JP2009099205A - Disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To downsize a comparatively large clamper supporting body, and to smoothly center a disk by a clamper. <P>SOLUTION: A rotation center axis for a floating chassis 60 of the clamper supporting body 124 is set between left and right side plates 66, 67 of the floating chassis 60 at a position deeper than the center axis line of a turntable 13. The distance K from the center axis line of the turntable 13 to the rotation center axis is set larger than a center hole diameter of the disk and within two times the diameter. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disc player that can downsize a clamper support, which is a relatively large component, and facilitates centering of the disc by the clamper.

  2. Description of the Related Art Conventionally, various disk players have been proposed in which a clamper support that supports a clamper is rotated to bring the clamper closer to a turntable and hold the disk between the clamper and the turntable.

Japanese Patent Application Laid-Open No. 9-128859 describes the following disk clamp device.
That is, the clamper 8 is rotatably supported by a clamp arm (clamper support) 6, and a support shaft (rotation center axis) 5 of the clamp arm 6 is provided at the innermost end of the unit chassis 1, and the chassis is provided by a coil spring 9. A disc clamping pressure is generated between 1 and the clamp arm 6. A pressing plate 7 that presses the pivot 8b of the clamper 8 is fixed to the tip 6a of the clamp arm 6.

When the disc is inserted, the clamp arm 6 rotates about the support shaft 5, the disc is clamped between the clamper 8 and the rotary table (turn table) 4, and the disc is reproduced.
Japanese Patent Laid-Open No. 9-128859

In the disk clamp device disclosed in Japanese Patent Laid-Open No. 9-128859, the rotation center axis of the clamper support is at the innermost end of the chassis. Therefore, the clamper support is a relatively large part that extends from the innermost end of the disc player to the clamper.
Furthermore, generally, the clamper is provided with a substantially frustoconical protrusion that fits into the center hole of the disk, and the taper surface of this protrusion is brought into sliding contact with the edge of the center hole of the disk to center the disk. Therefore, it is desirable to reduce the angle of the tapered surface in order to perform centering smoothly. However, if this angle is reduced, the amount of eccentricity of the disc that can be centered will decrease, so in order not to reduce the amount of eccentricity, the height of the protrusion must be increased, and the size of the disc player becomes larger. There is a problem that it is difficult to achieve both smoothing of the centering and downsizing.

The present invention has been made in view of these problems, and a disc player suitable for miniaturization that can smoothly center the disc by the clamper without increasing the height of the substantially frustoconical protrusion of the clamper. The purpose is to provide.

  A clamper support that supports the clamper is rotatably mounted on the chassis that supports the turntable, and the clamper is moved closer to the turntable by the rotation of the clamper support so that the substantially truncated cone-shaped protrusion of the clamper is placed on the disk. In a disk regenerator that performs centering by being fitted into a center hole and applies a disk clamping pressure between the turntable and the clamper by a spring, a rotation center axis of the clamper support with respect to the chassis is set to the turntable. The distance between the center axis of the turntable and the rotation center axis is set to be larger than the center hole diameter of the disk and within twice the center hole diameter.

  The inner edge of the clamper support may be inclined toward the inner side from the center to the left and right so that the inserted disc passes through the inner edge and is loaded.

  According to the disc player of the present invention, the clamper support has an extremely small size particularly in the disc insertion direction, becomes a part elongated in the left-right direction, and can be made much smaller than the conventional clamper support. In addition, since both ends in the longitudinal direction of the clamper support are attached between the left and right side plates of the chassis, the strength of the clamper support is increased compared to the conventional case where the clamper support that is long in the disk insertion direction is attached only on the back side. You can also.

  In addition, since the distance between the center axis of the turntable and the rotation center axis of the clamper support is greatly shortened, if the distance between the clamper and the turntable is constant, the rotation angle of the clamper support is large. Accordingly, the clamper also comes in contact with the turntable while being largely rotated. When the taper surface of the substantially frustoconical protrusion on the clamper side starts to come into sliding contact with the edge of the disk center hole, the angle of the taper surface tip with respect to the edge of the disk center hole becomes gentler by the inclination with respect to the disk. . As a result, centering smoothness is disadvantageous, but the amount of disk eccentricity that can be centered tends to increase. Therefore, the angle of the taper surface can be reduced to maintain centering smoothness, and at the same time, the eccentric amount of the disk that can be centered while pressing the clamper height can be maintained. Can be achieved.

