JP4841395B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device in which a disk inserted from an insertion port is transported to a rotational drive unit by two transport rollers.

  Patent Document 1 below discloses a disk device in which a disk inserted from an insertion slot is transported into the apparatus by two transport rollers.

  In this disk device, a first transport roller is provided on the insertion port side, and a second transport roller is provided on the back side of the device (on the opposite side to the insertion port side) from the first transport roller. The first transport roller is rotatably supported by the first arm, and the first arm is supported so as to be swingable about a shaft fixed to the apparatus main body. Similarly, the second transport roller is rotatably supported by the second arm, and the second arm is supported so as to be swingable about an axis fixed to the apparatus main body.

When turning force is individually applied to the first arm and the second arm, both the first transport roller and the second transport roller are pressed against the disk, whereby the disk is moved to the first transport roller and the second arm. It is sandwiched between the two conveying rollers and a support portion facing these rollers. Then, the disk is conveyed by the rotational force of the first conveyance roller and the second conveyance roller.
JP 11-328812 A

  In the disk device, the first transport roller is operated by the first arm and the second transport roller is operated by the second arm, but the first arm and the second arm are not interlocked. . For this reason, in order to carry the disc more reliably, the first carrying roller is pressed against the disc more strongly than the second carrying roller when the disc is loaded, or the second carrying roller is brought into contact with the disc when the disc is carried out. It is difficult to control such as pressing strongly. In order to perform such an operation, a complicated mechanism for controlling the first arm and the second arm is required.

  Further, in this type of disk device, dust easily enters the device from the insertion port, and dust attached to the surface of the disk is easily carried into the device. If dust adheres to the optical head or the like inside the apparatus, it greatly affects the reading accuracy of information recorded on the disk. For example, if dust is applied to the surface of the transport roller by making the surface of the transport roller uneven, the contact area between the surface of the roller having unevenness and the disk is reduced, and the transport force applied to the disk is reduced. Will be reduced. Therefore, it is difficult to provide the contradictory functions of adsorbing dust with the transport roller and applying a strong transport force from the transport roller to the disk.

  The present invention solves the above-described conventional problems, and provides a disk device capable of effectively applying a conveying force from a conveying roller to the disk and easily preventing dust from entering the apparatus. The purpose is that.

The present invention relates to a disk device having a rotation drive unit that drives a disk, and a transport unit that carries the disk from an insertion port to the rotation drive unit and carries the disk from the rotation drive unit to the insertion port.
Said conveying means includes a first conveying roller, the second conveying rollers located in the first said rotational driving portion than the conveying rollers of the first rotary shaft and the second conveyance of the conveying roller a support member for supporting both the rotation axis of the roller, said first said support member extends parallel to the two rotating shafts in the middle of the rotary shaft and the rotary shaft of the second conveying rollers of the conveying roller of the rocking A center axis that is movably supported ;
Rotational driving force of said central axis and biasing member for urging the disk to the first and the rotary shaft of the conveying roller and both the for carrying direction of the axis of rotation of the second conveying rollers out direction a power transmission mechanism for giving synchronization and a slider for switching two posture of the conveying rollers have been found provided,
When the disk is loaded and unloaded, the two rotating shafts are not restrained by the slider, the two conveying rollers are pressed against the disk, and when the loading of the disk is completed, the slider moves, The two rotation shafts are retracted in a direction away from the disk by a descending restraint provided on the slider .

  In the present invention, when both the rotating shafts are rotationally driven in the direction of loading the disk, a moment in a direction in which the first conveying roller is strongly pressed against the disk acts on the support member, and the both rotating shafts However, when the disk is driven to rotate in the direction of unloading, a moment in a direction in which the second conveying roller is strongly pressed against the disk acts on the support member.

  Therefore, both when the disk inserted from the insertion slot is carried into the apparatus and when the disk is carried out from the apparatus to the insertion slot, the conveyance roller can be strongly pressed against the disk. Thus, the conveying force is reliably transmitted to the disc.

  Further, in the present invention, the other conveyance when the dust adheres to the surface of the other conveyance roller than the disk conveyance force by the one conveyance roller when the dust adheres to the surface of the one conveyance roller. It is preferable that the disc conveying force by the roller is larger.

  If one transport roller has a surface structure that is easier to adsorb dust than the other transport roller, the transport force applied to the disk from the other transport roller, which has a smaller force to adsorb dust, is greater than the transport force of one transport roller growing. In this way, one transport roller can easily adsorb dust and the other transport roller can exert a large transport force, thereby preventing both dust from entering the apparatus and reliably transporting the disk. Can be realized.

  For example, the surface of one transport roller is uneven, the surface of the other transport roller is flat or smaller than the one transport roller, and dust adheres to the surface of the one transport roller that is uneven. In this case, the disk transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disk transport force by the one transport roller. Or, when the surface roughness of the surface of one transport roller is rougher than the surface roughness of the surface of the other transport roller and the surface roughness of the surface is rough, dust adheres to the surface of the one transport roller. The disk transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disk transport force by the one transport roller.

