JP4526530B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device capable of centering a plurality of types of disks inserted from an insertion slot on a turntable.

  Conventionally, slot-in type disk devices are used as in-vehicle disk devices. In this type of disk device, a disk such as a CD or a DVD is inserted from the insertion slot on the front surface, and is transported into the device by a transport mechanism such as a roller. Then, the conveyed disk is clamped on the turntable by a clamper.

  Such a disk device is provided with a centering mechanism for centering the conveyed disk on the turntable. Centering refers to positioning the center of the disc at or near the center of the turntable. The centering mechanism is configured to abut against the edge of the disk at two positions symmetrical to the left and right with respect to the line in the conveyance direction passing through the center of the turntable, thereby positioning the center of the disk near the center of the turntable. Yes.

  By the way, a 12 cm disc is the most common size of the disc, but an 8 cm disc is also used as a disc of other sizes. Hereinafter, the former is referred to as a large diameter disk, and the latter is referred to as a small diameter disk. In the disk device corresponding to these two types of sizes, the centering mechanism needs to determine the size of the disk and switch the contact position with the disk according to the size of the disk.

In order to meet such a demand, the conventional disk device includes a pivotable left and right centering arm and a lock mechanism that locks the centering arm at a predetermined position in the front and rear. The main components of the lock mechanism include a lock arm that is rotatably attached to the tip of each centering arm, an intermediate lever that connects the left and right centering arms, and a lock member that engages the intermediate lever. In addition, a spring for urging each element is provided. With such a configuration, the left and right centering arms are locked at a predetermined position on the front side when a small-diameter disk is inserted according to the size of the disk. When a large-diameter disk is inserted, it is retracted backward and locked at a predetermined position on the rear side (see, for example, Patent Document 1).
JP 7-141745 A (page 2-3, FIG. 2)

  However, the conventional disk device has a problem in that various link elements such as a lock arm, an intermediate lever, and a lock member are required to lock the left and right centering arms, and the number of parts is large. This is undesirable because it causes the generation of rattle noise due to the complexity of the structure and the resulting decrease in productivity, the increase in size due to the increase in space, and the contact of parts.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a disk apparatus capable of centering a plurality of types of disks with a small number of parts.

  The disc device of the present invention is a disc device that centers a plurality of types of discs that are inserted from an insertion slot and transported in a transport direction on a turntable, and clamps the disc on the turntable with a clamper. A clamper base for holding the clamper, a pair of pivotable centering arms provided on the clamper base on the left and right sides with respect to the line in the transport direction passing through the center of the turntable, and the clamper base A front arm lock arrangement for guiding the pair of centering arms to center a small-diameter disk having a predetermined first diameter, and a large having a predetermined second diameter larger than the first diameter. The pair of centering arms between the rear arm lock arrangement for centering the radial disk An arm guide plate that pivots the guide arm, and the arm guide plate guides the pair of centering arms between the front arm lock arrangement and the rear arm lock arrangement, and the front arm lock arrangement and It has a cam structure which locks rotation of the pair of centering arms in the rear arm lock arrangement.

  With this configuration, the cam structure provided on the arm guide plate guides the left and right centering arms between the front arm lock arrangement corresponding to the small-diameter disk and the rear arm lock arrangement corresponding to the large-diameter disk. The centering arm is locked with the front arm lock arrangement and the rear arm lock arrangement. By providing the cam structure of the arm guide plate with the guide function and the lock function of the centering arm, the small-diameter disk and the large-diameter disk can be centered with a small number of parts.

  Further, in the disk device of the present invention, the arm guide plate is a rotating track that guides the centering arm along the rotating track corresponding to the left and right of the pair of centering arms as the cam structure. A cam and a lock control cam for controlling the rotation lock state of the centering arm, and each of the pair of centering arms has an arm rotation shaft and an arm follower pin, and the arm rotation shaft is The lock control cam is engaged, and the arm follower pin is engaged with the rotating track cam. With this configuration, the rotation guide cam and the lock control cam are provided as the cam structure on the arm guide plate, so that the guide of the centering arm and the control of the locked state can be suitably performed.

  In the disk device of the present invention, a disk contact piece is provided on each of the pair of centering arms, and the contact piece arrangement including the angle and distance of the pair of disk contact pieces is the pair of centering arms. When the arm is in the front arm lock arrangement and the small-diameter disk contacts the pair of disk contact pieces at the same time according to the curvature difference between the small-diameter disk and the large-diameter disk, the pair of disks When the contact pieces are not rotatable and the large-diameter disk is in contact with the pair of disk contact pieces at the same time, the pair of disk contact pieces are rotated about the arm follower pins. The arm guide plate is configured so that both of the pair of centering arms and the pair of disc contact pieces together with the respective arm follower Release the rotation lock of the pair of centering arms to pivot about the emission are configured to rotate about said arm pivot axis of each centering arm of said pair.

  With this configuration, by properly arranging a pair of disk contact pieces, the left and right centering arms can be rotated around the respective arm follower pins and the centering arms can be rotated according to the curvature of the disk. Thus, the centering arm can be locked and released suitably.

  Further, in the disk device of the present invention, the arm guide plate is provided so as to be slidable in the transport direction with respect to the clamper base, and the lock control cam is the centering arm centered on the arm driven pin. The position of the arm rotation shaft before and after the rotation is set as a lock position before switching and a lock release position, respectively, and the arm rotation shaft is located at the lock position before switching by at least one of the lock control cams. The arm guide plate is prevented from sliding while the arm guide plate is slidable when the arm rotation shaft moves to the unlocked position by both the left and right lock control cams. Then, the pivot lock of the centering arm is released by sliding the arm guide plate. With this configuration, it is possible to suitably lock and unlock the centering arm using the lock control cam of the arm guide plate and the slide structure.

  In the disk device of the present invention, the turning track cam has a front bent portion that restricts movement of the arm following pin along the turning track when the centering arm is in the front arm lock arrangement. The front bent portion is provided such that the arm following pin comes out of the front bent portion in accordance with the slide of the arm guide plate. With this configuration, the rotation of the centering arm can be reliably locked with the front arm lock arrangement by using the front bent portion provided on the rotation track cam.

  In the disk device of the present invention, the front bent portion has a guide shape inclined with respect to the transport direction toward the outlet of the front bent portion. With this configuration, since the inclined guide shape is provided at the front bent portion of the rotating track cam, the centering arm can be unlocked smoothly.

  Further, in the disk device of the present invention, the rotation track cam engages with the arm following pin when the centering arm rotates to the rear arm lock arrangement and restricts movement along the rotation track. And the arm pivot shaft moves to a post-switch lock position provided in the lock control cam as the arm follower pin engages the rear bend. In the rear side arm lock arrangement, the arm rotation shaft is positioned at the post-switching lock position, and the movement of the arm follower pin is restricted by the rear bent portion to lock the rotation of the centering arm. With this configuration, the centering arm can be suitably locked in the rear arm lock arrangement by appropriately setting the rear bent portion and the lock control cam provided on the rotating track cam.

