JP3920844B2 - Disc transfer member - Google Patents

Description

  The present invention relates to a disk transfer member for transferring a disk-shaped recording medium such as an optical disk or a magneto-optical disk, and more particularly to a disk transfer member having a long wear resistance life.

  Conventionally, recording and / or reproducing information signals using a disc-shaped recording medium called an optical disc such as a CD (compact disc) or a CD-ROM (read-only memory) or a magneto-optical disc (OD: optical magnetic disc). A disc recording and / or playback device for performing the above is provided.

  In order to mount a disc on the disc recording and / or reproducing apparatus, a disc inlet / outlet opened in the shape of a horizontally long slit is provided on the front surface of the casing of the disc recording / reproducing device. In order to load and unload the optical disk, which is a disk-shaped recording medium loaded and unloaded from the disk slot, a disk transfer mechanism is provided inside the disk slot of the housing. The disc transport mechanism has a transport member that applies insertion force and ejection force to the optical disc.

Such a disk recording and reproducing apparatus and its transfer member are disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-304798 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2002-304799 (Patent Document 2).
FIG. 10 is a cross-sectional view showing a state when the transfer roller 100 and the disk 110 disclosed in Patent Document 1 are transferred. Referring to FIG. 10, a conventional transfer roller 100 includes an upper cylindrical portion 101, a lower cylindrical portion 102, and a taper that forms a V-shaped groove provided between the upper cylindrical portion 101 and the lower cylindrical portion 102. And a shaft 105 that is the center of rotation of the transfer roller 100 via a shaft mounting hole 104 provided in the center of the transfer member 100. In the disk 110, the edges 111a and 111b, which are outer peripheral edges on one side of the disk, are pressed against the tapered portion 103 of the transfer roller 100, and the outer peripheral end on the other side of the disk facing in the diametrical direction is transferred to the other not shown. It is held in a V-shaped groove of the roller and conveyed to a predetermined position.
Japanese Patent Application Laid-Open No. 2002-304798 (FIGS. 12, 46 and 47 and descriptions related thereto) JP 2002-304799 A (Claim 3, FIGS. 12, 46 and 47 and related descriptions)

  A conventional disk transfer member for a disk recording and reproducing apparatus is configured as described above. The transfer member is composed of a grooved roller in which U-shaped or V-shaped grooves are continuous in the circumferential direction, and the portion is in contact with the upper and lower edges of the disk to transfer the disk, so that the disk is easily worn. In addition, due to this, there is a problem that a change in conveying force is large, and scraps due to wear adhere to the disk.

  As described above, the reason why the wear is great is that the edge of the disk is in contact with the roller taper portion in order to secure the conveying force. The reason why the conveying force increases when the edge of the disk is brought into contact with the tapered portion of the transfer roller is that the amount of deformation of the rubber is large. This means that the rigidity of the rubber is reduced, that is, the conveying force is increased because the rubber is conveyed with soft rubber. Therefore, if the hardness of the rubber constituting the transfer member is increased simply to make it difficult to wear, there arises a problem that the conveying force decreases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a transfer member for transferring a disc that can reduce the wear of rubber while ensuring the conveying force of the disc. .

  The disc transfer member used for holding and transferring the outer peripheral end of the disc according to the present invention includes an outer peripheral surface that linearly contacts the outer peripheral surface of the disc in a line extending in the thickness direction, and a center that receives the rotating shaft. Including holes.

  Preferably, the outer peripheral surface has a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disk.

  More preferably, the outer peripheral surface includes an upper and lower end portion and a central portion sandwiched between the upper and lower end portions, the upper and lower end portions of the outer peripheral surface protrude in a radial direction from the central portion of the outer peripheral surface, and the upper and lower end portions of the outer peripheral surface are Abuts on the outer peripheral surface of the disc.

  More preferably, the upper and lower end portions of the outer peripheral surface have a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disk.

  More preferably, the outer peripheral surface includes an upper and lower end portion and a central portion sandwiched between the upper and lower end portions, the central portion of the outer peripheral surface protrudes in a radial direction from the upper and lower end portions of the outer peripheral surface, and the central portion of the outer peripheral surface is Abuts on the outer peripheral surface of the disc.

  More preferably, the central portion of the outer peripheral surface has a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disk.

  Note that the outer peripheral surface of the disc transfer member abuts only a part of the outer peripheral surface of the disc.

  According to the present invention, the disc transport member used for holding and transporting the outer peripheral edge of the disc is an outer peripheral surface that linearly contacts the outer peripheral surface of the disc in the thickness direction. Since it abuts, it is possible to prevent large wear as in the prior art.

