TWI412024B - Wear-proof device for a flexible circuit of an optical disk drive - Google Patents

Abstract

The present invention is to provide a wear-proof device for a flexible circuit of an optical disk drive. The wear-proof device is disposed in a casing with an entrance which allows a tray with bezel at the front end to tray in/out. The flexible circuit includes a fixed part and a moving part. The fixed part is adhered on the casing, and the moving part reversely extends from one end of the fixed part to form a fold end near the entrance. The other end of the moving part connects to the tray which is covered by a protection plate on the bottom. The protection plate forms an arc tail with bigger curve in the rear end. A recess is formed on the bottom of the protection plate and positions above the moving path of the flexible circuit. The width of the recess is litter bigger than the width of the flexible circuit. The recess is formed from the front end to the rear end of the protection plate to prevent the flexible circuit from wearing.

Description

CD player cable anti-wear device

The present invention relates to an optical disk drive, and more particularly to a wire-type anti-wear device for preventing wear of a connection tray and a motherboard as an electrical connection and information transmission in a thin optical disk drive.

Generally, the thin optical disc drive electrically connects the movable tray and the fixed main board with the flexible cable, and provides power transmission control of the electronic components on the tray and read and write information. Since the thickness of the thin optical disc drive is thin and the spacing between the components is small, the tray moves back and forth into or out of the optical disc drive, and the friction cable is easily squeezed. Once the cable skin is damaged, the signal transmission is directly affected, and the reliability of the optical disc drive operation is lowered. .

As shown in FIG. 1 , the thin optical disc drive 1 of the prior art receives a main board 3 and a tray 4 from a hollow casing 2, and the main board and the tray 4 are connected by a row of wires 5 as a connecting cable 5 . There are usually two types, one is FPC cable (ie, Printed Circuit Board, Flexible Printed Circuit), and the other is FFC cable (ie, Flexible Flat Circuit). The FPC cable is thinner but more expensive, and is arranged in a non-overlapping manner. The FFC cable is thicker and arranged in an overlapping manner, but it is cheaper and easier to manufacture, and has a tendency to gradually replace the FPC cable. Taking the flexible cable as an example, the general cable 5 is folded and divided into a fixed portion 6 and a movable portion 7. The fixing portion 6 is located below and adhered to the inner bottom surface of the tray 4, one end is connected to the motherboard 3, and the other end is connected. In the movable part 7, the movable part 7 is located on the upper side, and the other end is connected to the circuit board 8 under the tray 4, and the power supply and signal transmission control of the spindle motor 9 and the read head 10 on the tray 4 are provided, and the other is in the tray 4. A metal protective bottom plate 11 is covered underneath, and moves with the tray 4 to prevent electromagnetic interference of the circuit board 8. The tray 4 can be slid into and out of the casing 2 to play or replace the optical disk 12, and the optical disk 12 is rotated by the spindle motor 9, and the read head 10 is controlled to move back and forth along the radial direction of the optical disk 12, and the optical disk 12 is read and written. The data symbol is transmitted to the motherboard 3 for signal processing via the connection of the circuit board 8 and the cable 5.

For the convenience of carrying, the thin optical disc player 1 used in the notebook computer has a certain thickness limit, and the protective bottom plate 11 under the tray 4 generally slides against the upper portion of the movable portion 7 of the cable 5, and the distance between the two is small. In addition, in order to allow the tray 4 to slide smoothly, the guide rails adopt a loose sliding fit design. Therefore, when the tray 4 is pushed into the thin disc player 1 to be pressed or vibrated, it often causes the rear end of the bottom plate 11 to be protected, and the surface of the movable portion 7 of the cable 5 is touched and scratched, and the wires in the cable 5 are injured for a long time. Affect the signal transmission of the CD player. In order to prevent the rear end of the protective bottom plate 11 from contacting the surface of the movable portion 7 of the flexible cable 5, the prior art further provides a recess 13 on the casing 2 at the front end of the fixing portion 6 of the fixed cable 5 to fold the cable 5. The end is fixed in the recess 13 to increase the distance between the cable 5 and the protective substrate 11.

However, the prior art punches the groove down in the casing, which not only increases the manufacturing cost, but also increases the thickness of the thin optical disk drive invisibly, and does not meet the demand for a thinner optical disk machine to pursue a smaller thickness. At the same time, the groove protruding downward from the prior art also affects the flatness of the surface of the optical disk drive case, and adds difficulty in handling the flatness. Furthermore, although the groove increases the distance between the folded end of the cable and the protective bottom plate, the groove does not affect the range of the casing too large, and can only be set in a limited range, so that the cable is not disposed in the groove. (as indicated by the arrow), it will still be scratched by the protective bottom plate, and it will not completely prevent the cable from being scratched. Therefore, there is still a problem in the anti-wear device of the conventional optical disc drive cable, which is yet to be resolved.