  In the disk device of the present invention, at least one of the left and right lock control cams has a locking structure that locks the arm rotation shaft at the post-switching lock position, and the locking by the locking structure. A release mechanism for releasing the state when the large-diameter disk is ejected is provided. With this configuration, since the locking structure is provided on the lock control cam and the locking release mechanism is provided, the centering arm can be reliably locked and released by the rear arm lock arrangement.

  Further, the disk device of the present invention has a trigger member that detects that centering has been performed and transmits it to the clamper drive mechanism, and the trigger member serves as the release mechanism when the large-diameter disk is ejected. The centering arm moves in the unlocking direction in which the arm rotation shaft is disengaged from the locking structure and the arm follower pin comes out of the rear bent portion. With this configuration, the unlocking mechanism in the rear arm lock arrangement can be realized with a small number of parts by using the trigger member.

  The disk device of the present invention includes a pair of arm springs that urge each of the pair of centering arms toward the front arm lock arrangement, and the arm spring is a torsion spring including a coil portion and an engagement wire portion. The coil portion is attached to the centering arm, and the engagement wire portion extends from the coil portion and contacts a spring engagement boss provided on the clamp base in an unfixed state. With this configuration, the centering arm can be urged in an appropriate direction with a simple configuration using a torsion spring and a small space.

  In the disc device according to the present invention, the engagement line portion is bent in the urging direction. With this configuration, the centering arm can be biased in an appropriate direction by effectively applying the torsional biasing force of the arm spring. In this configuration, the bent shape of the engagement line portion not only biases the centering arm toward the front arm lock arrangement, but also ensures the locked state in the rear arm lock arrangement.

  In the disk device of the present invention, the centering arm is sandwiched between the clamper base and the arm guide plate, and the arm guide plate places the centering arm between the rotating track cam and the lock control cam. The centering arm has a spring mounting boss at a position exposed at the window, and a coil portion of the arm spring is attached to the spring mounting boss. With this configuration, the arm spring can be provided in a small space, which can contribute to the downsizing of the disk device.

  In the present invention, an arm guide plate is provided on a clamper base, and the left and right centering arms are guided between the front arm lock arrangement and the rear arm lock arrangement by the cam structure of the arm guide plate, and the left and right centering arms are arranged by the cam structure. By locking the arm with the front arm lock arrangement and the rear arm lock arrangement, it is possible to provide a disk device having an effect that a plurality of types of disks can be centered with a small number of parts.

  Hereinafter, a disk device according to an embodiment of the present invention will be described with reference to the drawings.

  A disk device according to an embodiment of the present invention is shown in FIGS. FIG. 1 shows the entire disk device. In FIG. 2, the upper cover of the disk device is removed. In the present embodiment, the disk device 1 is a slot-in type disk device for vehicles. The disk device 1 is applied to, for example, a car audio or navigation device, an AV device having a display, or an AV device connectable to a display device. The disk device 1 is configured to be able to use two types of disks such as a 12 cm disk and an 8 cm disk. In the following, a 12 cm disk is referred to as a large diameter disk, and an 8 cm disk is referred to as a small diameter disk.

  In FIG. 1 and FIG. 2, the disk device 1 has a thin box-shaped housing 3, and a turntable 5 is provided in the approximate center of the housing 3. One side surface of the housing 3 is provided with an insertion port 7 having a shape elongated in the horizontal direction, and a conveyance roller as a conveyance mechanism extends in the horizontal direction between the insertion port 7 and the turntable 5. 9 is provided. In addition, a clamper mechanism 11 is provided in the upper part of the housing 3. The clamper mechanism 11 is also provided with the centering mechanism of the present embodiment. The disc inserted from the insertion port 7 is conveyed toward the back of the housing 3 by the conveying roller 9, and centering and clamping are performed by the clamper mechanism 11.

  As shown in FIG. 2, in the following description, the side of the insertion slot 7 is referred to as “front” and the back side of the housing 3 is referred to as “rear” with reference to the disc transport direction. Further, “left” and “right” refer to directions when the rear side is viewed from the front side. In addition, the side close to the line in the conveyance direction passing through the center of the turntable 5 is referred to as “inside” or “center side”, and the side far from the center line to the left and right is referred to as “outside”.

  The clamper mechanism 11 includes a clamper base 13, and a disc-shaped clamper 15 is held at the tip of the clamper base 13. The clamper 15 is rotatably held by a holding plate attached to the tip of the clamper base 13. The clamper base 13 can be turned up and down around the rear end. The clamper 15 faces the turntable 5. When the disc is clamped, the clamper base 13 is rotated, the clamper 15 is lowered, and the disc is sandwiched between the turntable 5.

  The clamper base 13 is made of sheet metal, and is a horizontally long plate-like member disposed in the rear region of the turntable 5 as shown. The centering mechanism of the present embodiment is provided using this horizontally long region. The centering mechanism of this embodiment will be described below.

  3 to 8 show the centering mechanism provided in the clamper mechanism 11. FIG. 3 is a perspective view of the clamper mechanism 11, and FIG. 4 is an exploded perspective view of the clamper mechanism 11. 5 and 6 are views of the clamper mechanism 11 viewed from the upper side (front side) and the lower side (back side) when a small-diameter disc (8 cm disc) is centered. 7 and 8 are views of the clamper mechanism 11 viewed from the upper side (front side) and the lower side (back side) when a large-diameter disc (12 cm disc) is centered. 4 to 8, the clamper 15 is omitted. In addition, in these drawings, the detailed shape is omitted or simplified as appropriate for easy understanding of the description of the centering mechanism.

  The centering mechanism generally includes a pair of pivotable centering arms 17a and 17b. The centering mechanism rotates these centering arms 17a and 17b between the front arm lock arrangement shown in FIGS. 5 and 6 and the rear arm lock arrangement shown in FIGS. In the front arm lock arrangement, the arm tip is positioned from the front center, and the small-diameter disk is positioned. In the rear arm lock arrangement, the tip of the arm is located outside the rear, and the large-diameter disk is positioned. The rotation and locking of the centering arms 17a and 17b are controlled by the arm guide plate 19. The details of the centering mechanism will be described below with reference to FIGS.

  The centering mechanism includes the pair of centering arms 17a and 17b described above, an arm guide plate 19 that guides the rotation of the centering arms 17a and 17b, and arm springs 21a and 21b that bias the centering arms 17a and 17b, respectively. Have. A trigger lever 23 for detecting the centered disc is attached to the clamper base 13, and this trigger lever 23 also functions as a part of the centering mechanism. A lever spring 25 is attached to the trigger lever 23, and the other end of the lever spring 25 is attached to the clamper base 13.

  The centering arms 17a and 17b are provided on the left and right with respect to a line in the transport direction passing through the center of the turntable. Hereinafter, when the left and right centering arms 17a and 17b are distinguished, they are referred to as a left centering arm 17a and a right centering arm 17b. Similarly, when distinguishing the left and right arm springs 21a, 21b, they are referred to as a left arm spring 21a and a right arm spring 21b.

