JP2009205749A - Disk playback device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk playback device capable of performing appropriate disk insertion/ejection in a gear of a last stage configured integrally with a convey roller shaft irrespective of the arrangement of a gear one stage before the last stage for transmitting rotational force. <P>SOLUTION: The disk playback device (1) is provided with a convey roller (15) for conveying a disk (2), a first gear (20) coupled with the convey roller to rotate the convey roller, a second gear (22) engaged with the first gear, a third gear (24) configured to transmit driving force to the first gear via the second gear and to rotate in a direction opposite that of the second gear, and a transmission member (30) connected to the third gear and configured to transmit, in order to cancel the force of moving the first gear by rotation of the second gear, force generated by rotation of the third gear to the first gear. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disk reproducing apparatus, and more particularly to a disk reproducing apparatus having a disk insertion / ejection mechanism.

  2. Description of the Related Art A disk reproducing apparatus having a disk insertion / ejection mechanism that rotates a conveyance roller by a motor, inserts a disk into the apparatus by forward rotation of the conveyance roller, and ejects the disk from the apparatus by reverse rotation of the conveyance roller is known. (For example, Patent Document 1).

  In such a system in which the disk is inserted and ejected by the transport roller, the rotational force of the transport roller is transmitted from the motor to the final stage gear formed integrally with the transport roller shaft through the gear train. Also, since the transport roller has a structure that is retracted from the disk except when the disk is inserted and ejected, the transport roller is supported by a slide lever or the like so as to be movable between the insertion / ejection position and the retracted position. Yes.

  However, if the gear of the last stage that transmits the rotational force to the final stage gear integrally coupled with the conveying roller shaft is poorly arranged, the final stage gear is transmitted when the rotational force is transmitted to the final stage gear. There is a problem in that an appropriate insertion / ejection force cannot be obtained due to the movement of the gears and the conveyance rollers escaping from the insertion / ejection position. On the other hand, when transmitting the rotational force to the final stage gear, the final stage gear moves and the transport roller receives a force in the direction of crimping the disk further from the insertion / ejection position. There was a problem that damage occurred.

JP 2006-332461 A

  Accordingly, an object of the present invention is to provide a disc reproducing apparatus that can solve the above-mentioned problems.

  Further, according to the present invention, it is possible to appropriately insert and eject the disk regardless of the arrangement of the gear preceding the last stage for transmitting the driving force to the last stage gear integrally coupled with the transport roller shaft. An object of the present invention is to provide a disc reproducing apparatus that can be used.

  A disc reproducing apparatus according to the present invention includes a transport roller for transporting a disc, a first gear coupled to the transport roller and rotating the transport roller, a second gear meshed with the first gear, A driving force is transmitted to one gear through a second gear and is connected to a third gear that rotates in the opposite direction to the second gear, and the third gear is rotated, and the first gear moves as the second gear rotates. In order to cancel out the force to be attempted, a transmission member for transmitting the force generated by the rotation of the third gear to the first gear is provided.

  The disk reproducing apparatus according to the present invention is coupled to a second gear that rotates in the same direction as the first gear, and a force generated by the rotation of the second gear to cancel the force that the first gear tries to move. It has the transmission member for transmitting to a said 1st gearwheel.

  According to the disk reproducing apparatus of the present invention, the final stage gear is maintained at an appropriate position by the transmission member, so that the driving force is transmitted to the final stage gear integrally coupled with the transport roller shaft. Regardless of the arrangement of the gears one stage before the final stage, it has become possible to insert and eject appropriate discs.

  Hereinafter, a disc reproducing apparatus according to the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a schematic top view of the disk reproducing apparatus 1.

  The disk playback device 1 is a device for playing back (and / or recording) optical information from a disk 2 such as a CD, DVD, BD, HD-DVD, or MD, and includes a frame 10, an upper chassis 12, and an upper chassis. The disc 2 is interposed between the disc-shaped disc guides 13-1 and 13-2 and the disc guides 13-1 and 13-2 having elasticity, which are rotatably arranged in the 12 openings 12-1 and 12-2. The conveying roller 15, the conveying roller holder 17, the support shaft 18 provided in the frame 10, and the disc 2 are used for inserting and ejecting the disc (in the direction of arrow A1) and ejecting (in the direction of arrow A2). And the like.

