Disk-loading device

The present invention relates to a disk loading device, and more particularly to a disk loading device in which a disk is inserted into a disk loading device housing in a horizontal position and loaded onto a turntable. ..

Conventionally, when an operator inserts a bare disc taken out of a case into a disc insertion slot on the front panel of an apparatus, the disc is automatically pulled in and is placed on a turntable. There is a disc loading device configured to be loaded and played back in a disk, and after the playback is completed, the disc is ejected until it protrudes out of the disc insertion slot.

[0003] This disc loading device is provided with a long upper roller across the disc above the disc passage and a long lower roller across the disc below the disc passage, and is horizontally halfway. The inserted disc is sandwiched between a pair of upper and lower rollers, and the rollers rotate to pull the disc into the device.

PROBLEM TO BE SOLVED: To solve a problem. Since a conventional disk loading device has a configuration in which long rollers crossing a disk are provided on the upper side and the lower side of a passage of the disk, the thickness becomes thicker and thinner. It was difficult to plan.

[0004] Further, one of the rollers comes into contact with the recording surface of the disc, which may damage the recording surface.

[0005] Further, since the movement of the disc utilizes the friction between the roller and the disc, there is a risk that the movement of the disc becomes unstable when the roller is worn.

[0006] Therefore, an object of the present invention is to provide a disk loading device that solves the above problems.

[Means for Solving the Problems] In order to solve the above problems, the invention of claim 1 is that a disc is inserted and loaded onto a turntable, and then the disc is ejected to the outside for unloading. In the disk loading device, the motor and a locking portion that locks the peripheral edge of the disk on the insertion direction side of the peripheral edge of the disk are provided so as to be rotatable in a plane parallel to the moving surface of the disc. It has a first arm and a locking portion that locks the peripheral edge of the disk whose tip is halfway inserted, which is opposite to the disk insertion direction side, and is in the plane parallel to the moving surface of the disk. In the process of loading the disc, the second arm is rotatably provided by the above, and when the disc is manually inserted halfway, the motor causes the second arm to be locked by the locking portion of the disc. In the process of locking and pushing the peripheral edge to rotate the disc so as to push it into the disc loading device and unloading the disc, the motor causes the above.<u style="single">First a</u>The locking part locks and pushes the periphery of the disk to push the disk out of the disk loading device.<u style="single">Push to</u>A control mechanism that controls the rotation so that it starts out,<u style="single">It has a disc support guide mechanism that supports and guides the disc in the process of being loaded and separates it from the disc during disc playback.</u><u style="single"> The disk support guide mechanism is</u><u style="single"> It has a U-shape consisting of an upper plate, a lower plate, and a side plate, and has a rack, and is supported on both sides of the disc to be inserted so as to be movable in a direction orthogonal to the insertion direction of the disc. It consists of a pinion in which the disc support guide members on both sides are engaged with the racks in opposite positions of the disc support guide members on both sides, and the disc support guide members on both sides interlock and move the same distance in opposite directions on both sides. The peripheral edge of the disc in the process of being loaded between the side plates of the disc support guide member is supported and guided, and during disc playback, the disc support guide members on both sides are interlocked and moved in a direction away from each other, and the disc support guide members on both sides are moved. The side plate of the disc is separated from the periphery of the disc.</u>It was.

[Embodiment of the Invention] FIG. 1 shows a perspective view of the inside of a disk loading device 10 according to an embodiment of the present invention, and FIG. 2 shows an exploded view of the disk loading device 10 of FIG. FIG. 3 is a plan view showing a mechanism attached to the base member, and FIG. 4 is a plan view showing a mechanism attached to the lower surface of the cover member. 5 is a front view showing the inside of the disk loading device 10 of FIG. 1 as seen through, FIG. 6 is a side view, and FIG. 7 is a rear view. 5, FIG. 6, FIG. 7 and FIGS. 8 (A), (B) and 9 (A), (B) show the height exaggerated. In addition, each figure shows a state before inserting the disc 11.

[0010] In each figure, X1 and X2 are in the width direction of the disk loading device 10, Y1 and Y2 are in the depth direction of the disk loading device 10, and Z1 and Z2 are in the height (thickness) direction of the disk loading device 10. CL is a center line extending in the Y direction from the center of the disk loading device 10 in the X1 and X2 directions.

[0011] For convenience of explanation, first, a schematic operation of the disk loading device 10 will be described. 8 (A) and 9 (A) show the state during the disk loading, and FIGS. 8 (B) and 9 (B) show the state where the disk loading is completed.

[0012] The disk loading device 10 performs an operation of inserting the bare disk 11 taken out from the case into the disk insertion slot 13 of the front bezel 12 in a horizontal posture with the recording surface 11a facing downward. As a result, the states shown in FIGS. 8 (A) and 9 (A) are obtained, and subsequently, the operation is roughly as follows.

[0013] -The second arm (pushing arm) 83 pushes the disc 11.

[0014] -The disc guide-The disc 11 to which the support members 90 and 91 are pushed is guided and horizontally supported.

[0015] -The turntable 14 rises, and the turntable 14 supports the disc 11.

[0016] -The clamper 15 is released, the disc 11 is clamped, and the disc 11 is loaded onto the turntable 14 in the state shown in FIGS. 8 (B) and 9 (B). -The turntable motor 16 is started, the disc 11 is rotated, and the optical pickup 17 reproduces the disc 11.

[0017] When the operator performs the eject operation, the disk loading device 10 operates as follows.

[0018] -The clamper 15 is moved upward, and the clamp of the disc 11 is released.

[0019] -The turntable 14 is lowered, and the turntable 14 comes out of the central hole 11b of the disc 11.

-The disc guide-support members 90, 91 horizontally support the disc 11.

[0021] -The first arm (extrusion arm) 80 extrudes the disc 11 until it protrudes out of the disc insertion slot 13.

[0022] -The hook member 140 hooks the central hole 11b of the disc 11 and supports it so as not to fall. The disk loading device 10 is in the state shown in FIGS. 8 (A) and 9 (A).

Next, the structure of the disk loading device 10 will be described.

[0024] The disc loading device 10 has a motor 21, a reduction gear mechanism 22, a plate mechanism 23, a disc pushing / pushing mechanism 24, a disc support / guide mechanism 25, a turntable / optical pickup unit 26, and the like, inside the housing 20. The turntable / optical pickup unit elevating mechanism 27, clamp mechanism 28, clamp release mechanism 29, disc hook support mechanism 30, etc. are incorporated.