  The left centering arm 17a is an integrally molded resin member and has a bar-shaped arm portion 31a made of a thin plate, and the arm portion 31a is bent outward in the middle. From one end of the arm portion 31a, an arm rotation shaft 33a protrudes upward. The arm rotation shaft 33a extends below the arm portion 31a, and a small flange portion 35a is provided at the lower end of the arm rotation shaft 33a. Further, an arm driven pin 37a protrudes upward from the other end of the arm portion 31a. The arm follower pin 37a also extends below the arm portion 31a, and a disk contact piece 39a is provided at the lower end of the arm follower pin 37a.

  Furthermore, a spring mounting boss 41a protrudes upward from a substantially central portion of the arm portion 31a, and a spring mounting hook 43a is provided in the vicinity of the spring mounting boss 41a and on the tip side. Further, as shown in FIG. 6, a rod-like branch 45 extends from the disk contact piece 37 a toward the rear trigger lever 23.

  The right centering arm 17b has a substantially symmetric shape with the left centering arm 17a. Similarly to the left centering arm 17a, the arm portion 31b, the arm rotation shaft 33b, the flange portion 35b, the arm follower pin 37b, and the disk contact. The configuration includes a piece 39b, a spring mounting boss 41b, and a spring mounting hook 43b. However, unlike the branching portion 45 provided on the left centering arm 17a, the same branching portion is not provided on the right centering arm 17b.

  The arm guide plate 19 is a plate member made of resin and has a horizontally long shape that covers most of the region of the clamper base 13. The centering arms 17 a and 17 b are sandwiched between the clamper base 13 and the arm guide plate 19.

  The arm guide plate 19 is provided so as to be slidable with respect to the clamper base 13 in the disc transport direction (front-rear direction). As a configuration for sliding, the clamper base 13 is provided with guide pins 51 projecting from two places at the front and rear of the substantially center. Further, the arm guide plate 19 has guided grooves 53 at two positions before and after the central portion (the guided groove on the rear side is hidden in the figure). Both guided grooves 53 and both guide pins 51 engage with each other, whereby the arm guide plate 19 slides in the transport direction. Further, the arm guide plate 19 is regulated so as not to float upward by four hooks 55 provided on the clamper base 13.

  The arm guide plate 19 is provided with a cam structure which will be described below. This cam structure guides the centering arms 17a and 17b between the front arm lock arrangement and the rear arm lock arrangement described above, and the front side. The rotation of the centering arms 17a and 17b is locked by the arm lock arrangement and the rear arm lock arrangement.

  The arm guide plate 19 has left and right turning track cams 61a and 61b and left and right lock control cams 63a and 63b corresponding to the left and right centering arms 17a and 17b as cam structures for realizing the above functions. . The rotation track cams 61a and 61b are cams that guide the centering arms 17a and 17b along the rotation track as a main function, and the lock control cams 63a and 63b are rotations of the centering arms 17a and 17b as a main function. It is a cam that controls the dynamic lock state. The arm follower pins 37a and 37b of the centering arms 17a and 17b are engaged with the rotation track cams 61a and 61b, and the arm rotation shafts 33a and 33b are engaged with the lock control cams 63a and 63b. The arm follower pins 37a and 37b are controlled and moved by the rotation track cams 61a and 61b, and the arm rotation shafts 33a and 33b are controlled by the lock control cams 63a and 63b, thereby moving the centering arms 17a and 17b. Are locked in the front arm lock arrangement and the rear arm lock arrangement and rotate between the arrangements.

  Hereinafter, when the left and right turning track cams 61a and 61b are distinguished, they are referred to as a left turning track cam 61a and a right turning track cam 61b. Similarly, when distinguishing the left and right lock control cams 63a and 63b, they are referred to as a left lock control cam 63a and a right lock control cam 63b.

  The left turning trajectory cam 61a is an elongated hole, and has a substantially arc shape extending from a start point near the front center to an end point near the rear side. The arm follower pin 37a is fitted in the elongated hole of the left turning track cam 61a, and thereby the arm follower pin 37a moves along the left turning track cam 61a.

  A front bent portion 71a is provided at the end of the left turning track cam 61a near the front center. In the front bent portion 71a, the left turning track cam 61a is bent backward. The front bent portion 71a is set to a size that allows the arm driven pin 37a to be fitted. The front bent portion 71a has an inclined portion 73a toward the outlet of the front bent portion 71a. When the centering arm 17a is in the front arm lock arrangement, the arm driven pin 37a is fitted into the front bent portion 71a.

  A rear bent portion 75a is provided at the rear outer end of the left turning track cam 61a. In the rear bent portion 75a, the left turning track cam 61a is bent outward. The rear bent portion 75a is also set to a size that allows the arm driven pin 37a to be fitted. When the left centering arm 17a is in the rear arm lock arrangement, the arm driven pin 37a is fitted into the rear bent portions 75a and 75b.

  The right turning track cam 61b has a substantially symmetric shape with the left turning track cam 61a, has a substantially arc shape similar to the left turning track cam 61a, and further has a front bent portion 71b and a rear bent portion. It has a portion 75b, and an inclined portion 73b is provided in the front bent portion 71b. The arm follower pin 37a fits in the front bent portion 71b in the front arm lock arrangement, and fits in the rear bent portion 75b in the rear arm lock arrangement.

  The left lock control cam 63a is provided on the rear side closer to the center than the left turning track cam 61a. The left lock control cam 63a is also an elongated hole, and the arm rotation shaft 33a is fitted into this hole, whereby the arm rotation shaft 33a moves along the left lock control cam 63a.

  In the left lock control cam 63a, a pre-switching lock position 81a is set at the rear and outer end. When the left centering arm 17a is in the front arm lock arrangement, the arm rotation shaft 33a is positioned at the pre-switching lock position 81a. The left lock control cam 63a extends obliquely inward and forward from the pre-switching lock position 81a, starting from the pre-switching lock position 81a, and this oblique part has an arc shape in detail. Further, the left lock control cam 63a is bent and extends forward, and this portion (a portion extending forward from the bent portion) is referred to as a lock release position 83a. Further, the left lock control cam 63a extends forward and then bends outward to reach the end point switching lock position 85a. When the left centering arm 17a is in the rear arm lock arrangement, the arm rotation shaft 33a is located at the post-switching lock position 85a.

  The left lock control cam 63a has a locking structure 87a at the post-switching lock position 85a. The locking structure 87a is a portion perpendicular to the transport direction. The movement of the arm rotation shaft 33a is restricted by the locking structure 87a, whereby the arm rotation shaft 33a is locked at the post-switching lock position 85a.

  The right lock control cam 63b has a substantially symmetric shape with the left lock control cam 63a, and similarly to the left lock control cam 63a, a pre-switch lock position 81b, a lock release position 83b, and a post-switch lock position 85b are set. Has been. The arm rotation shaft 33b is positioned at the pre-switching lock position 81b in the front arm lock arrangement, and is positioned at the post-switching lock position 85b in the rear arm lock arrangement.