  The conveyance roller 15 is configured to be able to perform forward and reverse rotation by applying a rotational force from a drive motor (not shown) to the first gear 20 coupled to the conveyance roller 15 via another gear. Yes. Further, the transport roller 15 is rotatably supported by the transport roller holder 17.

  The transport roller holder 17 supports the transport roller 15 movably between a transport position for inserting and ejecting the disk 2 and a retreat position when the disk 2 is not inserted and ejected with the support shaft 18 as a fulcrum. ing.

  2 to 4 are diagrams showing the drive mechanism 100 of the transport roller 15. 2 is a view of the drive mechanism 100 seen from the arrow B in FIG. 1, FIG. 3 is a view showing a state where the lever 30 and the gear cover 40 are removed from FIG. 2, and FIG. 4 is a perspective view of the drive mechanism 100. It is. 2 and 4 show a state where the gear cover 40 is seen through. FIG. 5 is a perspective view of the lever 30, and FIG. 6 is a perspective view of the gear cover 40.

  As shown in the drawing, the first gear 20 that drives the transport motor 15 is meshed with the second gear 22, and the second gear 22 is meshed with the third gear 24 connected to the drive motor (not shown). Yes. The first gear 20 has a first shaft 21 formed integrally with the gear, the second gear 22 has a second shaft 23 formed integrally with the gear, and the third gear is a gear. It has the 3rd axis | shaft 24 formed integrally. As shown in FIG. 3, when the third gear 24 rotates in the direction of arrow C1, the second gear 22 rotates in the direction of arrow C2, and the first gear 20 rotates in the direction of arrow C1. As the first gear 20 rotates in the direction of the arrow C1, the disk 2 is held between the disk guides 13-1 and 13-2 and the conveying roller 15, and the inside of the disk reproducing device 1 is directed in the direction of the arrow A1. Inserted into.

  The transport roller guide 17 is supported by a support shaft 18 so as to be movable in the direction of arrow D. The transport roller guide 17 is always biased by the first spring 50 in the direction in which the transport roller 15 presses the disk 2.

  As shown in FIG. 5, the lever 30 has a V-shaped stepped groove 31 and a first fitting portion 32. The lever 30 is engaged with the first shaft 21 so that the first shaft 21 of the first gear 20 can slide along the stepped groove 31, and the third gear is engaged by the first fitting portion 32. It is positioned by fitting with the 24 third shaft 25. The lever 30 is formed and arranged so as not to contact the second gear 22.

  As shown in FIG. 6, the gear cover 40 includes positioning members 41 to 44, an opening 45, a second fitting portion 46, a third fitting portion 47, and a side portion 48. The gear cover 40 is positioned by fitting the positioning members 41 to 44 into the protrusions 26-1 to 26-4 arranged on the frame body 10, and the frame is formed by screws 61 to 64 and corresponding screw holes 71 to 74. It is fixed to the body 10. The opening 45 of the gear cover 40 corresponds to the position of the stepped groove 31 of the lever 30 and is configured such that the first shaft 21 of the first gear 20 does not contact the gear cover 40. The second fitting portion 46 of the gear cover 40 is disposed so as to be fitted with the second shaft 23 of the second gear. Further, the third fitting portion 47 provided on the side portion 48 formed in a part of the gear cover 40 is fitted with the third shaft 25 of the third gear 24.

  FIG. 7 is a diagram illustrating a relationship among the third gear, the lever, and the gear cover.

  FIG. 7A is a view for explaining the relationship between the third gear 24, the first fitting portion 32 of the lever 30, and the third fitting portion 47 of the gear cover 40 described above, and FIG. 7B and FIG. () Is a figure for demonstrating another structure.

