CN102403005A - Slim CD-ROM - Google Patents

Abstract

The invention discloses a thin type CD machine, wherein a lower shell is provided with a slide rail, and the rear end is provided with a connector. The tray is supported by the slide rail to slide in or out of the optical disk drive, and the protective bottom plate is provided with an isolation part and covers the bottom of the tray. One end of the flat cable is connected with a connector and flatly attached to the lower shell, a bent area is formed in the reverse direction when the flat cable is close to the opening, and the other end of the flat cable is connected to the rear end of the tray. When the tray slides into the optical disk drive for reading and writing, the flat cable is accommodated between the protective bottom plate and the lower shell, and the isolation part is positioned above the flat cable bending area and covers the flat cable of the preset line, so as to reduce signal interference.

Description

Slim CD-ROM

technical field

The invention relates to an optical disc drive, in particular to a thin optical disc drive which utilizes a tray to carry optical discs into and out of the optical disc drive to replace the optical disc or read and write data on the optical disc.

Background technique

The thin disc drive uses two types of cables, such as Flexible Printed Circuit (FPC cable for short) or Flexible Flat Circuit (FFC cable for short), to electrically connect the fixed motherboard and the movable tray. Provide the power supply of electronic components on the tray and the transmission of read and write signals.

As shown in Figure 1, it is an existing thin optical disc drive 1, and a main circuit board 3 is arranged at the rear end of the lower case 2, and guide rails (not shown) are provided on both sides of the lower case 2 to support and carry the optical disc. A tray 5 of discs 4 is slid into or out of the disc drive 1 . The tray 5 is further provided with a spindle motor 6 to rotate the optical disc 4 and a read head 7 for reading and writing data from the optical disc 4 . The rear end of the tray 5 is connected to the cable 8, and the other end of the cable 8 is connected to the main circuit board 3, so that the main circuit board 3 transmits power and control signals through the cable 8, controls the spindle motor 6 to rotate the optical disc 4, and moves and reads The head 7 reads the data signal from the rotating optical disk 4, and then transmits the data signal back to the main circuit board 3 through the cable 8 for signal processing. In order to protect the precision parts on the tray 5 from being touched by the user and reduce electromagnetic interference when the optical disk drive 1 is slid out, the bottom of the tray 5 is covered with a metal protective bottom plate 9 .

Among them, after one end of the cable 8 is connected to the main circuit board 3, it extends toward the opening 10 of the front end of the optical disc drive 1, and is fixed on the lower casing 2 flatly. At the rear end of tray 5. When the tray 5 carries the optical disk 4 and slides into the optical disk drive 1 for reading and writing, the cable 8 is accommodated in the space between the protective bottom plate 9 and the lower casing 2 .

However, in order to comply with the consumer trend of light, thin and small, the thin optical disc drive 1 reduces the thickness of the optical disc drive 1 so that the protective bottom plate 9 and the lower case 2 are close to each other, resulting in the cable 8 being squeezed in a limited space, causing the cable 8. The interference of the transmission signal reduces the stability of the CD player 1. Therefore, there is still a problem to be solved in the interference of the transmission signal of the cable 8 in the existing thin optical disk drive.

Contents of the invention

The object of the present invention is to provide a thin optical disk drive, which reduces the capacitive effect between the protective bottom plate and the lower case by setting up the isolation part of the cable, so as to avoid the interference of the signal transmitted by the cable.

Another object of the present invention is to provide a thin optical disk drive, in which a through hole is formed on the protective bottom plate located in the bending area of the cable to reduce the capacitive effect, so as to reduce the interference of the signal transmitted by the cable.

Another object of the present invention is to provide a thin optical disc player, only for the weak signal line in the cable, and form a through hole in the protection bottom plate in the bending area to reduce the capacitance effect, so as to reduce the interference of the signal transmitted by the cable.

Another object of the present invention is to provide a thin CD player. For the weak signal lines in the cable, according to the strength of the signal lines, several rows of through holes with different apertures are formed on the protection base plate in the bending area to reduce the capacitive effect, and at the same time Consider the protective parts to reduce the interference of the cable transmission signal.

Yet another object of the present invention is to provide a thin CD player. The isolation part is formed on the protective bottom plate in the bending area of the cable, and the insulation layer between the cable and the lower case is used to strengthen and reduce the capacitive effect, so as to reduce the transmission signal of the cable. interference.