  However, the difference from the left lock control cam 63a is that no locking structure is provided at the post-switching lock position 85b of the right lock control cam 63a. Instead, the switching lock position 85b is provided with an inclined portion 87b inclined with respect to the transport direction.

  The cam shape of the arm guide plate 19 has been described above. On the other hand, the clamper base 13 has arc-shaped long holes 91a and 91b at positions corresponding to the rotating track cams 61a and 61b. When the centering arms 17a and 17b rotate, these elongated holes 91a and 91b become passages for the support shaft portions (lower half portions of the arm driven pins 37a and 37b) of the disk contact pieces 39a and 39b.

  Further, the clamper base 13 has openings 93a and 93b at positions corresponding to the lock control cams 63a and 63b. The flanges 35a and 35b at the lower ends of the arm rotation shafts 33a and 33b are engaged with the edges of the openings 93a and 93b. The openings 93a and 93b also engage with the flanges 35a and 35b to guide the arm rotation shafts 33a and 33b, and also function as a butting portion that regulates the movement of the arm rotation shafts 33a and 33b.

  Next, the disk contact pieces 39a and 39b at the tips of the centering arms 17a and 17b will be described. The disk contact pieces 39a and 39b are provided integrally with the centering arms 17a and 17b.

  FIG. 9 shows an arrangement including the positions and angles of the disk contact pieces 39a, 39b when the centering arms 17a, 17b are in the front arm lock arrangement. When the small-diameter disk contacts the disk contact pieces 39a and 39b at the same time, the contact position of the small-diameter disk is the same position as the arm driven pins 37a and 37b. In this case, the disk contact pieces 39a and 39b do not rotate around the arm driven pins 37a and 37b.

  On the other hand, when the large diameter disk comes into contact with the arm driven pins 37a and 37b at the same time, the contact position of the large diameter disk is located outside the arm driven pins 37a and 37b. In this case, the disk contact pieces 39a and 39b rotate about the arm driven pins 37a and 37b, and the centering arms 17a and 17b also rotate about the arm driven pins 37a and 37b.

  Next, the left and right arm springs 21a and 21b will be described. The arm springs 21a and 21b are torsion springs. The left arm spring 21a has a coil portion 101a. The coil portion 101a is attached to a spring attachment boss 41a provided at a substantially central portion of the arm portion 31a of the left centering arm 17a.

  One end of the left arm spring 21a is attached to a spring attachment hook 43a on the distal end side of the arm in the vicinity of the spring attachment boss 41a. The portion on the other end side of the left arm spring 21a is the engagement line portion 103a of the present invention. The engagement line portion 103 a extends from the coil portion 101 a and engages with a spring engagement boss 105 a provided on the clamp base 13. The spring engaging boss 105a is configured by a burring hole with a curled tip. The engagement line portion 103a is fitted under the curled portion of the spring engagement boss 105a, thereby contacting the spring engagement boss 105a in an unfixed state.

  In the state of FIG. 5, the engagement line portion 103a extends rearward and outward, and urges the spring engagement boss 105a rearward and inward, and the reaction force causes the left arm spring 21a to move the left centering arm 17a. Energizing toward the front arm lock arrangement. The engagement line portion 103a has a shape that is bent rearward and inward as the biasing direction.

  The spring mounting boss 41a and the spring mounting hook 43a protrude upward from the arm portion 31a of the left centering arm 17a. The arm guide plate 19 is provided with a window 107a so as to avoid the spring mounting boss 41a and the spring mounting hook 43a. The window 107a is a relatively large opening provided between the turning track cam 61a and the lock control cam 63a. Thereby, the left centering arm 17a is exposed at the portions of the spring mounting boss 41a and the spring mounting hook 43a, and interference between the spring mounting boss 41a and the spring mounting hook 43a and the arm guide plate 19 is avoided. In this embodiment, the left arm spring 21a can be installed in a small space by adopting the torsion spring and its installation structure as described above.

  The right arm spring 21b has a substantially symmetric shape with the left arm spring 21a, and similarly to the left arm spring 21a, has a coil portion 101b and an engagement wire portion 103b, and the coil portion 101b is attached to the spring mounting boss 41b. One end is attached to the spring attachment hook 43b, and the engagement line portion 103b is engaged with the spring engagement boss 105b of the clamper base 13. Further, like the left arm spring 21a, the engagement line portion 105b of the right arm spring 21b is also bent rearward. Further, the spring mounting boss 41 b and the spring mounting hook 43 b are exposed from the window portion 107 b of the arm guide plate 19.

  Next, the trigger lever 23 will be described. The trigger lever 23 is a resin rod-like member and has a function of transmitting to the clamper driving mechanism that the small-diameter disk or the large-diameter disk has been centered.

  Referring to FIG. 6, the trigger lever 23 is disposed on the lower side (back side) of the arm guide plate 19 so as to extend in the lateral direction. The tip of the trigger lever 23 is located inside and behind the disk contact piece 39a, and the other end of the trigger lever 23 is engaged with the rear end of the slider 111 provided on the left side of the arm guide plate 19. Yes. The slider 111 is slidable back and forth along the side wall of the housing 3 and constitutes a clamper driving mechanism. When the slider 111 is pushed by the trigger lever 23 and slides forward, the clamper mechanism 11 operates.

  The trigger lever 23 has a long hole 113 near the tip. A branch portion 45 extending rearward from the disc contact piece 39a of the left centering arm 17a is engaged with the elongated hole 113. Although not shown, a pin protruding upward from the tip of the branch portion 45 is fitted in the elongated hole 113. One end of a lever spring 25 is attached to the trigger lever 23, and the other end of the lever spring 25 is attached to the clamp base 13. The lever tip end is biased forward by the lever spring 25 with the rear end of the lever as a fulcrum.

  In the above configuration, the trigger lever 23 forms a link mechanism together with the left centering arm 17a and the like. In the front arm lock arrangement, this link mechanism positions the tip of the trigger lever 23 at a place where it is lightly pressed by the edge of the small-diameter disk during centering. When the left centering arm 17a rotates, the link mechanism between the left centering arm 17a and the trigger lever 23 functions, and the trigger lever 23 moves. In the rear arm lock arrangement, the tip of the trigger lever 23 is positioned where it is lightly pressed by the edge of the large-diameter disk during centering.

  In addition, the trigger lever 23 has a protrusion 115 in the vicinity of the rear end. The protrusion 115 has an inclined surface 117 inclined in the transport direction. Further, a step portion 119 is provided near the center of the trigger lever 23. As will be described later, the protrusion 115 is pushed by a push member (not shown) that moves rearward together with the slider 111 when releasing the clamp of the large-diameter disk, and moves the trigger lever 23 inward. As a result, the left centering arm 17a is moved inward by being pushed by the edge of the elongated hole 113 of the trigger lever 23 and the step 119.

