CN1306520C - CD drive - Google Patents

Abstract

An optical disk drive comprises a machine core, a protective cover, an upper protruding conductor, a lower protruding conductor and a lower cover of the optical disk drive. The protective cover is arranged below the movement and provided with an upper surface and a lower surface. The protective cover also comprises an upper protruding conductor and a lower protruding conductor. The upper protruding conductor protrudes from the upper surface and is electrically contacted with the movement. In contrast, the lower protruding conductor protrudes from the lower surface. The CD machine lower cover is arranged below the protective cover and is grounded, and the CD machine lower cover is electrically contacted with the lower protruding conductor.

Description

CD drive

technical field

The invention relates to an optical disc drive, and in particular to an optical disc drive which reduces electromagnetic radiation interference and prevents static interference.

Background technique

Thin disc drives generally have components such as a traverse and a carrier. The movement at least includes components such as a spindle motor, an optical pickup, a guide rail, and a turntable.

Since some components of the movement, such as the spindle motor, are electromagnetic radiation sources that emit electromagnetic waves, when the energy of the electromagnetic radiation is high, the electromagnetic radiation will become electronic noise that interferes with electronic signals and reduces signal integrity. There is the problem of electromagnetic interference (EMI). Electronic noise may also come from wires, printed circuit board traces, etc. When electronic noise is radiated to the surrounding area, it can be coupled to nearby signal lines and other conductors.

On the other hand, interference from electrostatic discharge (ESD) is also a common problem in optical disk drives. For optical disc drives, most of the external static electricity comes from the fingers of the human body, especially in a dry and cold environment, the human body is more likely to be charged with static electricity. When a user with a charged finger turns on the optical disc drive, the static electricity will be transmitted from the fingertip to the touched part of the optical disc drive instantly, thus damaging the optical disc drive.

For thin optical disk drives, the above-mentioned electrostatic discharge interference problem is even more important. Because the general user opens the CD-ROM machine to insert the CD-ROM, so when the fingertip touches the movement, the static electricity will be released and generate a momentary high voltage. In this way, it is easy to cause damage to the movement and surrounding electronic components.

At the same time, most of the optical disc drive platforms in the prior art are made of non-conductive materials, so the optical disc drive is likely to have the problem of excessive electromagnetic radiation energy. For some thin optical disc drives, a metal lower cover is provided at the bottom of the optical disc drive platform in order to exert a shielding effect and reduce electromagnetic interference. Furthermore, due to the need for thinning, the lower metal cover has corresponding openings corresponding to some components of the movement, so as to prevent the components from directly contacting the lower metal cover. However, these openings provide leakage channels for electromagnetic radiation, which greatly reduces the shielding effect against electromagnetic interference. At the same time, the problem of static interference still exists.

Contents of the invention

Therefore, the object of the present invention is to provide an optical disk drive, which can reduce external static interference by grounding the core of the optical disk drive. Moreover, the opening of the protective cover is covered by the conductive sheet, so that the protective cover can exert a proper shielding effect, and the electromagnetic radiation interference can be reduced at the same time.

According to the above purpose, the present invention proposes an optical disk drive, which includes a core, a conductive protective cover, an upper protruding conductor, a lower protruding conductor and a lower cover of the optical disc drive. The protection cover is arranged under the movement, and the protection cover has an upper surface facing the movement and a lower surface facing away from the movement, and the lower surface is opposite to the upper surface. Wherein the protective cover includes an upper protruding conductor and a lower protruding conductor. The upper protruding conductor protrudes from the upper surface and is in electrical contact with the movement. In contrast, the lower protruding conductor protrudes from the lower surface. The lower cover of the optical disc drive is arranged under the protective cover and grounded, and the lower cover of the optical disc drive is in electrical contact with the lower protruding conductor. When external static electricity enters the movement, the static electricity will be conducted to the protective cover through the upper protruding conductor in sequence, and then conducted to the lower cover of the optical disc drive through the lower protruding conductor.

According to still another object of the present invention, an optical disc drive is proposed, which includes a core, a conductive protective cover, a conductive sheet, a lower protruding conductor, and a lower cover of the optical disc drive. The protection cover is arranged under the movement, and the protection cover has at least one opening. The conductive sheet covers the opening and is in electrical contact with the movement through screws. The lower protruding conductor protrudes from the lower surface of the protective cover. The lower cover of the optical disk drive is in electrical contact with the lower protruding conductor.