  In addition, the rear edge of the clamper support is inclined toward the back from the center to the left and right so that the disk passes through the rear edge of the clamper support so that the disk Even if it contacts the edge, contact with the upper surface of the disk can be avoided, and contact with only the edge of the disk can be stopped.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an external appearance of a mechanism unit 1 of an in-vehicle disk reproducing apparatus. A disc insertion slot 2 through which the disc D is inserted is provided in front of the mechanism unit 1 of the disc reproducing apparatus. Arrow A indicates the disc insertion direction, and the opposite direction is the disc ejection direction. The disc insertion direction and the disc ejection direction are combined to obtain the disc insertion direction.

FIG. 2 is an exploded perspective view showing the mechanism unit 1 of the disk reproducing apparatus divided into an upper unit 3 and a lower unit 4, and further showing a pickup unit 5 and a clamp mechanism 6 which are part of the lower unit 4 separately. It is.
FIG. 3 is a plan view showing the upper unit 3, and FIG. 4 is a plan view showing a part of the lower unit 4 excluding the pickup unit 5 and the clamp mechanism 6. FIG. 5 is a plan view showing the pickup unit 5.

As shown in FIGS. 2 and 3, the upper unit 3 includes an upper frame 7 and a disk detection mechanism 8. As shown in FIGS. 2, 4 and 5, the lower unit 4 includes a lower frame 10, a damper 11 including three buffer members attached to the lower frame 10, a transport roller mechanism 12, and a turntable. 13 and a pickup unit 5 including a pickup 14, a clamp mechanism 6 and the like.
The upper frame 7 and the lower frame 10 constitute a fixed chassis 15.

  As shown in FIGS. 2 and 3, the upper frame 7 made of a substantially rectangular metal plate has side plates bent downward from the four sides of the top plate 18, and the left and right side plates 19 and 20 are inserted into the disc. Overlapping portions 21 and 22 are provided at the front and rear in the direction, respectively.

  2 and 4, the lower frame 10 made of a substantially rectangular metal plate has side plates that rise above the four sides of the bottom plate 23, and the left and right side plates 24, 25 are arranged in front of the disc in the disc insertion direction. Overlapping parts 26 and 27 are provided in the part and the rear part, respectively. Then, when the upper frame 7 and the lower frame 10 are combined, the overlapping portions corresponding to each other are overlapped, and the respective rear overlapping portions 22 and 27 are fixed with screws 28 (only shown on the right side in FIG. 2). (See FIG. 1).

  As shown in FIGS. 2 and 3, the top plate 18 is provided with an opening 29 having a large opening substantially in the center, and is positioned in a direction perpendicular to the disk insertion direction with respect to the opening 29. A pair of extended pieces 30 that are second upper engaged portions are extended downward. In the front portion of the top plate 18, a long recess is formed in the left-right direction which is extruded downward from the upper surface side, and the portion is used as a mounting portion 31. Furthermore, a notch 33 is appropriately provided in the step portion 32 between the top plate 18 and the mounting portion 31. Further, a guide portion 34 is formed in the mounting portion 31.

  The disk detection mechanism 8 includes a pair of left and right horizontally rotatable disk detection members 35 and 36, a coil spring 37 (shown by phantom lines in FIG. 3) spanned between the detection members 35 and 36, and an engagement. It comprises a stop lever 38 and a switch (not shown). The disk detection mechanism 8 is attached to the upper surface of the mounting portion 31.

  The disc detection members 35 and 36 detect that a disc has been inserted, and are respectively rotatably mounted on a pair of support shafts 39 projecting from the upper surface of the mounting portion 31. Each of the extended ends extended to the vicinity of each has a detector 40, 41 (see FIG. 2) extending downward.

  The disc detection member 35 is formed with a connecting piece 42 extending rightward in the drawing, and a connecting pin 43 is formed upward at the tip thereof. On the other hand, the disc detecting member 36 is formed with a connecting piece 44 extending leftward in the drawing, and a connecting groove 45 is formed near the tip of the connecting piece 44. Then, the connecting pin 43 is engaged with the connecting groove 45 so that both the disk detecting members 35 and 36 are synchronously rotated in the left-right direction.

