JP2544285Y2 - Electronic equipment shield device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a disk player, and more particularly to a shield device.

[0002]

2. Description of the Related Art Disk players that read signals from a disk on which concavities and convexities corresponding to digital signals are engraved by using an optical pickup have become widespread. However, since such disk players have an oscillation circuit,
There is a problem that a noise signal that adversely affects other devices is output or a minute signal flows, so that the device is adversely affected by radio waves arriving from outside. Therefore, such a disk player incorporates a shielding device for shielding the electric circuit section in order to solve the above problem.

[0003]

DISCLOSURE OF THE INVENTION Among disk players, there is a portable disk player for outdoor use, and such a portable disk player is used in a portable manner, so that it is downsized, especially thin. Is required. The present invention seeks to provide a shield device suitable for reducing the thickness of such a device.

[0004]

SUMMARY OF THE INVENTION A shield device according to the present invention is formed on a printed wiring board housed in a container formed by a lower cabinet and an upper cabinet made of a conductor, and formed on the printed wiring board. A coil spring in which the winding part is inserted into the mounting part, the fixed end is soldered to the ground pattern, and the free end part is wound is provided. The free end of the coil spring is pressed against the free end of the coil spring so that the free end contacts the lower cabinet.

[0005]

According to the present invention, there is provided a coil spring in which a winding portion is inserted into a mounting portion formed on a printed wiring board, a fixed end is soldered to a ground pattern, and a free end is wound. And the coil springs electrically connect the upper and lower cabinets to the ground pattern of the printed wiring board.

[0006]

FIG. 1 is a sectional view showing a main part of a disc player in which a shield device of the present invention is incorporated, FIG. 2 is a sectional view of a main part before assembling, and FIG. 3 is a perspective view of the main part.

In FIG. 3, reference numeral 1 denotes a printed wiring board in which an electric circuit is incorporated, on which components such as a power jack 2 are mounted and fixed and a ground pattern 3 is wired. Reference numeral 4 denotes a coil spring in which the winding part 5 is fitted into the mounting part 6 formed on the printed wiring board 1 and the fixed end 7 is fixed to the ground pattern 3 by soldering. The free end 8 is wound around the body. Reference numerals 6a and 6b denote protrusions provided at the tip of the mounting portion 6 formed on the printed wiring board 1, and have a function of preventing deformation of the coil spring 4 .

Reference numeral 9 denotes a lower cabinet which forms the main body of the disc player. The lower cabinet 9 is formed of a conductor such as aluminum and has a recess 9a for accommodating the head 10a of the screw 10 and a screw hole 9b. I have. Reference numeral 11 denotes a support member fixed to the lower cabinet 9 and supporting the printed wiring board 1 and a drive mechanism of the disk.
A boss 13 provided with the second boss 13 is formed.

Reference numeral 14 denotes a decorative plate formed of a synthetic resin and provided with a disk mounting portion 15, and a boss having a screw hole 16 at a position corresponding to the boss 13 of the support member 11. 17 are formed.

Reference numeral 18 denotes a support plate which is attached and fixed to the decorative plate 14 with screws 19 and is formed of a conductive material.
The free end portion 8 of the coil spring 4 when the
Is provided with a pressing portion 18a that comes into contact with.

Reference numeral 20 denotes a rotating plate which is supported by the support plate 18 and is formed of a conductive material.
2 and a disk mounting portion 1 attached to and fixed to the rotating plate 20 and provided on the decorative plate 14
5, the support plate 18 of the rotating plate 20
The disk is mounted so as to be rotatable between an open position and a closed position where a disk is attached and detached by a rotational displacement operation with respect to the disk. The lid 21 is formed of a conductor such as aluminum.

As described above, the shield device according to the present invention is configured. Next, the assembly will be described. As shown in FIG. 3, after the winding part 5 of the coil spring 4 is fitted into the mounting part 6 formed on the printed wiring board 1, the fixed end 7 provided on the coil spring 4 is connected to the printed wiring board. 1 is soldered to the ground pattern 3 wired. The soldering of the fixed end 7 to the ground pattern 3 and the fitting of the winding part 5 to the mounting part 6 completes the operation of mounting the coil spring 4 on the printed wiring board 1.