  As shown in FIG. 7A, the first fitting portion 32 of the lever 30 is fitted to the third shaft 25 of the third gear 24, but the first fitting portion of the third gear 24 and the lever 30 is left as it is. The crimping force between the gears 32 is not sufficient, and the rotational force is not sufficiently transmitted to the lever 30 according to the rotation of the gear 24. Therefore, the side portion 48 of the gear cover 40 is made springy so that the side portion 48 laterally presses the first fitting portion 32 of the lever 30 so that the frictional force between the third gear 24 and the lever 30 is increased. Thus, the rotational force of the third gear 24 is configured to be sufficiently transmitted to the lever 30.

  In FIG. 7B, the side portion 48 of the gear cover 40 is not provided with a spring property. Instead, a gap member 80 is disposed between the third gear 24 and the first fitting portion 32 of the lever 30. Yes. The gap member 80 is made of a material having a high friction coefficient such as a nonwoven fabric or rubber. The third gear 24 and the first fitting portion 32 of the lever 30 are pressure-bonded by the gap material 80, and the frictional force between the third gear 24 and the lever 30 is increased, so that the rotational force of the third gear 24 is applied to the lever 30. Fully communicated. The configuration shown in FIG. 7B can be used instead of the configuration shown in FIG.

  In FIG. 7C, the side portion 48 of the gear cover 40 is not provided with a spring property. Instead, a spring 81 is provided between the first fitting portion 32 of the lever 30 and the third fitting portion 47 of the gear cover 40. It is arranged. The third gear 24 and the first fitting portion 32 of the lever 30 are pressure-bonded by the spring 81, and the frictional force between the third gear 24 and the lever 30 increases, so that the rotational force of the third gear 24 is sufficient for the lever 30. Will be transmitted to. The configuration shown in FIG. 7C can be used instead of the configuration shown in FIG.

  FIG. 8 is a diagram illustrating another relationship between the third gear, the lever, and the cover.

  In FIG. 8A, a burring 33 is provided in the first fitting portion 32 of the lever 30, and the burring 33 of the first fitting portion 32 of the lever 30 is engaged with the third shaft 25 of the third gear 24. . It is expected that the first fitting portion 32 of the lever 30 is rough when the first fitting portion 32 is just a hole, and the third shaft 25 of the third gear 24 is scraped by the first fitting portion 32 of the lever 30 over time. Is done. By providing the burring 33 in the first fitting portion 32 of the lever 30, the contact area between the first fitting portion 32 of the lever 30 and the third shaft of the third gear 24 is increased, and the rotational force of the third gear 24 is more efficiently obtained. Can be transmitted to the lever 30 and the durability of the apparatus can be provided. The configuration of FIG. 8A can be employed in addition to the configuration shown in FIGS. 7A to 7C.

  In FIG. 8 (b), as shown in FIG. 8 (a), a burring 33 is provided in the first fitting portion 32 of the lever 30, the direction of the burring 33 is convex toward the third gear 24, and further, the third gear 24 is provided with a relief groove 83, and the burring 33 is accommodated in the relief groove 83. By adopting the configuration shown in FIG. 8B, the contact area between the first fitting portion 32 of the lever 30 and the third shaft of the third gear 24 is further increased and more efficiently than in the configuration shown in FIG. 8A. The rotational force of the third gear 24 can be transmitted to the lever 30. If the direction of the burring 33 is convex toward the third fitting portion 47 side of the gear cover 40, the burring 33 is inserted into the third fitting portion 47 of the gear cover 40, and the burring 33 and the gear cover 40 are This is not preferable because the rotational force transmitted from the third gear 24 to the lever 30 is reduced by the frictional force. The configuration of FIG. 8B can be employed in addition to the configuration shown in FIGS. 7A to 7C.

  FIG. 9 is a diagram showing still another configuration of the third gear.

  In FIG. 9, the lever 30 is made of a magnetic material, and the magnet 84 is embedded in the third gear 24. By attracting the magnet 84 and the lever 30 by magnetic force, the rotational force of the third gear 24 can be transmitted to the lever 30 more efficiently. The configuration of FIG. 9 can be employed in addition to the configurations shown in FIGS. 7A to 7C, FIGS. 8A and 8B.

  Hereinafter, the operation of the transport roller driving mechanism 100 in the disc reproducing apparatus 1 according to the present invention will be described.