  Both disc detection members 35 and 36 are rotatable within the range of the notch 33, and each of the pair of stopper portions 46 formed on the upper surface of the mounting portion 31 by the biasing force of the coil spring 37. A part is brought into contact with each other to maintain the initial position. In addition, elastic pieces 47 and 48 are provided in the vicinity of the detection units 40 and 41, and these elastic pieces 47 and 48 are always elastically pressed against the upper surface of the mounting unit 31 to vibrate the detection members 35 and 36. To prevent rattle noise from occurring.

  The locking lever 38 is rotatably mounted on a support shaft 49 projecting from the upper surface of the mounting portion 31, and when the disk is inserted into the reproducing position, the disk detecting members 35 and 36 are locked at the rotating position. To do. The locking lever 38 has a pin 50 fitted to one of the disk detection members 36 at one end, and a sliding contact pin (not shown) which is located in the disk transport path and slidably contacts the outer periphery of the disk being transported at the other end. Each is formed. The locking lever 38 is urged to rotate by a very weak spring in the clockwise direction.

  As shown in FIGS. 2 and 4, the bottom plate 23 of the lower frame 10 is provided with a large opening 52 having a large opening, and the damper 11 is fixed to three positions on the upper surface of the bottom plate 23 around the large opening 52. A portion 53 is provided. Further, in the vicinity of the rear portion of the left side plate 24, an extrusion portion 54 having a chevron shape by extrusion processing is provided with the bottom plate 23 facing upward, and a part of the left side plate 24 is cut and bent toward the inside of the apparatus at a front position thereof. A cut and bent portion 55 is provided. The cut and bent portion 55 is provided with a hole 56 that is a substantially D-shaped engaged portion (see FIG. 11). Further, on the right side of the figure, a pair of bent portions 57 which are forward and rear engaged portions formed inward from the right side plate 25 are provided. Front and rear bent portions 57 and 57 are provided on the near side and the far side from the hole 56, respectively.

  The bases 58 of the three dampers 11 are fixed to the fixing portions 53 of the bottom plate 23, and the bottomed cylindrical portions 59 of the dampers 11 are attached to a part of the pickup unit 5, and the pickup unit 5 The lower frame 10 is supported in a floating state via the damper 11. Further, the transport roller mechanism 12 is disposed in the vicinity of the disc insertion opening 2 of the left and right side plates 24 and 25 of the lower frame 10.

  As shown in FIGS. 2 and 5, the pickup unit 5 is configured by attaching a pickup driving mechanism 61, a loading mechanism 62, and a disk rotating mechanism 63 to a floating chassis 60, which is partially shown by phantom lines.

  The floating chassis 60 is made of a metal plate and includes a substantially rectangular flat plate portion 65, left and right side plates 66 and 67 bent upward, a front plate 68 bent downward, and a rear plate 69 bent upward. Yes. The flat plate portion 65 has a rectangular hole 70 that is long from approximately the center to the upper left in FIG. 5, and the pickup 14 is disposed inside the rectangular hole 70 so as to be movable in the longitudinal direction of the rectangular hole 70. . Further, a rail portion 71 is provided in parallel with the longitudinal direction of the rectangular hole 70, and the rail portion 71 is sandwiched by a part of the pickup 14. In the flat plate portion 65, a groove 72 (shown by an imaginary line) is provided in the vicinity of the right side plate 67. Further, the flat portion 65 is provided with a pair of left and right stopper pieces 73 that restrict the insertion of the disc. A first motor 74 is disposed on the right side of the rectangular hole 70 in the figure.

  The pickup drive mechanism 61 includes a metal main guide rail 75 which is inserted through the pickup 14 and arranged in parallel with the rail portion 71, a synthetic resin feed screw 77 provided with a small gear 76 at one end, and the main guide. A first support member 78 and a second support member 79 that support both ends of the rail 75 and the feed screw 77, respectively, and a pickup feed plate 80 made of a thin plate that has one end fixed to the pickup 14 and the other end abutted against the feed screw 77. It is configured. The main guide rail 75, the small gear 76, the feed screw 77, and the first and second support members 78 and 79 are disposed on the lower surface side of the flat plate portion 65 of the floating chassis 60.

The loading mechanism 62 receives the driving force of the locking member 82 that locks the pickup 14, the driving force transmission means 83 that transmits the driving force of the first motor 74, and the first motor 74, and moves back and forth in the figure. The slide plate 84 and the trigger member 85 that detects immediately before the disk is chucked on the turntable 13 are configured. Although not shown, the lock member 82 is provided with a spring for urging the member clockwise, and the trigger member 85 is provided with a reversing spring.
The lock member 82, the driving force transmission means 83, and the trigger member 85 are disposed on the lower surface side of the flat plate portion 65, and the slide plate 84 is disposed on the right side plate 67.