In the above-mentioned optical disk drive of the present invention, the protective cover is a metal protective cover. And the bottom of the metal protective cover is provided with a lower protruding conductor.

In addition, the lower cover of the optical disc drive is arranged under the metal protection cover and grounded, and the lower cover of the optical disc drive is in electrical contact with the lower protruding conductor.

Moreover, in the optical disk drive of the present invention, the conductive sheet is a metal foil attached to the metal protective cover.

In order to make the above-mentioned purpose, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is a top view showing a protective cover of an optical disc drive according to a first embodiment of the present invention.

2 is a cross-sectional view of the protective cover of the optical disc drive along the section line 1A-1A' in FIG. 1 and a schematic side view of the optical disc drive core according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged view showing area A in FIG. 2 .

FIG. 4 is a partially enlarged view showing area B in FIG. 2 .

FIG. 5 is a top view showing a protective cover of an optical disc drive according to a second embodiment of the present invention.

6 is a cross-sectional view of the protective cover of the optical disc drive along the section line 5A-5A' in FIG. 5 and a schematic side view of the core of the optical disc drive according to the second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a protective cover and a schematic side view of a drive according to a third embodiment of the present invention.

Explanation of reference signs:

100, 500, 700: CD drive

102, 502: movement

104, 504, 702: Protective cover

106: Upper protruding conductor

108, 508, 706: lower protruding conductor

110: CD drive lower cover

112: Tray

114: Spindle motor

1162, 1164, 5102, 5104, 5106: screw holes

118, 506: conductive sheet

120: Protective cover upper surface

122: Lower surface of protective cover

512: screw

704: Conductive material

Detailed ways

Because the electronic components in the optical disc drive are easy to form the source of electromagnetic radiation, electromagnetic interference occurs, and the external static interference reduces the performance of the optical disc drive and shortens the life of the electronic components. It is therefore an object of the present invention to solve the aforementioned problems. The implementation is as the following example.

Embodiment one

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 1 is a top view showing the protective cover of the optical disc drive according to the first embodiment of the present invention. FIG. A schematic side view of the disc player core of the first embodiment of the present invention.

The optical disc drive 100 includes a core 102 , a protective cover 104 , an upper protruding conductor 106 , a lower protruding conductor 108 and a lower cover 110 of the optical disc drive. The core 102 is disposed between a tray 112 and the protective cover 104 , and the core 102 includes various electronic components, such as a spindle motor 114 and an optical pickup (not shown in the figure).

The protection cover 104 is disposed adjacent to the bottom of the movement 102 , and the protection cover 104 has an upper surface 120 facing the movement 102 and a lower surface 122 facing away from the movement 102 , and the lower surface 122 is opposite to the upper surface 120 .

Furthermore, the protective cover 104 includes an upper protruding conductor 106 and a lower protruding conductor 108 . The upper protruding conductor 106 protrudes from the upper surface 120 and is in electrical contact with the movement 102 . In contrast, the lower protruding conductor 108 protrudes from the lower surface 122 and is in electrical contact with the lower cover 110 of the optical disc drive disposed under the protective cover 104 , wherein the lower cover 110 of the optical disc drive is in a grounded state.

Preferably, the protective cover 104 is made of high-conductivity metal, and the upper protruding conductor 106 and the lower protruding conductor 108 are integrally formed with the protective cover 104 . Also due to the ductility of metal, the upper protruding conductor 106 and the lower protruding conductor 108 can be elastic bodies at the same time.

For example, please refer to FIG. 3 , which shows a partially enlarged view of area A in FIG. 2 . The upper protruding conductor 106 in FIG. 3 is formed by stamping the protective cover 104 made of metal to form an approximately inverted L-shaped protruding body. Also, please refer to FIG. 4 , which shows a partially enlarged view of area B in FIG. 2 . The lower protruding conductor 108 in FIG. 4 is formed by stamping the protective cover 104 made of metal to form an approximately inverted triangle protruding body.

The core 102 is connected to the protective cover 104 through the upper protruding conductor 106 , and the protective cover 104 is connected to the lower cover 110 of the optical disc drive through the lower protruding conductor 108 .