[0025] Hereinafter, each of the above mechanisms will be described.

[Case 20] As shown in FIGS. 1 and 2, the housing 20 has a structure including a base member 40, a cover member 41, and a front bezel 12. The base member 40 has a bottom plate portion 40a and a back plate portion 40b. The base member 40 is formed with guide grooves 40a1, 40b1, and 40b2 for guiding the turntable / optical pickup unit 26 so as to move in the Z1 and Z2 directions. The guide groove 40a1 is formed in the cut-up piece 40a2 of the bottom plate portion 40a, and the guide grooves 40b1 and 40b2 are formed in the back plate portion 40b. The cover member 41 has a top plate portion 41a and left and right side plate portions 41b and 41c. The top plate portion 41a is formed by cutting and raising the receiving portions 41a1 and 41a2, and the flanged pins 41a3 and 41a4 are crimped. These are for supporting the disc guide / supporting member. Further, the top plate portion 41a is formed by cutting and raising a receiving portion 41a5 for supporting the clamp release arm.

As shown in FIG. 3, on the base member 40, a motor 21, a reduction gear mechanism 22, a plate mechanism 23, a disc pushing / pushing mechanism 24, a disc supporting / guide mechanism 25, a turntable / optical pickup unit 26. , Turntable / optical pickup unit elevating mechanism 27 is attached.

As shown in FIG. 4, a disc support / guide mechanism 25, a clamper 28, a clamp release mechanism 29, and a disc hook support mechanism 30 are attached to the cover member 41.

[Motor 21, reduction gear mechanism 22] As shown in FIGS. 2, 3 and 10, the motor 21 is fixed to the upper surface of the bottom plate portion 40a. The gear mechanism 22 is provided on the upper surface of the bottom plate portion 40a, and has a configuration in which the worm gear 51, the reduction spur gear train 52, and the planetary gear mechanism 53 are arranged in the order of rotation transmission.

The planetary gear mechanism 53 is rotatably supported by a gear 55 fixed to the shaft 54, a sun gear 56 rotatably supported by the shaft 54, and a pin 57 crimped to the gear 55. It has a planetary gear 58 and a gear 59 rotatably supported on the upper end side of the shaft 54. The planetary gear 58 meshes with the sun gear 56. The gear 59 integrally includes an external gear 59a and an internal gear 59b. The internal gear 59b meshes with the planetary gear 58. The gear 55 functions as an arm of the planetary gear mechanism 53. The lower end of the shaft 54 is rotatably fitted into the hole in the bottom plate 40a. The external gear 59a meshes with the spur gear train 52a of the reduction spur gear train 52.

The gear 55 meshes with the rack portion 70b of the first slide plate 70, which will be described later. The sun gear 56 meshes with the rack portion 71b of the loading plate 71, which will be described later. The planetary gear mechanism 53 is in a state in which the sun gear 56 is constrained to rotate, or a state in which the gear 55 is constrained to rotate.

The rotation of the motor 21 is decelerated through the worm gear 51 the reduction spur gear train 52, and the decelerated rotation is transmitted to the gear 59 of the planetary gear mechanism 53. The rotation of the gear 59 is transmitted in the order of the internal gear 59b the planetary gear 58 the sun gear 56. In the state where the rotation of the sun gear 56 is restricted, the planetary gear 58 orbits the sun gear 56 to rotate the gear 55. The planetary gear mechanism 53 operates as a planetary gear mechanism. In the state where the rotation of the gear 55 is restricted, the position of the planetary gear 58 is stopped, the rotation of the gear 59 is transmitted as the internal gear 59b the planetary gear 58 the sun gear 56, and the sun gear 56 is rotated.

As shown in FIG. 3, a cam 60 is formed in the reduction spur gear train 52, and the lever 61 is swung by the cam, and the switch SW1 is driven by the swing of the lever 61. There is. When it is detected that the switch SW1 has been turned on and off a predetermined number of times, the motor 21 is stopped.

[Plate Mechanism 23] As shown in FIGS. 2, 3 and 11, the plate mechanism 23 is a first slide that slides in the X direction and is arranged so as to intersect the upper surface of the bottom plate portion 40a. It consists of a plate 70 and a loading plate 71 that slides in the Y direction.

[0035] The first slide plate 70 is provided with two elongated holes 70a so as to be slidable in the X1-X2 direction guided by the pin 72. The first slide plate 70 has rack portions 70b and 70c, has pins 70d crimped, and has a vertical plate portion 70e that is bent upward. An oblique slit 70f is formed in the vertical plate portion 70e. The rack portion 70b meshes with the gear 55 of the planetary gear mechanism 53 described above. The rack portion 70c, the vertical plate portion 70e, and the diagonal slit 70f form a part of the turntable / optical pickup unit elevating mechanism 27.

[0036] The loading plate 71 is provided with three elongated holes 71a so as to be slidable in the Y1-Y2 directions guided by the pin 73. The loading plate 71 has a rack 71b, a crank-shaped slit 71c, a substantially L-shaped slit 71d, a lug portion 71e, and a pin 71f. The rack portion 71b meshes with the sun gear 56 of the planetary gear mechanism 53 described above.

[0037] The crank-shaped slit 71c is engaged with the pin 70d of the first slide plate 70 described above. The crank-shaped slit 71c is composed of a Y-direction slit portion 71c1 extending in the Y direction, an X-direction slit portion 71c2 extending in the X direction, and a Y-direction slit portion 71c3 extending in the Y direction. .. The Y-direction slit portion 71c1 and the X-direction slit portion 71c2 and the Y-direction slit portion 71c3 are continuous. The slit 71c and the pin 70d restrain or enable the first slide plate 70 to slide in the X direction and the loading plate 71 to slide in the Y direction.

[0038] The substantially L-shaped slit 71d includes a slit portion 71d1 extending in the direction between X1 and Y2, and a Y-direction slit portion 71d2 connected thereto and extending in the Y direction.

[0039] The substantially L-shaped slit 71d and the lug portion 71e are engaged with the disc pushing / pushing mechanism 24. Pin 71f engages with the disc guide / support mechanism 25.

[0040] Before inserting the disc 11, as shown in FIG. 3, the first slide plate 70 is located in the X2 direction, and the loading plate 71 is located in the Y2 direction.