  In the above means, dust can be held in the recesses on the surface of one of the transport rollers, and the dust can be easily adsorbed. Further, since the contact area between the surface of the other transport roller and the disk becomes wide, the dust attracting force is weakened, but a large transport force can be applied to the disk from the other transport roller.

  Alternatively, according to the present invention, when the surface of one of the conveying rollers has a hardness lower than that of the other of the conveying rollers and the surface hardness of the one conveying roller is low, The disc transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disc transport force by the other transport roller.

  In the above means, since the surface of one of the conveying rollers is soft, the surface is deformed when dust is sandwiched between the rollers, and the dust is easily adsorbed to the roller surface. On the other hand, since the other transport roller has a high surface hardness, a large transport force can be applied to the disk.

  Further, the present invention provides the disk transport force by the second transport roller when dust adheres to the surface of the second transport roller, and when the dust adheres to the surface of the first transport roller, It is preferable that it is larger than the disc conveying force by the first conveying roller.

  As described above, in this disk device, when the disk is carried out from the insertion slot, a moment acts on the support member so that the second conveying roller strongly hits the disk. In this type of disk device, it is more important to be able to reliably carry out the disk in the device than to be able to carry the disk into the device. Therefore, the second transport roller that strongly hits the disk during unloading is a roller having a strong transport force, and the first transport roller is a roller that easily adsorbs dust, so that the disk can be reliably unloaded from the inside of the apparatus, In addition, it is possible to configure a disk device that easily prevents dust from entering the device.

Further, according to the present invention, the central shaft provided on the support member is supported by one end of a swinging member that swings, and the biasing force of the biasing member acts on the swinging member. The member is biased in a direction in which the central axis approaches the disk.

  The support members that respectively support the rotation shafts of the two transport rollers have their center axes supported by the swing member, and the support member is swingably supported. By urging the central shaft toward the disk, both the pair of transport rollers are surely pressed against the disk.

  In the disc device of the present invention, one of the transport rollers is strongly against the disc by the swinging motion of the support member both when the disc is carried into the device from the insertion port and when the disc is carried out from the insertion port. Press contact. For this reason, it is possible to reliably apply a conveying force to the disk both during loading and unloading.

  Further, according to the present invention, dust adhering to the disk can be prevented from entering the apparatus, and a conveying force can be surely given to the disk during unloading.

  FIG. 1 is a bottom view of a mechanism unit provided in a disk device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a transport mechanism provided in the mechanism unit with the bottom face down and a part of the mechanism removed. 3 is a partially exploded perspective view of the transport mechanism, FIG. 4 is a side view of the transport mechanism, and FIG. 5 is a cross-sectional view showing a first transport roller and a sliding member. In all the drawings, the illustrated X1 direction is the right direction, the X2 direction is the left direction, the Y1 direction is the front, the Y2 direction is the rear, the Z1 direction is the upward direction, and the Z2 direction is the downward direction. FIG. 1 is a bottom view showing the Z2 direction toward the front side of the page.

  The disk device 1 can be loaded with a disk D such as a DVD (digital versatile disk). The disk device 1 has a housing (not shown) that is sufficiently thinner than the 1DIN size of in-vehicle equipment. The mechanism unit 2 shown in FIG. 1 is housed in the housing. On the Y1 side of the housing, a nose portion (not shown) having a liquid crystal display panel and various switches is provided (not shown), and a slit-like insertion port extending in the width direction (X direction) is provided in the nose portion. .

  As shown in FIG. 1, the mechanism unit 2 is provided with two transport rollers 6A and 6B as transport means, and the disk D is transported in the Y2 direction from the insertion port by the transport rollers 6A and 6B, and the Y1 direction. It is carried out to. The conveyance roller 6A is a first conveyance roller, and the conveyance roller 6B is a second conveyance roller.

  A bottom chassis 12 appears on the bottom side of the mechanism unit 2 shown in FIG. 1, and a drive base 8 is provided from the center to the rear (Y2 direction) area of the bottom chassis 12. As shown in FIG. 2, the clamp base 9 is opposed to the upper side (Z1 side) of the drive base 8. A top chassis 10 is provided in front of the clamp base 9, and both side portions of the top chassis 10 are fixed to the bottom chassis 12. 2 and 3 show a state in which the top chassis 10 is removed, and only the top chassis 10 is shown in FIGS. A fixed chassis is formed by the top chassis 10 and the bottom chassis 12, and the disk D is inserted from the insertion slot and fed into a space between the top chassis 10 and the bottom chassis 12.

  As shown in FIG. 1, a rotational drive unit 4 is provided at the tip of the drive base 8 on the Y1 side. As shown in FIG. 2, in the rotation drive unit 4, the spindle motor 5 is fixed on the drive base 8, and the turntable 7 is fixed to the rotation shaft of the spindle motor 5. As shown in FIG. 1, the drive base 8 is provided with a head portion 17. The head portion 17 is guided by guide shafts 16, 16 so as to be movable along the recording surface of the disk D placed on the turntable 7. The head portion 17 is guided to the drive base 8 in the radial direction of the disk. A sled drive mechanism is provided for movement.