In order to achieve the purpose of the aforementioned invention, the thin optical disk drive of the present invention is provided with slide rails on both sides of the lower casing, and a connector is provided at the rear end. The bottom plate is provided with an isolation part. The cable contains several lines, one end is connected to the connector, and is fixed flat on the lower case. When it is close to the opening, a bending area is formed in the opposite direction. The other end of the cable is suspended and connected to the rear end of the tray. When the tray slides into the CD-ROM When reading and writing, the cable is stored between the protection base plate and the lower case, and the isolation part is located above the bending area of the cable, covering the cable of a predetermined line.

The isolation part of the thin optical disk drive of the present invention includes at least one through hole or a row of multiple through holes, which can cover only the weak signal lines in the cable or several rows of weak signal lines in the cable respectively, and the wider through holes cover stronger signal lines, while narrower vias cover lines for weaker signals. In addition, an insulating layer is provided between the cable and the lower casing, and the insulating layer can be provided at the bending area of the cable. The cable can be an FFC cable, and the isolation part can be an insulating layer.

Description of drawings

FIG. 1 is a side sectional view of a conventional thin disc drive. ;

Fig. 2 is a partial enlarged view of area A in Fig. 1;

FIG. 3 is a front perspective view of the thin disc drive according to the first embodiment of the present invention;

FIG. 4 is a rear perspective view of the thin disc drive according to the first embodiment of the present invention;

Fig. 5 is a side sectional view of the thin disc drive of the present invention;

FIG. 6 is a protective bottom plate of the thin disc drive according to the second embodiment of the present invention;

FIG. 7 is a protective bottom plate of a thin disc drive according to a third embodiment of the present invention;

FIG. 8 is a protective bottom plate of a thin disc drive according to a fourth embodiment of the present invention;

FIG. 9 is a partial side sectional view of a thin disc drive according to a fifth embodiment of the present invention.

Description of main component symbols

CD drive 20

Cable 21, 70

Lower case 22, 71

Connector 23

opening 24

Bending area 25, 75

Tray 26

Spindle motor 27

Read head 28

Slide rail 29

Protection base plate 30, 40, 50, 60, 73

Quarantine Department 31, 41, 51, 61, 74

Through hole 32

CD 33

Insulation layer 72

Detailed ways

In order to achieve the above object, the present invention adopts the technical means and its effects, hereby give preferred embodiments, and illustrate as follows in conjunction with the accompanying drawings.

Please refer to FIG. 2 , which is a partially enlarged view of area A in FIG. 1 . Analyze the cause of the signal interference of cable 8 in the existing thin optical disc drive. Due to the limitation of the thickness of the thin optical disc drive, the lower case 2 and the protective base 9, both of which are made of metal, are close to each other. In addition, the cable 8 stored therein has a current passing through it, and the inductance effect makes it easy for electrons of opposite sex to gather separately. The capacitive effect (Effect of Capacity) between the lower case 2 and the protection base 9 is formed in the lower case 2 and the protection base 9 . When too many electrons are gathered, the inductance effect generated by the capacitive effect will increase, which will interfere with the signal transmitted by the cable 8, especially for the SATA optical disc drive with more precise signal requirements, the interference will be more serious.

Because the current of the cable 8 bends and turns in the bending area 11, the electromagnetic change is the largest. After testing, the position where the capacitive effect is the strongest occurs in the bending area 11 in the opposite direction of the cable 8, which often causes signal interference and affects the optical disc. machine stability. Although the FPC cable can be made into a variety of thinner shapes such as U-shaped according to the configuration requirements of the optical disc drive, so as to reduce the stacking height of the cable and reduce the capacitive effect, the manufacturing process is more complicated and the cost is higher. Therefore, recently, low-cost FFC cables have been gradually adopted in CD-ROM drives. However, straight FFC cables are thicker and cannot be bent and placed on a flat surface at will. They must be bent and stacked, which can easily cause interference in signal transmission. Moreover, as the thickness of the optical disk drive becomes thinner, the protective bottom plate 9 and the lower casing 2 will be closer, the phenomenon of squeezing the cable 8 will be more serious, and the capacitive effect will be more obvious.

