JP2006065978A - Changer type disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "changer type disk device" capable of preventing a non-circular irregular shape disk from being pulled into a chassis. <P>SOLUTION: The changer type disk device is provided with a disk carrying mechanism 5 including: a first guide body 11 in which a plurality of driving pulley 13 including a first driving pulley 13a on the front side are arranged in a row; a second guide body 12 having a guide groove 21a; and a guide body interval changing means for changing the facing interval between the guide bodies 11 and 12, wherein both the sides of the periphery part of the inserted disk are held between the driving pulley 13 and the guide groove 21a so that the automatic carriage is performed by the rotational driving force of the driving pulley 13. By the abutment of the periphery part of the inserted disk against the first driving pulley 13a axially supported by a rotary lever 15, the rotary lever 15 is rotated so that a detection switch 20 is turned on. It is determined whether the inserted disk is the irregular shape disk or not, on the basis of both the output signals of the detection switch 20 and an optical sensor 19 mounted on the rotary lever 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a changer-type disk device capable of reproducing and / or recording information on a disk such as a CD (compact disk) or a DVD (digital versatile disk) and storing a plurality of disks in the apparatus. In particular, the present invention relates to a slot-in type changer-type disk device that automatically conveys a disk inserted from an insertion slot to a predetermined position.

  In an in-vehicle changer disk device, a slot-in method in which a disk inserted from an insertion port is automatically transported to a predetermined position by a disk transport mechanism is often used. Such a changer-type disk device is provided with a disk storage section that can hold a plurality of disks arranged in the thickness direction at the back of the housing, and the selected disk in the disk storage section is played by a disk transport mechanism. After being transported to the position, the drive unit reproduces and / or records information by using an optical pickup or the like while rotating the disk chucked on the turntable.

Conventionally, as the disk transport mechanism described above, a plurality of drive pulleys are arranged in a row on a base plate and a drive force is applied to the peripheral edge of the disk, and the peripheral edge of the disk is transported in the transport direction. There is widely known a configuration in which a second guide body provided with a guide groove that is guided along is arranged oppositely so as to be movable in the proximity and separation directions (see, for example, Patent Document 1). In such a disc transport mechanism, each drive pulley is rotated in the same direction with the disc sandwiched between the drive pulley and the guide groove so that the disc is transported while rolling along the guide groove. In order to prevent the disc and the optical pickup from coming into contact with the first and second guide bodies during the play operation, the distance between the two guide bodies is widened via a motor, a rack, or the like.
JP 2002-117609 A (page 4-7, FIG. 2)

  Incidentally, discs such as CDs and DVDs are disk-shaped recording media having a circular appearance, but in recent years, irregularly shaped discs having a non-circular appearance such as a star shape or a heart shape are on the market. There is also a possibility that a deformed disk is loaded into the changer disk device. Here, the conventional changer type disk device described above employs a disk transport mechanism in which the outer edge of the disk is transported by being sandwiched between the drive pulley and the guide groove, and is driven while the deformed disk is being inserted. If the pulley gets stuck in the recess on the outer edge of the irregular shaped disk, the drive pulley slips in the concave and the conveying force is not transmitted to the irregular shaped disk, so the irregular shaped disk is actively pulled into the housing under normal use conditions. It will never be. However, even though the drive pulley slips and the deformed disk stops, if the user forcibly pushes the deformed disk, the deformed disk passes through the slip portion and is driven into the housing by the driving force of the drive pulley. There is a problem that the irregularly shaped disk cannot be ejected from the casing even after the ejection operation.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide a changer-type disk device that can prevent a non-circular deformed disk from being drawn into a housing.

  The present invention relates to a disk transport for automatically transporting a disk sandwiched between a drive pulley arranged in a row on a first guide body and a guide groove provided on a second guide body by a driving force of the drive pulley. By adopting a mechanism, the optical sensor mounted on at least one of the first and second guide bodies is positioned in the disk transport path to monitor the shape of the peripheral edge of the disk.