  As shown in FIG. 2, a clamper 11 facing the turntable 7 is provided on the lower surface of the tip portion on the Y1 side of the clamp base 9, and the clamper 11 is rotatably supported by the clamp base 9. As shown in FIG. 1, support bases 8c and 8c are provided on both sides in the X1 direction and the X2 direction at the base portion on the Y2 side of the drive base 8, and the shafts 9a and 9a are fixed to the respective support pieces 8c and 8c. (In FIG. 1, only the shaft 9a on the X1 side is shown). The base end portion on the Y2 side of the clamp base 9 is rotatably supported by the shafts 9a and 9a.

  The shaft 9a is provided with a pressing biasing member (not shown) formed of a torsion coil spring. By the urging force of the pressing urging member, the clamp base 9 is urged to rotate about the shafts 9a, 9a, and the clamper 11 is always urged in a direction to be pressed against the turntable 7.

  On the other hand, the shaft pin 8a1 and the shaft pin 8a2 shown in FIG. 1 are fixed to both sides of the base end portion on the Y2 side of the drive base 8. A support piece 10a bent vertically downward (Z2 direction) is formed on the X1 side of the top chassis 10, and the shaft pin 8a1 is rotatably supported by the support piece 10a. The bottom chassis 12 is also formed with a support piece 12a bent downward, and the shaft pin 8a2 is rotatably supported by the support piece 12a.

  Therefore, the drive base 8 is rotatably supported by a fixed chassis composed of the top chassis 10 and the bottom chassis 12 with the shaft pins 8a1 and 8a2 as fulcrums, and the clamp base 9 is located behind the drive base 8 in the drive The base 8 is rotatably supported.

  The drive base 8 rotates between a drive posture parallel to the top chassis 10 and the bottom chassis 12 and a disk standby posture in which the turntable 7 side is inclined to descend in the Z2 direction. Further, the clamp base 9 rotates between a clamp posture in which the clamper 11 is pressed against the turntable 7 and a clamp release posture in which the clamper 11 is inclined so as to face upward.

  As shown in FIG. 1, detection pins 26 and 26 are provided at the front end of the top chassis 10 on the Y1 side. As shown in FIG. 1, the detection pins 26, 26 are in positions close to each other and are biased in the approaching direction. When the disk D is inserted from the insertion port in the Y2 direction, the detection pins 26 and 26 are moved away from each other by the outer peripheral edge of the disk D. When the detection pins 26 and 26 move away from each other, it is detected that the disk D is inserted. When the disk D is unloaded and the detection pins 26 and 26 return to the approaching position, it can be detected that the disk D has been completely removed.

  A left slider 3A is provided on the left side of the top chassis 10, and a right slider 3B is provided on the right side. The left side slider 3A and the right side slider 3B are supported by the top chassis 10 so as to be slidable in the Y1-Y2 direction.

  As shown in FIG. 1, a switching motor M is provided on the bottom chassis 12 at the left rear of the mechanism unit 2, and a gear group H that decelerates and transmits the power of the switching motor M is provided on the bottom surface of the bottom chassis 12. It has been. A shaft 21 is fixed to the left side of the bottom chassis 12, and a drive member 20 is rotatably provided on the shaft 21, and the power of the switching drive motor M is transmitted to the drive member 20 via the gear group H. The drive member 20 is rotationally driven. The drive member 20 is provided with a drive protrusion 20a, and the drive protrusion 20a is locked to the left slider 3A. When the drive member 20 is rotated by the power of the switching motor M, the left slider 3A is linearly moved in the Y1 direction and the Y2 direction by the drive protrusion 20a integrated with the drive member 20.

  As shown in FIG. 1, a link mechanism 30 that connects the left side slider 3 </ b> A and the right side slider 3 </ b> B is provided on the lower surface of the bottom chassis 12. The link mechanism 30 is provided with a slider link 31. Guide long holes 31a and 31a extending in the X1-X2 direction are formed in the slider link 31, and the guide long holes 31a and 31a are inserted into guide protrusions 12b and 12b formed by bending downward from the bottom chassis 12, and the slider The link 31 is supported so that it can move in the X1 direction and the X2 direction. The drive member 20 is provided with a connection pin 20 b, and this connection pin 20 b is locked in the long hole of the slider link 31.

  A reverse link 32 is provided on the right side of the bottom surface of the bottom chassis 12. The reverse link 32 is rotatably supported by a shaft 33 fixed to the lower surface of the bottom chassis 12. A connecting pin 34 is fixed to the reverse link 32, and the connecting pin 34 is hooked in an elongated hole formed in the slider link 31. A driving protrusion 32a is integrally formed on the reverse link 32, and the driving protrusion 32a is hooked on the right side slider 3B.

  In the operation state shown in FIG. 1, the driving member 20 is rotated counterclockwise, and the left slider 3 </ b> A is moved in the Y <b> 2 direction by the driving protrusion 20 a formed integrally with the driving member 20. At this time, the slider link 31 is moved in the X2 direction by the counterclockwise turning force of the drive member 20, and the reverse rotation link 32 is rotated in the clockwise direction by the slider link 31. Therefore, the right slider 3B is also moved in the Y2 direction by the drive protrusion 32a of the reverse link 32.