  Preferably, the outer peripheral surface has a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disk. Since a part of the outer peripheral surface comes into contact with the outer peripheral surface of the disk to transport the disk, it is possible to provide a transport member for transporting the disk that can reduce the wear of rubber while ensuring the transport force of the disk.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the relationship between the cross-sectional shape of a transfer roller 10 as a transfer member according to the first embodiment of the present invention and one end of a disk 70 transferred by the transfer roller 10. The other end (not shown) on the opposite side of the disk 70 in the diametrical direction is similarly held by the transfer roller 10 shown in FIG.

  FIG. 2 is a cross-sectional view (A) and a side view (B) of the central cylindrical portion of the transfer roller 10 shown in FIG. Sectional drawing (A) shows the cross section in AA of a side view (B).

  1 and 2, a transfer roller 10 according to an embodiment of the present invention includes an upper cylindrical portion 11, a lower cylindrical portion 15, a central cylindrical portion 13, an upper cylindrical portion 11 and a central cylindrical portion. 13 includes an upper taper portion 12 that connects to the central cylinder portion 13, and a lower taper portion 14 that connects the central cylindrical portion 13 and the lower cylindrical portion 15. The central portion 18 engages with a shaft 80 for rotating the transfer roller 10. Has been.

  In this embodiment, not the edges of the upper and lower ends of the outer periphery of the disk 70 but the outer peripheral surface 71 of the disk 70 is conveyed while being in line contact with lines extending in the thickness direction from both sides in the diameter direction of the disk 70. As a result, there is no increase in wear of the transport unit as in the prior art.

  FIG. 3 is a view showing a modification of the transfer roller 10 shown in FIGS. 1 and 2, wherein (A) is a cross-sectional view of the central cylindrical portion (A-A cross section in FIG. B), and (B) is It is the side view.

  As described in the background art, in order to secure the conveyance force, the rigidity of the disk conveyance unit must be reduced. In the shape shown in FIGS. 1 and 2, since the outer peripheral surface 71 of the disk 70 is in surface contact with the outer peripheral surface of the transfer roller 10, the rubber is hardly deformed when the disk is transported. As a result, the conveyance force may be reduced. FIG. 3 shows a transfer roller considering this point.

Referring to FIG. 3, the transfer roller 16 according to the modification, the central cylindrical portion 13 has become a gear shape having the recess 19 and the convex portion 17. The outer peripheral surface 71 of the disc 70 by the convex portion 17 of the gear I mourn. Since the convex portion 17 has low rigidity, the convex portion is deformed when the disk is transported, and the transport force can be increased.

  Here, the rubber hardness constituting the transfer rollers 10 and 16 is 30 to 60 degrees, and the total length in the axial direction is preferably 4 to 8 mm.

  The dimension in the radial direction is not particularly limited, but the diameter of the disk transport surface is preferably about 4 mm to 8 mm. As materials, various materials such as EPDM, NBR, butyl, CR (chloroprene rubber), and silicon are used on a case-by-case basis.

  FIG. 4 is a diagram showing the relationship between the cross-sectional shape of the transfer roller 20 according to the second embodiment of the present invention and one end of the disk 70 transferred by the transfer roller 20. The other end (not shown) of the disk 70 is also held by the transfer roller 10 shown in FIG. 4 as in the case of FIG.

  FIG. 5 is a view showing a cross-sectional view (a cross-sectional view of a portion indicated by A-A in FIG. 4A) and a side view (B) of the central cylindrical portion of the transfer roller 20 shown in FIG.

  4 and 5, the transfer roller 20 according to the embodiment of the present invention includes an upper cylindrical portion 21, a lower cylindrical portion 25, a central step portion 23, an upper cylindrical portion 21 and a central step portion 23. And a lower taper portion 24 connecting the central step portion 23 and the lower cylindrical portion 25. The central step portion 23 includes first central cylindrical portions 26 and 28 provided adjacent to the upper and lower tapered portions 22 and 24, each having a diameter smaller than the minimum diameter of the upper and lower tapered portions 22 and 24, and the central portion. A central part second cylindrical part 27 formed between the first cylindrical parts 26 and 28 and having a diameter smaller than that of the central part first cylindrical part 26 is included. The transfer roller 20 is engaged at its central portion 18 with a shaft 80 that rotates the transfer roller 20.