Therefore, when external static electricity, such as the static electricity carried by the user, enters the movement 102, the static electricity will be conducted to the protective cover 104 through the upper protruding conductor 106 in sequence, and then conducted to the lower cover of the optical disc drive through the lower protruding conductor 108. 110, finally grounded and released. In this way, the movement 102 or the electronic components adjacent to the movement are no longer disturbed by the phenomenon of electrostatic discharge, that is, the function of electrostatic protection is played. Moreover, the electromagnetic radiation energy will also be reduced through this conduction mechanism, so that the ability of the optical disk drive 100 to resist electromagnetic interference is simultaneously improved.

In addition, in fact, the protective cover 104 of the thin disc drive 100 has at least one opening to meet design requirements, such as the openings 1162 and 1164 shown in FIG. 1 . In order to prevent these openings from becoming leakage channels of electromagnetic radiation, thereby reducing the ability to resist electromagnetic interference, a conductive sheet can be used to selectively seal all the openings or one of the openings. For example, the conductive sheet 118 is covered on the opening 1164 to shield electromagnetic radiation, and the number of openings is reduced to improve the ability to resist electromagnetic interference. The conductive sheet is, for example, a highly conductive metal foil (aluminum foil, copper foil, etc.) with good ductility.

Furthermore, when the conductive sheet 118 is in electrical contact with the movement 102 , the static electricity can also be conducted from the movement 102 to the protective cover 104 , and exert the same electrostatic conduction effect as the upper protruding conductor 106 .

Embodiment two

Please refer to FIG. 5 and FIG. 6 at the same time. FIG. 5 shows a top view of a protective cover for an optical disc drive according to a second embodiment of the present invention. FIG. 6 shows a sectional view of the protective cover of the optical disc drive along the section line 5A-5A' in FIG. 5 and a schematic side view of the core of the optical disc drive according to the second embodiment of the present invention.

The main difference between the optical disk drive 500 of the present embodiment and the optical disk drive 100 of the first embodiment is that the upper protruding conductor 106 is replaced by the conductive sheet 506 , and the same symbols are used for other identical components, which will not be repeated here.

The optical disk drive 500 at least includes a core 502 , a protective cover 504 and a conductive sheet 506 . Preferably, the protection cover 504 is a metal protection cover and is disposed under the movement 502 . The protective cover 504 has at least one opening, such as three openings 5102 , 5104 and 5106 shown in FIG. 5 .

The conductive sheet 506 simultaneously covers the openings 5102 , 5104 and 5106 and is in electrical contact with the movement 502 . The conductive sheet 506 is a highly conductive metal foil with good ductility. In detail. As shown in FIG. 5 , the conductive sheet 506 is connected to a screw 512 fixed on the bottom of the movement 502 , thereby serving as a bridge connecting the movement 502 and the protective cover 504 .

Apparently, the arrangement of the conductive sheet 506 not only seals possible electromagnetic radiation leakage channels (openings), but also guides static electricity from the movement 502 to the protective cover 504 .

In addition, a lower protruding conductor 508 is provided on the lower surface of the protective cover 504 for electrical contact with the lower cover 110 of the optical disc drive that is disposed below the protective cover 504 and grounded, wherein the lower protruding conductor 508 is preferably formed integrally with the protective cover 504 and is an elastic body.

The above-mentioned setting method can play the same effect as the first embodiment, that is, when the external static electricity enters the movement 502, the static electricity will be conducted to the protective cover 504 through the conductive sheet 506, and then conducted to the optical disc through the lower protruding conductor 508 The lower cover 110 is finally released by grounding the lower cover 110 of the optical disc drive.

As can be seen from the above description, the second embodiment of the present invention can not only reduce the interference of electromagnetic radiation, but also effectively prevent the interference of static electricity, and at the same time exert dual functions to achieve the purpose of protecting the core of the optical disc drive and the surrounding electronic components.

Embodiment Three

Please refer to FIG. 7 , which shows a cross-sectional view of the protective cover of the optical disc drive and a schematic side view of the core according to the third embodiment of the present invention. In FIG. 7 , the difference between the optical disk drive 700 of this embodiment and the optical disk drive 100 of the first embodiment is that the protective cover 702 can be made of different materials, and the same symbols are used for other identical components, which will not be repeated here.