The object of the present invention is to provide an optical disc drive wire anti-wear device, which is provided with an anti-wear device on the protective bottom plate to prevent the wire from being scratched and to avoid affecting the casing, thereby reducing manufacturing difficulty and cost. .

Another object of the present invention is to provide an optical disc drive wire anti-wear device that utilizes a groove in the protective bottom plate to increase the overall spacing between the protective bottom plate and the discharge wire to prevent the wire from being scratched.

Still another object of the present invention is to provide an anti-wear device for a disc drive line, which uses an anti-friction layer at the end of the protective bottom plate to raise the overall distance between the protective bottom plate and the cable to prevent the cable from being scratched.

In order to achieve the object of the foregoing invention, the optical disc drive wire anti-wear device of the present invention is disposed in a casing of an optical disc drive, the casing has an outlet for a tray to enter and exit, a front panel of the tray is connected to a panel, and a row of wires is fixed. The movable part is fixed to the casing, and the movable part is reversely extended from one end of the fixed part to form a folded end, the folded end is fixed near the outlet of the casing, one end of the movable part is connected to the tray, and one protective floor is covered on the tray. Below, the rear end of the protection bottom plate is lifted to form an arc-shaped tail end of an arc-shaped end edge, and a groove is recessed on the bottom surface of the protection bottom plate, and is located above the relative moving path of the wire, and the width of the groove is slightly larger than the width of the wire. The rear end of the arcuate tail of the protective bottom plate is formed to the front end of the panel.

Another embodiment of the optical disc drive wire anti-wear device is disposed in a casing of an optical disc drive, the casing has an outlet for a tray to enter and exit, a row of wires has a fixed portion and a movable portion, and the fixed portion is fixed on the machine The movable portion is oppositely extended from one end of the fixed portion to form a folded end, the folded end is fixed near the outlet of the casing, one end of the movable portion is connected to the tray, and a protective bottom plate is covered under the tray, and the rear end of the protective bottom plate is lifted to form a An arc-shaped tail end of the arc-shaped end, an anti-friction layer is disposed on the bottom surface near the curved tail of the protection bottom plate, and is covered with the curved tail bottom surface, and is located above the relative moving path of the cable.

The technical means and the efficacies of the present invention for achieving the above objects are as follows, and the preferred embodiments are described below with reference to the drawings.

2 and FIG. 3, FIG. 2 is an optical disc drive 20 using the wire anti-wear device of the first embodiment of the present invention, and FIG. 3 is the back surface of the optical disc drive 20. The optical disk drive 20 includes a casing 21, a tray 22, a main board 23, and a wire 24. Mainly the tray 22 is freely slid into and out of the casing 21, one end of the wire 24 is connected to the rear end of the tray 22, and the other end is connected to the main plate 23 provided at the rear end of the casing 21, so that the tray 22 slides into the casing 21 At the same time, the tray 22 and the motherboard 23 fixed in the casing 21 can maintain the transmission and control of the signal.

The casing 21 is formed in a hollow shape, and the front end of the casing 21 has an outlet 25, and a guide rail 26 is disposed on each side, and a motherboard 23 is disposed on the rear side. The two ends of the tray 22 are supported by the guide rails 26, and can be extended or retracted into the casing 21 by the outlet 25 to replace or play the optical disk. A spindle motor 27 is disposed in the center of the tray 22 for rotating the optical disk 28. The tray 22 is further provided with a read head 29 which is movable in the radial direction of the optical disk 28 to read and write data on the optical disk 28. A circuit board 30 is disposed under the tray 22 for controlling the operation of the spindle motor 27 and the read head 29. In addition, a panel 31 is connected to the front end of the tray 22. The lower surface of the circuit board 30 is covered with a metal protective bottom plate 32, which moves with the tray 22 to prevent electromagnetic interference from the precision electronic components on the circuit board 30. At the same time, the rear end of the bottom plate 32 is protected as a curved end edge for preventing the circuit board 30 from being struck, and the curved tail 33 forming a large arc-shaped end side is lifted up. The protection bottom plate 32 is recessed inwardly with a groove 34. The width of the groove 34 is slightly larger than the width of the wire 24, and is located above the relative movement path of the wire 24. The groove 34 is penetrated by one end of the curved tail 33 of the protection plate 32. The other end of the panel 31 is used to constitute the wear preventing device of the present invention.