[Disc Pushing / Pushing Mechanism 24] As shown in FIGS. 1, 2 and 3, the disc pushing / pushing mechanism 24 is the upper surface of the bottom plate portion 40a and is located on the X2 direction side of the housing 20. It is provided. As shown in FIG. 12, the disc pushing / pushing mechanism 24 includes a first arm 80, a torsion coil spring 81, an oil damper 82, a second arm 83, and a switch SW2. In the first arm 80 and the second arm 83, the shaft portion of the first arm 80 and the shaft portion of the second arm 83 are close to each other, and the shaft portion of the first arm 80 is on the Y1 side and the second arm 80 is second. The shaft of the arm 83 is arranged on the Y2 side.

The first arm 80 has a gear portion 80a and a cam 80b at the base, a pin 80c at the upper surface of the tip, and is rotatably supported by a shaft 84 whose base is crimped to the bottom plate portion 40a. It is urged to rotate clockwise by the torsion coil spring 81. The first arm 80 is provided so that when the disc 11 is manually inserted, the peripheral edge 11c on the insertion direction side of the disc 11 comes into contact with the pin 80c. The cam 80b activates the switch SW2 when the first arm 80 is rotated counterclockwise. The gear portion 80a meshes with the gear 82a of the oil damper 82 fixed to the bottom plate portion 40a.

[0043] The end portion 80b1 of the cam 80b is in contact with the lug portion 71e of the loading plate 71, and the rotation position of the first arm 80 is determined by the position of the loading plate 71.

[0044] The second arm 83 has a convex portion 83a protruding upward at the tip, a pin-shaped convex portion 83b on the lower surface at an intermediate position, and a shaft 85 whose base is crimped to the bottom plate portion 40a. It is rotatably supported and is located above the loading plate 71. The convex portion 83a is at a height facing the peripheral edge 11c of the inserted disc 11. The pin-shaped convex portion 83b is fitted into a substantially L-shaped slit 71d of the loading plate 71, and the second arm 83 is rotated according to the sliding of the loading plate 71, and the second arm 83 of the second arm 83 The rotation position is determined by the position of the loading plate 71. That is, the position of the loading plate 71 determines the rotation positions of both the first arm 80 and the second arm 81.

[0045] Before inserting the disc 11, as shown in FIG. 3, the first arm 80 faces substantially the X1 direction, and the second arm 83 faces the Y2 direction. The protrusion 83a is in a position that does not interfere with the insertion of the disc 11, and the pin 80c protrudes into the passage of the disc 11 to be inserted.

[0046] Further, both the first arm 80 and the second arm 83 rotate in the XY plane. That is, the disc 11 rotates in a plane parallel to the moving plane during loading and unloading. Therefore, the disk loading device 10 is thin. [Disk Support / Guide Mechanism 25] As shown in FIGS. 1, 2, 4, 5, 6 and 13, the disk support / guide mechanism 25 includes the disk support / guide member 90 on the X1 side and X2. It has a disc support / guide member 91 on the side and a pinion 92.

The X1 side disc support / guide member 90 includes a side plate portion 90a on the X1 side for guiding the disc 11, an upper plate portion 90b formed with a slit 90b1, and a lower plate portion 90b for supporting the disc 11. It has a U-shape consisting of a side plate 90c, and has an arm 90d protruding in the X2 direction from the upper plate 90b and a lug 90e protruding in the Y1 direction from the upper plate 90b. A rack 90f is formed on the arm 90d.

[0048] The X2 side disc support / guide member 91 is provided with a side plate portion 91a on the X2 side for guiding the disc 11, an upper plate portion 91b on which the slit 91a1 is formed, and a lower plate portion 91b for supporting the disc 11. It has a U-shape including a side plate portion 91c, and has an arm portion 91d protruding in the X1 direction from the upper plate portion 91b and a lug portion 91e protruding in the Y1 direction from the upper plate portion 91b. A rack 91f is formed on the arm 91d. A substantially L-shaped slit 90g is formed in the lower plate portion 91c. The slit 90g includes a slit portion 90g1 extending in the X1 direction, a slit portion 90g2 extending in the Y1 direction, and a slit portion 90g3 extending in a direction intermediate between X1 and Y1.

[0049] In the disc support / guide member 90, the slit 90b1 is supported by the flanged pin 41a4, the lug portion 90e is supported by the receiving portion 41a2, and the slit 90b1 is supported on the lower surface of the top plate portion 41a so as to be movable in the X direction. There is. Similarly, in the disc support / guide member 91, the slit 91b1 is supported by the flanged pin 41a3, the lug portion 91e is supported by the receiving portion 41a1, and the slit 91b1 is supported on the lower surface of the top plate portion 41a so as to be movable in the X direction. ..

[0050] The lower plate portions 90c and 91c of the left and right disc support / guide members 90 and 91 have disc support surfaces 90c1 and 91c1 that support the disc on the upper side. As shown in FIG. 5, the disc support surfaces 90c1 and 91c1 are inclined planes that have the lowest center line CL side and are displaced upward as they approach the side plate portions 90a and 91a. The inclination angles of the disk support surfaces 90c1 and 91c1 are α. The disc support surfaces 90c1 and 91c1 are inclined so as not to damage the recording surface 11a of the support disc 11.

[0051] Further, the rack 90f and the rack 91f are in a positional relationship facing each other, and mesh with a pinion 92 attached to the lower surface of the top plate portion 41a by a cross-shaped member 93. Therefore, the disc support / guide member 90 moves in the direction opposite to the direction of movement of the disc support / guide member 91 in conjunction with the movement of the disc support / guide member 91. Therefore, the disc support / guide members 90 and 91 move in the same distance in opposite directions in conjunction with each other, and always maintain a symmetrical relationship with respect to the upper center line CL in the X direction. Further, the disc support / guide member 91 is urged in the X1 direction by the coil spring 96.

[0052] Further, the opposing disc support / guide members 90 and 91 form a flat space 95 for receiving the disc 11. This space 95 expands in the X direction when the disc support / guide members 90 and 91 are separated from each other, and the width in the X direction changes.

[Turntable / Optical Pickup Unit 26] As shown in FIGS. 1, 2, 5, 6, and 14, the turntable / optical pickup unit 26 has a flat shape and has a flat shape. The housing 100 has a shape of a plate and incorporates a turntable 14, an optical pickup 17, a turntable motor 101, and an optical pickup moving mechanism 102.

[0054] The surface 100a on the Y2 direction side of the housing 100 is provided with a pin-shaped protrusion 103, and the surface 100b on the Y2 direction side is provided with two pin-shaped protrusions 104 and 105.