  According to the changer-type disk device of the present invention, when a deformed disk having a non-circular appearance is inserted into the housing from the insertion port, the output of the optical sensor mounted on at least one of the first and second guide bodies. Since the signal changes, processing such as stopping or discharging the deformed disk can be performed by stopping or rotating the drive pulley based on the output signal of the optical sensor. Therefore, even if the user mistakenly inserts the deformed disk, the deformed disk is not completely pulled into the housing, and the worst situation in which the deformed disk cannot be ejected from the housing can be prevented. .

  The present invention includes a housing provided with an insertion port for inserting and ejecting a disc, a disc storage portion provided at the back of the housing, in which a plurality of discs are held side by side in the thickness direction, A drive unit that reproduces and / or records information with respect to a disk disposed at a play position in the housing, and a disk transport mechanism that transports the disk between the insertion slot and the disk storage unit. The disk transport mechanism includes a first guide body that arranges a plurality of drive pulleys in a row and applies a driving force to the peripheral edge of the disk, and a guide groove that guides the peripheral edge of the disk. A second guide body disposed opposite the guide body, and guide body interval changing means for changing the distance between the two guide bodies by moving the first and second guide bodies in the approaching and separating directions. The drive In a changer-type disk device in which a disk sandwiched between a roller and the guide groove is conveyed by the driving force, an optical sensor is mounted on at least one of the first and second guide bodies. The sensor is positioned in the disk conveyance path so as to monitor the shape of the peripheral edge of the disk.

  In the changer-type disk device configured as described above, when a deformed disk having a non-circular appearance is inserted into the housing from the insertion port, the optical sensor mounted on at least one of the first and second guide bodies is used. Since the output signal changes, processing such as stopping or discharging the deformed disk can be performed by stopping or rotating the drive pulley based on the output signal of the optical sensor. Therefore, even if the user mistakenly inserts the deformed disk, the deformed disk is not completely pulled into the housing, and the worst situation in which the deformed disk cannot be ejected from the housing can be prevented. .

  In the above configuration, a transmissive optical sensor can be used as the optical sensor, but a reflective optical sensor is preferable in consideration of installation space. Further, the optical sensor may be mounted in the vicinity of the guide groove of the second guide body, but it is preferable that the optical sensor is mounted in the first guide body and positioned in the vicinity of the drive pulley. .

  In this case, the rotating lever that pivotally supports the first driving pulley that is closest to the insertion port among the plurality of driving pulleys, and the direction in which the first driving pulley is moved toward the second guide body. It is preferable to provide a return spring that urges the rotation lever and a detection switch that is turned on by the rotation of the rotation lever, and the optical sensor is preferably mounted on the rotation lever. By adopting the process, the optical sensor output signal is validated only when the detection switch is turned on by the insertion of the disk, including whether the disk has been pulled out during insertion or not. It is possible to accurately determine whether the disc is a deformed disc.

  The embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the internal mechanism of the changer-type disk device with the internal mechanism omitted, and FIG. 3 is an explanatory diagram of the internal mechanism on the upper chassis side showing a state in which the disc is stored in the stocker, FIG. 4 is an explanatory diagram of an internal mechanism on the upper chassis side, showing a state where the disc is being transported to the play position, and FIG. FIG. 6 is a perspective view of the main part of the disk transport mechanism, FIG. 7 is an explanatory view showing the movement of the drive pulley and the optical sensor when the disk is inserted, and FIG. 8 is the disk. It is explanatory drawing which shows the track | orbit of the optical sensor with respect to the external shape.

  The changer type disk device according to this embodiment can reproduce a disk D (small diameter disk) having an outer diameter of 8 cm and a disk D (large diameter disk) having a diameter of 8 cm, and accommodates a plurality of large diameter disks D. Thus, this is a slot-in type disk reproducing apparatus capable of selectively reproducing one of the disks D. This device is for in-vehicle use corresponding to the 1DIN size, and anti-vibration measures are taken to avoid sound skipping during the play operation.