In addition, the cable 24 of the present invention is a flexible strip-shaped cable. The FFC cable is taken as an example and is basically divided into two parts, a fixed portion 35 and a movable portion 36. One end of the fixing portion 35 is connected to the main board 23, and the remaining fixing portions 35 are directed to the bottom surface of the casing 21 in the direction of the outlet 25, and are located directly below the strip groove 34. The fixing portion 35 can be fixed in a manner such as sticking or riveting, and the flattening length is up to the near exit 25 of the casing 21, depending on the distance the tray 22 moves. The movable portion 36 extends from one end of the outlet portion 25 of the casing 21, and is folded back toward the inside of the casing 21, and is vertically stacked on the fixing portion 35 to form a folded end 37, and the succeeding movable portion 36 is not Fixed, only simply suspended inwardly above the fixing portion 35, and the other end of the last movable portion 36 is connected to the rear side of the tray 22, that is, connected to the circuit board 30 at the bottom of the tray 22, so that the motherboard 23 is connected via a flexible cable. 24, electrically connected to the circuit board 30.

Referring to FIG. 2 again, when the wire 24 of the present invention acts as an anti-wear device, the fixing portion 35 of the wire 24 is flatly fixed to the casing 21 such that the folded end 37 is close to the outlet 25, and the end of the tray 22 pulling the movable portion 36 is connected. Reflexed extension. When the tray 22 is pushed into the casing 21, the retracted cable 24 is guided at the folding end 37 and the tray 22 is pushed back, and the movable portion 36 will lie flat on the fixing portion 35. As shown in Fig. 4, the section near the folded end 37, the strip groove 34 under the protective bottom plate 32 will slide over the upper end of the fold end 37 of the cable, and the recessed groove 34 will keep the protective bottom plate 32 and the wire larger. The spacing, even if the tray is pushed into the casing to be pushed or vibrated, the loosely fitting guide rails allow the protective bottom plate 32 to sink (as indicated by the dashed line), and the strip groove 34 is not allowed to contact the cable folding end 37, at the same time, One end of the curved tail of the protection bottom plate 32 is penetrated to the groove 34 on the other end of the panel, and the protection bottom plate 32 is kept at a certain distance from the wire to prevent the wire behind the folded end 37 from being scratched.

Therefore, the optical disc wire anti-wear device of the present invention can increase the distance between the protection bottom plate and the cable line by preventing a groove anti-wear device on the protective bottom plate, and avoid protecting the bottom plate from scratching the wire from the beginning to the end. . Since the protective bottom plate is located on a metal plate inside the optical disc drive, the electromagnetic interference generated by the electronic components on the tray, especially the circuit board, can be prevented as long as it can cover the underside of the tray, and the present invention is not required for the shape. The groove is recessed in the protection bottom plate, in addition to avoiding the scratch of the cable, which does not affect the original function of the protection plate, and avoids changing the casing of the optical disk drive, thereby reducing manufacturing difficulty and cost.

As shown in Fig. 5, the back side of the optical disk drive 40 using the wire cleaning device of the second embodiment of the present invention. The optical disc drive 40 of the present embodiment includes a casing 41, a tray 42, a main board (not shown), a cable 43, a protective bottom plate 44, and a curved tail 45. Basically, the optical disc drive 20 housing 21 and the tray of the first embodiment. 22. The connecting structure and the actuation of the motherboard 23, the cable 24, the protective bottom plate 32 and the curved tail 33 are the same (see FIG. 2). The main difference is that the anti-wear device provided in the protective bottom plate 44 is an anti-friction device. Grinding layer 46.

The wear layer 46 is disposed near the curved tail 45 at the bottom end of the lower bottom surface of the protective bottom plate 44, covering a portion of the curved tail 45 and directly above the wire 43. The wear layer 46 is coated or adhered to the wear resistant material. The bottom plate 44 is constructed. As shown in FIG. 6, the wire assembly 43 of the present invention functions as a wear preventing device. When the tray 42 is pushed into the casing 41, the retracted cable 43 is guided at the folding end 47 and the tray 42 is pushed backward. The portion 48 will lie flat on the fixing portion 49 in order. The wear-resistant layer 46 covering the bottom surface of the curved tail 45 first contacts the folded end 47. By the cushioning of the large circular arc-shaped tail 45, the wear-resistant layer 46 can be easily slid onto the folded end by reducing the friction of the folded end 47. The movable portion 48 on the 47 causes the protective bottom plate 44 to be pressed against the movable portion 48 by the wear-resistant layer 46. Since the wear-resistant layer 46 has a thickness, the protective bottom plate 44 is raised and the protection behind the wear-resistant layer 46 is provided. The bottom plate 44 is maintained at a distance from the thickness of the wear layer 46 from the movable portion 48 of the wire 43 so that the wire 43 is prevented from coming into contact with the protective bottom plate 44 to prevent scratching.