  When the drive member 20 is rotated clockwise by the switching drive motor M from the state of FIG. 1, the left slider 3A is moved in the Y1 direction by the drive protrusion 20a integrated with the drive member 20. Further, the slider link 31 moves in the X1 direction, the reverse rotation link 32 is rotated counterclockwise, and the right slider 3B is moved in the Y1 direction by the drive protrusion 32a provided on the reverse rotation link 32. That is, by providing the link mechanism 30, the left side slider 3A and the right side slider 3B are synchronously driven together in the same Y1 direction and the same Y2 direction.

  As shown in FIG. 1, a control plate 31b is bent downward in the slider link 31, and a posture control cam slot is formed in the control plate 31b. At the end of the drive base 8 on the Y1 side, a posture switching projection 8d is provided, and this posture switching projection 8d is inserted into the posture control cam slot. In the operation state of FIG. 1, the slider link 31 is moved in the X2 direction, and the posture control cam slot is also moved in the X2 direction. At this time, the posture switching projection 8d is lowered in the Z2 direction by the posture control cam slot. Therefore, the drive base 8 has an inclined posture in which the turntable 7 is lowered with the shaft pins 8a1 and 8a2 as fulcrums, and is in a disc standby posture (retracting posture).

  A clamp lifting cam for lifting the clamp base 9 is integrally formed on both the left side slider 3A and the right side slider 3B. In the operation state of FIG. 1, both the left side slider 3A and the right side slider 3B are moved in the Y2 direction, the clamp base 9 is lifted by the clamp lifting cam, and the clamper 11 is separated upward. It is posture.

  1, when the drive member 20 is driven clockwise by the switching drive motor M, the slider link 31 moves in the X1 direction, and the posture switching projection 8d is lifted in the Z1 direction by the posture control cam slot. As a result, the drive base 8 assumes a drive posture. Further, both the left side slider 3A and the right side slider 3B move in the Y1 direction, the lifting of the clamp base 9 by the clamp lifting cam is released, and the clamper 11 is lowered to the turntable 7 side.

  As shown in FIG. 1, in the mechanism unit 2, the four corners D <b> 1, D <b> 2, D <b> 3, D <b> 4 of the top chassis 10 are supported inside the casing via elastic support members 70, 70, 70, 70. The elastic support member 70 is an oil damper. With the elastic support member 70, the entire mechanism unit 2 can be elastically supported in the housing.

  Both the left side slider 3A and the right side slider 3B are formed with lock cam portions, and inside the housing are provided lock projections with which the lock cam portions come into pressure contact. As shown in FIG. 1, when both the left side slider 3A and the right side slider 3B are moving in the Y2 direction, the lock cam portion comes into pressure contact with the lock protrusion, and the mechanism unit 2 moves inside the housing. Be restrained not to. When both the left side slider 3A and the right side slider 3B move in the Y1 direction, the lock cam portion is separated from the lock protrusion, and the mechanism unit 2 is elastically supported through the elastic support member 70 in the housing. .

  Next, the transport mechanism 40 of the disk device 1 will be described. The transport mechanism 40 is provided in the mechanism unit 2.

  As shown in FIG. 2, the transport mechanism 40 includes a transport roller (first transport roller) 6A and a transport roller (second transport roller) 6B. The transport rollers 6A and 6B are provided at regular intervals in the transport direction (Y1-Y2 direction) of the disk D, and both the transport rollers 6A and 6B are parallel to each other with the axial direction directed to the X1-X2 direction. A conveyance roller 6A that is a first conveyance roller is provided on the Y1 side, that is, the insertion port side, and a conveyance roller 6B that is a second conveyance roller is provided on the Y2 side, that is, the rotation drive unit 4 side.

  The conveying roller 6A is provided on the outer periphery of the rotating shaft 6A0 shown in FIG. 4, and can rotate together with the rotating shaft 6A0 by a frictional force with the rotating shaft 6A0. The diameter of the transport roller 6A gradually increases from the center to both ends. Similarly, the conveying roller 6B is also provided on the outer periphery of the rotating shaft 6B0, and can be rotated together with the rotating shaft 6B0 by a frictional force with the rotating shaft 6B0. Also, the diameter of the transport roller 6B gradually increases from the central portion toward both ends. The conveyance roller 6A and the conveyance roller 6B are made of rubber, and the rotation shaft 6A0 and the rotation shaft 6B0 are made of metal.

  An auxiliary guide member 41 for assisting the conveyance of the disk D is provided between the conveyance rollers 6A and 6B. The auxiliary guide member 41 is made of a synthetic resin and has an elongated shape in which the dimension in the left-right direction (X1-X2 direction) is longer than the width dimension in the front-rear direction (Y1-Y2 direction). A support member 42A is integrally formed at the left end (X2 side) of the auxiliary guide member 41, and a support member 42B is integrally formed at the right end (X1 side) of the auxiliary guide member 41. The support members 42A and 42B are elongated in the front-rear direction.