  The lock member 82 is provided with a rotation fulcrum 86 at the substantially center, a sliding contact pin 87 on one side, and a lock portion 88 on the other side. The lock member 82 is urged to rotate clockwise by a spring (not shown).

  FIG. 6 is a side view showing the relationship between the slide plate 84 and its peripheral components. A cam groove 89 is provided at the center upper portion of the slide plate 84 in the drawing. Below this cam groove 89, a pair of through holes 94, 95 comprising slit portions 90, 91 having narrow vertical widths, which are front and rear engaged portions, and clearance portions 92, 93 having wide vertical directions. Is provided. Further, a cam surface 96 as a roller position switching portion is provided at the left end of the slide plate 84 in FIG. Further, as shown in FIG. 5, the slide plate 84 is provided with a pressed portion 97 that protrudes to the left in the drawing.

  The trigger member 85 is provided with a contacted portion 98 extending upward on one end side, a rack 99 on the other end side, and a rotating shaft 100 on an intermediate portion. Furthermore, a boss 101 protruding upward is also provided at the other end. The boss 101 is inserted into the groove 72 of the floating chassis 60.

  The disk rotation mechanism 63 includes a second motor 102 attached to the foremost portion of the rectangular hole 70 in the drawing, and the turntable 13 directly connected to the shaft of the second motor 102.

  As shown in FIGS. 5 and 7, the driving force transmission means 83 is mainly composed of a gear group, and switching means 103 that appropriately transmits the driving force of the first motor 74 to the transport roller mechanism 12 or the like or the pickup driving mechanism 61. The third support member 104 and the fourth support member 105 are configured.

  The gear group includes a worm gear 106 mounted on the shaft of the first motor 74, a first gear 107, a second gear 108 and a third gear 109 made of a two-stage gear, and a fourth gear 110 made of a three-stage gear. A fifth gear 113 formed integrally with the first worm 111 and the second worm 112 at both ends long in the disk insertion direction, and a sixth gear 114 comprising a two-stage gear attached to the fourth support member 105; It is comprised with the 7th gear 115 which is a connection gear. The seventh gear 115 is disposed at a position close to the cam surface 96 of the slide plate 84.

  The switching means 103 includes a switching plate 116 made of a metal plate indicated by an imaginary line, and the second gear 108 attached to the switching plate 116. The switching plate 116 has a shape in which a lower end portion in the drawing is bent to the right, has a tip portion as a pressing portion 117, and has a cam portion 120 including an arc portion 118 and an inclined portion 119 at the upper end in the drawing, The portion is pivotally supported by a shaft 121 common to the first gear 107. The second gear 108 is rotatably supported at a substantially intermediate position between the cam portion 120 and the shaft 121. Then, the second gear 108 is appropriately meshed with the third gear 109 or the fourth gear 110 by the rotation of the switching plate 116, and the driving force of the first motor 74 is transmitted to the pickup driving mechanism 61 or the conveying roller mechanism 12. Like to do.

  The first gear 107 is pivotally supported on the back side of the floating chassis 60, and the first-stage large gear is used as a helical gear, and this helical gear is engaged with the worm gear 106. The second small gear of the first gear 107 is always meshed with the large gear of the second gear 108. The fourth gear 110 is pivotally supported on the back side of the floating chassis 60, and the middle gear meshes with the first worm 111 of the fifth gear 113.

  The fifth gear 113 is supported by the third support member 104 on the first worm 111 side and rotatably supported by the fourth support member 105 on the second worm 112 side. The third support member 104 and the fourth support member 105 are attached to the back side of the floating chassis 60. The second worm 112 of the fifth gear 113 meshes with the small gear of the sixth gear 114 that is rotatably attached to the fourth support member 105. This small gear is a helical gear. The large gear of the sixth gear 114 is meshed with a seventh gear 115 that is also rotatably attached to the fourth support member 105. The large gear of the third gear 109 is always meshed with the small gear 76 that is a part of the pickup drive mechanism.