  As shown in FIG. 1, the changer-type disk device includes a box-shaped housing 1 and a nose member 2 disposed on the front surface of the housing 1, and the nose member 2 has an insertion port 2a. Has been established. The insertion port 2a can be opened and closed by a door member (not shown), and the disk D is inserted and ejected through the insertion port 2a. The housing 1 is composed of an upper chassis 3 and a lower chassis 4, and both the chassis 3 and 4 are integrated using a plurality of screws (not shown). 2 to 6 show a state in which the upper chassis is viewed from the lower surface side. On the upper chassis 3 side, a disk storage mechanism 6 that occupies the inner part of the housing 1 is provided. The disc transport mechanism 5 transports the disc D between the insertion slot 2a and the play position and between the play position and the disc storage portion 6. On the other hand, a drive unit 7 and a drive drive mechanism 8 are provided on the lower chassis 4 side, and an optical pickup, a turntable, a clamper and the like (not shown) are disposed in the drive unit 7. The drive unit 7 can be reciprocated between a retracted position and a drive position in the housing 1 by the drive drive mechanism 8, and is arranged at the play position when the drive unit 7 is at the drive position as shown in FIG. The information can be read by an optical pickup while the disc D is rotated by a turntable. Further, as a countermeasure against vibration, the drive unit 7 is supported by a damper mechanism (not shown) during the play operation. The drive unit 7 is normally located at the drive position shown in FIG. 5, and moves to the retracted position only when a disk stored in the disk storage unit 6 is selected.

  The disk storage unit 6 includes a large-diameter gear 30 that is rotationally driven using a motor (not shown) as a drive source, and four that are rotationally driven by the large-diameter gear 30 having spiral grooves with unequal pitches. A feed screw member 31 and a plurality of arcuate stockers 32 capable of holding the outer peripheral edge of the disk D over about a half circumference are disposed, and each of the feed screw members is arranged in the plurality of stockers 32 arranged in a stacked state. Each stocker 32 that holds the disk D can be moved up and down in the axial direction of the feed screw member 31 by inserting and screwing 31 and rotating these feed screw members 31 synchronously.

  As shown in FIG. 6, the disk transport mechanism 5 includes first and second guide bodies 11 and 12 slidable in a direction orthogonal to the transport direction of the disk D. The interval can be changed by a guide body interval changing means including a motor (not shown) and the first and second slide plates 17 and 18.

  The first guide body 11 includes a plurality of drive pulleys 13 having grooves into which the peripheral edge of the disk D is inserted, and a plurality of drive gears 14 for applying a driving force to each drive pulley 13. 14 is rotated by using the motor 10 as a drive source. The drive pulley 13 and the drive gear 14 are arranged in a row and are pivotally supported by the first slide plate 17. The first-stage drive pulley (the first stage drive pulley (positioned closest to the insertion direction of the disk D) ( Hereinafter, this is referred to as a first drive pulley and is denoted by reference numeral 13a) and is pivotally supported by a rotation lever 15. The rotation lever 15 is a rotation shaft of a drive gear 14 that meshes with the first drive pulley 13a. Is rotatable with respect to the first slide plate 17. In addition, the last stage drive pulley (reference numeral 13b) located at the innermost position with respect to the insertion direction of the disk D is also attached to the first slide plate 17 around the rotation axis of the drive gear 14 meshing with the drive pulley 13b. It can be rotated.

  The rotating lever 15 is urged in the clockwise direction of FIG. 6 by a spring (return spring) 16, and can be brought into and out of contact with a stopper (not shown) provided on the first slide plate 17. Yes. The rotating lever 15 is equipped with an optical sensor 19 capable of monitoring the shape of the peripheral edge of the inserted disk D. The optical sensor 19 is located in the conveyance path of the disk D on the side of the first drive pulley 13a. positioned. The optical sensor 19 is a reflection type optical sensor in which a light emitting element and a light receiving element are integrated like a photo interrupter. As will be described later, whether the peripheral portion of the disk D faces the optical sensor 19 by a detection signal of the light receiving element. It can be determined whether or not. The first drive pulley 13a can be brought into contact with the peripheral edge of the disk D inserted into the housing 1, and when the first drive pulley 13a is pressed by the insertion force of the disk D, the rotation lever 15 rotates counterclockwise in FIG. 6 against the spring force of the spring 16, and the detection switch 20 mounted on the first slide plate 17 is turned on by this rotation of the rotation lever 15 (switching operation). It has come to be.