  The configuration of the disk device according to the present embodiment has been described above. Next, the operation of the disk device will be described. Here, the centering operation by the centering mechanism of the disk device will be mainly described.

  First, the state of the centering mechanism before the disc is inserted will be described. Before the disc insertion, the centering mechanism is in the same state as when the small-diameter disc shown in FIGS. 5 and 6 is centered. At this time, the centering arms 17a and 17b are in the front arm lock arrangement, and the disk contact pieces 39a and 39b are positioned forward. The arm follower pins 37a and 37b are fitted in the front bent portions 71a and 71b of the rotation track cams 61a and 61b, and the arm rotation shafts 33a and 33b are the lock positions 81a before switching at the rear ends of the lock control cams 63a and 63b, 81b.

  Next, the centering operation of the small-diameter disk (8 cm disk) will be described with reference to FIGS. As shown in FIGS. 10A and 10B, it is assumed that the small-diameter disk has been inserted and transported at a position shifted from the center of the turntable 5. In the illustrated example, the small-diameter disk is shifted to the right.

  In this case, the small diameter disk first comes into contact with the end of the disk contact piece 39b of the right centering arm 17b. The disk contact portion 39b is pushed by the small-diameter disk to be conveyed and rotates around the arm follower pin 37b as shown in FIGS. 11 (a) and 11 (b), whereby the right centering arm 17b. Is also rotated around the arm follower pin 37b, and the arm rotation shaft 33b is moved from the pre-switching lock position 81b to the lock release position 83b in the lock control cam 63b.

  At this time, on the left side, the left centering arm 17a is in the original arrangement, and the arm rotation shaft 33a is located at the pre-switching lock position 81a. The arm rotation shaft 33a cannot move in the front-rear direction within the left lock control cam 63a, and the arm guide plate 19 is prevented from sliding. In this state, the rearward movement of the arm rotation shaft 33a is restricted by the rear edge of the opening 93a of the arm guide plate 19.

  If the arm guide plate 19 cannot slide, the right centering arm 17b stops at the position shown in FIG. 11 (a) and cannot be rotated any further. Further, the arm driven pin 37b cannot come out of the front bent portion 71b, and therefore the right centering arm 17b cannot be rotated.

  Thus, when the small-diameter disk contacts only the right disk contact piece 39b, the disk contact piece 39b rotates at the same position around the arm driven pin 37b, and the arm rotation shaft 33b at the other end of the arm locks. Although it moves to the release position 83b, the arm follower pin 37b cannot come out of the front bent portion 71b, and therefore the right centering arm 17b cannot be rotated around the arm rotation shaft 33a, and the rotation lock The state is not released.

  As described above, the right centering arm 17b does not rotate beyond the angle shown in FIG. 11A even when pressed by the small-diameter disk. When the small-diameter disk is further conveyed and proceeds backward, the small-diameter disk is guided by the inclined surface of the disk contact piece 39b and proceeds inward. As the small-diameter disk advances inward, the right centering arm 17b is biased by the right arm spring 21b and returns to its original position.

  The small-diameter disk is guided to the slope of the disk contact piece 39b and reaches a position where it contacts the disk contact pieces 39a and 39b simultaneously. At this time, as described with reference to FIG. 9, the small-diameter disk contacts the disk contact pieces 39a and 39b at positions corresponding to the arm driven pins 37a and 37b.

  The small-diameter disk is positioned on the turntable 5 when it contacts the disk contact pieces 39a and 39b at the same time. As a result, the small-diameter disk is centered. When the small-diameter disk is centered, the edge of the small-diameter disk pushes the tip of the trigger lever 23, the slider 111 moves forward, the clamper mechanism 11 operates, the clamper base 13 rotates, and the clamper 15 descends. Then, the small diameter disk is clamped.

  The operation from the centering to the clamp will be described in more detail with reference to FIG. 12. At the time of centering, that is, at the time when the small-diameter disk is in contact with the centering arms 17a and 17b, the disk center is shifted slightly behind the table center. Yes. When the clamper 15 is lowered in this state, the center hole of the disk slides on the oblique shoulder of the turntable 5, the disk moves slightly forward and fits into the turntable 5, and the center of the disk and the center of the table finally coincide. . Since the disc comes out a little earlier by this clamping operation, the disc contact pieces 39a, 39b and the disc are slightly separated. FIG. 6 shows the clamp completion state. As described above, within the scope of the present invention, centering may position the disk center in the vicinity of the table center within a clampable range.

  The centering operation of the small diameter disc has been described above. In the above example, the small-diameter disc was inserted at a position shifted to the right. The centering operation when the small-diameter disc is inserted at a position shifted to the left side is the same. However, the centering operation is reversed on the left and right. Further, when the small-diameter disk is inserted from the center, the small-diameter disk is centered without undergoing the one-side arm rotation operation as described above.

  Next, the centering operation of the large-diameter disk (12 cm disk) will be described with reference to FIGS. As shown in FIG. 13B, when the large-diameter disk has been conveyed, the large-diameter disk simultaneously contacts the end portions of the disk contact pieces 39a and 39b on both sides. When the large-diameter disk is further conveyed, as shown in FIG. 14B, the disk contact pieces 39a and 39b rotate about the arm driven pins 37a and 37b. The centering arms 17a and 17b are also rotated around the arm driven pins 37a and 37b, whereby the arm rotation shafts 33a and 33b are moved from the pre-switching lock positions 81a and 81b to the lock release positions 83a and 83b. Move each one.

  Here, when the small-diameter disk was inserted, only the right centering arm 17b was rotated, so that the arm guide plate 19 was prevented from sliding and the rotation lock was not released. On the other hand, when a large-diameter disk is inserted, the left and right centering arms 17a and 17b rotate together, and the arm rotation shafts 33a and 33b move to the lock release positions 83a and 83b. Accordingly, the lock control cams 63a and 63b do not restrict the sliding of the arm guide plate 19, and the arm guide plate 19 can be slid.

  The slidable arm guide plate 19 is pushed by the arm driven pins 37a and 37b and slides backward. In response to the slide of the arm guide plate 19, the arm follower pin 37a and the arm follower pin 37b come out from the front bent portions 71a and 71b of the rotary track cams 61a and 61b. As a result, the centering arms 17a and 17b are not restricted from turning, and can be turned around the arm turning shafts 33a and 33b. Thus, the lock in the front arm lock arrangement of the centering arms 17a and 17b is released.

  The above operation will be described in more detail. The large-diameter disk advances in the transport direction and pushes the inclined disk contact pieces 39a and 39b backward and outward. Since this force works, the arm follower pins 37a and 37b push the front bent portions 71a and 71b of the rotating track cams 61a and 61b backward and outward. As a result, the arm guide plate 19 slides rearward, and the arm driven pins 37a and 37b move outward and can come out of the front bent portions 71a and 71b.