  As shown in FIG. 4, a cylindrical bearing portion 42B1 is integrally formed at the front end (end portion on the Y1 side) of the support member 42B, and one end of the rotating shaft 6A0 is inserted into the bearing portion 42B1. And is supported rotatably. A cylindrical bearing portion 42B2 is formed at the rear end (end portion on the Y2 side) of the support member 42B, and the rotary shaft 6B0 is rotatably inserted into the bearing portion 42B2. A central shaft 43B is integrally formed on the support member 42B so as to protrude between the bearing portion 42B1 and the bearing portion 42B2.

  As shown in FIG. 4, a bent piece 10 b that is bent downward (Z2 side) is formed at the front end portion of the top chassis 10. A swing link (swing member) 44B is rotatably supported by a pin 45 fixed to the bent piece 10b. A holding hole 44B1 with a part cut away is formed at the front end of the swing link 44B, and a central shaft 43B provided in the support member 42B is rotatably supported by the holding hole 44B1. At the upper end of the swing link 44, a latching portion 44B2 is formed. One end of a tension coil spring 51B, which is an urging member, is hooked on the latching portion 44B2, and the other end of the tension coil spring 51B is hooked on a latching portion (not shown) provided on the top chassis 10. The swing link 44B is biased in the α1 direction by the tension biasing force of the tension coil spring 51B, and the support member 42B and the auxiliary guide member 41 are biased upward.

  As shown in FIGS. 4 and 5, a sliding member 52 is fixed to the lower surface of the top chassis 10 so as to face both the transport roller 6 </ b> A and the transport roller 6 </ b> B. The sliding member 52 is made of a synthetic resin material having a small friction coefficient with the disk D. When the swing link 44B is rotated in the α1 direction by the biasing force of the tension coil spring 51B, the transport roller 6A and the transport roller 6B are pressed against the sliding member 52. As shown in FIG. 4, when the disk D is sandwiched between the transport rollers 6A and 6B and the sliding member 52, when the transport rollers 6A and 6B rotate, the disk D is sent in the Y1-Y2 direction.

  As shown in FIG. 4, the swing link 44B is formed with a clearance recess 44B3 that is open toward the lower end, and the bearing portion 42B2 provided at the rear end of the support member 42B is positioned in the clearance recess 44B3. is doing.

  As shown in FIG. 2, the support member 42A located on the left side (X2 side) is also provided with a bearing portion 42A1 at the front end, and the left end portion of the rotation shaft 6A0 is rotatably inserted into the bearing portion 42A1. Has been. A bearing hole 42A2 is formed at the rear end portion of the support member 42A, and the left end portion of the rotating shaft 6B0 is rotatably inserted into the bearing hole 42A2.

  A swing link 44 </ b> A is provided as a swing member on the left side portion of the top chassis 10. The swing link 44A has the same shape as the swing link 44B shown in FIG. The combination structure of the swing link 44A and the support member 42A is the same as the combination structure of the swing link 44B and the support member 42B shown in FIG. A latching portion 44A1 is provided at the upper end of the swinging link 44A shown in FIG. 2, and a tension coil spring is hooked on the latching portion 44A1, and the swinging link 44A is urged upward.

  As shown in FIG. 2, the gear h1 is fixed to the rotating shaft 6A0 protruding from the support member 42A in the X2 direction, and the gear h2 is fixed to the rotating shaft 6B0. An intermediate gear that meshes with both the gear h1 and the gear h2 is provided on the central axis of the support member 42A, and the gear h1 and the gear h2 rotate in synchronization. A gear h3 for power transmission is engaged with the gear h2. The power of the switching drive motor M or the power of a transport motor provided separately from the switching drive motor M is transmitted to the gear h2 through the gear h3, and the rotary shaft 6A0 and the rotary shaft 6B0 are synchronized with each other. It is rotationally driven in the direction.

  As shown in FIG. 3, cam grooves 3B1 and 3B2 are formed in the right slider 3B. An upper horizontal portion 3B11, an inclined portion 3B12, and a descending restraint portion 3B13 are continuously formed in the cam groove 3B1 located at the front from the front end side toward the rear, and the right end portion of the rotation shaft 6A0 that rotates the conveying roller 6A. Is inserted into the cam groove 3B1. The inner width dimension of the upper horizontal part 3B11 is sufficiently wider than the diameter of the rotating shaft 6A0. An upper horizontal portion 3B21, an inclined portion 3B22, and a lowering restraining portion 3B23 are also formed in the cam groove 3B2 located at the rear, and the right end portion of the rotating shaft 6B0 that rotates the transport roller 6B is inserted into the cam groove 3B2. . The inner width dimension of the upper horizontal portion 3B21 is sufficiently wider than the diameter of the rotating shaft 6B0.

  A pair of cam grooves is also formed in the left slider 3A shown in FIG. The shape of each cam groove is symmetrical to the cam groove 3B1 and the cam groove 3B2, and the left end of the rotating shaft 6A0 is inserted into the front cam groove, and the left end of the rotating shaft 6B0 is inserted into the rear cam groove. Has been.