  On the other hand, the second guide body 12 has a long transport guide body 21 fixed to the second slide plate 18, and the transport guide body 21 extends linearly along the transport direction of the disk D. A guide groove 21a is formed. Further, a determination member 22 is rotatably supported by the second slide plate 18, and a closing arm 22a formed at the front end of the determination member 22 can enter and exit the guide groove 21a. Yes. The determination member 22 rotates when the peripheral edge of the disk D inserted into the housing 1 comes into contact with the closing arm 22a, and another detection switch (not shown) is turned on by the rotation of the determination member 22. It has become. The detection switch and the output signal of the above-described detection switch 20 are taken in by a control unit (not shown), and the control unit drives a motor (not shown) and each driving pulley which are driving sources of the guide body interval changing means based on these output signals. The rotation of the motor 10 which is a drive source of 13 is controlled.

  Next, the operation of the changer-type disk device configured as described above will be described. FIG. 6 shows a standby state before an arbitrary disk D (small diameter disk or large diameter disk) is inserted into the housing 1. In addition, the first and second guide bodies 11 and 12 are in the closest positions, and the first drive pulley 13a of the first guide body 11 and the transport guide body 21 of the second guide body 12 are small-diameter disks D. It is opposed at an interval narrower than the diameter.

  In such a standby state, for example, when the user inserts the large-diameter disk D into the housing 1 from the insertion port 2a of the nose member 2, both sides of the peripheral edge of the disk D are connected to the first drive pulley 13a as shown in FIG. The rotating lever 15 that abuts against the guide groove 21a and pivotally supports the first drive pulley 13a by the further insertion force of the disk D rotates in the counterclockwise direction of FIG. Since the detection switch 20 is turned on by the rotation of the rotation lever 15, a control unit (not shown) starts rotating the motor 10 in one direction based on the ON signal of the detection switch 20, and the motor 10 As shown, each drive pulley 13 (13a, 13b) rotates in the clockwise direction in FIG. Therefore, when the peripheral edge of the disk D comes into contact with the first drive pulley 13a in the first stage, a rotational driving force in the direction in which the disk D is pulled into the housing 1 is applied to each drive pulley 13. Thus, both sides of the peripheral edge of the disk D can be smoothly inserted between the guide groove 21a of the transport guide body 21 and each drive pulley 13 by using this rotational driving force.

  At this time, since the peripheral portion on the left side of the disc D contacts the blocking arm 22a and presses it outward, the determination member 22 rotates clockwise in FIG. 2 to turn on a detection switch (not shown). . That is, both the detection switch and the above-described detection switch 20 are turned on when both sides of the peripheral edge of the disk D come into contact with the first drive pulley 13a and the guide groove 21a. Based on the ON signal, it is recognized that the disk D has been inserted between the first drive pulley 13a and the guide groove 21a, and a motor (not shown) that is a drive source of the guide body interval changing means is started to rotate. The facing distance between the first and second guide bodies 11 and 12 is increased.

  At that time, when the inserted disk is a large-diameter disk D as shown in FIG. 2, the control unit controls the rotation of the motor so as to widen the facing distance between the first and second guide bodies 11 and 12 to a predetermined size. Then, since the opposing distance between the first and second guide bodies 11 and 12 is expanded to the outer dimension of the large-diameter disk D by the insertion force of the disk D, both sides of the peripheral edge of the disk D are connected to the first drive pulley 13a. It will be in the state where it was pushed and pinched between the guide grooves 21a. As a result, the disk D receives the rotational driving force from each drive pulley 13 and is automatically conveyed along the guide groove 21a of the conveyance guide body 21 to the inner part of the housing 1, as shown in FIG. It is held by the stocker 32 of the disk storage unit 6 disposed on the rear side of the housing 1. Further, when the inserted disc is a small-diameter disc D, when the opposing distance between the first and second guide bodies 11 and 12 is increased to a predetermined size by the control unit, the pivot that supports the first drive pulley 13a is supported. The lever 15 and the determination member 22 on the second guide body 12 side return to the state before the disk D is inserted, and both the detection switch 20 and the detection switch (not shown) are switched to the OFF state. The rotation of the motor is controlled so that the facing distance between the first and second guide bodies 11 and 12 matches the outer dimension of the small-diameter disk D.

