JP4076545B2 - Disc recording medium processing apparatus - Google Patents

Description

  The present invention is used in, for example, audio equipment, video equipment, information equipment, communication equipment, measurement equipment, etc., and is a technical field of a disk recording medium processing apparatus that performs processing such as recording and reproduction on a disk such as a CD or a DVD. In particular, the present invention belongs to the technical field of a disk recording medium processing apparatus that can be transported while sandwiching the outer periphery of the disk and can be compactly formed.

  For example, in audio equipment, various disc recording / playback apparatuses using a CD on which a large number of songs are recorded have been developed. As an example of such a conventional disk recording / reproducing apparatus, an apparatus main body having a disk insertion / extraction port, a traverse unit that is disposed in the apparatus main body and performs at least one of recording, erasing and reproduction on the disk, A disc transport means for transporting a disc partially inserted into the disc insertion / extraction opening into the apparatus main body and discharging a disc in the apparatus main body from the disc insertion / extraction outlet to the outside of the apparatus main body, The disk transport means is provided at least in the apparatus main body so as to be able to rotate, and a first disk transport arm having a driving roller that is rotationally driven by a motor at the tip and sandwiches the outer peripheral edge of the disk, and is rotatable in the apparatus main body. And a second disk transport arm having a driven roller that sandwiches the outer peripheral edge of the disk at the tip. A disk recording medium processing apparatus has been proposed that transports a disk by rotating the first and second disk transport arms while sandwiching the outer peripheral edge of the disk by a driving roller and a driven roller (for example, Patent Documents). 1).

According to the disk recording and / or reproducing apparatus disclosed in Patent Document 1, since the pair of driving rollers and the driven roller contact only the outer peripheral edge of the disk, the disk is transported without damaging the recording surface of the disk. be able to.
Japanese Patent Application Laid-Open No. 2002-334507 (for example, paragraph numbers [0155] to [169], FIGS. 27 and 28, etc.).

  By the way, in the disk recording medium processing apparatus disclosed in the above-mentioned Patent Document 1, the disk partially inserted into the disk insertion / extraction port is sandwiched and conveyed to the store position in the apparatus body, and the disk at the store position is removed. Since only a part of the disk that is sandwiched and ejected from the disk insertion / extraction port is required, not only another transport means for transporting the disk between the store position and the traverse unit is required, but also the traverse unit. Requires another means for centering the disc with respect to the disc. For this reason, the configuration is complicated and the number of parts increases, and it is difficult to form the apparatus compactly.

Also, since the disk needs to be transported between the disk insertion / extraction port and the store position, transported between the store position and the traverse unit, and the centering of the disk with respect to the traverse unit is required, the transport control of the disk becomes troublesome. Become.
Further, since the outer peripheral edge of the disk is sandwiched between the driving roller and the driven roller, the disk can be sandwiched, but the disk is sandwiched between two rollers that rotate together, so that the disk has a stable posture. It is even more desirable to pinch with.

  The present invention has been made in view of such circumstances, and an object thereof is to more easily and flexibly perform transport control of disks having different diameters while protecting the recording surface of the disk, and more It is an object of the present invention to provide a disk recording medium processing apparatus that can be formed more compactly.

To attain the above object, the invention of claim 1, an apparatus main body having an outlet preparative disc inserted, is disposed in the apparatus main body, a recording for any diameter disk 8cm and diameter 12cm, Clamper support means for clamping the disc to a traverse unit that performs at least one of erasing and reproduction, and the disc having either a diameter of 8 cm or a diameter of 12 cm partially inserted into the disc insertion / extraction port. A disk recording medium comprising at least disk conveying means for conveying a part of the disk in the apparatus main body to the outside from the disk insertion / extraction port and control means for controlling the disk conveying means In the processing apparatus, the disk transport means is at least rotatable relative to the apparatus main body. Three first to third has a disk transfer arm, said first and second disk transfer arm provided and conveyed by sandwiching the outer peripheral edge of the disk in the apparatus main body is, the disk insertion An arm that pulls the disk partially inserted into the take-out port into the apparatus main body and discharges a part of the disk in the apparatus main body from the disk insert / eject port to the outside; A transport arm transports the disk drawn into the apparatus main body by the first and second disk transport arms to a centering position for clamping the disk to the traverse unit together with the first and second disk transport arms. And the disc at the centering position is moved to the first and second disc transporting arms. Wherein a disk insertion preparative arm for conveying towards the outlet, before Symbol third disc transport arm has a two first and second arm members which are foldable connected to each other with said first arm A member is rotatably supported by the apparatus main body, and the second arm member is connected to the first arm member so as to be rotatable with respect to the first arm member and to be relatively rotatable with respect to the first arm member. serial second arm member is to support the circumferential edge of the disk is drawn into the apparatus main body by the disk insertion preparative inserted from the outlet and the first and second disk transfer arm in the first one place, the disc by the relative rotation with respect to the insertion direction of the first a over arm member in response to movement of, are set so as to sandwich at two positions at least when the disk is centered It is characterized by that.

According to the invention of claim 2, the amount of rotation of the first arm member is set according to the size of the diameter of the disk, and the two places where the second arm member clamps the outer peripheral edge of the disk are It is set according to the amount of rotation of the first arm member.
Further, the invention of claim 3, after the disc is clamped by the clamper, when said first arm member is the second arm member pivots spaced from the outer periphery of said disc, said first arm It is set to rotate relative to the member in the direction opposite to the rotation direction of the third disk transport arm .

According to the disk recording medium processing apparatus of the present invention configured as described above, any one of the disks having a diameter of 8 cm and a diameter of 12 cm drawn into the apparatus main body by the first and second disk transport arms is used for the first and second disks. A third disk transport arm for transporting the disk together with the disk transport arm to the centering position for clamping the disk to the traverse unit and transporting the disk at the centering position together with the first and second disk transport arms toward the disk insertion / extraction port ; 1 and a second arm member that has a foldable structure. In this case, the first arm member is rotatably supported by the apparatus main body, and the second arm member is rotatably connected to the first arm member so as to be rotatable together with the first arm member. The second A over arm member of the third disk transfer arm to support the circumferential edge of the disk inserted from the takeout disk insertion in the first one place, then to sandwiched two positions at least when the disc is centered It has to. Therefore, the disk can be stably held and the disk can be reliably centered. Thereby, centering of the discs having different diameters by the disc transport arm can be performed more reliably and easily.

Further, when the second A over arm member of the disk transport arm is separated from the outer peripheral edge of the disk, to the second arm member rotation direction opposite to the direction of the third disk transport arm with respect to the first A over arm member Since the transport arm is bent by relative rotation, the rotation radius of the disk transport arm can be suppressed, and the apparatus can be made more compact.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 schematically shows an embodiment of a disk recording medium processing (recording / reproducing) apparatus according to the present invention, (a) is a perspective view thereof, (b) is a diagram showing a disk insertion / extraction port, FIG. 2C is a view showing a modified example of the disc insertion / extraction port, and FIG. 2 shows a portion of the disc insertion / extraction port of the disc recording medium processing apparatus of this example, and FIG. FIG. 4B is a perspective view showing a state where the disc insertion / extraction opening is closed.

  As shown in FIG. 1A, the disk recording medium processing apparatus 1 of this example is roughly divided into a disk loading / unloading section 3 provided on one end side of a rectangular apparatus main body 2 and an apparatus main body 2. And a clamper support portion 5 for supporting a clamper for clamping the disc with a traverse unit 4 provided adjacent to the disc loading / unloading portion 3 and performing at least one of recording, erasing and reproduction. As shown in an enlarged view in FIGS. 1B and 2A, in the disk loading / unloading section 3 of the disk recording medium processing apparatus 1, a slot-shaped disk insertion / extraction opening 6 is provided at one end surface of the apparatus main body 2. Is provided. The disk 7 is inserted into the apparatus main body 2 through the disk insertion / extraction opening 6 and the disk 7 inserted into the apparatus main body 2 is taken out through the disk insertion / extraction opening 6.

  As shown in FIG. 1 (b), the shape of the disc insertion / extraction opening 6 seen from the disc insertion direction is formed in a substantially rhombus shape consisting of four sides of inclined surfaces 6a, 6b, 6c, 6d having a very gentle inclination. ing. In that case, the upper and lower inclined surfaces 6a, 6c; 6b, 6d do not directly intersect with each other at the left and right ends in FIG. 1 (b) having a rhombus shape, and upper and lower sides 6e, 6f are provided. These inclined surfaces 6a, 6b, 6c, and 6d prevent the recording surface of the disk 7 from coming into contact with the inclined surfaces 6a, 6b, 6c, and 6d.

  Further, on the right end side of the lower inclined surface 6d of the disk insertion / extraction port 6, an inclined surface 6g having an inclination larger than the inclination of the inclined surface 6d and a horizontal surface 6h in FIG. 1 (b) continuing to the inclined surface 6g are provided. A disk holding member 6i is provided. The disk holding member 6i is made of an elastic material. A disc holding portion 6j that holds the disc 7 is formed by sandwiching the outer peripheral edge of the disc 7 between the upper inclined surface 6b and the lower horizontal surface 6h. In this case, when the outer peripheral edge of the disc 7 is held by the disc holding portion 6j, the disc holding member 6i is slightly elastically deformed so that the disc 7 is elastically and reliably held. Moreover, the surface along the outer peripheral edge of the disk 7 is in surface contact with the horizontal surface 6h, so that the disk 7 is stably held by the disk holding portion 6j, but the surface of the disk 7 that is in surface contact with the horizontal surface 6h is the non-recording portion. 7b (shown in FIG. 18), even if the surface of the disk 7 is in surface contact with the horizontal surface 6h, the recording of information on the disk 7 and the reproduction of the disk 7 on which the information is recorded are not affected.