The protective cover 702 is, for example, an insulating material made of plastic, and a layer of conductive material 704 is coated on the protective cover 720 to form a shielding cover for exerting a shielding effect against electromagnetic interference. The conductive material 704 can be, for example, an acrylic paint containing metal particles, or a layer of plated metal.

The upper protruding conductor 106 is in electrical communication with the lower protruding conductor 706 through the conductive material 704 . When external static electricity enters the core 102, the static electricity will be conducted to the conductive material 704 via the upper protruding conductor 106, then conducted to the lower cover 110 of the optical disc drive through the lower protruding conductor 706, and finally grounded and released.

The optical disc drive disclosed in the above-mentioned embodiments of the present invention provides electrical conduction between the core of the optical disc drive and the lower cover of the optical disc drive by arranging a protruding conductor or conductive sheet on the protective cover of the optical disc drive, so that external static electricity can pass through. Highlight the conduction of conductors or conductive sheets and then release to the ground to achieve the purpose of electrostatic protection.

On the other hand, using the conductive sheet to close the opening on the protective cover can improve the shielding effect against electromagnetic interference. Apparently, the optical disc drive of the present invention has dual functions of preventing static interference and reducing electromagnetic interference.

In summary, although the present invention has been disclosed above through a preferred embodiment, it is not intended to limit the present invention. Those of ordinary skill in the art may make various modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (16)

1. A CD player, comprising: a movement; A conductive protective cover, which is arranged under the movement, the protection cover has an upper surface facing the movement and a lower surface facing away from the movement and opposite to the upper surface, the The protective cover includes: an upper protruding conductor protruding from the upper surface and in electrical contact with the movement; and a lower protruding conductor protruding from the lower surface; and A lower cover of the optical disc drive is arranged under the protection cover, and the lower cover of the optical disc drive is in electrical contact with the lower protruding conductor. 2. The optical disk drive as claimed in claim 1, wherein the protective cover is made of metal, and the upper protruding conductor and the lower protruding conductor are integrally formed with the protective cover respectively. 3. The optical disk drive of claim 1, wherein the upper protruding conductor is an elastic body. 4. The optical disk drive of claim 1, wherein the lower protruding conductor is an elastic body. 5. The optical disk drive as claimed in claim 1, wherein a layer of conductive material is coated on the protective cover. 6. The optical disk drive of claim 5, wherein the upper protruding conductor is in electrical contact with the lower protruding conductor through the conductive material of the layer. 7. The optical disc drive according to claim 1, wherein the protective cover is made of metal, and the protective cover has at least one opening, the optical disc drive further comprises: A conductive sheet covers the opening, and the conductive sheet is in electrical contact with the core. 8. The optical disk drive as claimed in claim 7, wherein the conductive sheet is a metal foil. 9. A CD player, comprising: a movement; A conductive protective cover, which is arranged under the movement, the protective cover has an upper surface facing the movement, a lower surface opposite to the upper surface, and at least one opening; a protruding conductor protruding beyond said lower surface; a conductive sheet covering the opening and in electrical contact with the core; and A lower cover of the optical disc drive, which is arranged under the protective cover, and the lower cover of the optical disc drive is in electrical contact with the lower protruding conductor; When external static electricity enters the movement, the static electricity will be conducted to the lower cover of the CD player through the conductive sheet of the protective cover and the lower protruding conductor in sequence. 10. The optical disk drive as claimed in claim 9, wherein the protective cover is made of metal, and the lower protruding conductor is integrally formed with the protective cover. 11. The optical disk drive of claim 9, wherein the lower protruding conductor is an elastic body. 12. The optical disk drive of claim 9, wherein the conductive sheet is a metal foil. 13. A CD player, comprising: a movement; a conductive protective cover, which is arranged under the movement, and the protective cover has at least one opening; A conductive sheet, which covers the opening and is in electrical contact with the movement through screws; a lower protruding conductor protruding from a lower surface of the protective cover; and A lower cover of the optical disc drive is in electrical contact with the lower protruding conductor. 14. The optical disk drive of claim 13, wherein the conductive sheet is a metal foil. 15. The optical disc drive as claimed in claim 13, wherein the lower cover of the optical disc drive is disposed under the protection cover and grounded. 16. The optical disk drive of claim 13, wherein the lower protruding conductor is integrally formed with the protective cover.

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