  When a desired selected disk D is played from the plurality of disks D held in each stocker 32 in this way, first, the drive unit 7 is moved to the retracted position close to the insertion slot 2a by the drive drive mechanism 8. In this state, the stocker 32 holding the desired selected disk D is raised or lowered to the same height as the transport path of the disk D by appropriately rotating the feed screw member 31 in a predetermined direction. Next, after the drive unit 7 is moved from the retracted position to the drive position indicated by the two-dot chain line in FIG. 5, the first and second guide bodies 11 and 12 are moved in directions close to each other. Then, as shown in FIG. 3, a desired disk D selected between the innermost drive pulley 13b and the guide groove 21a of the guide body 21 is sandwiched, and in this state, the innermost drive pulley 13b is inserted into the disk D. As shown in FIG. 4, the selected disk D is pulled out from the stocker 32 to the play position. At this time, since the drive unit 7 stands by at the drive position, the turntable mounted on the drive unit 7 enters the center hole of the disk D pulled out to the play position, and further the clamper moves in a direction closer to the turntable. As a result, the disk D is chucked between the turntable and the clamper. Thereafter, as shown in FIG. 5, the first and second guide bodies 11 and 12 are moved in the directions farthest from each other, and the drive pulleys 13 and the guide bodies 21 are retracted to the outside of the disk D. In this state, the disk D is rotationally driven by the turntable, and a play operation is performed in which information on the disk D is read by the optical pickup. At this time, since the drive drive mechanism 8 and the drive unit 7 are supported by the damper mechanism, sound skipping or the like occurs during a play operation of reading information on the disk D by the optical pickup of the drive unit 7. It has become difficult.

  In addition, when the disk D is inserted, the optical sensor 19 monitors the peripheral shape of the inserted disk D, and the control unit described above drives the drive pulley based on the output signals of both the optical sensor 19 and the detection switch 20. 13 rotation is controlled. That is, in the standby state before inserting the disk D, the first drive pulley 13a and the optical sensor 19 are located on the innermost side (the second guide body 12 side), and both the optical sensor 19 and the detection switch 20 are present. Both are off. When the disk D is inserted into the housing 1 from this standby state, as shown in FIG. 7, the peripheral edge of the disk D comes into contact with the first drive pulley 13a, and the rotation lever 15 rotates accordingly. The switch 20 is turned on. When the disk D is further inserted in the direction of the arrow X in FIG. 7, the first drive pulley 13a and the optical sensor 19 move in the direction of the arrow Y with the rotation of the rotation lever 15, and the maximum diameter portion of the disk D is the first drive. When passing through the pulley 13a, the first drive pulley 13a and the optical sensor 19 move to the outermost side. During this time, the optical sensor 19 moves in the direction of the arrow Y while facing the peripheral edge of the disk D. Therefore, in FIG. 8, the position where the first drive pulley 13a abuts on the disk D and starts to move is indicated by P1, Assuming that the position where the drive pulley 13a has moved to the outermost side is P2, the optical sensor 19 moves on the track T connecting P1 and P2 with respect to the disk D inserted in the arrow X direction.

  Here, when the inserted disc is a normal disc D (small-diameter disc or large-diameter disc) having a circular appearance, the optical sensor 19 moves on the track T located inside the outer shape of the disc D. Therefore, the light emitted from the light emitting element of the optical sensor 19 is reflected by the peripheral edge of the disk D being inserted and received by the light receiving element, and an ON signal is output from the optical sensor 19. On the other hand, as shown by a broken line in FIG. 8, when the inserted disk is a deformed disk having a non-circular appearance, a position where the trajectory T of the optical sensor 19 is located outside the outer shape of the deformed disk (for example, Since P3) occurs, the light emitted from the light emitting element of the optical sensor 19 at that location does not return to the light receiving element, and an off signal is output from the optical sensor 19. When the ON signal is output from each of the optical sensor 19 and the detection switch 20, the control unit described above determines that the inserted disk is a circular disk D, and controls the rotation of the motor 10 as usual. It is automatically conveyed to the inner part of the housing 1 by the driving force of the driving pulley 13. If the optical sensor 19 is turned off while the ON signal is output from the detection switch 20, the control unit determines that the inserted disk is a deformed disk. In this case, the rotation of the motor 10 is stopped. Processing such as stopping the drawing operation of the irregularly shaped disk or forcibly ejecting the irregularly shaped disk by controlling the rotation of the motor 10 in the opposite direction to normal is performed.