The printed circuit board 1 assembled in this manner is supported by the support member 11 fixed to the lower cabinet 9.
2, the free end portion 8 of the coil spring 4 is separated from the lower cabinet 9 as shown in FIG. FIG. 2 shows a state in which the support plate 18 is fixed to the decorative plate 14 and the lid 21 is attached to the turning plate 20 rotatably supported by the supporting plate 18 by screws 22.

When the decorative board 14 or the like is moved downward from the state shown in FIG. 2, the state shown in FIG. 1 is obtained. In this state, the screws 10 are formed in the lower cabinet 9 from below. When the screw is inserted into the screw hole 9b and tightened, the screw 1
0 is the screw hole 1 of the boss 17 through the screw hole 12 of the boss 13
6, the decorative plate 14 and the lid 21 can be combined with the lower cabinet 9.

The main body of the disc player can be assembled in this manner.
When it is moved downward from the state shown in (1), the pressing portion 18a provided on the support plate 18 comes into contact with the free end portion 8 of the coil spring 4 . As a result, the free end 8 is displaced against the elastic force of the coil spring 4 and comes into contact with the lower cabinet 9 as shown in FIG. And
In such a state, the free end 8 of the coil spring 4
Indicates that the lower cabinet 9
And the free end 8 is in contact with the support plate 18 in a pressurized state. Therefore, the contact relationship between the coil spring 4 and the lower cabinet 9 and the support plate 18 can be ensured.

In the state shown in FIG. 1, the lower cabinet 9 is electrically connected to the ground pattern 3 of the printed wiring board 1 via the coil spring 4 . Also,
Lid 21 to be the upper cabinet of the disc player
Is in a state of being electrically connected to the ground pattern 3 of the printed wiring board 1 via the screw 22, the rotating plate 20, the support plate 18, and the coil spring 4 .

When the main body of the disc player is in the assembled state, the lower cabinet 9 and the lid 21 formed of a conductor are electrically connected to the ground pattern 3 of the printed wiring board 1. Therefore, the lower cabinet 9 and the lid 21 function as a shield member, and the electric circuit incorporated in the printed wiring board 1 is shielded.

In this embodiment, the disc player in which the lid 21 is provided as an upper cabinet has been described. However, when the present invention is applied to an electronic device having no lid, the support plate 18 is pressed against the upper cabinet. A pressing portion is provided instead of the portion 18a. Also, the case where the lower cabinet 9 and the lid 21 are formed of a conductor such as aluminum has been described. However, when the cabinet or the like is formed of a synthetic resin, by providing a shielding material on the inner surface, The present invention can be configured.

[0019]

According to the shield device of the present invention, the winding portion is inserted into the mounting portion formed on the printed wiring board, the fixed end is soldered to the ground pattern of the printed wiring board, and the free end is provided. The coil spring is provided with a coiled part, and the upper and lower cabinets are electrically connected to the ground pattern by the displacement of the free end, so that the displacement force of the free end is less than that of the contact operation. Therefore, the present invention can maintain a good electrical contact relationship, and the present invention is most suitable as a shield device for electronic equipment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of a disc player in which a shield device of the present invention is incorporated.

FIG. 2 is a sectional view of a main part showing a state before assembling the shield device of the present invention.

FIG. 3 is a perspective view showing a main part of the shield device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printed wiring board 3 Grounding pattern 4 Coil spring 5 Winding part 6 Attachment part 7 Fixed end 8 Free end 9 Lower cabinet 14 Decorative plate 18 Support plate 20 Rotating plate 21 Lid

Claims (1)

(57) [Scope of request for utility model registration] 1. An electronic device in which a printed wiring board in which an electric circuit is incorporated is housed in a container formed by a lower cabinet and an upper cabinet made of a conductor, and is formed on the printed wiring board. A coil spring having a winding part fitted in the mounting part, a fixed end soldered to a ground pattern on the printed wiring board, and a free end wound around the lower part; And when the conductive pressing portion provided on the upper cabinet is pressed against the free end of the coil spring, the free end is brought into contact with the lower cabinet by displacement of the free end. A shield device for electronic equipment, characterized in that: