JP3095551U - Disk device shield structure - Google Patents

Abstract

(57) [Problem] To reduce the radiation of unnecessary electromagnetic waves from a disk device having a front panel made of resin and having a front loading type disk drive device mounted thereon, and to prevent electromagnetic wave interference to other electronic devices. Be able to do it. SOLUTION: A cross section is formed in a disk drive device mounted in a center portion of a lower case in a disk device housing including a resin front panel, a metal rear panel, a metal upper case, and a metal lower case. Attach a substantially U-shaped metal clamp holder, attach one end of the leaf spring to the clamp holder, and project the other end from the clamp holder,
The other end of the protruding leaf spring is urged by the mounting of the upper case, so that the clamp holder and the upper case are electrically connected.

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD The present invention relates to a DVD (Digital Versati). Le Disk) and other disc devices for reproducing optical discs, especially discs A system designed to reduce the emission of unnecessary electromagnetic waves from the device and prevent electromagnetic interference. The shield structure of the device.

[0002]

2. Description of the Related Art In recent years, with the miniaturization of disk devices, power supply circuits for disk devices Switching power supply circuits have come to be installed in. Switching power supply circuit Is a large transformer with better power conversion efficiency than the one using the conventional transformer. Therefore, the power supply circuit can be downsized. But switching The power supply circuit has a frequency higher than the commercial power supply frequency of 50 Hz / 60 Hz, for example, 10 Hz. By switching the rectified direct current from the commercial power supply at a frequency of about 0 kHz, Is designed to obtain the direct current of, and its switching frequency and its harmonics are unnecessary. Controls the disk device equipped with a microcomputer because it is radiated to the outside as an electromagnetic wave The circuit prevents malfunction due to unnecessary electromagnetic waves radiated from the switching power supply. Therefore, it is a separate board from the switching power supply circuit, The power source circuit is a disk drive device placed in the center of the disk device. It is placed on both sides and connected by a connecting cable. Also, run the microcomputer The system clock to be generated has a high frequency and is a 27 MHz rectangular wave signal. The operating frequency of the decoder that decodes image / audio signals is also high, and it is a rectangle of about 120 MHz. Since it is a wave signal, the frequency of the system clock and its harmonics, the operation of the decoder The frequency and its harmonics sneak into the connection cable with the switching power supply circuit and Unwanted electromagnetic waves are radiated from the continuous cable. The housing of the disk device is made of metal However, since the front panel of the disk device is made of resin, it is unnecessary from inside the disk device. Electromagnetic waves are radiated from the front panel side to the outside, There was a problem that electromagnetic interference occurred in the electronic device.

A conventional technology is a portable CD (Compact Disk). ) The upper and lower cases of the player's outer case also serve as heat sinks and shields. As a metal, the outer case, which consists of a metal upper case and a metal lower case, There were those that were designed to house a disk drive device, control circuit, etc. (See Reference 1).

In addition, a clan for chucking a disc with a turntable. The frame located above the top of the turntable is made of magnetic material and Provide the material part and the magnet inside the clamp to generate a magnetic field to clamp the clamp. Some were designed to be placed on the surface of the projection of the ram or turntable ( See, for example, Patent Document 2).

[0005]

[Patent Document 1] Japanese Patent Laid-Open No. 6-28280

[Patent Document 2] Japanese Patent Laid-Open No. 2001-283492

[0006]

[Problems to be Solved by the Invention] However, among those described in the prior art, In the former case, the upper case and the lower case of the exterior case of the portable CD player Is a metal that also serves as a heat sink and shield. It is possible to store the disk drive device, control circuit, etc. in an outer case consisting of Although it was possible, the front panel was made of resin and the optical disc was not inserted from the front panel side. Front loading disk drive device It cannot be applied to the built-in disk device and can solve the above problems. I couldn't.

In the latter case, the disk is chucked with the turntable. The frame located above the king clamp is made of magnetic material and The magnetic material is provided on the convex portion of the bull, and the magnet is provided inside the clamp to generate a magnetic field. And place the clamp on the convex surface of the frame or turntable. However, there is no need to radiate from the disk device due to the frame made of magnetic material. There is no disclosure of reducing electromagnetic waves to prevent electromagnetic interference.

The present invention has been made in view of the above problems of the prior art. The purpose is to use a front loading disc drive. Unwanted electromagnetic waves from a disk device equipped with an Eve device and whose front panel is made of resin Disc that can reduce the electromagnetic wave radiation and prevent electromagnetic interference to other electronic devices It is intended to provide a shield structure for a device.

[0009]

In order to achieve the above-mentioned object, a disk according to the present invention is used. The shield structure of the disk device is the shield structure of the disk device for reproducing the optical disk. And the front panel made of resin, the rear panel made of metal, the upper case made of metal, the metal Mounted in the center of the lower case inside the housing of the disk device consisting of a lower case made of Disk drive device and cross-sectional view attached to the disk drive device C-shaped metal clamp holder and one end attached to the clamp holder , The other end is a leaf spring protruding from the clamp holder, and the upper case is mounted The other end of the leaf spring that is projected by is urged by the clamp holder and the upper case. And a leaf spring for electrically connecting the.

The clamp holder is located in front of a position close to the front panel. Along the installation direction of the connection cable installed in the lower space of the disk drive device. It is good to attach it to the disk drive device.

Further, the leaf spring is provided with the clamp holder together with the disc drive. It is good to screw the housing of the live device together.

With the above configuration, the front loading type disk is A disk drive with a front panel made of resin and equipped with a disk drive device Radiation of required electromagnetic waves can be reduced and electromagnetic interference to other electronic devices can be prevented. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings as appropriate. To do. 1 is a perspective view showing a disk device according to an embodiment of the present invention. FIG. 3 is a plan view showing a disk device according to an embodiment of the present invention, and FIG. FIG. 3 is a perspective view showing a disc drive device of the disc device according to the embodiment, 4 is a vertical sectional view showing a disk device according to an embodiment of the present invention.

First, FIG. 1 is a perspective view showing a disk device according to an embodiment of the present invention. It will be explained based on.

The housing of the disk device has a front panel 21, a rear panel 22, and It is composed of an upper case 23 having a substantially U-shaped surface and a lower case 24 having a substantially U-shaped cross section. The flannel 21 is made of resin, and the rear panel 22, the upper case 23, and the lower case 24 are all These are also made of metal. The front panel 21 and the rear panel 22 are screwed to the lower case 24. The upper case 23 is screwed to the lower case 24.

The disk drive device 10 includes the lower case 24 in the center of the disk device. Mounted on the disk drive device 10, and sandwiching the disk drive device 10, the control board 41 is provided on both sides of the disk drive device 10. A power supply board 42 is mounted. The control board 41 and the power supply board 42 are connected to each other by a connection cable. The control board 41 and the disk drive device 10 are connected by the bulls 51 and 52. , Are connected by a connection cable 53.

The control board 41 has an optical disk provided on the disk drive device 10. A video / audio signal optically read from the optical disc by a backup (not shown). Video / sound that demodulates the signal and corrects the error of the demodulated video / audio signal. A video / audio signal processing circuit for decompressing the voice signal and decoding it into the original video / audio signal. A control circuit for controlling the disk drive device 10 is mounted (both shown. No). Further, the power supply board 42 is provided with a switching device for supplying electric power to the control board 41. Power supply circuit, output circuit for outputting video / audio signals to the outside, and display 21b And a circuit for transmitting data (both not shown).

FIG. 2 is a plan view showing the disk device according to the embodiment of the present invention shown in FIG. It will be explained based on.

The connection cable 51 connecting the control board 41 and the power supply board 42 is a tree cable. In the lower space of the disk drive device 10 in the position close to the front panel 21 made of oil. The connection cable 52, which is provided and connects the control board 41 and the power supply board 42, has a rear surface. It is arranged in the lower space behind the disk drive device 10 close to the panel 22, The switching power supply circuit mounted on the power supply board 42 via the connection cable 51 (see FIG. (Not shown) supplies power to the control board 41, and the control board is connected via the connection cable 52. Video / audio signals are transmitted from the board 41 to an output circuit (not shown) mounted on the power supply board 42. The image is sent from the output circuit to a plurality of output terminals (not shown) on the rear panel 22. An audio signal is output.

A connection for connecting the control board 41 and the disk drive device 10 The cable 53 is connected to the disk drive device 1 from the bottom of the disk drive device 10. 0 is a control circuit mounted on the control board 41 via the connection cable 53. Then, a control signal is sent to the disk drive device 10, and an optical pickup picks up an optical disc. The video / audio signal is optically read from the disc 30. Video / sound read out The voice signal is transmitted via the connection cable 53 to the video / audio signal mounted on the control board 41. Demodulates video / audio signals sent from the optical disc 30 and sent to the signal processing circuit. Video / audio signals that have been corrected and corrected for errors in the demodulated and demodulated video / audio signals Is expanded and decoded into the original video / audio signal.

A plurality of operation keys 21a provided on the front panel 21 are connected to each other. It is connected to the control board 41 by a cable 54, and a plurality of A microcomputer in which a command signal generated by operating the operation keys 21a is mounted on the control board 41. (Not shown) so that the disk device can operate as desired Has become.

The display portion 21b (see FIG. 1) provided on the front panel 21 is It is connected to the power supply board 42 by the connection cable 55, and the power is supplied via the connection cable 55. Display data is sent from the circuit mounted on the source board 42 to the display unit 21b, The display data is displayed on 21b.

The disk drive of the disk device according to the embodiment of the present invention shown in FIG. Description will be given based on a perspective view showing a live device.

The disk drive device 10 is a front loading type disk. It is a drive device, and includes a casing of the disc drive device 10 and a disc tray 11. Is made of resin. The disc drive device 10 is a disc on which an optical disc is mounted. Rotate the optical disc below the disc tray 11 provided with the mounting portion 11a. Turntable 12, a drive mechanism for rotating the turntable 12, and an optical disc. The optical pickup that optically reads out the video / audio signals recorded on the disc And a drive mechanism for driving the cup-up (both not shown).

The disc tray 11 on which the optical disc is mounted is a disc drive device. When the turntable 12 is retracted into the inside of the disk mounting portion 11a, From the disc mounting portion 11a of the disc tray 11 to the upper side. And is rotatably inserted into a metal clamp holder 14 having a substantially U-shaped cross section. The optical disc is chucked between the clamp 13 and the turntable 12 It is supposed to be.

A leaf spring 15 is attached to the upper part of the clamp holder 14. And one end of the leaf spring 15 together with the clamp holder 14 0 is fastened together with a screw 16 and the other end of the leaf spring 15 from the clamp holder 14 When the upper case 23 (see FIG. 1) is mounted, the clamp ho The rudder 14 is electrically connected to the upper case 23.

FIG. 4 is a longitudinal sectional view showing a disk device according to an embodiment of the present invention. It will be described with reference to the drawings.

FIG. 4 shows a state in which the upper case 23 of the disk device is mounted. Upper part When the base 23 is mounted, it is mounted on the clamp holder 14 of the disc drive device 10. The projecting other end of the attached leaf spring 15 is biased by the upper case 23, The pump holder 14 and the upper case 23 are electrically connected to each other, and electrically connected to the upper case 23. The connected clamp holder 14 is electrically connected to the lower case 24 screwed to the upper case 23. It is supposed to be connected. Then, along the arrangement direction of the connection cable 51, Clamp holder attached to the disk drive device 10 with a substantially U-shaped cross section 14 and the lower case 24 form a resin-made front panel 21 (see FIG. 1 or 2). Connection cable arranged in the lower space of the disk drive device 10 at a close position 51 is shielded from the control board 41 and the power supply board 42 to the connection cable 51. It is designed to reduce the radiation of unwanted electromagnetic waves. This makes the resin front Connection cable 5 arranged at a position close to the face panel 21 (see FIG. 1 or 2) The unnecessary electromagnetic waves radiated from 1 are clamp holder 14 made of metal and the lower case made of metal. Since it can be shielded by 24, the front panel made of resin of the disk device It is possible to reduce unnecessary electromagnetic waves radiated to the outside from the side of the module 21, and other electronic devices. It is possible to prevent electromagnetic interference.

The embodiment of the present invention has been described in detail above, but the present invention is not limited to this. Of course, modifications and improvements can be made within the ordinary knowledge of those skilled in the art. For example, Install one end of the leaf spring so that it protrudes above the clamp holder made of metal with a roughly U-shaped surface. The clamp holder and the metal by pressing the protruding end of the leaf spring with the upper case. Although it has been described that it is electrically connected to the upper case made of metal, it is made of metal with an approximately U-shaped cross section. Attach the coil spring to the upper part of the clamp holder of the Energize the coil spring to electrically connect the clamp holder to the metal upper case. You may ask.