  As shown in FIG. 7, when the small gear of the second gear 108 is engaged with the large gear of the fourth gear 110, the driving force of the first motor 74 is transmitted to the transport roller mechanism 12, and the switching plate 116 is When the large gear of the second gear 108 meshes with the small gear of the third gear 109 by rotating counterclockwise, the driving force of the first motor 74 is transmitted to the pickup driving mechanism 61.

  As shown in FIGS. 8 and 9, the clamp mechanism 6 attaches a clamper 122, a thin plate support plate 123 that rotatably supports the clamper 122, and the support plate 123 to attach the clamper 122 to the turn. The clamper support 124 is configured to be separated from and in contact with the table 13.

  As shown in FIG. 9, the clamper 122 has a shaft portion 125 on the upper side in the drawing and a substantially frustoconical protrusion 126 that fits in the center hole of the disk on the lower side in the drawing. A disk centering taper 127 is provided on the outer peripheral edge.

  The clamper 122 rotatably supports the shaft portion 125 on one end side of the support plate 123, and the support plate 123 is fixed to the clamper support 124 on the other end side, and the disc is formed by the turntable 13 and the clamper 122. When clamping the disc, the shaft end of the clamper 122 is elastically pressed by a part of the support plate 123 to apply a disc clamping pressure between the turntable 13 and the clamper 122.

  As shown in FIG. 8, the clamper support 124 is made of a sheet metal elongated in the left-right direction, and has side plates 129, 130 bent downward at the left and right ends of the flat plate 128. The flat plate 128 is provided with a pair of rhombus holes 131 and 132 which are substantially rhombic first and second upper engaging portions, and the straight holes 133 are respectively formed in the rhombus holes 131 and 132 at the left and right corners in the drawing. , 134 are formed. A rear edge 135 of the clamper support 124 in the drawing is formed so as to be slightly inclined toward the back from the center to the left and right. Further, an engagement pin 136 is attached to the front end portion of the right side plate 130 in the figure, and this engagement pin 136 is fitted in the cam groove 89 (see FIG. 6) of the slide plate 84.

  As shown in FIG. 9, the left side plate 129 partially extends downward, and the lower end of the extension is formed in a bifurcated shape. Is a second piece 138. In addition, left and right side plates 129 and 130 (only the left side plate 129 is shown) are provided with shaft holes 139, and each shaft hole 139 is provided in the left and right side plates 66 and 67 (see FIG. 5) of the floating chassis 60, respectively. The clamper support 124 engages with the projected portions (not shown), and is rotatable about the projected portions.

  The center axis of rotation of the clamper support 124 with respect to the floating chassis 60 (the line connecting the centers of both shaft holes 139) is located at the back side by a distance K from the center axis of the turntable 13, and the distance K is It is larger than the center hole diameter (15 mm) of the disk D and within twice (30 mm), for example, about 25 mm. Further, the inner edge 135 of the clamper support 124 is slightly inclined toward the inner side from the center to the left and right.

  As shown in FIGS. 4 and 10, the transport roller mechanism 12 includes a transport roller 141 and a roller bracket 142.

  The transport roller 141 is configured by inserting a metal shaft 144 through a pair of synthetic rubber tapered cylinders 143 that gradually become smaller in diameter from the outer end to the inner end. Both ends of the shaft 144 protrude from the outer end of the tapered cylindrical body 143. One end of the protruding shaft 144 is provided with a roller gear 145 which is a part of the driving force transmitting means 83 (see FIG. 5) and the other end. Are fitted with collars 146, respectively.

  The roller bracket 142 is made of a metal plate. The roller bracket 142 has left and right side plates 148 bent upward at the left and right ends of a connecting plate 147 that is long to the left and right. It is extended to. The left right plate 148 has convex cylindrical portions 149 formed by drawing at substantially intermediate portions on the inner surface sides, and the convex cylindrical portions 149 are formed on the left and right side plates 24 and 25 of the lower frame 10 (see FIG. 2). It is fitted in a groove 150 (only one is indicated by an imaginary line) and mounted so as to be rotatable up and down with the convex cylindrical portions 149 and 149 serving as fulcrums. Further, both ends of the shaft 144 of the conveying roller 141 are rotatably supported by the extending portion between the left and right side plates 148.

