JP4960323B2 - Disc playback device. - Google Patents

Description

  The present invention relates to a disk reproducing apparatus capable of fixing a floating chassis to a fixed chassis in a stable state with a simple configuration.

  Mainly, in an in-vehicle disk reproducing apparatus, a pickup, a turntable, a clamper, and the like are mounted on a floating chassis in a fixed chassis so as not to be affected by external vibration. When the disk is inserted, the floating chassis is fixed to the fixed chassis so that the disk can be inserted and removed easily.

Japanese Unexamined Patent Application Publication No. 2002-298482 discloses the following disk loading device.
That is, a pick base (floating chassis) (18) to which a pickup or the like is attached is supported in a floating state in the chassis (fixed chassis) (11). A chuck arm (clamper support) (41) for supporting the clamper (42) and an upper lever (55) for supporting the loading roller (52) are attached to the pick base (18).

  When the disc is inserted, the contact portion (45) provided on the chuck arm (41) is brought into contact with the top plate (12) of the chassis (11) from below and the guide pin provided on the upper lever (55). The pick base (18) is fixed to the chassis (11) by engaging (60) with the lock groove (66) of the engaging portion (64) provided on the front plate (15) of the chassis (11). Like to do.

Japanese Patent Application Laid-Open No. 2004-127334 discloses the following disk device.
That is, the upper base (8) and the lower base 7 constitute a fixed chassis, and a plurality of support pieces (9a, 9b, 9c, 9d, 9e, 9f, 9g) are provided on the back side of the upper base (8). The mechanism unit (floating chassis) (2) is formed in a floating state between the upper base (8) and the lower base (7).
Arm portions (30, 31) are integrally formed on the left and right sides of the clamp chassis (clamper support) (6). Posture setting members (14, 15) are connected to the left and right of the arm portions (30, 31).

When the disc is inserted, the rear end (6c) of the clamp chassis (6) contacts the inner surface of the upper base (8), and between the support piece (9c) and the support piece (9d) and the It is sandwiched between the support piece (9f, 9e) and the support piece (9g).
Further, the upper contact piece (14a) of the posture setting member (14) contacts and presses the upper base (8) and the lower contact piece (14b) contacts the bottom plate (7a) of the lower base (7). Thereby, the mechanism unit (2) is fixed to the fixed chassis.
JP 2002-298482 A JP 2004-127334 A

In the disk loading device disclosed in Patent Document 1, the chuck arm (41) that supports the clamper (42) is provided with contact portions (45, 45) that contact the top plate (12) of the chassis (11), These contact portions (45, 45) are part of the fixing means of the pick base (18).
In general, when the floating chassis is fixed to the fixed chassis, it can be more stably fixed at the peripheral portion than at the center where the clamper is provided.
However, in the configuration of Patent Document 1, the pick base (18) cannot be fixed at the surrounding portion, and the pick base (18) is fixed only near the center where the clamper is provided. There was a problem that could not be fixed.

  In the disk device disclosed in Patent Document 2, a relatively large left and right posture setting member (14, 15) is used as a dedicated component for fixing the mechanism unit (2) to the fixed chassis, so that the large size is obtained. There is a problem that the number of parts increases and the configuration becomes complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a disk reproducing apparatus that can fix a floating chassis to a fixed chassis in a stable state with a simple configuration.

  In a disk player that fixes the floating chassis to the fixed chassis when the clamper support that is pivotally attached to the floating chassis is separated from the turntable, the left and right ends of the clamper support are rotated to the left and right side plates of the floating chassis, respectively. Mount freely. The clamper support is extended downward from one of the left and right ends, and an engaging portion is provided in the extended portion. The fixed chassis is provided with an engaged portion, and the engaging portion and the engaged portion constitute a part of fixing means for fixing the floating chassis to the fixed chassis.

  One of the engaging portion and the engaged portion may be a chevron and the other may be a hole.

  It is preferable that the angle protrusion protrudes from the upper edge and the lower edge of the hole by substantially the same amount at a position where the angle protrusion protrudes from the hole by the maximum amount.

  Of the left and right side plates of the floating chassis, a slide plate is attached to the side plate opposite to the side where the engaging portion is located, and the slide plate is reciprocated to the near side and the far side by the first motor, The clamper support is rotated in conjunction with a slide plate, the slide plate is provided with front and rear engaging portions, and the fixed chassis has a front and a rear when the clamper separates from the turntable. Front and rear engaged portions for engaging the engaging portions respectively are provided on the front side and the rear side from the engaged portions, respectively, and the front engaging portion, the front engaged portion, the rear engaging portion, It is preferable that the rear engaged portion constitutes a part of the fixing means together with the engaging portion and the engaged portion.

  The clamper support is provided with first and second upper engaging portions at two left and right positions spaced from the rotation axis. The fixed chassis is provided with first and second upper engaged portions that engage the first and second upper engaging portions when the clamper is separated from the turntable, respectively. The first upper engaged portion, the second upper engaged portion, and the second upper engaged portion may form part of the fixing means together with the engaging portion and the engaged portion.

  The first and second upper engaging portions may be holes, and the first and second upper engaged portions may be protrusions.

  Of the left and right side plates of the floating chassis, the slide plate is attached to the side plate opposite to the side on which the engaging portion is provided. The slide plate is reciprocated toward the front side and the back side, and the clamper support is rotated in conjunction with the slide plate. The slide plate is provided with a front engagement portion and a rear engagement portion on the front side and the rear side from the engagement portion, respectively. And the front engaging part and the front engaged part, the rear engaging part and the rear engaged part, the engaging part and the engaged part, the first upper engaging part and the first upper part The fixing means may be configured by the engaged portion, the second upper engaging portion, and the second upper engaged portion.