  The disk holding member 6i can also be provided on the right end side of the upper inclined surface 6b or on the right end side of both the upper and lower inclined surfaces 6b and 6d. In this case, the disc holding member 6i provided on the upper inclined surface 6b is provided symmetrically with the disc holding member 6i provided on the lower inclined surface 6d. Further, as shown in FIG. 1C, the disc holding member 6i can be provided with only the inclined surface 6g by omitting the horizontal surface 6h. In this case, the outer peripheral edge of the disk 7 is sandwiched between the inclined surfaces 6b and 6g. Further, the disc holding member 6i can be provided with only the horizontal surface 6h without the inclined surface 6g. In this case, in order to reliably guide the outer peripheral edge of the disk 7 between the upper inclined surface 6b and the horizontal surface 6h, it is desirable to increase the inclination of the inclined surface 6b to some extent. However, in order to reliably guide and stably hold the outer peripheral edge of the disk 7 between the upper inclined surface 6b and the horizontal surface 6h, as shown in FIG. 1B, the disk holding member 6i has an inclined surface. It is desirable to provide 6b and a horizontal surface 6h.

  Shutters 8 for opening and closing the disk insertion / extraction opening 6 are rotatably provided on both end surfaces of the apparatus main body 2. The shutter 8 is always urged by an opening control spring 9 (shown in FIG. 16) in a direction to open the disc insertion / extraction opening 6 (that is, counterclockwise in FIG. 2A). When the disk recording medium processing apparatus is not used (that is, when the disk is not inserted), the shutter 8 is held in a state where the disk insertion / extraction opening 6 is opened as shown in FIG. The opening / closing control of the disk insertion / extraction opening 6 by the shutter 8 will be described later.

  As shown in FIG. 2A, a disk sensor 10 that detects a disk 7 inserted from the disk insertion / extraction opening 6 is provided in the apparatus main body 2 slightly inside the disk insertion / extraction opening 6. The disk sensor 10 includes, for example, a light emitting device that emits light and a light receiving device that receives light from the light emitting device. The light from the light emitting device is blocked by the inserted disc 7 and is not detected by the light receiving device. Thus, a known optical sensor for detecting the disk 7 can be used. As the disk sensor 10, any sensor can be used as long as it does not interfere with the insertion and removal operation of the disk 7 in addition to the optical sensor. In this example, a description will be given using an optical sensor as the disk sensor 10. Thus, since the well-known optical sensor 10 can use a well-known thing, description is abbreviate | omitted about the specific structure.

FIG. 3 is a plan view (top view) partially showing the disk recording medium processing apparatus in an inoperative state with the upper plate of the apparatus main body removed.
As shown in FIG. 3, a pair of first and second disk guide arms 11 and 12 constituting a disk transfer arm as a disk transfer means are rotatably provided in the apparatus main body 2 of the disk loading / unloading unit 3. It has been. As shown in FIG. 4A, the first disc guide arm 11 is provided with a support hole 14 through which the rotating shaft 13 protruding from the apparatus main body 2 penetrates at one end side. Is fitted to the rotary shaft 13 so that the first disc guide arm 11 is rotatably supported by the apparatus main body 2.

  As shown in FIG. 4B, the support hole 14 forming portion of the first disc guide arm 11 is formed in an arc shape, and a cam 16 is formed on the outer peripheral surface of the arc-shaped portion 15. The cam 16 has a cam surface 16a that is inclined so as to rise in the counterclockwise direction in FIG. As will be described later, the cam 16 constitutes a disc diameter determining means.

  As shown in FIG. 4C, a cylindrical rotating shaft 17 is provided on the arcuate portion 15 of the first disk guide arm 11 so as to protrude concentrically with the support hole 14. A gear 18 is provided integrally and over the entire circumference at the tip of the rotating shaft 17. Further, as shown in FIG. 4C, the first disk guide arm 11 is provided with two pins 19 and 20 respectively.

  As shown in FIG. 4A, on one side of the first disc guide arm 11, the disc drive roller 21 is on the other end side opposite to the support hole 14 side (that is, the first disc guide arm 11). It is located at the front end side) and is rotatably supported. The disk drive roller 21 has a guide surface that guides the outer peripheral upper edge of the disk 7 in FIG. 4A and is formed from a resin into a truncated inverted truncated cone shape, and the disk guide part 21a. A disc clamping portion 21b made of an elastic body such as rubber, which is fixed to the shaft 21a so as to be integrally rotatable, has clamping surfaces 21c and 21d made of a pair of conical surfaces, and has clamping grooves for clamping the outer peripheral upper and lower edges of the disc 7; It is made up of. Each of the pair of clamping surfaces 21c and 21d constituting the clamping groove is a curved surface that is continuous in the circumferential direction. Then, the disk drive roller 21 performs the drawing operation and the discharging operation of the disk 7 by sandwiching and rotating the outer peripheral upper and lower edges of the disk 7 between the pair of clamping surfaces 21c and 21d in the clamping groove of the disk clamping part 21b.

Thus, by providing the convex surfaces 21c ₁ , 21d ₁ and the concave surfaces 21c ₂ , 21d ₂ , the disk 7 is intermittently sandwiched between the pair of convex surfaces 21c ₁ , 21d ₁ and the convex surfaces 21c ₁ , 21d ₁ . The pair of convex surfaces 21c ₁ and 21d ₁ are intermittently sandwiched by the edge portion, and a large driving force can be transmitted to the disk 7 sandwiched from the disk driving roller 21. It can be done reliably.

  Further, as shown in FIG. 4C, a gear train 22 is provided on the other surface side opposite to the one surface side on which the disk drive roller 21 is provided in the first disk guide arm 11. The gear train 22 includes a first gear 23, a second gear 24, a third gear 25, a fourth gear 26, and a fifth gear 27. The second gear 24 is formed as a gear having a smaller diameter than the first gear 23 and is integrally formed with the first gear 23 so as to be integrated therewith. These first and second gears 23 and 22 are provided so as to be integrally rotatable around the rotation shaft 17 of the first disk guide arm 11. In that case, both the support hole 14 and the cylindrical rotating shaft 17 are rotatably fitted to the rotating shaft 13 of the apparatus main body 2.

  Further, the third gear 25 meshes with the second gear 24 and is supported by the first disk guide arm 11 so as to be rotatable. Further, the fourth gear 26 meshes with the third gear 25 so as to be rotatable. The fifth gear 27 is engaged with the fourth gear 26 and supported by the first disk guide arm 11 so as to be rotatable. The fifth gear 27 is provided so as to be coaxial with the disk drive roller 21 and integrally rotatable. The first and second gears 23 and 24, the third gear 25, the fourth gear 26, and the fifth gear 27 are in this order from the support hole 14 side toward the disk drive roller 21 in the first disk guide. The arm 11 is arranged linearly or substantially linearly along the longitudinal direction of the arm 11. The first disk guide arm 11 is always urged counterclockwise in FIG. 3 by a spring (not shown), that is, in a direction in which the disk drive roller 21 approaches a disk guide portion 33 of the second disk guide arm 12 described later. Yes. The first to fifth gears 23, 24, 25, 26, 27 do not necessarily have to be arranged linearly or substantially linearly, and may be even along the longitudinal direction within the range of the first disk guide arm 11. In other words, it can be arranged with a certain degree of deviation from the straight line.

  As shown in FIG. 5 (a), the second disc guide arm 12 has a boss portion 29 having a support hole 29a through which a rotating shaft 28 (shown in FIG. 3) projecting from the apparatus main body 2 passes on one end side. The second disc guide arm 12 is rotatably supported by the apparatus main body 2 by fitting the boss portion 29 to the rotation shaft 28. The boss portion 29 is provided with a cylindrical gear 30 concentrically and integrally with the boss portion 29.

  As shown in FIG. 5B, a switch actuator 31 is formed on the lower surface of the second disk guide arm 12 in FIG. The switch actuator 31 is formed in an arc shape concentric with the support hole 29a. Similarly, a pin 32 protrudes from the lower surface of the second disk guide arm 12.

  Further, as shown in FIG. 5A, a disc guide portion 33 is provided on the other end side of the second disc guide arm 12 so as not to rotate relative to the second disc guide arm 12. The disc guide portion 33 is provided with a first arc-shaped first guide holding portion 34 on the front end side, and extends tangentially from the first guide holding portion 34 and parallel to the disc insertion direction and the disc ejection direction on the boss portion 29 side. And a straight second guide holding portion 35. The first guide holding part 34 has a guide surface for guiding the outer peripheral upper edge of the disk 7 in FIG. 5 (a), and a disk guide part 34a formed from a resin in a part of a truncated inverted truncated cone shape. The disc holding portion 34b is made of an elastic material such as rubber and is fixed integrally with the disc guide portion 34a and has an arcuate holding groove for holding and guiding the outer peripheral upper and lower edges of the disc 7. Further, the linear guide holding portion 35 has a guide surface for guiding the upper edge of the outer periphery of the disc 7 in FIG. 5 (a) and is formed from a resin in an inclined surface, and the disc guide portion 35a has a guide surface. The disc holding portion 35b is made of an elastic material such as rubber and is fixed integrally and has a linear holding groove for holding and guiding the outer peripheral upper and lower edges of the disc 7. The first guide holding portion 34 is not necessarily formed in an arc shape, but may be formed in a linear shape that is inclined with respect to the second guide holding portion 35 so as to spread in the disc ejection direction.