[0055] In the unit 26, the pin-shaped protrusion 103 is cut out and fitted into the guide groove 40a1 of the piece 40a2, and the pin-shaped protrusions 104 and 105 are fitted into the guide grooves 40b1 and 40b2 of the back plate portion 40b, respectively, to form a base. It is supported on the upper surface of the member 40 so as to be positioned and movable in the Z1 and Z2 directions.

[Turntable / Optical Pickup Unit Elevating Mechanism 27] As shown in FIGS. 1, 2, 3, 7, and 14, the turntable / optical pickup unit elevating mechanism 27 is a first slide plate 70. (See FIG. 11), a second slide plate 110, and a connecting lever 113, which are provided on the upper surface of the base member 40. The turntable / optical pickup unit 26 is usually located in a position lowered in the Z2 direction.

[0057] In the first slide plate 70, the slit 70g is in a state of being fitted to the cut-up piece 40a2, and the oblique slit 70f faces the guide groove 40a.

As shown in FIG. 7, the second slide plate 110 fits the elongated holes 110a1, 110a2, 110b1, 110b2 into the pins 111a, 111b, 112a, 112b crimped to the back plate portion 40b of the base member 40. In combination, it is provided so as to be slidable in the X1-X2 direction in a vertical posture inside the back plate portion 40b. Diagonal slits 110c and 110d are formed on the second slide plate 110. The diagonal slit 110c faces the guide groove 40b1, and the diagonal slit 110d faces the guide groove 40b2. The diagonal slits 70f and the diagonal slits 110c and 110d have opposite inclination directions.

[0059] The second slide plate 110 has a horizontal arm portion 110e along the upper surface of the bottom plate portion 40a on the end side in the X2 direction, and a rack portion 110f is formed on the horizontal arm portion 110e.

[0060] Further, a pair of lugs 110g and 110h related to the clamp release mechanism 29 are formed on the second slide plate 110.

[0061] The connecting lever 113 has a substantially central hole 113a rotatably attached to the upper surface of the bottom plate portion 40a by a pin 114 crimped to the bottom plate portion 40a, and has a first pinion portion 113b and a first pinion portion 113b at an end in the Y2 direction. It has a slit 113c and has a second pinion portion 113d and a slit 113e at the end in the Y1 direction. The pinion portions 113b and 113d and the slits 113c and 113e are formed along the arc of a circle centered on the pin 114. On the upper surface of the bottom plate portion 40a, the pinion portion 113b is abutted and meshed with the rack portion 70c of the X-direction sliding lever 70, and the pinion portion 113d is abutted and meshed with the rack portion 110f of the second slide plate 110. ..

[0062] Therefore, when the first slide plate 70 slides in the X2 direction, the first slide plate 70, the second slide plate 110, and the connecting lever 113 pass through the rack portion 70c and the pinion portion 113b. , The connecting lever 113 is rotated clockwise, the second slide plate 110 slides in the X1 direction via the pinion portion 113d and the rack portion 110f, and conversely, the first slide plate 70 slides in the X1 direction. When sliding to, the connecting lever 113 is rotated counterclockwise, and the second slide plate 110 slides in the X2 direction.

[0063] As shown in FIG. 3, pins 115 and 116 with heads crimped to the bottom plate portion 40a hold the edges of the slits 113c and 113e, and the pinion portions 113b and 113d are restricted from floating from the bottom plate portion 40a. are doing. Therefore, the engagement between the pinion portion 113b and the rack portion 70c and the engagement between the pinion portion 113d and the rack portion 110f are ensured.

[0064] The pin-shaped protrusion 103 of the housing 100 is fitted into the diagonal slit 70f and the guide groove 40a1, and the pin-shaped protrusion 104 is fitted into the diagonal slit 110c and the guide groove 40b1 to form a pin. The protrusion 105 fits into the diagonal slit 110d and the guide groove 40b2.

Therefore, when the X-direction sliding lever 70 slides in the X2 direction, the second slide plate 110 slides in the X1 direction via the connecting lever 113, and the diagonal slits 70f, 110c, and 110d are pinned, respectively. The turntable / optical pickup unit 26 is raised in the Z1 direction by pushing up the projections 103, 104, and 105. Conversely, when the first slide plate 70 slides in the X1 direction, the second slide plate 110 slides in the X2 direction via the connecting lever 113, and the diagonal slits 70f, 110c, and 110d are pin-shaped protrusions, respectively. The turntable / optical pickup unit 26 is lowered in the Z2 direction by lowering 103, 104, and 105.

[0066] The connecting lever 113, the first slide plate 70, and the second slide plate 110 are arranged in a plane on the bottom plate portion 40a and do not overlap each other. Therefore, the optical pickup unit elevating mechanism 27 is not bulky and is thin.

[Clamp mechanism 28] As shown in FIGS. 4, 6, 15, 16 (A) and 16 (B), the clamp mechanism 28 includes a clamper 15, a clamper support member 123, and a turntable 14. It is a configuration having. 16 (A) and 16 (B) show the state before clamping, and FIG. 24 shows the clamped state.

As shown in FIG. 16B, the clamper 15 has a configuration in which a circular iron plate member 122 is fixed to the center of a clamper main body 121 made of synthetic resin. The clamper main body 121 has a clamp portion 121a that presses against the disc, and a flange portion 121b that extends outward from the clamp portion 121a. A concave recess 121c is formed upward on the lower surface side of the clamp portion 121a. The circular iron plate member 122 is exposed on the ceiling of the recess 121c.

[0069] The clamper support member 123 has a half shape of a ring, that is, a substantially U-shape, and has an inner flange portion 123a projecting inward in a flange shape and an attachment projecting outward in a flange shape. It has a part 123b and. The clamper support member 123 is attached by fixing the attachment portion 123b to the lower surface of the top plate portion 41a of the cover member 41. As shown in FIG. 4, the clamper support member 123 is attached with the opening 123c facing the X2 direction in relation to the arrangement with the clamp release member 130 described later. The U-shaped fork portion 130a of the clamp release member 130 faces the opening 123c.

[0070] As shown in FIGS. 16A and 16B, the turntable 14 has a peripheral flange portion 14a and a central convex portion 14b. The central convex portion 14b has an inclined surface 14b1 around it and has a truncated cone shape. The central convex portion 14b has a concave portion 14b2 on the upper surface. A disc-shaped back yoke 124 and a disc-shaped permanent magnet 125 magnetized in the thickness direction are fitted and incorporated in the spindle 16a of the motor 16 in the recess 14b2.