  In this embodiment, as shown in FIG. 4, the upper and lower ends of the disc outer peripheral portion 71 abut against the central first cylindrical portions 26 and 28 of the transfer roller 20 and the disc 70 is conveyed. Also in this case, since the entire surface of the disk outer peripheral portion 71 does not contact the transfer roller and the rigidity of the central first cylindrical portions 26 and 28 is low, the central first cylindrical portions 26 and 28 are transported when the disk 70 is transported. Can be deformed and the conveying force can be increased.

  FIG. 6 is a view showing a modification of the transfer roller 20 shown in FIGS. 4 and 5. 6A is a cross-sectional view (cross-section AA in FIG. B) of the central second cylindrical portion, and FIG. 6B is a side view thereof.

  Referring to FIG. 6, the transfer roller 30 according to this modified example has a gear shape in which the central first cylindrical portions 26 and 28 in FIG. 4 and FIG. 5 are composed of a concave portion 31 and a convex portion 32. The outer peripheral surface 71 of the disk 70 is sandwiched by the convex portion 32. Since the convex portion 32 has low rigidity, the convex portion 32 is deformed when the disc is transported, and the transport force can be increased.

  Since other parts are the same as those in FIGS. 4 and 5, the same reference numerals are given to the same parts and the description thereof is omitted.

  FIG. 7 is a view showing the relationship between the cross-sectional shape of the transfer roller 40 according to the third embodiment of the present invention and one end portion of the disk 70 transferred by the transfer roller 40. The other end portion (not shown) of the disk 70 is also held by the transfer roller 40 shown in FIG. 7, as in the case of FIG.

  FIG. 8 is a view showing a cross-sectional view (a cross-sectional view of a portion indicated by AA in FIG. 7A) and a side view (B) of the central cylindrical portion of the transfer roller 40 shown in FIG.

  7 and 8, transfer roller 40 according to this embodiment connects upper cylindrical portion 41, lower cylindrical portion 45, central concave portion 43, upper cylindrical portion 41 and central concave portion 43. The upper taper part 42 and the lower taper part 44 which connects the center recessed part 43 and the lower cylindrical part 45 are included. The central concave portion 43 is smaller in diameter than the minimum diameter of the upper and lower taper portions 42 and 44, and the central first cylindrical portions 46 and 48 provided adjacent to the upper and lower taper portions 42 and 44, respectively. A central second cylindrical portion 47 formed between the cylindrical portions 46 and 48, having a diameter smaller than the minimum diameter of the upper and lower tapered portions 42, 44 and larger than the central first cylindrical portions 46, 48; including. The transfer roller 40 is engaged with the shaft 80 at its central portion 18.

  In this embodiment, as shown in FIG. 7, the disk outer peripheral part 71 abuts against the central second cylindrical part 47 of the transfer roller 40 and the disk 70 is conveyed. Also in this case, the entire surface of the disk outer peripheral portion 71 does not contact the circumferential surface of the transfer roller, and the rigidity of the central second cylindrical portion 47 is low. Can be deformed and the conveying force can be increased.

  FIG. 9 is a view showing a transfer roller 50 which is a modification of the transfer roller shown in FIGS. 9A is a cross-sectional view (cross section AA in FIG. B) of the central second cylindrical portion 47, and FIG. 9B is a side view thereof.

  Referring to FIG. 9, in the transfer roller 50 according to this modification, the central second cylindrical portion 47 in FIGS. 7 and 8 has a gear shape composed of a concave portion 56 and a convex portion 57. Since the rigidity of the gear is low, the convex portion 57 of the gear comes into contact with the outer peripheral surface 71 of the disk 70. As a result, the convex portion 57 is deformed when the disk is transported, and the transport force can be increased.

  Since the other parts are the same as those in FIGS. 7 and 8, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

  In the above embodiment, the example has been described in which the central cylindrical portion of the transfer roller is divided into the upper, central, and lower stages and contacts the outer peripheral surface of the disc at the upper and lower portions or the central portion. You may make it contact | abut to a part of outer peripheral surface of a disk divided into 4 steps or more.

  In the above-described embodiment, the case where the transfer roller is engaged with the rotation shaft at the center thereof has been described.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  According to the present invention, the disk is transported while being in line contact with the outer peripheral surface of the disk in a line extending in the thickness direction thereof, so that the wear of the rubber can be reduced while ensuring the transport force of the disk. A transfer member for transfer can be provided, which can be advantageously used as a disk transfer roller.