Then, the outer peripheral upper and lower edges of the disk 7 are sandwiched by the arcuate clamping grooves of the first guide holding part 34 and the linear clamping grooves of the linear guide holding part 35 and guided along these grooves. ing. The convex surfaces 21c ₁ and 21d ₁ and the concave surfaces 21c ₂ and 21d ₂ of the disk drive roller 21 described above are also used in the arc-shaped holding grooves of the first guide holding portion 34 and the linear holding grooves of the linear guide holding portion 35. Convex and concave surfaces similar to those described above can be provided.

  The second disk guide arm 12 is formed by a biasing force of a spring 36 (shown in FIG. 18 described later) applied to the spring support portion 12a of the second disk guide arm 12 shown in FIG. The disk guide portion 33 is constantly urged around, that is, in the direction in which the disk guide portion 33 approaches the disk drive roller 21 of the first disk guide arm 11. In this case, the biasing force of the first disk guide arm 11 is set to be larger than the biasing force of the second disk guide arm 12 (the biasing force of the first disk guide arm 11 is 3 of the biasing force of the second disk guide arm 12). Double is desirable).

FIG. 6 is a bottom view of the disk recording medium processing apparatus with the lower plate of the apparatus body 2 removed.
As shown in FIG. 6, the apparatus main body 2 of the disk loading / unloading unit 3 is provided with a drive motor 37, and the worm 38 rotates in parallel with the rotation shaft 37 a of the drive motor 37 at a predetermined interval. It is provided as possible. A driving pulley 39 is provided on the rotating shaft 37 a of the driving motor 37, and a driven pulley 40 is provided on the worm 38. An endless belt 41 is stretched between the driving pulley 39 and the driven pulley 40 so that the rotation is decelerated from the driving pulley 39 to the driven pulley 40 and transmitted by the endless belt 41. It has become.

  Further, the worm 38 is engaged with a worm wheel 42 rotatably supported by the apparatus main body 2, and the rotation of the worm 38 is the rotation of the worm wheel 42 about the rotation axis in the direction perpendicular to the worm 38. Decelerated and converted. The rotation of the worm wheel 42 is transmitted to the first gear 23 of the gear train 22 provided on the disk drive roller 21 via an intermediate gear 43 that is rotatably supported by the apparatus main body 2. . Therefore, the rotational driving force of the drive motor 37 is the endless belt 41, the worm 38, the worm wheel 42, the intermediate gear 43, the first gear 23, the second gear 24, the third gear 25, the fourth gear 26, and the fifth gear. 27 is decelerated to the disk drive roller 21 and transmitted.

  As shown in FIG. 3, a disk holding arm 44 that constitutes a disk transfer arm as a disk transfer means is rotatably supported on the apparatus body 2. As shown in FIG. 7A, the disk holding arm 44 is roughly divided into a holding arm body 45 which is an arm member and a holding member which is an arm member connected to the holding arm body 45 by a shaft 46 so as to be relatively rotatable. It consists of an auxiliary arm 47. In this case, the holding is performed by the pin 48 projecting from the holding arm body 45 and the restriction hole 49 that is drilled in the holding auxiliary arm 47 in a circular arc shape around the shaft 46 and into which the pin 48 is fitted. The relative rotation between the arm main body 45 and the holding auxiliary arm 47 is restricted to a predetermined amount.

  A cylindrical shaft 50 having a support hole 50a is integrally protruded at the end of the holding arm body 45 opposite to the holding auxiliary arm 47 connecting side. As shown in FIG. 3, the support shaft 50 (shown in FIG. 3) erected on the apparatus main body 2 is fitted into the support hole 50a of the cylindrical shaft 50, so that the holding arm main body 45 is attached to the apparatus main body. 2 is rotatably supported. The shaft 50 is provided with a first pressing portion 52 and a second pressing portion 53 so as to be rotatable integrally with the shaft 50. In that case, the first pressing portion 52 is provided to be lower than the second pressing portion 53 and to advance counterclockwise around the shaft 50. Further, a control arm 54 is integrally provided on the shaft 50 so as to extend to the opposite side of the holding arm main body 45. Two pins 55 a and 55 b protrude from the tip of the control arm 54.

  Disc holding rollers 56 and 57 are provided at both ends of the holding auxiliary arm 47, respectively. These disk holding rollers 56 and 57 sandwich the outer peripheral end of the disk 7. The disk holding rollers 56 and 57 are rotatably supported by roller support members 58 and 59 that are integrally fixed to both ends of the holding auxiliary arm 47, respectively. These disc holding rollers 56 and 57 are centered at the position shown in FIG. 3 where the center of the disc 7 having a diameter of 8 cm (hereinafter also simply referred to as 8 cm) is a center of the turntable of the traverse unit 4. When this is done (hereinafter, this position is also referred to as the centering position), both are arranged on the arc line so as to sandwich the outer peripheral edge of the 8 cm disc 7.

Further, a pin 60 is projected from the roller support member 59. On the other hand, a switching control lever 61 is supported on the holding arm main body 45 so as to be rotatable relative to the holding arm main body 45 by a rotating shaft 62 protruding from the holding arm main body 45. A groove 63 is provided at the end of the switching control lever 61 on the holding auxiliary arm 47 side, and the pin 60 of the roller support member 59 is fitted into the groove 63. Further, end opposite to the groove 63 of the switching control lever 61 is bent into an L-shape, the bent portion is a pressed part 61a.

  The switching control lever 61 is rotated clockwise by a spring (not shown) as shown by a solid line in FIG. 7B during normal operation (that is, when the disk recording medium processing apparatus 1 in which the disk 7 is not inserted is not in operation). It is energized. As a result, the pin 48 of the holding arm main body 45 comes into contact with one end of the restriction hole 49 of the holding auxiliary arm 47, and the holding arm main body 45 and the holding auxiliary arm 47 are held in a slightly bent state. . Further, the switching control lever 61 rotates relative to the holding arm main body 45 counterclockwise from the normal state by a predetermined amount against the biasing force of the spring to rotate the pin of the holding arm main body 45. When 48 is in contact with the other end of the restriction hole 49 of the holding auxiliary arm 47, the holding arm main body 45 and the holding auxiliary arm 47 extend in substantially one circular arc shape as shown by a two-dot chain line in FIG. It is set to the state.

  The disk holding arm 44 is constantly urged clockwise in FIG. 3 by a spring (not shown). When the disk holding arm 44 is not in operation, as shown in FIG. 3, the holding auxiliary arm 47 substantially contacts the traverse unit 4 by abutting against a stopper 81 f of a slider cam member 81 (described later) that is a control member and is in an inoperative position. 3 is held at the non-operating position shown in FIG. 3 so as to correspond to the center of the turntable. In this non-operating position of the disk holding arm 44, the disk holding roller 56 on the distal end side of the auxiliary holding arm 47 is positioned closer to the disk insertion / extraction port 6 side (right side in FIG. 3) than the disk holding roller 57 on the other end side. .

  As shown in FIG. 3, the apparatus main body 2 is provided with a trigger lever 64, which is a trigger setting means, in the vicinity of the rotation shaft 51 of the disk holding arm 44 so as to be rotatable. As shown in FIG. 8, the trigger lever 64 includes a flat plate-shaped main body 65, a rotating shaft 66 projecting downward in one corner of the main body 65 in FIG. 8, and a lower corner in the other corner of the main body 65. And a pressed shaft 67 that can be brought into contact with the first and second pressing portions 52 and 53 of the disk holding arm 44 and a pressing shaft 68 that is also protruded downward at another corner of the main body 65. A cam contact portion 69 provided on the main body 65 and capable of contacting the cam surface 16a of the cam 16 of the first disc guide arm 11, and a spring support shaft 70 protruding upward from the main body 65. ing.

  And the trigger lever 64 is rotatably supported by the apparatus main body 2 by fitting the rotating shaft 66 to the cylindrical support shaft which is protrudingly provided at the apparatus main body 2 (not shown). Further, as shown in FIG. 9, a coil spring 71 is fitted and supported on a spring support shaft 70, and this coil spring 71 is contracted between the main body 65 and the upper plate of the apparatus main body 2 so that the trigger lever 64 is shown. 9 is always energized downward.

  Further, as shown in FIG. 9, the apparatus main body 2 is provided with a slider reset 72 adjacent to the trigger lever 64. The slider reset 72 is guided by a guide rail (not shown) provided on the side plate of the apparatus main body 2 so as to be linearly movable in the longitudinal direction of the apparatus main body 2, that is, in the left-right direction in FIG.

  As shown in FIG. 10, the slider reset 72 is formed in an h-shape with one end bifurcated, and a pair of guide portions 73, which are fitted to a guide rail of a protrusion provided on the side plate of the apparatus body 2. 74, a pressed portion 75 provided on the other end side and capable of abutting the pressing shaft 68 of the trigger lever 64, and a rack gear 76 formed at one end of the fork. On the lower surface of the slider reset 72 in FIG. 10, a cam 77 having a cam groove 77a is formed as shown in FIG. The cam groove 77a includes a first cam groove 77b that linearly extends upward in FIG. 11, a second cam groove 77c that linearly slopes upward from the upper end of the first cam groove 77b, and the second cam groove. The third cam groove 77d extends linearly from the upper end of 77c to the left.