As shown in FIG. 3 , it is a thin optical disk drive according to the first embodiment of the present invention. In this embodiment, an FFC cable is used as an example for illustration. The cable 21 of the optical disc drive 20 is connected to the connector 23 arranged at the rear end of the lower casing 22 at one end, and extends toward the opening 24 at the front end of the optical disc drive 20, and is fixed on the lower casing 22 made of metal. Inwardly, the bending area 25 of the folded end is formed on the top of the flat cable 21 , and the other end of the cable 21 extending from the bending area 25 is connected to the rear end of the tray 26 in a suspended manner. The tray 26 is provided with precision components such as a spindle motor 27 for rotating the disc and a read head 28 for reading and writing data, and is supported by slide rails 29 on both sides of the lower casing 22 to slide in or out of the disc drive 20 .

Please refer to FIG. 4 and FIG. 5 at the same time. FIG. 4 is a back view of the thin optical disc drive 20 of the present invention, and FIG. 5 is a side sectional view of the thin optical disc drive 20 of the present invention. In order to protect the precision parts thereon, the tray 26 utilizes a protective bottom plate 30 to cover the bottom. An isolation portion 31 is disposed on the protection bottom plate 30 , and the isolation portion 31 is formed by a row of a plurality of through holes 32 . When the tray 26 carries the optical disk 33 and slides into the optical disk drive 20 for reading and writing, the FFC cable 21 is directly stacked on the top of the flat cable 21, and is stored in the narrow space between the protective bottom plate 30 and the lower case 22 . The isolation portion 31 is just above the bending area 25 of the folding end of the cable 21 . Since the through hole 32 of the isolation part 31 reduces the volume of the protective bottom plate 30 above the bending area 25, the space for electrons to stay is reduced, relatively reducing the opposite-sex electrons staying in the lower case 22 where the bending area 25 is located, thereby reducing the capacitive effect, Avoid cable transmission signal interference.

Therefore, in the thin optical disk drive according to the first embodiment of the present invention, a plurality of through holes can be formed on the protective base plate located above the bending area of the cable, and an isolation portion for the cable can be set up to reduce the capacitive effect between the protective base plate and the lower case. , to achieve the purpose of avoiding the interference of cable transmission signals, and at the same time increase the stability of the CD player. In addition, the multiple through holes of the protective bottom plate can be integrally formed when the protective bottom plate is manufactured, without increasing the material cost of the optical disk drive.

As shown in FIG. 6 , it is the protective bottom plate 40 of the thin disc drive according to the second embodiment of the present invention. The basic structure of the thin optical disc drive in this embodiment is the same as that in the first embodiment, except that the isolation part 41 on the protection base plate 40 in this embodiment is different. Since the signal interference generated by the capacitive effect occurs in the bending area of the cable, the first embodiment considers the protection of precision parts, and only makes the isolation part a plurality of smaller through holes to reduce the volume of the protective bottom plate above the bending area. to reduce capacitive effects. In this embodiment, under the risk of sacrificing a little protection of precision parts, a plurality of through holes in the first embodiment are directly formed on the protective base plate 40 with a larger through hole in the isolation part 41, covering the bending area of the cable, and the entire Eliminate the space for electrons to stay, and completely avoid signal interference caused by capacitive effects. According to the foregoing description, if the risk of protecting precision components is not desired, the large through hole of the isolation portion 41 can also be replaced by an insulating layer, which also achieves the purpose of avoiding the capacitive effect.

As shown in FIG. 7 , it is the protective bottom plate 50 of the thin disc drive according to the third embodiment of the present invention. The basic structure of the thin optical disc drive in this embodiment is the same as that in the first embodiment, except that the isolation portion 51 of the protection base plate 50 in this embodiment has a smaller through-hole width. Since the cable contains multiple transmission lines, each line has a different strength of transmission signal, the line with strong signal will not be disturbed by the capacitive effect, while the line with weak signal is very susceptible to interference. Therefore, it is only necessary to form an isolation part 51 with a predetermined line width for the bending area of the weak signal line, and only cover the bending area of the weak signal line of the cable, so as to reduce the capacitive effect, and at the same time avoid excessive reduction of the protection base plate 50 to protect the precision parts. function.