[0071] In the initial state, the clamp mechanism 28 is in the state shown in FIGS. 16A and 16B. The clamp release member 130 is fitted in the clamper support member 123. The clamper 15 is surrounded by the clamper support member 123 and the U-shaped fork portion 130a of the clamp release member 130 to prevent the clamper support member 123 from coming out, and the flange portion 121b is placed on the fork portion 130a to Z1. It is supported in a state of being displaced in the direction. The turntable 14 is located in the lowered position.

As will be described later, when the disc 11 is pushed into the device and the first slide plate 70 and the second slide plate 110 slide, the clamp release member 130 is clockwise in FIG. It rotates as shown by the dotted chain line to escape from the clamper support member 123, and the turntable 14 rises in the Z1 direction.

When the turntable 14 rises in the Z1 direction, the central convex portion 16b fits into the central hole 11b of the disc 11 to position the disc 11, and the flange portion 16a is the central hole 11b of the lower surface of the disc 11. Support the surrounding area of. When the clamp release member 130 comes out of the clamper support member 123, the clamper 15 is released from the support by the fork portion 130a, is displaced in the Z2 direction, and the iron plate member 122 is attracted to the permanent magnet 125, as shown in FIG. , The clamper 15 is magnetically attracted to the turntable 14, the clamper 15 presses the portion of the upper surface 11d of the disk 11 around the center hole 11b, and the disk 11 is clamped onto the turntable 14. There is a gap 127 between the permanent magnet 125 and the iron plate member 122.

[0074] Here, in the clamping mechanism 28, in the state before clamping shown in FIGS. 16A and 16B, and before the disc 11 is clamped, the magnetic force of the permanent magnet 125 is applied to the iron plate member 122. The iron plate member 122 acts with a strength that attracts it to a position directly above the permanent magnet 125. Therefore, the clamper 15 is pulled and centered at a position directly above the turntable 14. Therefore, when the above disc 11 is clamped on the turntable 14, the recess 121c of the clamper 15 is smoothly and securely fitted to the central convex portion 14b of the turntable 14, and the disc 11 is placed on the turntable 14. Clamping to is ensured.

[Clamp release mechanism 29] As shown in FIGS. 2, 4, 15, 16 (A) and 16 (B), the clamp mechanism 28 includes a clamp release member 130 and a second slide plate 110. It is a configuration having.

[0076] The clamp release member 130 has a U-shaped fork portion 130a on one end side and a lug portion 130b bent in the Z2 direction on the other end. The fork portion 130a has a size that allows it to enter the inside of the clamper support member 123 from the lateral direction, and has wedge-shaped tip portions 130a1 and 130a2 as shown in FIG. 16A so as to facilitate entry.

[0077] In this clamp release member 130, the hole 130c at a position closer to the lug portion 130b from the center is supported by a pin 131 with a head crimped to the top plate portion 41a of the cover member 41, and the fork portion 130a The edge 130a3 is supported by the receiving portion 41a5 of the top plate portion 41a, and is supported by the lower surface of the top plate portion 41a. The lug portion 130b is engaged between a pair of lugs 110g and 110h of the second slide plate 110. Therefore, the clamp release member 130 is rotated on the lower surface side of the top plate portion 41a in parallel with the top plate portion 41a in response to the movement of the second slide plate 110 in the X direction. The fork portion 130a is located on the X2 side of the clamper support member 123.

As shown in FIG. 24, when the disc 11 is magnetically clamped on the turntable 14 by the clamper 15 and a command to eject the disc 11 is input, the second slide plate 110 is X2. Moving in the direction, the clamp release member 130 rotates counterclockwise, the fork portion 130a enters the clamper support member 123, enters the gap between the inner flange portion 123a and the flange portion 121b, and pushes up the flange portion 121b. , The clamper 15 is released from magnetic attraction with the turntable 14, separated from the turntable 14, and the clamp of the disk 11 is released.

[0079] Since the clamper support member 123 is fixed to the lower surface of the top plate portion 41a of the cover member 41 and the clamp release member 130 moves in parallel with the lower surface of the top plate portion 41a, the clamp release mechanism 29 Has a thin structure.

[Disk center hole hooking support mechanism 30] As shown in FIGS. 2, 4, 17, and 18 (A) and 18 (B), the disc center hole hooking support mechanism 30 includes a hook member 140 and a U. It has a shape-shaped leaf spring member 141 and a part of the X1 side disc support / guide member 90, and is provided on the lower surface of the top plate portion 41a of the cover member 41.

[0081] The hook member 140 has a hook portion 140a for hooking the disc center hole 11b at one end, an arm portion 140b at the other end, and shaft portions 140c and 140d protruding on both sides in the middle. One end 141a of the U-shaped leaf spring member 141 is fixed to the upper surface of the hook member 140.

[0082] The hook member 140 is supported by bearing portions 41a6 and 41a7 formed by cutting and raising the shaft portions 140c and 140d into the top plate portion 41a, and the other end portion 141b of the leaf spring member 141 is the top plate portion. The U-shaped leaf spring member 141 is elastically deformed in the direction of being crushed in contact with the lower surface of the top plate portion 41a and attached to the lower surface of the top plate portion 41a. The shaft portions 140c and 140d are oriented in the X direction, the hook member 140 is oriented in the Y direction, and the hook portion 140a is located on the Y2 direction side and is downward.

[0083] The arm portion 140b on the Y2 direction side of the hook member 140 is in contact with the lower surface of the arm portion 90d of the X1 side disc support / guide member 90. The arm 90d is formed with a step 90g protruding in the Z2 direction.

[0084] In the initial state, the step portion 90f is in contact with the arm portion 140b, the hook member 140 is in a substantially horizontal state as shown in FIG. 18 (A), and the hook portion 140a is raised in the Z1 direction. , It is retracted above the moving passage of the disk 11. When the X1 side disc support / guide member 90 moves in the X1 direction, the step portion 90f is disengaged from the arm portion 140b, and the hook member 140 uses the leaf spring member 141 to separate the shaft portion 140c as shown in FIG. It rotates counterclockwise to the center and inclines, and the hook portion 140a descends in the Z2 direction, enters the moving passage of the disc 11, and is in a state where the disc center hole 11b can be hooked.

[0085] The above is the configuration of each mechanism of the disk loading device 10.