  On the other hand, as shown in FIG. 11, the intermediate gear 43 is provided with a small-diameter intermediate gear 78 having a smaller diameter than the intermediate gear 43 so as to be concentric with the intermediate gear 43 and integrally rotated. Further, the apparatus main body 2 is provided with an intermediate gear 79 that is always meshed with the small-diameter intermediate gear 78 so as to be rotatable. Further, the intermediate gear 79 is provided with a slider reset driving gear 80 having a smaller diameter than the intermediate gear 79 concentrically with the intermediate gear 79 and integrally rotated. A rack gear 76 of the slider reset 72 can be engaged with the slider reset drive gear 80.

  As shown in FIG. 3, the apparatus main body 2 is further provided with a slider cam member 81 so as to be linearly movable in a direction perpendicular to the longitudinal direction of the apparatus main body 2, that is, in the vertical direction in FIG. As shown in FIGS. 11 and 12A and 12B, the slider cam member 81 is provided with a pressing portion 82 at the end on the slider reset 72 side. Also, a pin 84 is provided on an arm 83 extending in the direction orthogonal to the longitudinal direction of the slider cam member 81 and in the direction of the disc insertion / extraction opening 6 on the inner side of the pressing portion 82 so as to protrude to the opposite side of the pressing portion 82. Yes.

  Further, the slider cam member 81 is provided with a cam 85 having a cam surface 85a, and the pin 20 of the first disk guide arm 11 abuts on the cam surface 85a to control the first disk guide arm 11. The disc 7 having a large diameter of 12 cm (hereinafter also simply referred to as “12 cm”) is designed so that the centering can be positioned in an auxiliary and more accurate manner without any play. Further, the slider cam member 81 is provided with a cam 86 having a cam surface 86a, and the pin 20 of the first disk guide arm 11 contacts the cam surface 86a to control the first disk guide arm 11. ing. Further, a rack gear 87 is provided on the slider cam member 81 on the inner side of these cams 85, 86 so as to face the disk insertion / extraction port 6.

  On the other hand, a cam 89 having a cam surface 88 is provided near the end opposite to the slider reset 72 side of the slider cam member 81. The cam surface 88 is formed with a first cam surface 88a having a gently inclined surface. The second cam surface 88b is continuous with the first cam surface 88a and substantially in the horizontal direction (longitudinal direction of the slider cam member 81).

  When the second disc guide arm 12 clamps the large-diameter 12 cm disc 7, the pin 32 of the second disc guide arm 12 first comes into contact with the first cam surface 88a, and the first cam surface 88a makes a second contact. The rotation of the disk guide arm 12 is controlled. Subsequently, the pin 32 comes into contact with the second cam surface 88b, and the rotation of the second disk guide arm 12 is controlled by the second cam surface 88b.

  Further, the cam 89 is provided with a cam surface 90. The cam surface 90 is continuous with the first cam surface 90a having a gently inclined surface, and is steeper than the first cam surface 90a. The second cam surface 90b is an inclined surface, and the third cam surface 90c is an inclined surface that is continuous to the second cam surface 90b and is inclined to the same extent in the opposite direction to the second cam surface 90b.

  Then, the pin 32 of the second disc guide arm 12 first comes into contact with the first cam surface 90a, and the rotation of the second disc guide arm 12 is controlled by the first cam surface 90a. The rotation of the second disc guide arm 12 is controlled by the second cam surface 90b in contact with the cam surface 90b. Further, after the second disk guide arm 12 sandwiches the small-diameter 8 cm disk 7 and centers it with respect to the traverse unit 4, the pin 32 comes into contact with the third cam surface 90c, and the second cam guide 90 is contacted with the third cam surface 90b. By controlling the rotation of the arm 12, the second disk guide arm 12 is similarly rotated counterclockwise to separate the disk guide portion 33 of the second disk guide arm 12 from the outer peripheral edge of the 8-cm disk 7. It is like that.

  Furthermore, a shutter opening / closing control cam 91 having an inclined cam surface 91a is provided at the end of the slider cam member 81 opposite to the slider reset 72 side. This cam surface 91a is an inclined surface that proceeds downward from the end opposite to the slider reset 72 side of the slider cam member 81 in FIG. 12A, in other words, rises in FIG. 12B. Yes.

  Further, as shown in FIGS. 12B and 12C, the slider cam member 81 has a standing wall formed by being bent at a right angle to the surface on which the arm 83, the cams 85 and 86, the rack gear 87, and the cam 89 are provided. A pair of cam holes 93 and 94 are formed in 92. These cam holes 93 and 94 are both lower horizontal holes 93a and 94a in FIG. 12B and FIG. 12C, inclined holes 93b and 94b continuous with these lower horizontal holes 93a and 94a, and these It consists of upper horizontal holes 93c, 94c that are continuous with the inclined holes 93b, 94b. In this case, the inclined holes 93b and 94b are formed so as to be inclined leftward from the right end of the lower horizontal holes 93a and 94a toward the left end of the upper horizontal holes 93c and 94c in FIG. Yes. Further, the width of the inclined hole 93b is set slightly larger than the width of the inclined hole 94b, thereby preventing the movement of the traverse unit from being locked when the traverse unit moves up and down.

The slider cam member 81 is constantly urged toward a non-operating position on the slider reset 72 side (lower side in FIG. 3) by a spring (not shown). When the disk recording medium processing apparatus 1 is not in operation, the slider reset 72 is pressed upward in FIG. 11 by the pin 84 of the slider cam member 81 that contacts the cam groove 77a of the slider reset 72 as shown in FIG. Accordingly, the slider reset 72 presses the pressing shaft 68 of the trigger lever 64 upward in FIG. 11, so that the trigger lever 64 is urged counterclockwise in FIG. 3 and the pressed shaft 67 of the main body 65 in the trigger lever 64. 3 is in contact with the side plate of the apparatus body 2 as shown in FIG. 3, and the trigger lever 64 is prevented from further counterclockwise rotation. Thus, when the disk recording medium processing apparatus 1 is not operated, the trigger lever 64, the slider reset 72, and the slider cam member 81 are held at the non-operating positions shown in FIGS.
Instead of urging the slider cam member 81 toward the non-actuated position by the spring, although not shown, the slider reset 72 is always urged toward the non-actuated position on the left side in FIG. It can also be.

  Further, when the first disc guide arm 11 is in the inoperative position shown in FIG. 3, the trigger lever 64 is in the inoperative position at the lower position in the vertical direction in FIG. As described above, when the trigger lever 64 is in the non-operating position both in the vertical direction and in the rotational direction, and when the disk holding arm 44 is in the non-operating position shown in FIG. A predetermined gap α is set in the rotational direction between the pressing portion 52 and the pressed shaft 67 of the trigger lever 64. The gap α is configured such that when the small-diameter 8 cm disk 7 is inserted and the disk holding arm 44 rotates by a predetermined amount, the first pressing portion 52 and the pressed shaft 67 come into contact with each other. Further, when the trigger lever 64 and the disc holding arm 44 are in the non-operating position as described above, a predetermined gap β is set in the rotational direction also between the second pressing portion 53 and the pressed shaft 67. This gap β is larger than the gap α, and when the large-diameter 12 cm disk 7 is inserted and the disk holding arm 44 rotates by a predetermined amount larger than that of the small-diameter 8 cm disk 7, it rises with the second pressing portion 53. The pressed shaft 67 of the trigger lever 64 is in contact with the pressed lever 67.

  As described above, the gaps α and β are made different between the small-diameter 8 cm disk 7 and the large-diameter 12 cm disk 7 so that the trigger (that is, timing) for starting the movement of the slider cam member 81 is used as the large-diameter disk 7. 7 so that the centering control of the disk 7 by the slider cam member 81 after the start of the movement of the slider cam member 81 is the same for the large and small diameter disks 7. Thus, centering can be performed on the discs 7 having different diameters by the amount of rotation of the disc holding arm 44, one trigger lever 64, and one slider cam member 81.

  Further, as shown in FIG. 11, in the non-operating position of the slider cam member 81, the pin 55a of the disk holding arm 44 and the pressing portion 82 of the slider cam member 81 are separated from each other. Further, the pin 84 of the slider cam member 81 is positioned in contact with the lower end of the first cam groove 77 b of the cam groove 77 a of the slider reset 72.

  Further, as shown in FIG. 13, a gear 96 that always meshes with the intermediate gear 43 is rotatably provided in the apparatus main body 2, and a slider cam member drive gear 97 having a smaller diameter than the gear 96 is concentric with the gear 96 and It is provided so that it can rotate integrally. A rack gear 87 of the slider cam member 81 can be engaged with the slider cam member drive gear 97. FIG. 13 shows a state in which the rack gear 87 is engaged with the slider cam member drive gear 97, but this shows a state in which the slider cam member 81 is operated, and in the non-operating position of the slider cam member 81, The rack gear 87 does not mesh with the slider cam member driving gear 97 and is positioned on the left side of the slider cam member driving gear 97 in FIG.

  Further, as shown in FIG. 14, an arm synchronization member 98 as arm synchronization means is provided so as to be movable in a direction perpendicular to the longitudinal direction. Rack gears 99 and 100 are provided at both ends of the arm synchronization member 98, respectively. One rack gear 99 is always meshed with the gear 18 of the first disk guide arm 11, and the other rack gear 100 is always meshed with a gear 101 that is rotatably supported by the apparatus body 2. The gear 101 is always meshed with the gear 30 of the second disk guide arm 12. Therefore, by this arm synchronization member 98. The first and second disc guide arms 11 and 12 are synchronized with each other and rotated in opposite directions. In this case, when the disk recording medium processing apparatus 1 is not in operation, the pin 19 (shown in FIG. 4C) protruding below the first disk guide arm 11 is a stopper 81b of the slider cam member 81 (FIG. 12B). 3), the first disc guide arm 11 is held in the non-operating position shown in FIG. 3, and the second disc guide arm 12 is also shown in FIG. Retained. The arm synchronizing member 98 is supported in a groove 104 adjacent to the bottom wall 103 where the arm 83 of the slider cam member 81 shown in FIG.