  The state of the roller surface is different between the conveyance roller 6A, which is the first conveyance roller located on the insertion port side, and the conveyance roller 6B, which is the second conveyance roller located on the rotation drive unit 4 side. The surface of one of the transport rollers is likely to adsorb dust. On the other hand, the surface of the other transport roller is not as structured as adsorbing dust as much as the surface of the one transport roller, but it rotates while being pressed against the disk with dust adhering to the surface. In this case, the conveying force applied to the disk is larger than that of the one conveying roller. In this embodiment, the transport roller 6A, which is the first transport roller, is more likely to adsorb dust, and the transport roller 6B, which is the second transport roller, in the state where dust adheres to the surface of the transport roller, Demonstrates disk transport force greater than 6A.

  In this embodiment, the transport roller 6A and the transport roller 6B are formed of the same rubber material, and a number of recesses are formed on the surface of the transport roller 6A as shown in FIG. On the other hand, the surface of the conveyance roller 6B is a flat surface. Or although the recessed part is formed in the surface of the conveyance roller 6B, the depth of the recessed part is shallower than the conveyance roller 6A, or the area ratio which the recessed part in the roller surface occupies is sufficiently more than the conveyance roller 6A small. Since the conveyance roller 6A has a small contact area with the disk D and has a large number of recesses on the surface, the dust adhering to the surface of the disk D is easily adsorbed in the recesses. In contrast, the transport roller 6B is less likely to have dust attached to the surface. Further, since the conveyance roller 6B has a large contact area with the disk D, the frictional force applied to the disk D increases, and the disk D and the conveyance roller 6B are unlikely to slip. In other words, in a state where dust adheres to the surface of the transport roller, the transport roller 6B exerts a larger disk transport force on the disk D than the transport roller 6A.

  Or you may make the surface roughness of the surface of the conveyance roller 6A larger than the surface roughness of the conveyance roller 6B. Also in this case, the surface of the conveying roller 6A having a large surface roughness is easy to adsorb dust, and the conveying roller 6B having a small surface roughness has a large contact area with the disk D, and in a state where dust adheres to the surface of the conveying roller. The disk transport force applied to the disk D from the transport roller 6B is larger than the disk transport force applied to the disk D from the transport roller 6A.

  Alternatively, the materials of the transport roller 6A and the transport roller 6B may be made different so that the surface hardness of the transport roller 6A is low and the surface hardness of the transport roller 6B is higher than that of the transport roller 6A. The conveyance roller 6A having a low surface hardness is deformed so as to be adapted to the dust on the surface of the disk D, and easily adsorbs the dust on the roller surface. On the other hand, the transport roller 6B having a high surface hardness is less likely to slip between the disk D and the transport force applied to the disk D can be increased. Therefore, even in this case, in a state where dust adheres to the surface of the transport roller, the disk transport force applied from the transport roller 6B to the disk D is larger than the disk transport force applied from the transport roller 6A to the disk D.

Next, the operation of transporting the disk D by the transport mechanism 40 will be described.
(Disc loading operation)
In a standby state waiting for the disk D to be loaded into the disk device 1, the left slider 3A and the right slider 3B are both moved rearward (Y2 direction), and the rotation shaft 6A0 that rotates the transport roller 6A is rotated. The right end portion is located in the upper horizontal portion 3B11 of the cam groove 3B1 formed in the right slider 3B shown in FIG. Similarly, the left end portion of the rotation shaft 6A0 is positioned in the upper horizontal portion of the cam groove of the left side slider 3A. Further, the right end portion of the rotation shaft 6B0 that rotates the transport roller 6B is located in the upper horizontal portion 3B21 of the cam groove 3B2 of the right side slider 3B. Similarly, the left end portion of the transport roller 6B0 is located in the upper horizontal portion of the cam groove formed in the left side slider 3A.

  At this time, the tension coil spring 51B biases the swing link 44B in the α1 direction, and both the transport roller 6A and the transport roller 6B are elastically pressed against the lower surface of the sliding member 52 provided on the lower surface of the top chassis 10. ing.

  When both the left side slider 3A and the right side slider 3B are retracted in the Y2 direction, the slider link 31 shown in FIG. 1 is moved in the X2 direction. At this time, the attitude switching projection 8d provided at the end of the drive base 8 on the Y1 side is lowered by the attitude control cam slot of the control plate 31b provided in the slider link 31. Therefore, the drive base 8 has an inclined posture in which the turntable 7 is lowered with the shaft pins 8a1 and 8a2 as fulcrums, and is in a disc standby posture (retracting posture).

  When both the left side slider 3A and the right side slider 3B are retracted in the Y2 direction, the clamp base 9 is lifted by the clamp lifting cams provided on the sliders 3A and 3B, and the clamper 11 is moved to the turntable 7. Away from.

  When the disk D is inserted from the insertion slot, the detection pins 26 and 26 shown in FIG. 1 are pushed open by the outer peripheral edge of the disk D, and a switch (not shown) is operated. As a result, the insertion of the disk D is detected, the motor is started, and the transport roller 6A and the transport roller 6B start to rotate in the clockwise direction (disk transport direction) in FIG. The inserted disk D is sandwiched between the transport rollers 6A and 6B and the sliding member 52 and is carried in the apparatus back direction (Y2 direction).