As shown in FIG. 8 , it is a protective bottom plate 60 of a thin disc drive according to a fourth embodiment of the present invention. The basic structure of the thin disc drive in this embodiment is the same as that in the first embodiment, except that the isolation portion 61 of the protection base 60 in this embodiment has multiple rows of through holes with different widths. As described in the third embodiment, when the cable has several scattered weak signal lines, it is also possible to form several rows of isolation portions 61 of through holes with different widths for the bending area of the weak signal lines according to the strength of the signal. The wider through-holes cover stronger signal lines, while the narrower ones cover weaker signal lines, so as to reduce capacitive effects and avoid reducing the function of the protection base 60 to protect precision components.

Therefore, the thin optical disc drive of the present invention can aim at the weak signal lines in the cable, and according to the strength of the signal lines, several rows of through holes with different widths and apertures can be formed on the protective base plate in the bending area to form the isolation part. Cover the strong and weak lines of the signal, reduce the capacitive effect, and take into account the protection parts, so as to reduce the interference of the cable transmission signal.

As shown in FIG. 9, it is a thin optical disk drive according to a fifth embodiment of the present invention. The basic structure of the thin optical disk drive of this embodiment is the same as that of the first embodiment, except that an insulating layer 72 is attached between the cable 70 and the lower casing 71 of this embodiment. In the aforementioned embodiments, the isolation portion 74 is provided on the protective bottom plate 73 to unilaterally reduce the space for electrons to stay. Although the capacitive induction between the protective bottom plate 73 and the lower casing 71 can be relatively reduced, if the space for the electronic residence of the lower casing 71 can be reduced at the same time, Capacitive induction can be greatly reduced. Since the cable 70 must be firmly attached to the lower casing 71 , otherwise it is easy to be crushed by the tray when falling off, thus blocking the signal transmission. Therefore, it is difficult to form a through hole in the lower casing 71 below the cable 70. In this embodiment, an insulating layer 72 is provided between the cable 70 and the lower casing 71, or an insulating layer is only provided at the bending area 75 of the cable 70. 72, so that the lower casing 71 is not easily affected by the cable 70, and reduces the capacitive induction formed with the protective bottom plate 73, so as to reduce signal interference.

Therefore, the thin optical disk drive of the present invention can form an isolation part on the protective bottom plate in the bending area of the cable, and at the same time cooperate with the insulating layer between the cable and the lower casing to strengthen and reduce the capacitive effect, so as to reduce the signal interference of the cable transmission the goal of.

The above-mentioned content is only for the convenience of describing the preferred embodiments of the present invention, the scope of the present invention is not limited to these preferred embodiments, any changes made according to the present invention, without departing from the spirit of the present invention , all belong to the scope of the patent application of the present invention.

Claims (10)

1. thin optical disc machine comprises:

Lower casing, slide rail is established in both sides, and a connector is established in the rear end;

Pallet is supported by slide rail, can slide into or skid off the opening of CD player, and utilizes a protection base plate to cover the bottom;

Winding displacement comprises several circuits, and winding displacement one end connects this connector, extend to this opening, and smooth this lower casing that is fixed on, oppositely interior formation bending district during near opening, and bend the winding displacement other end of distinguishing extension by this, suspending is connected the rear end of pallet; And

The isolation part is located at the protection base plate;

Wherein, when pallet slides into CD player when reading and writing, winding displacement is accommodated between protection base plate and lower casing, and the isolation part is positioned at the top in winding displacement bending district, covers the predetermined bar circuit of winding displacement.

2. thin optical disc machine as claimed in claim 1, wherein this isolation part comprises at least one through hole.

3. thin optical disc machine as claimed in claim 1, wherein this isolation part comprises a plurality of through holes of at least one row.

4. thin optical disc machine as claimed in claim 1, wherein this isolation part is an insulation course.

5. thin optical disc machine as claimed in claim 1, wherein this isolation part only covers weak signal circuit in the winding displacement.

6. thin optical disc machine as claimed in claim 5, wherein this isolation part forms number row different in width through hole, covers number row weak signal circuit in the winding displacement respectively.

7. thin optical disc machine as claimed in claim 6, wherein the through hole of this broad covers the circuit of strong signal, and narrower through hole covers the circuit than weak signal.

8. thin optical disc machine as claimed in claim 1 is wherein established insulation course between this winding displacement and lower casing.

9. thin optical disc machine as claimed in claim 7, wherein this insulation course is located at the bending district of winding displacement.

10. thin optical disc machine as claimed in claim 1, wherein this winding displacement is a soft arranging wire.

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