  Further, as shown in FIG. 3, an auxiliary lever 105 that assists in centering the small-diameter 8 cm disk 7 is rotatably supported on the rotating shaft 28 of the apparatus main body 2. The non-spring is always biased counterclockwise in FIG. A pin 106 protrudes from the tip of the auxiliary lever 105, and this pin 106 can come into contact with the outer peripheral edge of the small-diameter 8 cm disk 7. When the disk recording medium processing apparatus 1 is not operated, the auxiliary lever 105 is held at the non-operating position by the one side edge 105a contacting the stopper 81c of the slider cam member 81 at the non-operating position. A guide pin is provided at the end of the auxiliary lever 105 opposite to the pin 106, and a guide groove for guiding the guide pin is provided in the apparatus main body 2. It can also be held in the operating position.

  As shown in FIG. 18, when the small-diameter 8 cm disk 7 is set to the centering position, the auxiliary lever 105 has the other side edge 105b substantially orthogonal to the one side edge 105a as the stopper 81d of the slider cam member 81. By abutting, it is stably held at the centering setting position.

  On the other hand, as shown in FIG. 18 described later, the apparatus main body 2 is formed with a relief portion 107 of the auxiliary lever 105. In the case of the large-diameter 12 cm disk 7, the slider cam member 81 moves greatly and the stopper 81c presses the arm portion 105c of the auxiliary lever 105, so that the auxiliary lever 105 escapes to the escape portion 107 (accommodation). To be). Thus, at the position of the relief portion 107 of the auxiliary lever 105, the pin 106 is separated from the outer peripheral edge of the large-diameter 12 cm disk 7.

  As shown in FIGS. 3 and 15, the apparatus main body 2 is provided with three first to third switches 108, 109 and 110. The first switch 108 is a switch for detecting a small-diameter 8 cm disk 7, the second switch 109 is a switch for detecting a large-diameter 12 cm disk 7, and the third switch 110 is a traverse unit for each disk 7. It is a switch that detects the clamp to In this case, both the first and second switches 108 and 109 are turned on when the switch actuator 31 of the second disk guide arm 12 presses the operating elements 108a and 109a, and the first and second switches 108 and 109 are turned on. The three switch 110 is turned on when the switch 110a of the slider cam member 81 presses the operating element 110a.

  As shown in FIG. 2, the shutter 8 has arm portions 8 a and 8 b at both ends supported by the apparatus main body 2 so as to be rotatable. As shown in FIG. 16, an opening / closing shaft 111 projects from the arm portion 8a. In addition, an opening / closing control member 112 is rotatably provided in the apparatus main body 2, and the opening / closing control member 112 is always urged clockwise in FIG. 16 by the opening control spring 9. The opening / closing control member 112 has two arms 113, 114, and one arm 113 is set to the opening / closing shaft 111 of the shutter 8 so that the shutter 8 rotates in the reverse direction when the opening / closing control member 112 rotates. Is engaged. The other arm 114 can come into contact with the cam surface 91 a of the cam 91 in the slider cam member cam 81. FIG. 16 shows a state in which the opening / closing control member 112 is rotated counterclockwise by the cam 91 and the shutter 8 closes the disc insertion / extraction port 6. However, when the disc recording medium processing apparatus 1 is not in operation, FIG. When the opening / closing control member 112 is not in contact with the cam 91 and is rotated clockwise by the opening control spring 9, the shutter 8 is in a state where the disk insertion / extraction opening 6 is opened as shown in FIG. Is set.

  As shown in FIGS. 17A and 17B, the traverse unit 4 is supported by a traverse unit support member 115. One end of the traverse unit support member 115 is rotatably supported by the apparatus main body 2 by a rotation shaft 116. The traverse unit 4 on the other end side of the traverse unit support member 115 is provided with a turntable 117.

  A pair of protruding shafts 118 and 119 (not shown in FIG. 17 and shown in FIG. 12C) are provided at the other left end of the traverse unit support member 115 in FIGS. 17A and 17B. As shown in FIG. 12C, these projecting shafts 118 and 119 are fitted in the cam holes 93 and 94, respectively. In this case, when the disk recording medium processing apparatus 1 shown in FIG. 17A is not in operation, the projecting shafts 118 and 119 are respectively connected to the lower horizontal holes 93a and 93a of the cam holes 93 and 94 as shown in FIG. It is located at the left end of 94a. In this state, as shown in FIG. 17A, the traverse unit 4 rotates counterclockwise, and the other end side is set to a lowered position that is lowered by a predetermined amount by a stopper (not shown) provided in the apparatus body 2.

Next, the operation of the disk recording medium processing apparatus 1 of this example configured as described above will be described.
When the disk recording medium processing apparatus 1 in which the disk 7 is not inserted is not operated, all the disks such as the first and second disk guide arms 11 and 12, the disk holding arm 44, the trigger lever 64, the slider reset 72, and the slider cam member 81 The constituent members of the recording medium processing apparatus 1 are in the inoperative positions shown in FIGS. 3 and 9, respectively. At this time, the disk holding arm 44 is in a state where the holding arm main body 45 and the holding auxiliary arm 47 are slightly bent as shown by a solid line in FIG. The shutter 8 sets the disc insertion / extraction opening 6 in the open state shown in FIG. Further, the traverse unit 4 is in the lowered position shown in FIG. Further, the main power supply of the disk recording medium processing apparatus 1 is turned on.

  In this non-operating state of the disk recording medium processing apparatus 1, the user first inserts a part of the small-diameter 8 cm disk 7 into the apparatus main body 2 through the disk insertion / extraction opening 6 from the right side in FIG. 3. Then, since the disk sensor 10 detects the disk 7, the drive motor 37 is rotationally driven by a control device (not shown) of the disk recording medium processing apparatus 1. The disk drive of the first disk guide arm 11 is carried out by the rotational drive of the drive motor 37 through the endless belt 41, the worm 38, the worm wheel 42, the intermediate gear 43, and the first to fourth gears 23, 24, 25, 26, 27. The roller 21 rotates counterclockwise in FIG. 3, that is, in a direction to draw the disk 7 toward the centering position.

  The outer peripheral edge of the disk 7 partially inserted into the disk insertion / extraction opening 6 comes into contact with the disk drive roller 21 and the disk guide part 33, and is sandwiched between the disk drive roller 21 and the disk guide part 33. Then, due to the rotation of the disk drive roller 21 and the friction with the disk guide part 33, the disk 7 rotates about the contact part with the disk guide part 33 as a fulcrum and rolls along the disk guide part 33 groove. It is drawn toward the position. At this time, since the urging force of the first disk guide arm 11 is set larger than the urging force of the second disk guide arm 12, the inserted small-diameter 8 cm disk 7 is the disk guide portion of the second disk guide arm 12. It is clamped in the biased state pressed against 33. Further, the outer peripheral edge of the disk 7 is sandwiched and held between the inclined surface 6b of the disk holding portion 6j on the second disk guide arm 12 side of the disk insertion / extraction opening 6 and the horizontal surface 6h by the urging of the disk 7. By holding the outer peripheral edge of the disk 7, the insertion posture of the disk 7 is maintained on the surface along the insertion direction, so that the disk 7 is inserted into the apparatus main body 2 from the disk insertion / removal port 6 in a stable posture.

  Further, since the distance between the disk drive roller 21 and the disk guide portion 33 is smaller than the diameter of the disk 7, the first and second disk guide arms 11 and 12 are opened by the disk 7 (the first disk guide arm 11 3 rotates clockwise in FIG. 3, and the second disk guide arm 12 rotates counterclockwise in FIG. At this time, the first and second disc guide arms 11 and 12 are synchronized with each other by the arm synchronization member 98 and rotated. Thus, the pair of arms 11 and 12 are pulled in a stable state with the disk 7 interposed therebetween.

  When the disk 7 is pulled in a predetermined amount, the outer peripheral edge of the disk 7 first comes into contact with one of the disk holding rollers 56 of the disk holding arm 44 and presses the disk holding roller 56 leftward in FIG. Then, the disk holding arm 44 rotates counterclockwise in FIG. When the disc holding arm 44 is rotated by a predetermined amount, the first pressing portion 52 of the disc holding arm 44 is rotated in the same direction to contact the pressed shaft 67 of the trigger lever 64 and press the pressed shaft 67. . Then, the trigger lever 64 rotates counterclockwise in FIG. 3, and the pressing shaft 68 presses the slider reset 72 to the right in FIG. 3, so that the slider reset 72 moves straight to the right. By the right movement of the slider reset 72, the first cam groove portion 77 b of the cam groove 77 a of the slider reset 72 moves linearly relative to the pin 84 of the slider cam member 81. Therefore, at this time, the pin 84 is not controlled to be pressed by the first cam groove 77b, and the slider cam member 81 is held in a stopped state at the non-operating position.