  The rear edge of the connecting plate 147 is a mountain-folded edge 151 that is bent toward the back surface side. The mountain-folded edge portion 151 has a V-shaped concave shape that is substantially bilaterally symmetric on the plan view, but the inclination angle is a slight one of about 1 ° with respect to the axial center line of the roller. Further, a pair of left and right bent portions 152 bent upward are provided at the front edge of the connecting plate 147. These bent portions 152 are located at the upper position when the transport roller 141 is in the lower position, that is, when the disk is inserted into the reproduction position, and block the disk insertion slot 2 (see FIG. 1). Prevent double insertion. Further, as shown in FIG. 10, a bent piece 153 bent at a substantially right angle toward the outside is provided at the innermost part of the right side plate 148 of the roller bracket 142. The roller bracket 142 is always urged by a spring (not shown) in the direction in which the conveying roller 141 is raised.

Next, the operation of the mechanism unit 1 of the disc player will be described.
First, the disk transport state of the mechanism unit 1 of the disk player will be described.
When the disk is not inserted, the floating chassis 60 is fixed to the fixed chassis 15. The fixed state indicates a state in which the floating chassis 60 or a component attached to the floating chassis is fitted to the fixed chassis 15. The transport roller 141 is located at the disk transport position.

Specifically, as shown in FIG. 2, a pair of extending pieces 30 provided on the upper frame 7 which is a part of the fixed chassis 15 are paired with a pair of clamper support members 124 attached to the floating chassis 60. The diamond holes 131 and 132 are fitted. As shown in FIG. 11, the pair of extending pieces 30 are inserted into the straight portions 133 and 134, thereby moving in the disk insertion direction and the direction perpendicular to the disk insertion direction (vertical direction and horizontal direction in the figure). Is regulated.
Further, as shown in FIG. 12, the slide plate 84 is positioned in the disc ejection direction (left side in the figure), and the pair of bent portions 57 are respectively in the corresponding slit portions 90 and 91, and the floating chassis with respect to the fixed chassis 15. The movement of 60 in the vertical direction (the thickness direction of the regenerator) is restricted.

  Further, as shown in FIG. 13, a hole 56 of a cut and bent portion 55 (see FIGS. 2 and 4) provided in the left side plate 24 of the lower frame 10 which is a part of the fixed chassis 15 is formed in the floating chassis 60. A first piece 137 of the attached clamper support 124 is inserted. Thereby, the direction (vertical direction in the figure) perpendicular to the disk insertion direction is fixed. Further, as shown in FIG. 6, a pair of bent portions 57 (see FIG. 4) provided in the lower frame 10 are inserted into the slit portions 90, 91 of the slide plate 84, thereby causing the disc to be inserted in the disc insertion direction. The direction (vertical direction in the figure) intersecting vertically is fixed.

The disc is inserted in such a state that the floating chassis 60 is fixed.
FIG. 14 shows a state in which the disc D is inserted between the detection portions 40 and 41 of the disc detection members 35 and 36 through the disc insertion opening 2 and the outer peripheral surface of the disc is in contact with both detection portions 40 and 41. From this state, when the disk D is inserted with its outer peripheral surface being pushed between the detection units 40 and 41, the disk detection members 35 and 36 rotate. Then, a switch (not shown) is turned on to detect that a disk has been inserted, and the first motor 74 (see FIG. 7) is activated.

  When the first motor 74 is activated, the slide plate 84 moves to the right in the drawing as shown in FIG. As the slide plate 84 moves, the transport roller 141 moves to the disk transport position and is driven to rotate by the first motor 74 to transport the disk D. As a result, the disk D passes through the inner edge 135 of the clamper support 124 as indicated by the phantom line in FIG. Then, the disk D is transported to the far back side from the predetermined reproduction position. (Not shown)

  As the slide plate 84 moves, the engagement pin 136 of the clamper support 124 moves down along the cam groove 89 as shown in FIG. In this process, as shown in FIG. 9, the clamper support 124 rotates about the shaft 139 in the clockwise direction in the drawing, and the clamper 122 is lowered from the position indicated by the phantom line to the position indicated by the solid line. At this time, as shown in FIG. 16, the disk frusto-conical protrusion 126 of the substantially frustoconical protrusion 126 is brought into sliding contact with the upper edge of the center hole of the disk D to center the disk D while the disk is centered. Fit into the center hole. At the same time, the floating chassis 60 is fixed to the fixed chassis 15 by the movement of the slide plate 84 as shown in FIG.