  As described above, the front bent portions 71a and 71b have inclined portions 71a and 71b extending obliquely with respect to the transport direction. Thereby, the arm follower pins 37a and 37b can smoothly come out of the front bent portions 71a and 71b.

  Further, when the arm rotation shafts 33a and 33b move in the lock control cams 63a and 63b, the flange portions 35a and 35b at the lower ends of the arm rotation shafts 33a and 33b are connected to the openings 93a and 93b of the arm guide plate 19, respectively. Continue to engage the edge. When the arm rotation lock is released, the flange portions 35a and 35b abut against the arm guide plate 19, thereby restricting the positions of the arm rotation shafts 33a and 33b and the arm guide plate 19 in the front-rear direction.

  Thus, the rotation lock in the front arm lock arrangement is released. As described above, when unlocking, the centering arms 17a and 17b rotate around the arm driven pins 37a and 37b. Then, the rotation lock is released, and the centering arms 17a and 17b rotate about the arm rotation shafts 33a and 33b. In this embodiment, two types of cams are provided, and the arm operation is controlled so that the rotation fulcrum is switched halfway as the large-diameter disk advances, and the arm rotation lock is released. Yes. The configuration using such a cam structure eliminates the need for a lock plate as used in the prior art, and can realize the arm rotation lock and release thereof with a small number of parts.

  As shown in FIGS. 15 (a) and 15 (b), after the lock in the front arm lock arrangement is released, the large-diameter disk is further conveyed and pushed by the large-diameter disk to be centering arms 17a and 17b. Rotate. The large-diameter disk contacts the end portions of the disk contact pieces 39a and 39b and pushes them outward. The trigger lever 23 is pushed by the left centering arm 17a and moves backward so as to escape from the large-diameter disk.

  16A and 16B, as a result of the centering arms 17a and 17b being pushed against the large-diameter disk, the arm driven pins 37a and 37b reach the rear ends of the rotary track cams 61a and 61b. When the large-diameter disk is further conveyed, as shown in FIGS. 17A and 17B, the disk contact pieces 39a and 39b are pushed outward, and the arm follower pins 37a and 37b are turned into the orbital cam 61a. 61b are fitted into the rear bent portions 75a and 75b. At this time, the arm rotation shafts 33a and 33b of the centering arms 17a and 17b move outward following the disk contact pieces 39a and 39b, and reach the lock positions 85a and 85b after switching of the lock control cams 63a and 63b. . During this operation, the arm guide plate 19 slides further rearward than during rotation. The arm rotation shaft 33a is locked to the locking structure 87a of the left lock control cam 63a. Thus, the centering arms 17a and 17b are locked in the rear arm lock arrangement.

  As shown in FIG. 17A, when the centering arms 17a and 17b are in the rear arm lock arrangement, the engagement line portions 103a and 103b of the arm springs 21a and 21b are connected to the spring engagement bosses 105a of the arm guide plate 19, respectively. , 105b obliquely contacting the spring engaging bosses 105a, 105b. The reaction force of the pressing force urges the centering arms 17a and 17b toward the outside, that is, toward the rear arm lock arrangement.

  Here, it is the lateral component of the reaction force that urges the centering arms 17a and 17b outward. In the present embodiment, since the engagement line portions 103a and 103b of the arm springs 21a and 21b are bent rearward, the angles of the engagement line portions 103a and 103b are changed, and the lateral component force is increased. (By bending, the angle of the engagement line portions 103a and 103b with respect to the left-right direction is increased, thereby increasing the lateral component force). As a result, the force for urging the centering arms 17a and 17b outward increases, and the centering arms 17a and 17b are more reliably locked in the rear arm lock arrangement.

  As described above, the locking operation to the rear arm lock arrangement is realized. As described above, according to the present embodiment, the lock to the rear arm lock arrangement is also preferably realized with a small number of parts by the structure using two types of cams.

  Almost simultaneously with the centering arms 17a and 17b being pushed by the large-diameter disk and locked to the rear arm lock arrangement, the trigger lever 23 is also pushed by the large-diameter disk. As a result, the slider 111 moves forward, the clamper mechanism 11 operates, the clamper base 13 rotates, the clamper 15 descends, and the large-diameter disk is clamped. At this time, as in the case of clamping the small-diameter disk, as shown in FIG. 12, the large-diameter disk slides on the shoulder of the turntable 5 and is clamped at a position moved slightly forward. As a result, as shown in FIG. 8, the large-diameter disk is slightly separated from the disk contact pieces 39a and 39b in the clamp completed state.

  The centering operation of the large diameter disc has been described above. Next, the unlocking operation when the large-diameter disk is ejected will be described.

  Assume that the large-diameter disc is ejected from the state of FIG. When the large-diameter disk is ejected, the clamper mechanism 11 is operated to lift the clamper 15, and the large-diameter disk is transported by the transport roller 9 and ejected. When the clamper mechanism 11 operates, the slider 111 moves backward. Then, a push member (not shown) moves rearward together with the slider 111 and pushes the protrusion 115 of the trigger lever 23. Since this protrusion 115 has the inclined surface 117, the trigger lever 23 is pushed diagonally backward and inward. As a result, the trigger lever 23 moves inward and pushes the left centering arm 17a inward. At this time, the step portion 119 of the trigger lever 23 pushes the disc contact piece 39a of the left centering arm 17a. At the same time, the edge of the elongated hole 113 of the trigger lever 23 pushes a pin provided at the tip of the branch 45 of the left centering arm 17a.

  When the left centering arm 17a is pushed by the trigger lever 23, the arm rotation shaft 33a of the left centering arm 17a moves inward in the locking release direction, and the locking structure of the lock position 85a after switching of the left lock control cam 63a. Detach inward from 87a. Further, the arm follower pin 37a is disengaged inward from the rear bent portion 75a of the left turning track cam 61a. As a result, the left centering arm 17a is unlocked, biased by the left arm spring 21a, and rotated toward the front arm lock position.

  Unlike the left side arm rotation shaft 33a, the right side arm rotation shaft 33b is positioned on the inclined portion 87b of the right lock control cam 63b and is not locked. Therefore, when the lock is released on the left side, the arm rotation shaft 33b is moved inward by the biasing force of the right arm spring 21b, the arm follower pin 37b is also moved inward, and the lock of the right centering arm 17b is also released. The right centering arm 17b is biased by the right arm spring 21b and rotates toward the front arm lock arrangement.

  Thus, when the large-diameter disk is ejected, the centering arms 17a and 17b return to the original front arm lock arrangement. The arm guide plate 19 slides forward to return to the original position, the arm rotation shafts 33a and 33b are positioned at the pre-switching lock positions 81a and 81b of the lock control cams 63a and 63b, and the arm driven pins 37a and 37b are rotated. The moving track cams 61a and 61b are fitted into the front bent portions 71a and 71b.

  As described above, in the present embodiment, by using the trigger lever 23 for both of the above-described two types of cams, the arm lock state can be released when the large-diameter disk is ejected with a small number of parts.