  When the slider reset 72 moves further to the right in FIG. 3, the rack gear 76 of the slider reset 72 meshes with the slider reset drive gear 80. At this time, since the slider reset drive gear 80 is rotated by the rotational drive of the drive motor 37, the slider reset 72 moves to the right by the rotational drive force of the drive motor 37. Further, when the rack gear 76 is engaged with the slider reset driving gear 80, the pin 84 is located at the boundary between the first cam groove 77b and the second cam groove 77c.

  When the slider reset 72 is moved rightward by the rotational driving force of the drive motor 37, the pin 84 of the slider cam member 81 is perpendicular to the moving direction of the slider reset 72 by the second cam groove 77c, that is, the longitudinal direction of the apparatus main body 2 in FIG. Therefore, the slider cam member 81 starts to move in the same direction.

  When the slider cam member 81 further moves upward, the rack gear 87 of the slider cam member 81 meshes with the slider cam member drive gear 97. At this time, since the slider cam member drive gear 97 is rotated by the rotational drive of the drive motor 37, the slider cam member 81 moves upward by the rotational drive of the drive motor 37. At this time, the pin 84 is positioned in the third cam groove 77c, the rack gear 76 of the slider reset 72 is disengaged from the slider reset driving gear 80, and the slider reset 72 is held at that position.

  As the slider cam member 81 moves upward, the auxiliary lever 105 is pressed upward in FIG. 3 via the stopper 81c, so that it starts to rotate clockwise. Further, when the slider cam member 81 moves upward, the stopper 81 b of the slider cam member 81 is brought into a position where it does not come into contact with the pin 19 of the first disk guide arm 11. Furthermore, the pin 32 becomes a position where it can enter the cam surface 90 by the counterclockwise rotation of the second disk guide arm 12. Further, when the second disk guide arm 12 is rotated by a predetermined amount clockwise, the switch actuator 31 pushes the operation element 108a of the first switch 108, and the first switch 108 is turned on.

  When the maximum diameter portion of the 8 cm disc 7 passes between the disc driving roller 21 and the disc guide portion 33, the first and second disc guide arms 11, 12 are reversely closed, that is, the first disc guide arm. 11 rotates counterclockwise and the second disk guide arm 12 rotates clockwise. The pin 32 enters the cam surface 90 by the clockwise rotation of the second disk guide arm 12 and the upward movement of the slider cam member 8.

  During this time, the outer peripheral edge of the disk 7 of the disk 7 is in contact with the drive roller 21 and the disk guide portion 33, and the first and second disk guide arms 11 and 12 sandwich the disk 7. At the time when the first and second disc guide arms 11 and 12 start to rotate in the closing direction, the second disc guide arm 12 does not rotate greatly counterclockwise. The operator 109a is not pressed, and the second switch 109 is not turned on. When the second disk guide arm 12 is rotated by a predetermined amount clockwise, the switch actuator 31 is separated from the operation element 108a of the first switch 108, so that the first switch 108 is turned off.

  Further, when the disk 7 enters the centering position, the outer peripheral surface of the disk 7 comes into contact with the pin 106 of the auxiliary lever 105, and the auxiliary lever 105 is rotated counterclockwise by the disk 7.

  When the 8 cm disk 7 approaches the centering position, the slider cam member 81 approaches the maximum movement limit position. Then, the cam surface 91 a of the slider cam member 81 contacts the arm 114 of the opening / closing control member 112, and the opening / closing control member 112 rotates in a direction in which the shutter 8 closes the disk insertion / extraction port 6. Further, the pair of projecting shafts 118 and 119 of the traverse unit support member 115 move from the lower horizontal holes 93a and 94a of the cam holes 93 and 94 to the inclined holes 93b and 94b, respectively. It rotates clockwise in FIG. As a result, the traverse unit 4 gradually turns upward and comes very close to the upward movement position shown in FIG.

  By further rotating the disk holding arm 44 counterclockwise, the holding auxiliary arm 47 rotates relative to the holding arm main body 45, so that the outer peripheral edge of the disk 7 is moved to the disk driving roller 21, the disk guide portion 33, and the like. While being held by the disk holding rollers 56 and 57, the 8 cm disk 7 is centered at the centering position. When the 8 cm disc 7 is in the centering position shown in FIG. 3, the pin 106 of the auxiliary lever 105 abuts on the outer peripheral surface of the disc 7 as shown in FIG. 18. Thus, when the 8 cm disc 7 is set to the centering position shown in FIG. 3, the disc 7 is sandwiched at four locations by the disc driving roller 21, the disc guide portion 33, and the two disc holding rollers 56 and 57. At the same time, the outer peripheral surface of the disk 7 is supported by the pins 106. Thereby, the 8-cm disk 7 is stably hold | maintained to the three-dimensional direction of XYZ. At this time, the side edge 105b of the auxiliary lever 105 is in contact with the stopper 81d of the slider cam member 81 and is stably held at the centering setting position.

  When the slider cam member 81 further moves, the pair of projecting shafts 118 and 119 of the traverse unit support member 115 move to the upper horizontal holes 93c and 94c of the cam holes 93 and 94, respectively, and the traverse unit support member 115 further turns the clock. The traverse unit 4 is turned to the upper position shown in FIG. 17B, and the 8 cm disc 7 is clamped between the clamper of the clamper support member 5 and the turntable 117. When the 8 cm disc 7 is clamped in this way, the switch operating portion 81e of the slider cam member 81 presses the operating element 110a of the third switch 110, so that the third switch 110 is turned on. Thereby, the control device stops the drive motor 37 and the slider cam member 81 also stops.

  Further, when the slider cam member 81 is moved from the center of the disk 7 to the clamp, the auxiliary lever 105 is rotated clockwise by the stopper 81c so that the pin 106 is separated from the outer peripheral surface of the disk 7 and the second disk guide. When the pin 32 of the arm 12 is controlled by the third cam surface 90 c of the slider cam member 81, the second disk guide arm 12 is slightly rotated counterclockwise in FIG. 18, and the disk guide portion 33 is outside the disk 7. Move away from the periphery. Further, when the second disk guide arm 12 is rotated counterclockwise, the first disk guide arm 11 is rotated clockwise via the synchronization member 98, and the disk drive roller 21 is separated from the outer peripheral edge of the disk 7. Further, since the pressing portion 82 of the slider cam member 81 contacts the pin 55a of the disk holding arm 44 and presses the pin 55a, the disk holding arm 44 slightly rotates counterclockwise in FIG. 18 to hold the two disks. Both rollers 56 and 57 are separated from the outer peripheral edge of the disk 7. Thus, the 8 cm disc 7 clamped on the turntable 117 of the traverse unit 4 is free to rotate, and recording or reproduction with respect to the 8 cm disc 7 becomes possible. Further, the shutter 8 closes the disk insertion / extraction opening 6 as shown in FIG.

  When the recording or reproduction with respect to the 8 cm disc 7 is completed and the disc 7 is taken out from the disc recording medium processing apparatus 1, an eject button (not shown) provided in the apparatus main body 2 is pressed. As a result, the control device drives the drive motor 37 to rotate in the direction opposite to that described above. Then, the disk drive roller 21 rotates in the direction in which the disk 7 is ejected, and the slider cam member 81 linearly moves downward in FIG. Then, the first and second disk guide arms 11 and 12 are rotated in the closing direction by the third cam surface 90 c of the slider cam member 81, and the disk drive roller 21 and the disk guide portion 33 come into contact with the outer peripheral edge of the disk 7. Then, the disc 7 is sandwiched. Further, since the pressing portion 82 of the slider cam member 81 is separated from the pin 55a of the disk holding arm 44, the urging force by the spring to the non-operating position acting on the disk holding arm 44 and the pressing portion 81g of the slider cam member 81 is the disk holding arm. The disc holding arm 44 is rotated clockwise in FIG. 18 by the pressing force that abuts against and presses the pin 55b of the disc 44, and the two disc holding rollers 56 and 57 are brought into contact with the outer peripheral edge of the disc 7. The disk 7 is held in contact. Further, since the stopper 81c of the slider cam member 81 is separated from the auxiliary lever 105, the urging force applied to the auxiliary lever 105 rotates counterclockwise in FIG. 18, and the pin 106 comes into contact with the outer peripheral surface of the disk 7. The disk 7 is supported. Thus, the 8-cm disk 7 is stably held.

  Subsequently, as the slider cam member 81 moves, the pair of projecting shafts 118 and 119 of the traverse unit support member 115 move to the inclined holes 93b and 94b of the cam holes 93 and 94, respectively, and the traverse unit support member 115 moves the rotating shaft 116. It rotates in the counterclockwise direction in FIG. As a result, the traverse unit 4 gradually rotates downward, and the disc 7 is released from the clamp (that is, the disc 7 is unclamped). Further, since the cam surface 91a is moved away by the movement of the slider cam member 81, the shutter 8 is rotated in a direction to open the disc insertion / extraction port 6 by the urging force applied.

  Further movement of the slider cam member 81 causes the first and second disk guide arms 11 and 12 to rotate in the opening direction, and the disk holding arm 44 further rotates in the clockwise direction. 21 and moves to the right in FIG. 18 while being held between the disk guide portion 33 and the disk holding rollers 56 and 57. At this time, since the disk drive roller 21 rotates in the opposite direction to that described above, the disk 7 is also moved to the right by the rotational drive force of the disk drive roller 21.