  As shown in FIG. 3, when the third gear 24 rotates in the direction of arrow C1, the second gear 22 rotates in the direction of arrow C2, and the first gear 20 rotates in the direction of arrow C1. As the first gear 20 rotates in the direction of the arrow C1, the disk 2 is held between the disk guides 13-1 and 13-2 and the conveying roller 15, and the inside of the disk reproducing device 1 is directed in the direction of the arrow A1. Inserted into. At this time, when the first gear 20 receives the rotational force in the direction of the arrow C <b> 2 from the second gear 22, the first gear 20 also receives a force that can be moved in the direction of the arrow E. When the first gear 20 is moved in the direction of arrow E across the spring 50, the transport roller 15 moves away from the disk 2, and the disk 2 may not be inserted properly. There is sex.

  Therefore, in the present invention, the lever 30 engaged with the third gear 24 is used to eliminate the influence of the force in the direction of the arrow E that the first gear 20 receives from the second gear 22. That is, as the third gear 24 rotates as indicated by an arrow C3 (see FIG. 3), the lever 30 is transmitted with a force in the direction of the arrow F (see FIG. 2). By engaging the stepped groove 31 of the lever 30 and the first shaft 21 of the first gear 20, the force in the direction of the arrow E is canceled by the force in the direction of the arrow F so that the first gear 20 does not move. It is configured. Therefore, the transport roller 15 can insert the disc satisfactorily without being separated from the insertion position of the disc 2.

  In the above description, the disk is inserted, but the same applies when the disk is ejected. That is, when the third gear 24 rotates in the direction opposite to the arrow C3, the second gear 22 rotates in the direction opposite to the arrow C2. Accordingly, the first gear 20 is rotated in the direction opposite to the arrow C1 and receives a force in the direction opposite to the arrow E. That is, at this time, the transport roller 15 receives a force that moves in the direction in which the disk 2 is pressed further, which may cause damage to the disk. However, since the lever 30 engaged with the third gear 24 receives a force that moves in the direction opposite to the arrow F at this time, the force to move the first gear 20 further toward the disk rotates the lever. The first gear 20 is configured not to move by offsetting the force to be caused. Therefore, the transport roller 15 can discharge the disk satisfactorily without being separated from the discharge position of the disk 2.

  In this way, among the gears that rotate the first gear 20 that is the final stage gear that drives the conveying roller 15, the gear that rotates in the same direction as the first gear 20 (or the second gear meshed with the first gear 20). By providing a member (for example, a lever 30) that transmits a rotational force that receives a rotational force from the gear 22 (for example, the third gear 24) that rotates in the opposite direction to the gear 22 to the first gear 20, the disk can be configured with a simple configuration. It has become possible to perform the insertion / ejection of the water well.

  FIG. 10 is a diagram for explaining the function of the stepped groove 31 of the lever 30.

  FIG. 10A shows an insertion / ejection position (disc 2) for the transport roller 15 to insert and eject the disc 2 in the drive mechanism 100 of the disc reproducing apparatus 1 according to the present invention having the lever 30 having the stepped groove 31. FIG. 10B shows a state in which the conveying roller 15 is a disk in the drive mechanism 100 of the disk reproducing apparatus 1 according to the present invention including the lever 30 having the stepped groove 31. The state which exists in the retracted position which does not insert / extract 2 is shown.

  On the other hand, FIG. 10C shows an insertion / ejection position (the disc 2 exists) for the conveyance roller 15 to insert and eject the disc 2 in the drive mechanism 100 ′ having the lever 200 having the linear groove 201. FIG. 10D shows a state where the conveying roller 15 is in a retracted position where the disk 2 is not inserted and ejected in the driving mechanism 100 ′ having the lever 200 having the linear groove 201. Indicates the state.

  10 (a) and 10 (b) is compared with FIGS. 10 (c) and 10 (d), when the lever groove is stepped, the movement of the lever is based on the movement of the position of the conveying roller 15. It is understood that the distance is short. That is, when the groove is not stepped, the lever 200 moves greatly when the transport roller 15 moves from the insertion / ejection position to the retracted position.