  The disk device 1 according to the embodiment of the present invention has been described above. According to the present embodiment, the cam structure provided on the arm guide plate 19 has the left and right centering arms 17a between the front arm lock arrangement corresponding to the small diameter disk and the rear arm lock arrangement corresponding to the large diameter disk. The left and right centering arms 17a and 17b are locked by the front arm lock arrangement and the rear arm lock arrangement. By providing the cam structure of the arm guide plate 19 with the guiding function and the locking function of the centering arms 17a and 17b, the small-diameter disk and the large-diameter disk can be centered with a small number of parts.

  In addition, according to the present embodiment, the rotation guide cams 61a and 61b and the lock control cams 63a and 63b as described above are provided on the arm guide plate 19 as a cam structure, thereby guiding the centering arms 17a and 17b. The locked state can be suitably controlled.

  Further, according to the present embodiment, as described with reference to FIG. 9, when the left and right disc contact pieces 39a and 39b are appropriately arranged, when a large-diameter disc is inserted according to the curvature of the disc. Rotates the left and right centering arms 17a and 17b around the respective arm follower pins 37a and 37b. When a small-diameter disk is inserted, the centering arms 17a and 17b can be restricted from rotating. The locking of 17a and 17b and the release thereof can be suitably performed.

  Further, according to the present embodiment, the lock control cams 63a and 63b allow the arm guide plate 19 to slide when the arm rotation shafts 33a and 33b move to the lock release positions 83a and 83b with both cams. When the arm guide plate 19 slides, the arm rotation lock is released. In this manner, the centering arms 17a and 17b can be locked and unlocked suitably using the lock control cams 63a and 63b of the arm guide plate 19 and the slide structure.

  Further, according to the present embodiment, the turning track cams 61 a and 61 b are provided with the front bent portions 71 a and 71 b for restricting the movement of the arm driven pins 37 a and 37 b, and according to the slide of the arm guide plate 19. The arm driven pins 37a and 37b are configured to come out from the front bent portions 71a and 71b. In this way, the rotation of the centering arms 17a and 17b can be reliably locked by the front arm lock arrangement by using the front bent portions 71a and 71b provided on the rotation track cams 61a and 61b.

  Moreover, according to this Embodiment, the front side bending parts 71a and 71b have the inclination parts 73a and 73b which are the guide shapes inclined with respect to the conveyance direction toward the exit of the front side bending parts 71a and 71b. Thereby, the unlocking of the centering arms 17a and 17b can be performed smoothly.

  Further, according to the present embodiment, the rear bending portions 75a and 75b are provided on the rotary track cams 61a and 61b. In the rear side arm lock arrangement, the arm rotation shafts 33a and 33b are positioned at the post-switching lock positions 85a and 85b, and the movement of the arm follower pins 37a and 37b is regulated by the rear bent portions 75a and 75b. The rotation of the arms 17a and 17b is locked. In this way, the centering arms 17a and 17b are suitably arranged in the rear arm lock arrangement by appropriately setting the rear bent portions 75a and 75b and the lock control cams 63a and 63b provided on the rotation track cams 61a and 61b. Can be locked.

  Further, according to the present embodiment, the left lock control cam 63a is provided with the locking structure 87a, and the arm rotation shaft 33a is locked by this locking structure. Also, a release mechanism is provided for releasing the locking of the arm rotation shaft 33a when the large-diameter disk is ejected. Thereby, the centering arm 17a can be reliably locked in the rear arm lock arrangement, and the lock can be released.

  Further, according to the present embodiment, the trigger lever 23 as a trigger member functions as a release mechanism, and pushes the centering arm 17a in the locking release direction when the large-diameter disk is ejected. In this way, the unlocking mechanism in the rear arm lock arrangement can be realized with a small number of parts by using the trigger member.

  Further, according to the present embodiment, the pair of arm springs 21a and 21b configured by the torsion springs as described above are provided, and the centering arm 17a has a simple configuration using the torsion springs and a small space. , 17b can be biased in an appropriate direction.

  Further, according to the present embodiment, the engagement line portions 103a and 103b of the arm springs 21a and 21b have a shape bent toward the urging direction, whereby the torsional urging force of the arm springs 21a and 21b is reduced. The centering arms 17a and 17b can be urged in an appropriate direction by acting effectively. In this configuration, not only the centering arms 17a and 17b are urged toward the front arm lock arrangement but also the locked state in the rear arm lock arrangement is ensured by the bent shape of the engagement line portions 103a and 103b. Can do.

  Further, according to the present embodiment, the centering arms 17a and 17b are sandwiched between the clamper base 13 and the arm guide plate 19, and the arm guide plate 19 is rotated by the orbital cams 61a and 61b and the lock control cams 63a and 63b. The centering arms 17a and 17b have window portions 107a and 107b for exposing the centering arms 17a and 17b. The centering arms 17a and 17b have spring mounting bosses 41a and 41b at positions exposed at the window portions 107a and 107b. Coil portions 101a and 101b of arm springs 21a and 21b are attached to 41a and 41b. Accordingly, the arm springs 21a and 21b can be provided in a small space, which can contribute to the downsizing of the disk device 1.

  As described above, the disk device 1 of the present embodiment can center a small-diameter disk and a large-diameter disk with a small number of parts, and can further obtain the following advantages. First, productivity can be improved by reducing the number of parts.

  Further, the centering mechanism can be made compact by reducing the number of parts, which can contribute to the miniaturization of the disk device 1. In particular, in the present embodiment, the arm guide plate 19 and the centering arms 17a and 17b, which are components of the centering mechanism, are placed on the clamper base 13, and the centering mechanism is housed in the clamper mechanism 11, so that the space is small. A centering mechanism can be realized.

  Furthermore, the occurrence of rattle noise due to contact of components can be reduced. In this regard, in the present embodiment, the centering mechanism has a structure in which centering arms 17a and 17b are sandwiched between the clamper base 13 and the arm guide plate 19, and these elements are configured to slide with respect to each other. Yes. With such a configuration, noise such as rattle noise can be reduced.

  In this embodiment, the small diameter disk is an 8 cm disk and the large diameter disk is a 12 cm disk. However, the disk size need not be limited to these. The dimensions of the above-described parts may be set according to the disk size.

  In the present embodiment, the disk device 1 is for a vehicle. However, the disk device 1 does not have to be for a vehicle within the scope of the present invention.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that those skilled in the art can modify the above-described embodiments within the scope of the present invention.

  As described above, the disk device according to the present invention has an effect that a plurality of types of disks can be centered with a small number of parts by the cam structure of the arm guide plate. It is useful as a slot-in type disk device for in-vehicle equipment that has high demands for performance and vibration resistance.