  When the slider cam member 81 moves further downward in FIG. 3, the pin 84 is positioned in the second cam groove 77c, and the pin 84 pushes the slider reset 72 upward in FIG. 11 via the second cam groove 77. To move. As a result, the rack gear 76 of the slider reset 72 meshes with the slider reset drive gear 80. At this time, the rack gear 87 of the slider cam member 81 is disengaged from the slider cam member drive gear 97. However, since the slider reset drive gear 80 rotates in the reverse direction to that described above due to the reverse rotation of the drive motor 3, the slider reset 72 moves to the left in FIG. 18 via the rack gear 76 meshing with the slider reset drive gear 80. As it moves, the trigger lever 64 rotates counterclockwise.

When the second disk guide arm 12 is further rotated in the opening direction (that is, counterclockwise), the switch actuator 31 turns on the first switch 108.
When the maximum diameter portion of the disk 7 passes between the disk drive roller 21 and the disk guide portion 33, the second disk guide arm 12 rotates in the closing direction (that is, counterclockwise). When the second disk guide arm 12 is rotated by a predetermined amount in the closing direction, the switch actuator 31 is separated from the first switch 108 and the first switch 108 is turned off. The control device stops the drive motor 37 when the first switch 108 is turned on or off. This stops the movement of the disk 7 to the right (that is, the ejecting direction). At this time, a part of the disk 7, that is, more than half of the center part 7a (shown in FIG. 18) of the disk 7 is inserted and removed. It goes out from the exit 6. In that case, the non-recording portion 7b (shown in FIG. 18) at the outer peripheral end of the disc 7 is held by the linear holding groove of the linear guide holding portion 35, so that the disc 7 is stably held. . Moreover, as in the case of the insertion of the disk 7 described above, the outer peripheral edge of the disk 7 is the second disk guide arm 12 of the disk insertion / extraction port 6 due to the difference in urging force between the first and second disk guide arms 11 and 12. The disc holding portion 6j on the side is sandwiched and held between the inclined surface 6b and the horizontal surface 6h. By holding the outer peripheral edge of the disk 7, the discharge posture of the disk 7 is maintained on the surface along the discharge direction, so that the disk 7 partially discharged from the disk insertion / extraction opening 6 is held in a more stable posture. The Then, in this state of the disc 7, the user grasps the center portion 7 a which is a non-recording portion of the disc 7 which is a non-recording portion by hand and pulls out the disc 7 from the apparatus body 2. In this way, the 8 cm disk 7 is taken out from the disk recording medium processing apparatus 1.

  When the 8 cm disk 7 is removed, all the disk recording medium processing devices such as the shutter 8, the first and second disk guide arms 11, 12, the disk holding arm 44, the trigger lever 64, the slider reset 72, and the slider cam member 81, etc. The constituent members 1 are set to the non-operating positions shown in FIGS. 3 and 9 by the urging force acting on them.

  Next, insertion and extraction of the large-diameter 12 cm disk 7 from the apparatus main body 2 will be described. Since the most part is the same as the case of insertion and removal of the 8 cm disc 7, only the parts different from the case of insertion and removal of the 8 cm disc 7 will be described.

  When the 12 cm disc 7 is inserted into the apparatus main body 2 from the right side through the disc insertion / extraction opening 6 in FIG. 3, the drive motor 37 is driven to rotate and the disc drive roller 21 is rotated, so that the 12 cm disc 7 is drawn. It is. As a result, the first and second disc guide arms 11 and 12 rotate in the opening direction. However, since the diameter of the 12 cm disc 7 is larger than the diameter of the 8 cm disc 7, the first and second disc guide arms 11 and 12 Compared with the case of the 8-cm disk 7, it rotates largely in the opening direction. Then, the cam surface 16a of the cam 16 of the first disc guide arm 11 contacts the cam contact portion 69 of the trigger lever 64, and pushes the trigger lever 64 upward in FIG. 9 against the spring force of the coil spring 71. As a result, the pressed shaft 67 is also raised, so that the pressed shaft 67 is set to a position where the first pressing portion 52 of the disk holding arm 44 does not contact and can contact the second pressing portion 53. Therefore, in the case of the 12 cm disc 7, the disc holding arm 44 rotates more than in the case of the 8 cm disc 7, the second pressing portion 53 comes into contact with the pressed shaft 67, and the trigger lever 64 rotates. Start moving. That is, in the case of the 12 cm disk 7, a trigger is set for the slider cam member 81 to start operation (start movement) after the disk holding arm 44 rotates greatly. In this way, by changing the amount of rotation of the disk holding arm 44 that starts the operation of the slider cam member 81, the centering control after the start of the operation of the slider cam member 81 is different from the case of the 8 cm disk 7 even in the case of the 12 cm disk 7. The same constant can be achieved.

  Further, when the second disc guide arm 12 is largely rotated in the opening direction, the switch actuator 31 of the second disc guide arm 12 turns on the first switch 108 and the second switch 109 also turns on. The rotation control of the first and second disc guide arms 11 and 12 is performed by controlling the pin 32 of the second disc guide arm 12 by the two cam surfaces 88a and 88b, unlike the case of the 8 cm disc 7. Is called.

  Further, in FIG. 3, the outer peripheral edge of the 12 cm disk 7 inserted into the disk recording medium processing apparatus 1 abuts on the disk holding roller 56 of the disk holding arm 44 to hold the disk in the same manner as in the case of the 8 cm disk 7. The arm 44 is rotated counterclockwise. When the amount of rotation of the disk holding arm 44 is increased, the disk holding roller 57 is brought into contact with the outer peripheral edge of the 12 cm disk 7 as in the case of the 8 cm disk described above, and the outer peripheral edge of the disk 7 is the disk drive roller 21 and disk guide. The 12 cm disc 7 is held by being sandwiched between the portion 33 and the disc holding rollers 56 and 57. Then, as shown in FIG. 19, the holding auxiliary arm 47 rotates relative to the holding arm main body 45 by further counterclockwise rotation of the disk holding arm 44, so that the outer peripheral edge of the disk 7 becomes a disk driving roller. 21, the 12 cm disc 7 is centered at the centering position while being held between the disc guide portion 33 and the disc holding rollers 56 and 57.

As in the case of the above-mentioned 8 cm, when the disk holding arm 44 is further rotated counterclockwise by further movement of the slider cam member 81 from the centering of the 12 cm disk 7 until it is clamped, as shown in FIG. the pressed part 61a of the switching control lever 61 comes into contact with the side wall of the apparatus body 2, the switching control lever 61 is made to rotate counterclockwise, holding the auxiliary arm 47 is relatively rotated with respect to the holding arm body 45 It will be in the state shown with a dashed-two dotted line in FIG.7 (b). Thereby, even if the disk holding arm 44 is largely rotated, the rotation space of the disk holding arm 44 becomes compact. When the 12 cm disc 7 is clamped on the turntable 117 of the traverse unit 4, as shown in FIG. 20, the disc drive roller 21, the disc guide portion 33, the disc, as in the case of the 8 cm disc 7 described above. The holding rollers 56 and 57 and the pin 106 are separated from the 12 cm disk 7, and the 12 cm disk 7 is freely rotatable.

  The auxiliary lever 105 is not necessarily provided, and the 8 cm disk 7 can be stably clamped at the four outer peripheral edges by the disk driving roller 21, the disk guide 33, and the two disk holding rollers 56 and 57. If possible, it can be omitted.

  According to the disk recording medium processing apparatus 1 of this example configured as above, the outer peripheral edge of the disk 7 is sandwiched between the pair of first and second disk guide arms 11 and 12, and the disk insertion / extraction port 6 and the traverse Since the disk 7 is transported to and from the turntable 117 of the unit 4, the transport structure of the disk 7 can be simplified while protecting the recording surface of the disk 7 from damage and adhesion of foreign matters such as dust. It can be formed compactly.

  In addition, the first disk guide arm 11 is provided with a disk drive roller 21 for transporting the disk 7, and a power transmission gear train 22 for rotating the disk drive roller 21 is arranged on the first disk guide arm 11. Therefore, even if the first disk guide arm 11 is rotated, the rotational driving force of the drive motor 37 can be reliably transmitted to the disk drive roller 21, and the first disk guide arm 11 is effectively used. By doing so, it is not necessary to provide a space for arranging the gear train 22 in the apparatus main body 2. Thereby, an apparatus can be formed still more compactly.

  Further, the first disk guide arm 11 is provided with a disk drive roller 21 that holds the outer peripheral edge of the disk 7, and the second disk guide arm 12 is provided with a disk guide portion 33 made of an elastic friction material that holds the outer peripheral edge of the disk 7. Since it is provided, it is not necessary to provide a roller on the second disk guide arm 12. As a result, the disc clamping structure on the second disc guide arm 12 side can be simplified. Moreover, since the linear holding surfaces 35a and 35b are provided on the disc guide portion 33, the disc 7 can be stably held when the disc 7 is taken out, and the disc 7 can be taken out easily.

  Further, since the rotation of the first and second disk guide arms 11 and 12 is synchronized by the arm synchronization member 98, the disk 7 is transported from the disk insertion / extraction port 6 to the centering position of the trailer bus unit 4 and the trailer bus. The transport of the disk 7 from the centering position of the unit 4 to the disk insertion / extraction opening 6 can be performed more accurately and easily without biasing the disk 7 in the apparatus main body 2.

  Further, since the first disc guide arm 11 is provided with a cam 16 for discriminating the diameter of the disc 7 and controlling the conveyance of the disc 7 according to the diameter, other cams for discriminating the diameter of the disc 7 are provided. There is no need to direct the means separately, the number of parts can be reduced, and the installation space for the apparatus main body 2 can be eliminated, and the apparatus can be made more compact.

