

[0003]

By the way, with the structure of the shield case 2 of the conventional RF modulator described above, the shield plate 7 is manually attached to the substrate 1 in the process before the substrate 1 is attached to the shield case 2. You have to insert the shield plate 7 in the subsequent process,
There was a problem that the assembly work was extremely complicated.
Moreover, since the shield plate 7 is not connected to the shield case 2, the shield effect is insufficient. Therefore, it is conceivable to form the shield plate 7 integrally with the shield case 2, but this is not realized because it is necessary to form a screw hole 6 for attachment in the bridge portion 2a where the shield plate 7 is located. It was possible.

The present invention has been made in view of the above circumstances, and the shield plate and the mounting piece can be integrally formed from one metal plate forming the frame, thereby reducing the number of parts and assembling. It is an object of the present invention to provide a shield case for an electronic device that reduces the number of working steps.

[0005]

According to the present invention, in a shield case in which the periphery of a single metal plate is bent downward to form a frame, and a bridging portion is provided on the upper surface, a right angle from the bridging portion is provided. It is cut and raised to form a shield plate,
A mounting piece is formed by cutting and raising from a direction opposite to the cutting and raising direction of the shield plate, and the mounting piece is connected to the shield plate at a base portion of the shield plate and bent at a right angle to the shield plate. Is arranged at a position before the shield plate is cut and raised in a state of being turned upside down with respect to the bridging portion, and a hole for attachment is formed in the attachment piece.

[0006]

According to the above-mentioned structure, the shield plate, which has the mounting hole and the mounting hole, is connected to the bridging portion of the shield case, the periphery of which is a frame, and the shield plate is cut and raised. The mounting piece is arranged at the position where the hole is formed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are views showing a configuration of an embodiment of the present invention. As shown in these drawings, the periphery of one metal plate is bent downward to form a frame, and a bridge is provided on the upper surface thereof. Bridging portion 12a of shield case 12 having bridging portion 12a
Is formed with a shield plate 12b cut and raised at right angles from the bridge portion 12a, and the mounting piece 12 cut and raised from a direction opposite to the cut and raised direction of the shield plate 12b.
c is formed. The attachment piece 12c is connected to the shield plate 12b at the base of the shield plate 12b and is bent at a right angle to the shield plate 12b so that the shield plate 12b is turned over with respect to the bridging portion 12a. It is arranged at a position where it is raised and becomes a hole. Further, a screw hole 16 for mounting is formed in this mounting piece 12c.

When the shield case having the above-mentioned structure is manufactured, first, the metal plate is punched into the shape shown in FIG. 3, and then each part is bent in the direction shown by the arrow in FIG. Good. Here, the shield plate 12b is bent 90 degrees in the direction shown by the arrow in FIG. 4 from the expanded state shown in FIG. 3, and the mounting piece 12c is bent 180 degrees from the expanded state. In this way, the bridging portion 12a of the shield case 12 is provided with the attachment piece 12c in which the screw hole 16 is formed and the shield plate 12b, and thereby the shield plate 12b.
The mounting piece 12c is arranged at the position where the hole is formed by cutting and raising. In addition, the screw hole 1 provided in the mounting piece 12c
Instead of 6, a burrow hole for mounting and positioning may be formed.

[0009]

As described above, according to the present invention, the attachment piece having the screw hole and the shield plate are continuously connected to the bridging portion of the metal plate having the frame as the periphery. Since the shield plate and the mounting piece can be integrally formed with the frame body, the number of parts can be reduced and the number of assembling steps can be reduced as compared with the conventional case where the shield plate is a separate part. In addition to this, since the shield plate is integrated with the shield case, the shield effect is improved compared to the conventional one in which the shield plate was grounded on the substrate, Unwanted high frequency leaks from the input / output terminals near the shield plate can be suppressed to a low level.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of an embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of an embodiment of the present invention.

FIG. 3 is a development view showing a manufacturing process of an embodiment of the present invention.

FIG. 4 is a perspective view showing a manufacturing process of an embodiment of the present invention.

FIG. 5 is a perspective view showing an external configuration of a conventional RF converter.

FIG. 6 is a cross-sectional view showing a configuration of a conventional RF converter.

FIG. 7 is a side view showing the configuration of a conventional RF converter.

[Explanation of reference numerals] 12 shield case 12a bridge part 12b shield plate 12c mounting piece 16 screw hole

Claims (1)

(57) [Scope of utility model registration request] 1. A shield case in which the periphery of one metal plate is bent downward to form a frame body and a bridge portion is provided on the upper surface, and the shield plate is cut and raised from the bridge portion at a right angle. At the same time, the mounting piece is formed by cutting and raising from a direction opposite to the cutting and raising direction of the shield plate,
The attachment piece is connected to the shield plate at the base of the shield plate, and is bent at a right angle to the shield plate so that the shield plate is turned upside down with respect to the bridging portion before the shield plate is cut and raised. A shield case for an electronic device, wherein the attachment piece is provided with a hole for attachment.