Therefore, the optical disc wire anti-wear device of the present invention can be provided with an anti-friction layer at the end of the protective bottom plate to raise the overall distance between the protective bottom plate and the cable to prevent the cable from being scratched, and at the same time, the bottom plate is protected. The tail end lifts the curved tail of the larger arc surface to enhance the sliding effect. At the same time, the anti-friction layer of the anti-wear device of the optical disc drive of the present invention can directly cover or adhere to the appropriate thickness of the anti-friction layer on the casing, is easy to manufacture, and saves assembly and manufacturing time, and does not require more surface of the motive shell. The limited thickness of the wear layer can also avoid increasing the thickness of the thin disc drive.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited to the preferred embodiments. All of them are within the scope of the patent application of the present invention.

20. . . First embodiment optical disc player

twenty one. . . cabinet

twenty two. . . tray

twenty three. . . motherboard

twenty four. . . Cable

25. . . Export

26. . . guide

27. . . Spindle motor

28. . . CD

29. . . Read head

30. . . Circuit board

31. . . panel

32. . . Protective floor

33. . . Curved tail

34. . . Slot

35. . . Fixed part

36. . . Activities section

37. . . Folding end

40. . . Second embodiment optical disc player

41. . . cabinet

42. . . tray

43. . . Cable

44. . . Protective floor

45. . . Curved tail

46. . . Wear layer

47. . . Folding end

48. . . Activities section

Figure 1 is a side cross-sectional view of a prior art optical disk drive.

Figure 2 is a perspective view of an optical disc drive using the wire anti-wear device of the first embodiment of the present invention.

Figure 3 is a rear perspective view of the optical disk drive of the first embodiment of the present invention.

Figure 4 is a cross-sectional view showing the vicinity of the folded end of the cable according to the first embodiment of the present invention.

Figure 5 is a cross-sectional side view showing the second embodiment of the present invention.

Figure 6 is a schematic side cross-sectional view showing an optical disk drive according to a second embodiment of the present invention.

20. . . First embodiment optical disc player

twenty two. . . tray

30. . . Circuit board

31. . . panel

32. . . Protective floor

33. . . Curved tail

34. . . Slot

36. . . Activities section

Claims (10)

An optical disc drive wire anti-wear device is disposed in a casing of an optical disc drive, and the casing has an outlet for a tray to enter and exit, comprising: a row of wires having a fixing portion and a movable portion, wherein the fixing portion is fixed to the casing The movable portion is reversely extended from one end of the fixed portion to form a folded end, the folded end is fixed near the outlet of the casing, one end of the movable portion is connected to the tray; a protective bottom plate covers the bottom of the tray; and a groove is recessed on the protective bottom plate The bottom surface is located above the relative movement path of the cable, and is formed by the rear end of the protection substrate to the front end. The optical disc drive wire anti-wear device according to claim 1, wherein the folded end of the movable portion is superposed on the fixed portion to form an FFC cable. The optical disc drive wire anti-wear device according to claim 1, wherein the rear end of the protective bottom plate is lifted to form an arc-shaped tail end of an arc-shaped end. The optical disc drive wire anti-wear device according to claim 1, wherein the slot has a width slightly larger than a width of the cable. The optical disc drive wire anti-wear device according to claim 1, wherein the protective bottom plate has a concave groove to maintain a larger spacing between the protective bottom plate and the wire. An optical disc drive wire anti-wear device is disposed in a casing of an optical disc drive, and the casing has an outlet for a tray to enter and exit, comprising: a row of wires having a fixing portion and a movable portion, wherein the fixing portion is fixed to the casing The movable portion is reversely extended from one end of the fixed portion to form a folded end, the folded end is fixed near the outlet of the casing, and one end of the movable portion is connected to the tray; a protective bottom plate covering the bottom of the tray, the tail end is lifted up to form an arc-shaped curved tail; and an anti-friction layer is disposed on the bottom surface near the curved tail of the protective bottom plate and above the relative moving path of the wire. The optical disc drive wire anti-wear device according to claim 6, wherein the wear-resistant layer covers the curved tail bottom surface. The optical disc drive wire anti-wear device according to claim 7, wherein the wear-resistant layer covers the curved tail bottom surface of the wire above the relative movement path. The optical disc drive wire anti-wear device according to claim 6, wherein the wear-resistant layer is coated or pasted with a wear-resistant material. The optical disc drive wire anti-wear device according to claim 6, wherein the wear-resistant layer has a thickness, and the protective bottom plate is raised to maintain the thickness distance between the protective bottom plate and the wire.