Next, the operation of each of the above mechanisms when loading the disk 11 will be described.

[0087] In the state before loading the disk 11, each of the above mechanisms is in the state shown in FIGS. 3, 4, 12, 12, 13, 16 (A), 16 (B), and 18 (A). .. In the disc support / guide mechanism 25, as shown in FIGS. 4, 5 and 19 (G), the disc support / guide members 90 and 91 are close to the center line CL side, and the width in the X direction is W1. It is in a "narrow" state. The width W1 is smaller than the diameter D of the disc 11.

19 (A) to 19 (K) show the operations of the respective members in correspondence with each other.

[0089] As shown in FIG. 19 (K), the bare disc 11 taken out from the case by the operator is halved in the disc insertion slot 13 of the front bezel 12 in a horizontal posture with the recording surface 11a facing downward. Perform the above insertion operation (t0-t6). In FIG. 19 (K), the broken line shows the manual movement, and the solid line shows the mechanical movement.

By this operation, as shown in FIG. 4, about a quarter of the disk 11 on the Y1 side enters the space 95 of the disk support / guide mechanism 25 in the narrow state, and at t1, the peripheral edge. 11c abuts on the edges 90a1 and 91a1 of the side plate portions 90a and 91a of the disc support / guide members 90 and 91 in the Y2 direction. Here, since the disc support / guide members 90 and 91 are positioned symmetrically with respect to the center line CL on the X direction, the disc 11 should be positioned on the X direction so that the center of the center hole 11b coincides with the center line CL. It is stipulated in. Since the disk support / guide members 90 and 91 move in the same distance in opposite directions in an interlocking manner and always maintain a symmetrical relationship with respect to the upper center line CL in the X direction, the center of the center hole 11b of the disk 11 is maintained. Is maintained in the same state as the center line CL even after the disk 11 further enters the space 95 of the disk support / guide mechanism 25.

[0091] When the disc 11 is further pushed, the disc support / guide members 90 and 91 are pushed by the peripheral edge 11c and moved in a direction away from each other to the left and right, and the disc 11 expands the space 95 in the X direction and enters the space 95. enter in.

When the disc support / guide member 91 moves in the X2 direction (between t1-t5), the pin 71f relatively moves in the slit portion 91g1 of the slit 91g in the X1 direction.

[0093] When half of the disc 11 enters the space 95, the end portion of the peripheral edge 11c having the diameter D of the disc 11 comes into contact with the inner surfaces of the side plate portions 90a and 91a. The width of space 95 in the X direction is W2, which is equal to the diameter D of disk 11. The disc 11 is supported in a horizontal position. After that, the disc 11 is in a state in which the end portion of the peripheral edge 11c having the diameter in the X direction of the disc 11 is guided by the inner surfaces of the side plate portions 90a and 91a, and the center of the center hole 11b of the disc 11 coincides with the center line CL. Move in the Y1 direction while maintaining.

[0094] As shown in FIG. 22, the Y1 side of the disc 11 moves to Y1 through between the clamper 15 and the turntable 14.

[0095] Here, since the disc support surfaces 90c1 and 91c1 of the disc support / guide members 90 and 91 are inclined, as shown in FIGS. 5 and 8 (A), the disc 11 is the peripheral edge of the recording surface 11a. The edge portion 11a1 facing 11c is in contact with the disc support surfaces 90c1 and 91c1, and the recording surface 11a is in a state of floating away from the disc support surfaces 90c1 and 91c1. As a result, the recording surface 11a of the disc 11 is rubbed in the process of the disc 11 entering the space 95 of the disc support / guide mechanism 25 and the process of the disc 11 described later leaving the space 95 of the disc support / guide mechanism 25. Therefore, it is not damaged and is protected.

[0096] The disc insertion slot 13 has a flat inverted trapezoidal shape so that the recording surface 11a is not rubbed even when the disc 11 passes through the slot 13.

Second, when the disc support / guide members 90 and 91 are moved to the left and right in a direction away from each other, the step portion 90f is disengaged from the arm portion 140b, and the hook member 140 is shown in FIG. 18 (B). It can be tilted as shown. As shown between t2-t4 in FIG. 19 (H), the hook portion 140a once enters the central hole 11b of the disk 11 and is pushed up at a portion near the opposite edge of the central hole 11b.

Third, as shown in FIG. 20, the peripheral edge 11c of the inserted disc 11 pushes the pin 80c, and the first arm 80 is rotated counterclockwise while twisting the torsion coil spring 81. As shown in FIG. 19A, the switch SW2 is turned on and the motor 21 is started. Here, since the oil damper 82 is connected to the first arm 80, the oil damper 82 is effective, and the disc 11 is inserted slowly with an appropriately heavy feel.

[0099] After that, each mechanism of the disk loading device 10 is mainly operated by the motor 21.

[0100] The rotation of the motor 21 is transmitted to the plate mechanism 23 via the reduction gear mechanism 22, and the crank-shaped slit 71c and the pin 70d fitted thereto are shown in FIGS. 19 (F) and 19 (D). As shown, the loading plate 71 first slides in the Y1 direction between t6-t7, then temporarily stops, and during this stop (between t7 and t8) the first slide plate 70 slides X2. After sliding in the direction and stopping and the first slide plate 70 is stopped, the loading plate 71 slides in the Y1 direction again between t8 and t9.

[0101] By sliding the loading plate 71 and the first slide plate 70, the disc pushing / pushing mechanism 24, the disc support / guide mechanism 25, the turntable / optical pickup unit elevating mechanism 27, the clamp mechanism 28, and the clamp releasing mechanism 29. , The disc hooking support mechanism 30 is operated at a predetermined timing.

Action performed by the first sliding of the loading plate 71 (t6-t7): First, the first arm 80 of the disc pushing / pushing mechanism 24 is pushed by the lug 71e, FIG. 19 ( As shown in I) and FIG. 21 (A), the pin 80c is rotated counterclockwise (CCW) and the pin 80c is retracted in the Y1 direction.

Second, the second arm 83 guides the pin-shaped protrusion 83b to the slit 71d1 of the slit 71d, counterclockwise (CCW) as shown in FIGS. 19 (J) and 21 (A). The disk 11 is completely pushed into the disk loading device 10 by pushing the peripheral edge 11c on the Y2 direction side of the disk 11 which is rotated in the direction and the convex portion 83a is inserted halfway. The disc 11 is in the state shown in FIG. 22 in which the central hole 11b is located directly above the turntable 14.