  At the time of this fitting, the distance between the center axis of the turntable 13 (see FIG. 9) and the rotation center axis of the clamper support 124 is greatly shortened, so that the rotation angle of the clamper support 124 is The clamper 122 also comes in contact with the turntable 13 while being largely rotated. When the taper 127 of the substantially frustoconical protrusion 126 on the clamper 122 side starts to slidably contact the edge of the disk center hole, the angle of the taper 127 with respect to the disk D center hole edge is equal to the inclination of the clamper 122 with respect to the disk. Only has become loose.

  Then, the disc D is sandwiched between the clamper 122 and the turntable 13, and the disc D is positioned at the disc reproduction position, and the disc reproduction preparation is completed.

  According to the above configuration, the clamper support 124 has a particularly small dimension in the disk insertion direction and becomes an elongated part in the left-right direction, and can be significantly smaller than the conventional clamper support. Further, since both ends in the longitudinal direction of the clamper support 124 are attached between the left and right side plates 66 and 67 of the floating chassis 60, the clamper support 124 that is long in the disk insertion direction is attached only on the back side as in the prior art. The attachment strength of the support 124 can also be increased.

  Furthermore, since the distance between the center axis of the turntable 13 and the rotation center axis of the clamper support 124 is greatly shortened, if the distance between the clamper 122 and the turntable 13 is constant, the clamper support 124 The rotation angle becomes large, and the clamper 122 comes in contact with the turntable 13 while largely rotating. When the taper 127 of the substantially frustoconical protrusion 126 on the side of the clamper 122 starts to slide in contact with the edge of the disk center hole, the angle of the taper 127 with respect to the edge of the disk center hole is moderate by the inclination with respect to the disk. become.

In general, when the angle of the taper with respect to the edge of the center hole of the disk becomes gentle, the smoothness of centering becomes disadvantageous, but the amount of disk eccentricity that can be centered increases. Therefore, in the present invention, since the rotation angle of the clamper 122 with respect to the turntable 131 is increased, the taper 127 is decreased to maintain the smoothness of centering, and at the same time, the centering can be performed while suppressing the height of the clamper 122. Therefore, it is possible to maintain a large amount of disk eccentricity, and to achieve both smoothing of the centering and downsizing.

  Further, the inner edge 135 of the clamper support 124 is inclined to the inner side from the center to the left and right so that the disc is transported through the inner edge 135 of the clamper support 124. As a result, contact with the upper surface of the disk can be avoided, and even when the disk contacts the rear edge 135, it can be stopped only at the contact with the disk edge.

The perspective view which shows a disc player. FIG. The top view which shows an upper unit. The top view which shows the state which removed the pick-up unit and the clamp mechanism from the lower unit. The top view which shows a pick-up unit. The side view which shows the relationship between a slide plate and peripheral components. The top view which shows a driving force transmission means. The top view which shows a clamp mechanism. The left view which shows clamp operation | movement. The perspective view which shows a conveyance roller mechanism. The top view which shows the relationship between the rhombus of a clamper support body and the extension piece of a fixed chassis. The side view which shows the relationship between the slide board and clamper in the disc non-insertion state. The front view which shows the relationship between the 1st piece of a clamper support body, and the to-be-engaged part hole of a fixed chassis. The top view which shows the use condition of a disc player. The side view which shows the relationship between the slide board and clamper in a disc insertion state. The side view which shows the relationship between the taper surface for disk centering, and a disk.

Explanation of symbols

13 Turntable 60 Floating chassis 66 Left side plate 67 Right side plate 122 Clamper 124 Clamper support 135 Back side edge K Distance from the center axis of the turntable to the rotation center axis of the clamper support

Claims (2)

A clamper support (124) supporting the clamper (122) is rotatably mounted on the chassis (60) supporting the turntable (13), and the clamper is moved closer to the turntable by the rotation of the clamper support. In the disc player, the substantially frustoconical protrusion of the clamper is fitted into the center hole of the disc, and a disc clamping pressure is applied between the turntable and the clamper by a spring.
The center axis of rotation of the clamper support with respect to the chassis is set between the left and right side plates (66, 67) of the chassis at a position deeper than the center axis of the turntable, and the rotation from the center axis of the turntable is performed. A disc player, characterized in that the distance (K) to the central axis is set larger than the central hole diameter of the disc and within twice that.   The back side edge (135) of the clamper support is inclined to the back side from the center to the left and right, and the inserted disc is loaded through the back side edge. The disc player according to claim 1.