  In a state where the conveying roller 6A is pressed against the disk D by the urging force of the tension coil spring 51B, the upper horizontal portion 3B11 of the cam groove 3B1 formed in the right side slider 3B does not constrain the rotating shaft 6A0 and rotates. The right end portion of the shaft 6A0 can slightly move in the vertical direction within the upper horizontal portion 3B11. Similarly, the rotation shaft 6A0 can move slightly up and down in the upper horizontal portion of the cam groove provided in the left slider 3A.

  This also applies to the relationship between the upper horizontal portion 3B21 of the cam groove 3B2 of the right slider 3B and the rotation shaft 6B0, and the upper horizontal portion of the cam groove formed on the left slider 3A and the rotation shaft 6B0.

  Therefore, when the transport rollers 6A and 6B rotate in the clockwise direction in FIG. 4, a moment in the β1 direction in FIG. 4 acts on the support members 42A and 42B with the central shaft 43B as a fulcrum. The pressure contact force between the transport roller 6A located on the mouth side and the disk D is stronger than the pressure contact force between the transport roller 6B and the disk D. The conveyance roller 6A on the insertion port side has a structure in which a concave portion is formed on the surface, or the surface roughness is large, or the surface hardness is low, and dust is easily adsorbed. When the transport roller 6A is in close contact with the disk D, dust on the surface of the disk D is easily attracted to the surface of the transport roller 6A. Therefore, dust attached to the disk D is difficult to enter the apparatus.

  The loaded disk D is sent between the turntable 7 and the clamper 11. When the center hole of the disk D coincides with the center of the turntable 7, the drive member 20 shown in FIG. 1 is rotated clockwise by the switching drive motor M. As a result, the left slider 3A is moved in the Y1 direction, and the slider link 31 is moved in the X1 direction. The moving force of the slider link 31 is given to the right side slider 3B via the reverse link 32, and the right side slider 3B is also moved in the Y1 direction.

  When the slider link 31 is moved in the X1 direction, the attitude switching projection 8d provided at the end of the drive base 8 on the Y1 side is lifted by the attitude control cam slot of the control plate 31b provided in the slider link 31. Thus, the drive base 8 has a substantially horizontal drive posture. Further, when the left slider 3A and the right slider 3B move in the Y1 direction, the force that lifts the clamp base 9 by the clamp lifting cams formed on the sliders 3A and 3B is released, and the clamp base 9 is moved by the spring force. The center hole of the disk D is clamped by the clamper 11 and the turntable 7 and clamped.

  Further, the right end portions of the rotary shaft 6A0 and the rotary shaft 6B0 are lowered and restrained by the descending restraining portion 3B13 of the cam groove 3B1 and the descending restraining portion 3B23 of the cam groove 3B2 formed in the right slider 3B shown in FIG. Is done. Similarly, the left end portions of the rotation shaft 6A0 and the rotation shaft 6B0 are lowered by the cam groove formed in the left slider 3A. Therefore, the transport roller 6A and the transport roller 6B are separated from the disk D. Then, the disk D is rotationally driven by the spindle motor 5, and the information recorded on the disk D is read by the head unit 17.

(Disk unloading operation)
When unloading the disk D that has been rotationally driven by the rotational drive unit 4, the rotation of the turntable 7 is stopped, the switching drive motor M is started, and the drive member 20 shown in FIG. 1 is rotated counterclockwise. Move. Therefore, the slider link 31 moves in the X2 direction, the drive base 8 is rotated to the drive standby posture, the left side slider 3A and the right side slider 3B move in the Y2 direction, the clamp base 9 is lifted, The clamp of the disk D is released.

  Further, the restraints of the cam grooves 3B1 and 3B2 formed in the right slider 3B shown in FIG. 3 on the rotary shafts 6A0 and 6B0 by the lowering restraining portions 3B13 and 3B23 are released, and similarly formed in the left slider 3A. The restraint on the rotary shafts 6A0 and 6B0 by the cam grooves is released, and the transport roller 6A and the transport roller 6B are pressed against the disk D by the biasing force of the tension coil spring 51B. Then, the transport roller 6A and the transport roller 6B rotate counterclockwise in FIG. 4, and the disk D is transported toward the insertion port.

  When the transport roller 6A and the transport roller 6B rotate counterclockwise in FIG. 4, a moment in the β2 direction due to the torque of the gear h3 acts on the support members 42A and 42B. As a result, the pressure contact force between the transport roller 6B and the disk D positioned on the rotation drive unit 4 side is stronger than the pressure contact force between the transport roller 6A and the disk D. The transport roller 6B has a flat surface, a small surface roughness, or a high surface hardness, and is difficult to slip with the disk D, and can impart a strong transport force to the disk D. When the transport roller 6B is in strong pressure contact with the disk D, the disk D located in the housing can be reliably carried out of the insertion slot.

  The distance between the detection pins 26 and 26 shown in FIG. 1 is widened by the outer peripheral edge of the disc D to be carried out, and further closed, thereby detecting that the disc D has been carried out and stopping the apparatus.