[0104] The pin 71f moves in the Y1 direction in the slit portion 91g2 of the slit 91g. The pin 70d relatively moves in the slit portion 91g2 of the slit 91g in the Y1 direction.

Action performed by sliding the first slide plate 70 in the X2 direction (t7-t8): When the first slide plate 70 slides in the X2 direction, the second slide plate via the connecting lever 113 110 is slid in the X1 direction as shown in FIG. 19 (E), and the turntable / optical pickup unit elevating mechanism 27 is raised in the Z1 direction as shown in FIG. 19 (B). As a result, the central convex portion 14b of the turntable 14 is fitted into the central hole 11b of the disc 11, and the flange portion 14a supports the disc 11. Further, the optical pickup 17 approaches the recording surface 11a of the disc 11.

[0106] Further, by sliding the second slide plate 110 in the X1 direction, the clamp release member 130 is rotated in the clock (CW) direction as shown in FIG. 23 (B), and the fork portion 130a is a clamper support member. After exiting 123, the clamper 15 is unlocked as shown in FIG. 19 (C). The unlocked clamper 15 is magnetically attracted to the turntable 14 by a permanent magnet 125, and the disc 11 is clamped onto the turntable 14 as shown in FIG.

Action performed by re-sliding the loading plate 71 (t8-t9): First, the first arm 80 of the disc pushing / pushing mechanism 24 is further pushed by the lug 71e, FIG. As shown in (I) and FIG. 25 (A), the pin 80c is rotated in the counterclockwise (CCW) direction, and the pin 80c is displaced in the X2 direction away from the peripheral edge 11c of the disk 11.

Second, the second arm 83 guides the pin-shaped convex portion 83b to the Y-direction slit portion 71d2 at the end of the slit 71d, as shown in FIGS. 19 (J) and 25 (A). The convex portion 83a is displaced in the substantially X2 direction and is separated from the peripheral edge 11c of the disk 11 by being slightly rotated clockwise.

Third, the pin 71f enters the slit portion 90g3, and as shown in FIGS. 19 (G) and 25 (B), the disc support / guide member 91 is slightly moved in the X2 direction to support the disc. -The guide member 90 is slightly moved in the X1 direction, and the disc support / guide mechanism 25 is in the "wide" state. The width of space 95 in the X direction is W2, which is larger than the diameter D of disk 11. As a result, as shown in FIG. 8B, the inner surfaces of the side plate portions 90a and 91a of the disc support / guide members 90 and 91 are separated from the peripheral edge 11c of the disc 11. Further, since the disk support surfaces 90c1 and 91c1 are inclined, the disk support / guide members 90 and 91 move in directions away from each other, so that the disk support surfaces 90c1 and 91c1 become the lower end of the peripheral edge 11c of the disk 11, that is, the above. Move away from the edge 11a1 of the recording surface 11a. In FIG. 8B, 150 and 151 are gaps formed between the edge portion 11a1 and the disk support surfaces 90c1 and 91c1.

[0110] By the first, second, and third operations described above, the disk 11 is released from the restraint on the peripheral edge 11c, is in a state of freely rotating, and is in a state of being loaded in the disk loading device 10. By this time, the switch SW1 has been repeatedly turned on and off a predetermined number of times, and the motor 21 is stopped.

Subsequently, the turntable / optical pickup unit 26 operates, the disc 11 is rotated, and is reproduced by the optical pickup 17 (t10-t11).

Next, the operation of each mechanism when unloading the disk 11 will be described.

[0113] When the eject operation is performed after the reproduction is completed, the motor 21 starts and reverses, and as shown between t12 and t15 in FIGS. 19 (D) and 19 (F), the first slide plate 70 of the plate mechanism 23 Operates in the reverse order and in the reverse direction of the above disk loading. That is, as shown in FIGS. 19 (F) and 19 (D), the loading plate 71 first slides in the Y2 direction between t12 and t13, then temporarily stops, and during this stop (t13-). The first slide plate 70 slides in the X1 direction and stops, and after the first slide plate 70 stops, the loading plate 71 slides again in the Y2 direction between t14 and t15. The plate mechanism 23 returns to its initial state.

Action performed by the first sliding of the loading plate 71 (t12-t13): The second arm 83 rotates slightly counterclockwise as shown in FIGS. 19 (J) and 23 (A). Then, the convex portion 83a abuts on the peripheral edge 11c of the disk 11. Further, the rug portion 71e moves in the Y2 direction, and the restoring force of the torsion coil spring 82 causes the first arm 80 to be rotated clockwise as shown in FIGS. 19 (I) and 23 (A) to pin the pin. 80c abuts on the peripheral edge 11c of the disk 11. As shown in FIGS. 19 (G) and 23 (B), the disc support / guide members 90 and 91 move in a direction approaching each other, and the inner surfaces of the side plate portions 90a and 91a abut on the peripheral edge 11c of the disc 11. As a result, the peripheral edge 11c of the disk 11 is constrained.

Action performed by sliding the first slide plate 70 in the X1 direction (t13-t14): When the first slide plate 70 slides in the X1 direction, the second slide plate via the connecting lever 113 110 is slid in the X2 direction as shown in FIG. 19 (E), and the turntable / optical pickup unit elevating mechanism 27 is lowered in the Z2 direction as shown in FIG. 19 (B). Further, by sliding the second slide plate 110 in the X1 direction, the clamp release member 130 is rotated counterclockwise as shown in FIG. 23 (B), and the fork portion 130a enters the clamper support member 123. The clamper 15 is pushed up against the magnetic attraction force of the permanent magnet 125 as shown in FIG. 19 (B). As a result, as shown in FIG. 22, the central convex portion 16b of the turntable 14 is pulled out from the central hole 11b of the disc 11, the clamper 15 is separated from the turntable 14, and the disc 11 is unclamped. To.

Action performed by re-sliding the loading plate 71 (t14-t15): First, the second arm 83 is guided through the pin-shaped convex portion 83b by the slit 71d, and FIG. 19 (J). And as shown in FIG. 20, the convex portion 83a is retracted from the passage of the disk 11 by being rotated clockwise.