It is sectional drawing in the transfer state of the transfer roller which concerns on 1st Embodiment of this invention, and a disk. It is sectional drawing of the transfer roller which concerns on 1st Embodiment. It is the partial cross section figure and side view of the transfer roller which concern on the modification of 1st Embodiment. It is sectional drawing in the transfer state of the transfer roller and disc which concerns on 2nd Embodiment of this invention. It is the partial cross section figure and side view of the transfer roller which concern on 2nd Embodiment. It is the partial cross section figure and side view of the transfer roller which concern on the modification of 2nd Embodiment. It is sectional drawing in the transfer state of the transfer roller and disc which concerns on 3rd Embodiment of this invention. It is a partial cross section figure and side view of the transfer roller which concerns on 3rd Embodiment. It is the partial cross section figure and side view of the transfer roller which concern on the modification of 3rd Embodiment. It is sectional drawing in the transfer state of the conventional transfer roller and a disk. It is the partial cross section figure and side view of the conventional transfer roller.

Explanation of symbols

10, 16, 20, 30, 40, 50 Transfer roller, 11, 21, 41, 51 Upper cylindrical part, 12, 22, 42 Upper tapered part, 13, 33 Central cylindrical part, 14, 24, 44 Lower tapered part, 15, 25, 45 Lower cylindrical part, 18, 32, 57 Convex part, 19, 31, 56 Concave part

Claims (6)

A disc transfer member having an upper cylindrical portion, a lower cylindrical portion, and a central cylindrical portion that is disposed between the upper cylindrical portion and the lower cylindrical portion, and the outer peripheral surface of the disc contacts ;
The upper cylindrical portion, the lower cylindrical portion, and the central cylindrical portion are integrally formed of the same material, and the outer peripheral surface of the disk is in line contact with the outer peripheral surface of the central cylindrical portion in the axial direction .
The outer peripheral surface of the central cylindrical portion has a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disc. . A disc transfer member having an upper cylindrical portion, a lower cylindrical portion, and a central cylindrical portion that is disposed between the upper cylindrical portion and the lower cylindrical portion, and the outer peripheral surface of the disc contacts ;
The upper cylindrical portion, the lower cylindrical portion, and the central cylindrical portion are integrally formed of the same material, and the outer peripheral surface of the disk is in line contact with the outer peripheral surface of the central cylindrical portion in the axial direction .
The outer peripheral surface of the central cylindrical portion includes said top and bottom portions sandwiched by the central portion and the upper and lower ends,
Upper and lower end portions of the outer peripheral surface protrude in a radial direction from a central portion of the outer peripheral surface,
A disk transfer member in which upper and lower ends of the outer peripheral surface are in contact with an outer peripheral surface of the disk. The upper and lower end portions of the outer peripheral surface of the central cylindrical portion have a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions contact the outer peripheral surface of the disk. The disk transfer member according to claim 2, which contacts the disk transfer member. A disc transfer member having an upper cylindrical portion, a lower cylindrical portion, and a central cylindrical portion that is disposed between the upper cylindrical portion and the lower cylindrical portion, and the outer peripheral surface of the disc contacts ;
It said upper cylindrical portion, a lower cylindrical portion, and with a central cylindrical portion is integrally molded of the same material, the outer peripheral surface of the disk is in line contact in the axial direction on the outer peripheral surface of the central cylindrical portion,
The outer peripheral surface of the central cylindrical portion includes an upper and lower end portion and a central portion sandwiched between the upper and lower end portions,
The central portion of the outer peripheral surface protrudes in the radial direction from the upper and lower end portions of the outer peripheral surface,
A disc transfer member in which a central portion of the outer peripheral surface abuts on an outer peripheral surface of the disc. The central portion of the outer peripheral surface of the central cylindrical portion has a gear shape having a plurality of convex portions protruding in the radial direction at regular intervals in the circumferential direction, and the plurality of convex portions abut on the outer peripheral surface of the disk. The disk transfer member according to claim 4 . A disc transfer member having an upper cylindrical portion, a lower cylindrical portion, and a central cylindrical portion that is disposed between the upper cylindrical portion and the lower cylindrical portion, and the outer peripheral surface of the disc contacts;
When the upper cylindrical portion, the lower cylindrical portion, and the central cylindrical portion are integrally formed of the same material, and the outer peripheral surface of the central cylindrical portion abuts a part in the circumferential direction of the outer peripheral surface of the disk,
The outer peripheral surface of the disc is in line contact with the outer peripheral surface of the central cylindrical portion in the axial direction,
The disc transfer member, wherein an outer peripheral surface of the central cylindrical portion is in contact with only a part in the axial direction at a part of the outer peripheral surface of the disc in the circumferential direction .

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