  Since the lever is engaged with the third gear 24 and receives a driving force for maintaining the first gear 20 in a predetermined position from the third gear 24, the positional relationship between the third gear and the lever is changed as much as possible. It is desirable to keep it in a state where it is not. For example, when the positional relationship between the lever 200 and the third gear 24 is frequently moved as shown in FIGS. 10C and 10D, the spring of the side plate 48 that laterally presses the lever 200 against the third gear 24. As a result, there is a possibility that the rotational force of the third gear 24 is not transmitted to the lever 200 well over time.

  10A and 10B show the outer edge 50 of the lever 30 with a dotted line. Thus, the lever 30 of the disc reproducing apparatus 1 according to the present invention has an outer shape that does not come into contact with the second gear 22 that is the gear one stage before the final stage. By configuring in this way, it is possible to prevent the lever 30 that is moved by the frictional force due to the rotation of the third gear 24 from coming into contact with the second gear 22 and losing the force that moves the lever 30. Such a configuration is particularly effective when the upper portion of the second gear 22 protrudes to the operation plane of the lever 30.

  FIG. 11 is a diagram illustrating another transport roller driving mechanism.

  In the transport roller driving mechanism 110 shown in FIG. 11, another lever 210 having a step-like groove 211 is used instead of the lever 30. Other configurations are the same as those of the transport roller driving mechanism 100 shown in FIG. A transport roller driving mechanism 110 shown in FIG. 11 can be employed in the disk reproducing apparatus 1 described above.

  The lever 200 has a step-like groove 211 as shown in the drawing. As shown in FIG. 11A, at the position where the first gear 20 just inserts and ejects the disk 2, the first shaft 21 of the first gear 20 is positioned at the straight portion of the intermediate portion of the stepped groove 211. Designed to be When the first shaft 21 of the first gear 20 is positioned in the straight portion, the force in the direction of arrow G, which is a force that is exactly 180 degrees opposite to the direction of the arrow E that the first gear 20 receives from the second gear 22. Is transmitted to the first shaft 21 of the first gear 20 via the lever 210.

  Therefore, the transport roller driving mechanism shown in FIG. 11 is configured so as not to move the first gear 20 more. Therefore, the transport roller 15 can move the disk satisfactorily without being separated from the ejection position of the disk 2.

FIG. 11B shows a state in which the transport roller 15 is in an insertion / ejection position for inserting / ejecting the disk 2 (when the disk 2 does not exist).
As shown in FIG. 11, by using the lever 200 having the step-like groove 211, there is also a secondary effect that the operation locus of the lever 200 can be minimized.
FIG. 12 is a view showing still another transport roller driving mechanism.

  In the transport roller driving mechanism 120 shown in FIG. 12A, a lever 220 having no cam groove is used instead of the lever 30. Other configurations are the same as those of the transport roller driving mechanism 100 shown in FIG. The transport roller driving mechanism 120 shown in FIG. 12A can be employed in the disk reproducing apparatus 1 described above.

  In the case of FIG. 12A, when the third gear 24 rotates in the direction of arrow C3 (when a disc is inserted), the rotational force of the third gear 24 is transmitted to the lever 220, and the first gear A force that moves the 20 first shafts 21 in the direction of the arrow F acts. As a result, the force to move the first gear 20 in the direction of the arrow E is canceled by the second gear 22, so that the first gear 20 is not moved and the transport roller 15 moves from the insertion position of the disk 2. The disc can be moved well without being separated.

  In the transport roller driving mechanism 130 shown in FIG. 12B, a lever 221 having no cam groove is used instead of the lever 30. Other configurations are the same as those of the transport roller driving mechanism 100 shown in FIG. A transport roller driving mechanism 130 shown in FIG. 12B can be employed in the disk reproducing apparatus 1 described above.

  In the case of FIG. 12B, when the third gear 24 rotates in the direction of the arrow C3 ′ opposite to the arrow C3 (when the disc is ejected), the lever 221 receives the rotational force of the third gear 24. The force is transmitted to move the first shaft 21 of the first gear 20 in the direction of the arrow F ′ opposite to the arrow F. As a result, the force to move the first gear 20 in the direction of the arrow E ′ opposite to the arrow E by the second gear 22 is canceled out, so the first gear 20 is not moved and the transport roller 15 is The disc can be favorably moved without being separated from the ejection position of the disc 2.