  Further, since the disk holding arm 44 is structured to be able to be bent from the holding arm main body 45 and the holding auxiliary arm 47, each disk 7 having a large and small diameter of 12 cm or 8 cm can be securely clamped by one disk holding arm 44. In addition, the radius of rotation of the disk holding arm 44 can be suppressed, and the apparatus can be made more compact. In addition, since the holding auxiliary arm 47 can hold the small-diameter 8-cm disk 7 in at least two places, even a small-diameter disk can be securely held. Further, the centering of each of the large and small diameter 12 cm and 8 cm disks 7 by the disk holding arm 44 can be performed more reliably and easily.

  Furthermore, since a trigger for starting the conveyance of each of the large and small diameter 12 cm and 8 cm disks 7 is set according to the amount of rotation of the disk holding arm 44, the disk 7 can be easily and flexibly adapted to different diameters. Thus, the conveyance control of the disk 7 can be performed constantly and more easily.

  Further, one control member of the slider cam member 81 is used to control the conveyance of the disk 7, the centering control of the disk 7, the clamp control and the unclamp control of the disk 7 with respect to the turntable 117, and the opening and closing of the shutter 8 regardless of the diameter of the disk 7. Since control and a plurality of controls such as ON / OFF control of the third switch 110 are performed, a control member for performing these controls individually can be eliminated, the number of parts can be reduced, and Control can be facilitated and controllability can be improved, and the installation space for these individual control members in the apparatus main body 2 can be eliminated, so that the apparatus can be made more compact.

  Furthermore, since the traverse unit 4 is supported by the traverse unit support member 115 and the traverse unit support member 115 is simply rotated, the disc 7 can be clamped to the traverse unit 4. Even if the apparatus 1 is used, it is not necessary to change the design of the traverse unit 4, and the conventional traverse unit 4 can be used as it is. Thereby, the disk recording medium processing apparatus 1 can be manufactured easily and inexpensively.

  Further, since the disk 7 is sandwiched by at least the disk drive roller 21, the disk guide portion 33, and the disk holding roller 56, the installation posture of the disk recording medium processing apparatus 1 can be freely set in any of horizontal, vertical, and inclined directions. Can be set.

In the example shown in FIG. 4A, the pair of clamping surfaces 21c and 21d of the disc clamping portion 21b are both curved surfaces that are continuous in the circumferential direction. However, as shown in FIG. The pair of sandwiching surfaces 21c and 21d of the part 21b can be intermittently conical curved surfaces by alternately repeating the convex surfaces 21c ₁ and 21d ₁ and the concave surfaces 21c ₂ and 21d ₂ in the circumferential direction. In this case, in the example shown in FIG. 21, the convex surfaces 21c ₁ and 21d ₁ are continuous in the axial direction via the bottom surface 21e of the boundary portion between the clamping surfaces 21c and 21d, and the concave surfaces 21c ₂ and 21d ₂ are also connected via the bottom surface 21e. It is provided continuously in the axial direction.

  The disk recording medium processing apparatus of the present invention is used in, for example, audio equipment, video equipment, information equipment, communication equipment, measuring equipment, etc., and is a disc recording that performs processing such as recording and reproduction on a disc such as a CD or DVD. It can be suitably used for a medium processing apparatus.

1 schematically shows an example of an embodiment of a disk recording medium processing (recording / reproducing) apparatus according to the present invention, where (a) is a perspective view thereof, (b) is a diagram showing a disk insertion / extraction port, and (c) is a disk. It is a figure which shows the modification of an insertion outlet. 2 shows a disk insertion / extraction part of the disk recording medium processing apparatus of this example, (a) is a perspective view showing a state where the disk insertion / extraction opening is opened, and (b) is a state where the disk insertion / extraction opening is closed. It is a perspective view shown. FIG. 3 is a plan view (top view) partially showing the disk recording medium processing apparatus in a non-operating state with the upper plate of the apparatus main body removed. (A) is a perspective view seen from obliquely above, (b) is a perspective view seen from the IVB direction in (a), and (c) is a perspective view seen from the IVC direction in (a). It is. FIG. 7A is a perspective view of the second disk guide arm as viewed from obliquely above, and FIG. It is a top view (top view) which shows drive parts, such as a drive motor, of the disk recording medium processing apparatus of this example. The disk holding arm is shown, (a) is a perspective view, (b) is an operation explanatory view. It is a perspective view which shows a trigger lever. It is a perspective view which shows the installation part of a trigger lever partially. It is a perspective view which shows a slider reset. It is a bottom view which shows the installation part of a slider reset partially. The slider cam member is shown, (a) is a perspective view seen from the disk insertion / extraction side, (b) is a perspective view seen from the XIIB direction in (a), and (c) is a perspective view seen from the XIIC direction in (b). FIG. It is a figure explaining the relationship between a slider cam member and a slider cam member drive gear. It is a partial bottom view explaining the synchronization of the first disk guide arm and the second disk guide arm. It is a fragmentary top view which shows three switches. It is a fragmentary perspective view which shows the opening / closing mechanism of a shutter partially. The traverse unit is shown, (a) is a diagram showing a state in the down movement position, (b) is a diagram showing a state in the up movement position. It is a top view which shows the state which centered the disk of small diameter 8cm. It is a top view which shows the state which centered the disk of large diameter 12cm. It is a top view which shows the state which released | pinched the centering large diameter 12cm disc. It is a figure which shows the modification of a disk drive roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Disc recording medium processing apparatus, 2 ... Apparatus main body, 3 ... Disc loading / unloading part, 4 ... Traverse unit, 5 ... Clamper support part, 6 ... Disc insertion / extraction port, 6h ... Horizontal surface, 6j ... Disc holding part, 7 ... Disc, 8 ... Shutter, 10 ... Disc sensor, 11 ... First disc guide arm, 12 ... Second disc guide arm, 16 ... Cam, 16a ... Cam surface, 21 ... Disc drive roller, 22 ... Gear train, 23 ... First DESCRIPTION OF SYMBOLS 1 gear, 24 ... 2nd gear, 25 ... 3rd gear, 26 ... 4th gear, 27 ... 5th gear, 30 ... Gear, 31 ... Switch actuator, 33 ... Disc guide part, 37 ... Drive motor, 44 ... Disc holding arm, 45 ... holding arm body, 47 ... holding auxiliary arm, 52 ... first pressing portion, 53 ... second pressing portion, 56, 57 ... disc holding roller, 64 ... trigger lever 67 ... Pressed shaft, 68 ... Pressing shaft, 69 ... Cam contact portion, 72 ... Slider reset, 75 ... Pressed portion, 76 ... Rack gear, 77 ... Cam, 77a ... Cam groove, 77b ... First cam groove portion, 77c ... second cam groove portion, 77d ... third cam groove portion, 80 ... slider reset drive gear, 81 ... slider cam member, 81e ... switch operating portion, 87 ... rack gear, 88 ... cam surface, 89 ... cam, 90 ... cam surface, 93, 94 ... Cam hole, 97 ... Slider cam member drive gear, 98 ... Arm synchronization member, 99, 100 ... Rack gear, 108 ... First switch, 109 ... Second switch, 110 ... Third switch, 115 ... Traverse unit support member 117 ... Turntable

Claims (3)

A device body having a disc insertion outlet is disposed in said apparatus main body, a recording for any diameter disk 8cm and diameter 12cm, clamping the disk on at least one traverse unit for erasing and playback And a clamper supporting means for the clamper, and a disk having a diameter of 8 cm or a diameter of 12 cm partially inserted into the disk insertion / extraction port, and the disk in the apparatus body. In a disk recording medium processing apparatus comprising at least a disk conveying unit that discharges a part from the disk insertion / extraction port and a control unit that controls the disk conveying unit,
The disk transport means includes at least three first to third disk transport arms that are rotatably provided in the apparatus main body and convey the outer peripheral edge of the disk in the apparatus main body. ,
The first and second disk transport arms draw the disk partially inserted into the disk insertion / extraction port into the apparatus main body, and part of the disk in the apparatus main body is inserted into the disk insertion / extraction. It is an arm that discharges from the outlet to the outside,
Centering that clamps the disk pulled into the apparatus main body by the first and second disk transport arms together with the first and second disk transport arms to the traverse unit by the third disk transport arm. An arm that transports the disc at the centering position to the disc insertion / extraction port together with the first and second disc transport arms,
Before Symbol third disc transport arm has a two first and second arm members which are foldable connected to each other, together with the first arm member is rotatably supported by the apparatus main body The second arm member is connected to the first arm member so as to be rotatable together with the first arm member so as to be relatively rotatable.
Before Stories second arm member is to support the circumferential edge of the disk is drawn into the apparatus main body by the disk insertion preparative inserted from the outlet and the first and second disk transfer arm in the first one place, the by relative rotation with respect to the first a over arm member in response to movement of the insertion direction of the disk, characterized in that at least the disc is set so as to sandwich at two positions when centered Disc recording medium processing device. The amount of rotation of the first arm member is set according to the size of the diameter of the disk,
2. The disk recording medium processing apparatus according to claim 1 , wherein the two positions where the second arm member sandwiches the outer peripheral edge of the disk are set according to the rotation amount of the first arm member. After the disc is clamped by the clamper, when the first arm member is rotated and the second arm member is separated from the outer peripheral edge of the disc, the third disc is conveyed with respect to the first arm member. 3. The disk recording medium processing device according to claim 1, wherein the disk recording medium processing device is set so as to rotate relative to a direction opposite to a rotation direction of the arm .

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