  In the case of the present embodiment, as shown in FIG. 8, the range until the inserted large-diameter disk D is automatically conveyed by the driving force of the driving pulley 13 is about 66 °, and the disk is a deformed disk within this range. It is possible to accurately determine whether or not. Therefore, even if the user mistakenly inserts the deformed disk, the deformed disk can be prevented from being completely drawn into the housing 1, and the worst situation in which the deformed disk cannot be ejected from the housing 1 is the worst situation. Does not occur. Further, when the user inserts the disk D by a predetermined amount and then pulls it out halfway, the optical sensor 19 that has been turned on until then is turned off. Since the spring 16 returns to the initial position, the detection switch 20 is also switched from on to off. Therefore, the control unit can accurately determine the shape of the inserted disc, including whether the disc has been pulled out halfway.

  In the above embodiment, the case where the reflection type optical sensor is used as the optical sensor has been described. However, it is also possible to use a transmission type optical sensor. What is necessary is just to oppose and arrange | position through a path | route.

It is sectional drawing which abbreviate | omits and shows the internal mechanism of the changer type disc apparatus which concerns on an Example. It is internal mechanism explanatory drawing by the side of the upper chassis which shows the state at the time of a disk insertion start. It is internal mechanism explanatory drawing by the side of the upper chassis which shows the state which accommodated the disk in the stocker. It is internal mechanism explanatory drawing by the side of the upper chassis which shows the state which is conveying the disk to a play position. It is internal mechanism explanatory drawing by the side of the upper chassis which shows the state at the time of play operation | movement. It is a principal part perspective view of a disk conveyance mechanism. It is explanatory drawing which shows the motion of the drive pulley and optical sensor accompanying insertion of a disk. It is explanatory drawing which shows the track | orbit of the optical sensor with respect to the external shape of a disk.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Nose member 2a Insertion port 3 Upper chassis 4 Lower chassis 5 Disk conveyance mechanism 6 Disk storage part 7 Drive unit 8 Drive drive mechanism 10 Motor 11 1st guide body 12 2nd guide body 13 Drive pulley 13a 1st Drive pulley 14 Drive gear 15 Rotating lever 16 Spring (return spring)
17 first slide plate 18 second slide plate 19 optical sensor 20 detection switch 21 transport guide body 21a guide groove 22 determination member

Claims (3)

A housing provided with an insertion slot for inserting and ejecting a disc, a disc storage portion provided at the back of the housing for holding a plurality of discs side by side in the thickness direction, and a play in the housing A drive unit for reproducing and / or recording information with respect to a disk disposed at a position, and a disk transport mechanism for transporting the disk between the insertion slot and the disk storage portion. A plurality of drive pulleys arranged in a row and having a first guide body for applying a driving force to the peripheral edge of the disk, and a guide groove for guiding the peripheral edge of the disk, facing the first guide body And a guide body interval changing means for changing the distance between the two guide bodies by moving the first and second guide bodies in the approaching and separating directions, and the drive pulley. And before In changer type disc apparatus nipped the disks so as to convey by the driving force between the guide grooves,
A changer type disk characterized in that an optical sensor is mounted on at least one of the first and second guide bodies, and the optical sensor is positioned in the disk transport path to monitor the shape of the peripheral edge of the disk. apparatus.   2. The changer-type disk device according to claim 1, wherein the optical sensor is mounted on the first guide body and positioned in the vicinity of the drive pulley. The rotation lever that pivotally supports the first drive pulley that is closest to the insertion port among the plurality of drive pulleys, and the first drive pulley is moved toward the second guide body. A changer comprising: a return spring that pivotally biases the pivot lever in a direction; and a detection switch that is turned on by the pivot of the pivot lever, wherein the optical sensor is mounted on the pivot lever. Type disk unit.

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