  As described above, in the transport roller driving mechanisms 120 and 130 shown in FIGS. 12A and 12B, the transport roller 15 can be simply inserted only when either the disk is inserted or ejected. The position is controlled so that the disk can be moved favorably.

  FIG. 13 is a diagram showing an improvement of the transport roller driving mechanism shown in FIG.

  FIG. 13A shows an example in which a stopper 222 of the lever 220 is further provided in the transport roller drive mechanism 120 of FIG. 12A, and FIG. 13B shows the transport roller of FIG. In the driving mechanism 120, an example in which a stopper 222 and a lever fixing spring 223 of the lever 220 are further provided is shown.

  In the example of FIG. 12 (a), when the normal gear is not rotating, the lever 220 is lowered by its own weight in the figure, and if left as it is, contact with other parts or the like occurs. Inconvenience may occur. Therefore, in the example of FIG. 13A, a stopper 222 is provided to restrict the movement of the lever 220 when the normal gear is not rotating.

  Further, when only the stopper 222 is provided as shown in FIG. 13A, there is a possibility that the lever 220 and the stopper 222 collide with each other due to vibration or the like in the state shown in FIG. . Therefore, in the example of FIG. 13B, a lever fixing spring 223 is further provided so that the lever 220 is fixed to the stopper 222 at the stroke end position. The load of the lever fixing spring 223 is such that the lever 220 is detached from the lever fixing spring 223 by the force generated by the rotation of the third gear 24, but the lever 220 is not detached from the lever fixing spring 223 due to vibration or the like. It needs to be set.

  FIG. 14 is a diagram showing still another transport roller driving mechanism.

  In the transport roller driving mechanism 140 shown in FIG. 14, the first gear 20 for rotating the transport roller 15 is driven using a total of five gears, and a lever 230 for regulating the position of the first gear 20. Is engaged with the fifth gear 241. Other configurations are the same as those of the transport roller driving mechanism 100 shown in FIG. The transport roller driving mechanism shown in FIG. 14 can be employed in the disk reproducing apparatus 1 described above.

  In the example of FIG. 14, when the fifth gear 241 coupled to the drive motor (not shown) rotates in the direction of the arrow C5, the fourth gear 240 rotates in the direction of the arrow C4. Rotating in the direction of C3, the second gear 22 rotates in the direction of arrow C2, and the first gear 20 rotates in the direction of arrow C1, so that the transport roller 15 is inserted so that the disk 2 is inserted into the disk reproducing apparatus 1. Is driven. As described above, the first gear 20 receives a force that can be moved in the direction of the arrow E by the rotation of the second gear 22. The lever 230 is engaged with the fifth gear 241 and transmits the force in the direction of the arrow H to the first shaft 21 of the first gear 20 according to the rotation of the fifth gear 241. By engaging and engaging the stepped groove 231 of the lever 230 and the first shaft 21 of the first gear 20, the force in the direction of arrow E is offset by the force in the direction of arrow H so that the first gear 20 does not move. It is configured. Therefore, the transport roller 15 can move the disk well without being separated from the insertion position of the disk 2.

  As shown in FIG. 14, the lever for restricting the movement of the first gear 20 does not necessarily have to be engaged with the third gear, and is in a direction opposite to the second gear 22 that applies a rotational force to the first gear 20. Any gear may be used as long as it rotates.

  FIG. 15 is a diagram showing still another transport roller driving mechanism.

  15 illustrates a case where the lever 30 illustrated in FIGS. 2 to 4 is further engaged with the third gear 24 in the transport roller drive mechanism 140 illustrated in FIG. A transport roller driving mechanism 150 shown in FIG. 15 can be employed in the disk reproducing apparatus 1 described above.