The perspective view of the disc apparatus in an embodiment of the invention The perspective view which decomposed | disassembled some disk apparatuses in embodiment of this invention The perspective view which shows the clamper mechanism provided in the disc apparatus Exploded perspective view showing a clamper mechanism provided in the disk device The top view of the centering mechanism in the front arm lock arrangement The bottom view of the centering mechanism in the front arm lock arrangement The top view of the centering mechanism in the rear arm lock arrangement The bottom view of the centering mechanism in the rear arm lock arrangement The figure which shows the contact position relationship between the disk contact piece on both sides and the disk in the front arm lock arrangement (A) First view of the centering mechanism when centering a small-diameter disk as viewed from above (b) First view of the centering mechanism when centering a small-diameter disk as viewed from below (A) 2nd figure which looked at the centering mechanism at the time of centering of a small diameter disk from the upper side (b) 2nd figure which looked at the centering mechanism at the time of centering of a small diameter disk from the lower side Diagram explaining operation when clamping to turntable (A) 1st figure which looked at the centering mechanism at the time of centering of a large diameter disk from the upper side (b) 1st figure which looked at the centering mechanism at the time of centering of a large diameter disk from the lower side (A) 2nd figure which looked at the centering mechanism at the time of centering of a large diameter disk from the upper side (b) 2nd figure which looked at the centering mechanism at the time of centering of a large diameter disk from the lower side (A) Third view of the centering mechanism when centering a large-diameter disk as viewed from above (b) Third view of the centering mechanism when centering a large-diameter disk as viewed from below (A) 4th figure which looked at the centering mechanism at the time of centering of a large diameter disk from the upper side (b) 4th figure which looked at the centering mechanism at the time of centering of a large diameter disk from the lower side (A) 5th figure which looked at the centering mechanism at the time of centering of a large diameter disk from the upper side (b) 5th figure which looked at the centering mechanism at the time of centering of a large diameter disk from the lower side

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 5 Turntable 11 Clamper mechanism 13 Clamper base 17a Left centering arm 17b Right centering arm 19 Arm guide plate 21a Left arm spring 21b Right arm spring 23 Trigger lever 33a, 33b Arm rotation shaft 37a, 37b Arm driven pin 39a, 39b Disc Contact piece 61a Left turning orbit cam 61b Right turning orbit cam 63a Left lock control cam 63b Right lock control cam

Claims (12)

A disk device for centering a plurality of types of disks inserted from an insertion port and transported in a transport direction on a turntable, and clamping the disk on the turntable with a clamper,
A clamper base holding the clamper;
A pair of pivotable centering arms respectively provided on the clamper base on the left and right with respect to the line in the transport direction passing through the center of the turntable;
A front arm lock arrangement provided on the clamper base for guiding the pair of centering arms to center a small-diameter disk having a predetermined first diameter, and a predetermined second diameter larger than the first diameter. An arm guide plate for rotating the pair of centering arms between a rear arm lock arrangement for centering a large-diameter disk having
The arm guide plate guides the pair of centering arms between the front arm lock arrangement and the rear arm lock arrangement, and the pair of centering arms is arranged in the front arm lock arrangement and the rear arm lock arrangement. A disc device characterized by having a cam structure for locking the rotation of the centering arm. The arm guide plate has, as the cam structure, a turning track cam for guiding the centering arm along a turning track corresponding to the left and right of the pair of centering arms, and the turning of the centering arm. A lock control cam for controlling the lock state,
Each of the pair of centering arms has an arm rotation shaft and an arm driven pin, the arm rotation shaft engages with the lock control cam, and the arm driven pin engages with the rotation track cam. The disk device according to claim 1, wherein the disk device is a disk drive. Disc contact pieces are provided on each of the pair of centering arms,
The contact piece arrangement including the angle and distance of the pair of disk contact pieces is based on the difference in curvature between the small diameter disk and the large diameter disk when the pair of centering arms are in the front arm lock arrangement. When the small-diameter disk contacts the pair of disk contact pieces simultaneously, the pair of disk contact pieces cannot rotate, and the large-diameter disk contacts the pair of disk contact pieces simultaneously. In this case, the pair of disk contact pieces are set so as to rotate around the respective arm follower pins,
The arm guide plate releases the rotation lock of the pair of centering arms when both of the pair of centering arms rotate together with the pair of disk contact pieces around the arm driven pins. 3. The disk device according to claim 2, wherein the pair of centering arms are configured to be rotated about the respective arm rotation shafts. The arm guide plate is slidable in the transport direction with respect to the clamper base,
The lock control cam includes at least one of the locks with the position of the arm rotation shaft before and after the rotation of the centering arm about the arm follower pin as a pre-switching lock position and a lock release position, respectively. The arm guide plate is prevented from sliding when the arm rotation shaft is positioned at the pre-switching lock position by the control cam, and the arm rotation shaft is moved to the unlock position by both the left and right lock control cams. The center guide arm is unlocked when the arm guide plate slides, and the centering arm is unlocked when the arm guide plate slides. Disk unit.   The rotating track cam has a front bent portion that restricts movement of the arm following pin along the rotating track when the centering arm is in the front arm lock arrangement, and the front bent portion is 5. The disk device according to claim 4, wherein the arm follower pin is provided so as to come out of the front bent portion according to the slide of the arm guide plate.   The disk device according to claim 5, wherein the front bent portion has a guide shape inclined with respect to the transport direction toward an outlet of the front bent portion.   The rotating track cam has a rear bent portion that engages with the arm follower pin and restricts movement along the rotating track when the centering arm rotates to the rear arm lock arrangement, The arm rotation shaft moves to a post-switching lock position provided in the lock control cam as the arm follower pin engages with the rear bent portion, and in the rear side arm lock arrangement, 7. The rotation of the centering arm is locked by positioning the arm rotation shaft at the lock position after switching and restricting the movement of the arm following pin by the rear bent portion. The disk device according to any one of the above. At least one of the left and right lock control cams has a locking structure that locks the arm rotation shaft in the locked position after switching,
The disk device according to claim 7, further comprising a release mechanism that releases a locking state by the locking structure when the large-diameter disk is ejected.   A trigger member that detects that centering is performed and transmits the detected signal to a clamper driving mechanism, and the trigger member serves as the release mechanism, and the arm rotation shaft is configured to be the locking structure when the large-diameter disk is ejected. 9. The disk device according to claim 8, wherein the centering arm is moved in the unlocking direction in which the arm follower pin is detached from the rear bent portion and the arm driven pin is detached from the rear bent portion.   Each of the pair of centering arms is provided with a pair of arm springs for urging the pair of centering arms toward the front arm lock arrangement, and the arm springs are torsion springs having a coil portion and an engagement wire portion, 10. The device according to claim 2, wherein the engaging wire portion extends from the coil portion and is in contact with a spring engaging boss provided on the clamp base in an unfixed state. The disk device described in 1.   The disk device according to claim 10, wherein the engagement line portion has a shape bent in an urging direction.   The centering arm is sandwiched between the clamper base and the arm guide plate, and the arm guide plate has a window portion that exposes the centering arm between the rotating track cam and the lock control cam, 12. The disk apparatus according to claim 10, wherein the centering arm has a spring mounting boss at a position exposed at the window, and a coil portion of the arm spring is mounted on the spring mounting boss.

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