[0030]

As described above, the disk device shield according to the present invention According to the structure, a resin front panel, a metal back panel, a metal upper case, It is placed in the center of the lower case inside the disk drive housing consisting of a metal lower case. The disk drive device that is close to the front panel. Along the installation direction of the connection cable installed in the lower space of the -Made clamp holder is attached, together with the clamp holder, disk drive device Tighten one end of the leaf spring to the housing together with a screw, and project the other end from the clamp holder. In this way, the other end of the leaf spring protruding by the mounting of the upper case is urged, and the clamp ho Electrically connect the holder to the upper case, and then use the metal clamp holder and the metal lower case. The connection cable can be shielded by the cable. This allows the flow The front panel is made of resin and is equipped with a front loading type disk drive device. It reduces the emission of unnecessary electromagnetic waves from a certain disk device, and prevents electromagnetic interference to other electronic devices. It can prevent harm.

The shield structure of the disk device according to the invention of claim 1 is made of resin. Front panel, metal back panel, metal top case, metal bottom case Disk drive device mounted in the center of the lower case inside the Is placed in the lower space of the disk drive device close to the front panel. Install a metal clamp holder with a U-shaped cross section along the connection cable installation direction. Attach one end of the leaf spring to the disk drive device housing together with the clamp holder. Together with a screw so that the other end projects from the clamp holder. The other end of the leaf spring that protrudes is biased by the mounting, and the clamp holder and the upper case are electrically charged. I'm able to be connected physically.

The shield structure of the disk device according to the second aspect is made of resin. Front panel, metal back panel, metal top case, metal bottom case Disk drive device mounted in the center of the lower case inside the Mount a metal clamp holder with a U-shaped cross section, and clamp one end of the leaf spring. Attached to the upper holder so that the other end projects from the clamp holder. The other end of the protruding leaf spring is urged by mounting the It can be electrically connected.

According to a third aspect of the present invention, there is provided a disk device shield structure comprising: Connection cable located in the lower space of the disk drive device close to the channel Mount the clamp holder to the disc drive unit along the I am sorry.

According to a fourth aspect of the present invention, there is provided a disk device shield structure comprising a leaf spring. Together with the clamp holder to the disk drive housing with screws. I have to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a disk device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a disk device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a disk drive device of a disk device according to an embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a disk device according to an embodiment of the present invention.

[Explanation of symbols]

10 Disk drive device 11 Disc tray 11a disk mounting part 12 turntable 13 clamps 14 Clamp holder 15 leaf spring 16 screws 21 Front panel 21a Operation key 21b Display section 22 Rear panel 23 Upper case 24 lower case 30 optical disks 41 Control board 42 Power board 51, 52, 53, 54, 55 connection cables

Claims (4)

[Scope of utility model registration request] 1. A shield structure for a disc device for reproducing an optical disc, comprising a front panel made of resin, a rear panel made of metal, an upper case made of metal, and a lower case made of metal, and being inside a housing of the disc apparatus Mounted on the disk drive device along the installation direction of the disk drive device placed in the central portion of the lower case and the connection cable arranged in the lower space of the disk drive device near the front panel. A clamp holder made of a metal having a substantially U-shaped cross section, and a leaf spring projecting from the clamp holder at the other end, together with the clamp holder, is fastened together with a casing of the disk drive device at one end by a screw,
A shield structure for a disk device, comprising: a leaf spring that is biased at the other end of the leaf spring that protrudes when the upper case is mounted and that electrically connects the clamp holder and the upper case. 2. A shield structure for a disc device for reproducing an optical disc, comprising a front panel made of resin, a rear panel made of metal, an upper case made of metal, and a lower case made of metal, in a housing of the disc apparatus. A disk drive device placed in the center of the lower case, a metal clamp holder having a substantially U-shaped cross section attached to the disk drive device, and one end attached to the clamp holder,
A leaf spring having the other end projecting from the clamp holder, and the other end of the leaf spring projecting when the upper case is mounted is urged to electrically connect the clamp holder and the upper case. A shield structure for a disk device, characterized by being provided with. 3. The clamp holder is attached to the disc drive device along the arrangement direction of a connection cable arranged in a lower space of the disc drive device at a position close to the front panel. The shield structure for a disk device according to claim 2. 4. The shield structure for a disk device according to claim 2, wherein the leaf spring is fastened together with the clamp holder to a housing of the disk drive device with a screw.