  In this disk apparatus, as shown in FIG. 4, the support member 42B can rotate around a central shaft 43B located between the rotation shaft 6A0 and the rotation shaft 6B0. Is strongly pressed against the disk D, and the conveying roller 6B is pressed strongly against the disk D when the disk is unloaded. In this way, when the disc is carried in and out, one of the transport rollers is always strongly pressed against the disc D, so that the disc D can be reliably carried in and out.

  Further, the conveyance roller 6A has a small contact area with the disk D and a small conveyance force applied to the disk D, but has a strong dust adsorption force. On the other hand, the conveyance roller 6B has a large contact area with the disk D and a small dust adsorption force, but a large frictional force is applied to the disk D, and a large conveyance force is applied to the disk D. Therefore, when the disc is carried in, it is possible to suppress the intrusion of the dust into the apparatus by strongly pressing the conveying roller 6A to remove the dust on the disc D. Further, when the disk is unloaded, the conveying roller 6B is pressed strongly to ensure unloading without leaving the disk D in the apparatus.

The bottom view which shows the mechanism unit provided in the disc apparatus of the embodiment of the present invention with the bottom surface facing the front of the paper, A partial perspective view showing a part of the mechanism unit and the transport mechanism with the bottom face down, A partially exploded perspective view showing the transport mechanism with the upper surface facing upward; FIG. 3 is a side view of the transport mechanism shown in FIG. Sectional drawing which shows a 1st conveyance roller and a sliding member

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk apparatus 2 Mechanism unit 3A Left side slider 3B Right side slider 3B1, 3B2 Cam groove 3B11, 3B21 Upper horizontal part 3B13, 3B23 Lowering restraint part 4 Rotation drive part 6A First conveyance roller 6B Second conveyance roller 6A0, 6B0 Rotating shaft 30 Link mechanism 31 Slider link 32 Reverse link 40 Conveying mechanism 41 Auxiliary guide members 43A, 43B Center shafts 44A, 44B Oscillating link 50 Recessed portion 51B on the roller surface Tension coil spring 70 Elastic support member

Claims (8)

In a disk device comprising: a rotation drive unit that drives a disk; and a transport unit that carries the disk from an insertion port to the rotation drive unit and carries the disk from the rotation drive unit to the insertion port.
Said conveying means includes a first conveying roller, the second conveying rollers located in the first said rotational driving portion than the conveying rollers of the first rotary shaft and the second conveyance of the conveying roller a support member for supporting both the rotation axis of the roller, said first said support member extends parallel to the two rotating shafts in the middle of the rotary shaft and the rotary shaft of the second conveying rollers of the conveying roller of the rocking A center axis that is movably supported ;
Rotational driving force of said central axis and biasing member for urging the disk to the first and the rotary shaft of the conveying roller and both the for carrying direction of the axis of rotation of the second conveying rollers out direction a power transmission mechanism for giving synchronization and a slider for switching two posture of the conveying rollers have been found provided,
When the disk is loaded and unloaded, the two rotating shafts are not restrained by the slider, the two conveying rollers are pressed against the disk, and when the loading of the disk is completed, the slider moves, 2. A disk device according to claim 1, wherein the two rotating shafts are retracted in a direction away from the disk by a descending restraint provided on the slider .   When both the rotating shafts are driven to rotate in the direction of loading the disk, a moment in a direction in which the first conveying roller is strongly pressed against the disk acts on the support member, and both the rotating shafts The disk device according to claim 1, wherein when being driven to rotate in the unloading direction, a moment in a direction in which the second conveying roller is strongly pressed against the disk acts on the support member.   The disc transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disc transport force by the one transport roller when dust adheres to the surface of one transport roller. 3. The disk device according to claim 1, wherein the disk device is larger.   When the surface of one transport roller is uneven, the surface of the other transport roller is flat or smaller than the one transport roller, and the surface of the one transport roller is uneven, and dust adheres to the surface 4. The disk device according to claim 3, wherein the disk transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disk transport force by the one transport roller.   When the surface roughness of the surface of one of the conveying rollers is rougher than the surface roughness of the surface of the other conveying roller and the surface roughness of the surface is rough, the one of the conveying rollers has the surface roughness 4. The disk device according to claim 3, wherein the disk transport force by the other transport roller when dust adheres to the surface of the other transport roller is larger than the disk transport force by the other transport roller.   Disk transport by the one transport roller when the surface hardness of one transport roller is lower than the surface hardness of the other transport roller and the surface hardness of the one transport roller is low. 4. The disk device according to claim 3, wherein the disk transport force by the other transport roller when dust adheres to the surface of the other transport roller is greater than the force.   The first transport roller when dust is adhered to the surface of the first transport roller when the disk transport force by the second transport roller when dust is adhered to the surface of the second transport roller 7. The disk device according to claim 3, wherein the disk apparatus has a larger disk conveying force than the disk apparatus. The central shaft provided on the support member is supported by one end of a swinging member that swings, and the biasing force of the biasing member acts on the swinging member. The disk device according to claim 1, wherein the disk device is biased in a direction approaching the disk.

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