  In the example of FIG. 15, the lever 30 that transmits the rotational force from the third gear 24 to the first shaft of the first gear 20 and the lever that transmits the rotational force from the fifth gear 241 to the first shaft of the first gear 20. 230 is provided and the first gear 20 is regulated by two levers. Accordingly, since the first gear 20 is configured not to move further, the transport roller 15 can move the disk well without being separated from the insertion position of the disk 2.

1 is a schematic top view of a disc playback apparatus 1. FIG. FIG. 4 is a diagram illustrating a driving mechanism 100 for a conveyance roller 15. FIG. 4 is a diagram illustrating a driving mechanism 100 for a conveyance roller 15. FIG. 4 is a diagram illustrating a driving mechanism 100 for a conveyance roller 15. 3 is a perspective view of a lever 30. FIG. 3 is a perspective view of a gear cover 40. FIG. It is a figure which shows the relationship between a 3rd gearwheel, a lever, and a gear cover. It is a figure which shows the other relationship of a 3rd gearwheel, a lever, and a gear cover. It is a figure which shows other structure of a 3rd gearwheel. FIG. 6 is a view for explaining the function of a stepped groove 31 of the lever 30. It is a figure which shows the other conveyance roller drive mechanism 110. FIG. It is a figure which shows other conveyance roller drive mechanisms 120 and 130. It is a figure which shows the improvement of the conveyance roller drive mechanism 120 shown to Fig.12 (a). FIG. 6 is a view showing still another transport roller driving mechanism 140. FIG. 6 is a view showing still another transport roller driving mechanism 150.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc reproduction | regeneration apparatus 2 Disc 15 Conveyance roller 20 1st gear 22 2nd gear 24 3rd gear 30,210,220,221,231 Lever 31,231 Stepped groove 32 1st fitting part 33 Burring 40 Gear cover 46 2nd Fitting part 47 Third fitting part 48 Side part 100, 110, 120, 130, 140, 150 Drive mechanism 211 Stepped groove

Claims (10)

A transport roller for transporting the disk;
A first gear coupled to the transport roller for rotating the transport roller;
A second gear meshed with the first gear;
A third gear that transmits driving force to the first gear via the second gear and rotates in a direction opposite to the second gear;
The force generated by the rotation of the third gear is applied to the first gear in order to cancel the force of the first gear that is connected to the third gear and the second gear rotates. A transmission member for transmitting;
A disc reproducing apparatus comprising:   The disk reproducing apparatus according to claim 1, wherein the transmission member has a fitting portion for fitting with the third gear.   The disk reproducing apparatus according to claim 2, further comprising a crimping mechanism for crimping the fitting portion of the transmission member to the third gear.   The crimping mechanism includes a spring member for crimping the fitting portion against the third gear, a gap member for increasing a frictional force between the fitting portion and the third gear, or the fitting portion and the first gear. 4. The disk reproducing apparatus according to claim 3, wherein the disk reproducing apparatus is a magnet for magnetically attracting three gears.   The disk reproducing apparatus according to claim 1, further comprising a support member that movably supports the transport roller between a transport position for transporting the disk and a retracted position where the disk is not transported.   The transmission member has a groove for engaging with the first gear, and the first gear moves while engaging with the groove when the transfer roller moves between the transfer position and the retracted position. 6. The disc reproducing apparatus according to claim 5, wherein   The disk reproducing apparatus according to claim 6, wherein the groove is formed in a stepped shape or a stepped shape. A fourth gear that receives driving force from the third gear and rotates in a direction opposite to the second gear;
The force generated by the rotation of the fourth gear is applied to the first gear in order to cancel the force that the first gear tries to move as the fourth gear rotates by being connected to the fourth gear. A second transmission member for transmitting;
The disk reproducing apparatus according to claim 1, further comprising:   The disk reproducing apparatus according to claim 1, wherein the transmission member has a shape that does not contact the first gear. A disk reproducing apparatus having a transport roller for transporting a disk and a first gear coupled to the transport roller,
Coupled with a second gear that rotates in the same direction as the first gear, a force generated by the rotation of the second gear is applied to the first gear to cancel the force that the first gear tries to move. A transmission member for transmitting,
A disc reproducing apparatus comprising:

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