Secondly, as the lug portion 71e moves in the Y2 direction, the first arm 80 is rotated clockwise by the torsion coil spring 81, and the pin 80c pushes the peripheral edge 11c of the disk 11 to push the disk 11 Is moved in the Y2 direction and pushed out of the front bezel 12 to be ejected. The disc 11 is moved while being guided by the inner surfaces of the side plate portions 90a and 91a of the disc support / guide members 90 and 91. Further, the oil damper 82 is effective, the rotation of the first arm 80 is performed at a low speed behind the sliding of the loading plate 71, and the ejection of the disc 11 is performed at a low speed.

[0118] The step portion 90f is detached from the arm portion 140b, and the hook member 140 is in a tiltable state as shown in FIG. 18 (B). When the disc 11 is moved in the Y2 direction and the center hole 11b faces the hook portion 140a, the disc hooking support mechanism 30 is moved between t17 and t18 in FIG. 19 (H) in FIGS. 26 (A) and 26 (B). It operates as shown, the hook portion 140a falls into the central hole 11b of the disc 11, and the hook portion 140a locks the edge of the central hole 11b. Therefore, as shown in FIGS. 26A and 26B, the disc 11 is hooked on the edge of the center hole 11b by the hook member 140 to stop the movement in the Y2 direction, and half of the disc 11 is from the front bezel 12. It is in a state of being supported so that it does not fall while protruding outward. FIGS. 26 (A) and 26 (B) show a state in which unloading is completed.

[0119] In this state, the operator inserts the finger of the hand into the central hole 11b of the disc 11, grips and pulls the disc 11 between the peripheral edge 11c and the edge of the central hole 11b. As a result, the hook portion 140a rises on the upper surface of the disc 11 and comes off from the center hole 11b, and the disc 11 is taken out.

[0120] When the disc 11 is taken out, the disc support / guide members 90 and 91 are further approached by the spring 96, the disc support / guide mechanism 25 is in the initial "narrow" state, and the hook portion 40a is in the process. Ascend in the Z1 direction.

[0121] The present invention is not limited to the above embodiment, and it is also possible to have a configuration in which the disk 11 is inserted in a vertical direction and the turntable / optical pickup unit 26 moves in the X1 and X2 directions.

[Effects of the Invention] As described above, the invention of claim 1 is in a disk loading device in which a disk is inserted and loaded onto a turntable, and then the disk is ejected to the outside and unloaded. Since the first arm and the second arm are rotatably provided in a plane parallel to the moving surface of the disc, long rollers crossing the disc are provided on the upper side and the lower side of the disc passage. It is possible to reduce the thickness as compared with the configuration provided with.

[0123] Further, the first arm and the second arm each have a locking portion, and the locking portion locks and pushes the peripheral edge of the disk so as to push the disk into the disk loading device and disk loading. Since the configuration is such that the first arm and the second arm do not come into contact with the recording surface of the disc because the configuration is such that the first arm and the second arm are moved in the direction of discharging to the outside of the device, therefore, loading and unloading of the disc may damage the recording surface of the disc. Can be done without.

[0124] Further, since the locking portions of the first arm and the second arm are configured to lock and push the peripheral edge of the disc to move the disc, the disc is moved by utilizing the conventional friction. In comparison, disk loading and unloading can be performed reliably.

【0125】<u style="single">Furthermore, b</u>Since the disc is supported and guided in the process of being loaded and has a disc support guide member that separates from the disc when the disc is played, the disc can be smoothly and stably moved to the loading position. You can. Further, since the disc support guide member is separated from the disc during playback of the disc, it does not impose a load on the rotation of the disc during playback and can prevent the disc from being damaged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the inside of a disk loading device according to an embodiment of the present invention.

FIG. 2 is an exploded view of the disk loading device of FIG.

3 is a plan view showing a mechanism attached to the base member of the disk loading device of FIG. 1. FIG.

4 is a plan view showing a mechanism attached to the lower surface of a cover member of the disk loading device of FIG. 1. FIG.

5 is a schematic front view of the disk loading device of FIG. 1. FIG.

6 is a schematic side view of the disk loading device of FIG. 1. FIG.

7 is a rear view of the disk loading device of FIG. 1. FIG.

8 is a front view of the device for explaining the schematic operation of the disk loading device of FIG. 1. FIG.

9 is a side view of the device for explaining the schematic operation of the disk loading device of FIG. 1. FIG.

FIG. 10 is a diagram showing a gear mechanism.

FIG. 11 is a diagram showing a plate mechanism.

FIG. 12 is a diagram showing a disc pushing / pushing mechanism.

FIG. 13 is a diagram showing a disc support / guide mechanism.

FIG. 14 is a diagram showing a turntable / optical pickup unit and a unit elevating mechanism.

FIG. 15 is a diagram showing a clamp mechanism and a clamp release mechanism.

FIG. 16 is a diagram showing a clamp mechanism and a clamp release mechanism in a clamp release state.

FIG. 17 is an exploded perspective view showing a disc hooking support mechanism.

FIG. 18 is a side view showing a disc hooking support mechanism.

FIG. 19 is a time chart showing the operation of each component during disk loading and disk unloading.

FIG. 20 is a diagram showing a state when a disc is inserted.

FIG. 21 is a diagram showing a state when the disk is completely pushed into the device and a state when the disk is inserted.

FIG. 22 is a diagram showing a positional relationship between a disc, a clamper, and a turntable in FIG. 21.

FIG. 23 is a diagram showing a state in which a disc is clamped.

FIG. 24 is a diagram showing a clamping mechanism in a state where a disc is clamped.

FIG. 25 is a diagram showing a state in which loading of a disk is completed.

FIG. 26 is a diagram showing a state in which unloading of a disk is completed.

[Code description] 10 Disc loading device 11 Disc 14 Turntable 17 Optical pickup 20 Housing 21 Motor 22 Reduction gear mechanism 23 Plate mechanism 24 Disc pushing / pushing mechanism 25 Disc support / guide mechanism 26 Turntable / optical pickup unit 27 turns Table / Optical Pickup Unit Lifting Mechanism 28 Clamp Mechanism 29 Clamp Release Mechanism 30 Disc Hook Support Mechanism 40 Base Member 41 Cover Member 53 Planetary Gear Mechanism 70 1st Slide Plate 71 Loading Plate 80 1st Arm 80c Pin 82 Oil Damper 83 Arm of 2 83c Convex part 90 X1 side disc support / guide member 91 X2 side disc support / guide member 90a, 91a Side plate part 90c, 91c Lower plate part 90c1, 91c1 Disc support surface 92 Pinion 110 Second slide Plate 113 Coupling lever 123 Clamper support member 130 Clamp release member 140 Hook member