  Below the floating chassis, a part of the side plate of the fixed chassis is bent by a substantially horizontal bending curve to form an upper folding piece and a lower folding piece, and the engaged portion is constituted by both folding pieces. And it is good to make the said engaging part into a mountain-shaped protrusion, and to contact | abut this mountain-shaped protrusion on the lower surface of an upper bending piece, and the upper surface of a lower bending piece.

  The lower bent piece may be made elastic, and the mountain-shaped protrusion may be elastically pressed against the lower surface of the upper bent piece by contact between the lower bent piece and the mountain-shaped protrusion.

  The lower bent piece may extend from a portion continuous with the side plate of the fixed chassis through a folding line so as to be substantially parallel to the side plate, and the mountain-shaped protrusion may be engaged from the extended end side.

  According to the disk reproducing apparatus of the present invention, the left and right ends of the clamper support are rotatably attached to the left and right side plates of the floating chassis, respectively, and the clamper support is extended downward from one of the left and right ends. An engagement portion is provided in the extension portion, and an engagement portion is provided in the fixed chassis so that the engagement portion is engaged with the engagement portion when the clamper is separated from the turntable. By making the part and the engaged part a part of the fixing means, the fixing means can have a simple configuration. In addition, the engaging portion and the engaged portion can fix the floating chassis to the fixed chassis at the peripheral portion, and the engaging portion and the engaged portion are substantially in the disk insertion direction. The floating chassis can be stably fixed to the fixed chassis.

  Further, by using one of the engaging portion and the engaged portion as a mountain-shaped protrusion and the other as a hole, the engaging portion and the engaged portion can be configured simply.

  Further, at the position where the chevron protrudes from the hole and is separated by the maximum amount, the chevron protrudes from the upper edge and the lower edge of the hole by approximately the same amount. Can be separated most efficiently. Therefore, the vibration allowance can be easily increased.

  In addition, a triangle formed by connecting the engaged portion provided on one of the left and right side plates of the floating chassis and the front and rear engaged portions provided on the other side with a straight line is an acute-angled triangle on both sides. The floating chassis can be fixed in a stable state.

  Further, the first and second upper engaging portions provided on the clamper support and the first and second upper engaged portions provided on the fixed chassis constitute a part of the fixing means, whereby the floating chassis is It can be more securely fixed to the fixed chassis.

  Further, when the first and second upper engaging portions on the clamper support side are protrusions and the first and second upper engaged portions on the fixed chassis side are holes, the engaging portions are fitted to the engaged portions. At this time, the protrusion protrudes to the upper surface side of the fixed chassis, but the protrusion does not protrude to the upper surface side of the fixed chassis by reversing the protrusion and the hole, and the disk reproducing apparatus is enlarged. There is no.

  The fixing means is composed of the engaging portion on the clamper support side, the first and second upper engaging portions, the front and rear engaging portions on the slide plate side, and the engaged portions corresponding to these. Thus, the floating chassis can be securely fixed to the fixed chassis in a more stable state.

Below the floating chassis, a part of the side plate of the fixed chassis is bent by a substantially horizontal bending curve to form an upper folding piece and a lower folding piece, and the engaged portion is constituted by both folding pieces. When the engaging portion is a chevron and the chevron is in contact with the lower surface of the upper folded piece and the upper surface of the lower folded piece, the upper folded piece and the lower folded piece are fixed chassis. Since a part of the side plate is bent, the number of parts does not increase.
In addition, if a part of the side plate of the fixed chassis is bent by a vertical folding line, and a hole is provided in the bent part, and the engaging part is brought into contact with the upper and lower edges of the hole, there is a problem of strength. Since it is necessary to secure a height dimension at least twice as large as the plate thickness above and below the hole, it is difficult to ensure sufficient vibration margin between the cut and bent part and the floating chassis above it. However, the upper folded piece is formed by bending a part of the side plate of the fixed chassis along a horizontal folding line, and by causing the angled protrusion to contact the lower surface of the upper folded piece. A sufficient amount of vibration margin can be ensured between the upper surface of the bent piece and the floating chassis.

  When the lower bent piece is made elastic, and the lower bent piece and the mountain-shaped protrusion are brought into contact with each other, the mountain-shaped protrusion is elastically pressed against the lower surface of the upper bent piece. It can be fixed in a more stable state. Further, when the mountain-shaped protrusion is elastically pressed against the upper bent piece in this way, rattle noise due to vibration can be suppressed.

  If the lower bent piece extends from the portion connected to the side plate of the fixed chassis through the bent line substantially in parallel with the side plate, the lower bent piece can have elasticity, and the extension The shape on the end side can be made a shape that facilitates the intrusion of the mountain-shaped protrusion.

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 the cam groove 89, a pair of through-holes 94, 95 comprising slit portions 90, 91 having a narrow vertical width, which are front and rear engaged portions, and clearance portions 92, 93 having a wide vertical direction. 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 120 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 disk, the shaft end of the clamper 122 is elastically pressed by a part of the support plate 123 to apply a disk 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 projecting 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 disc playback apparatus will be described.
FIG. 12 is a diagram showing the relationship between the slide plate 84 and the clamper 122 when the disc is being played back, and the disc D is sandwiched between the turntable 13 and the clamper 122. In this state, the pair of bent portions 57 provided in the lower frame 10 are located in the escape portions 92 and 93 of the through holes 94 and 95 of the slide plate 84, and the floating chassis 60 is floating with respect to the fixed chassis 15. It is in a state. The first piece 137 of the clamper support 124 is located at a position farthest from the hole 56 of the lower frame 10, and its apex is substantially opposed to the center of the hole 56, so that the upper edge of the hole 56 is also lower than the lower edge. Are separated by almost the same amount. (Figure 9 solid line position)

  When the reproducing operation is stopped from this state and the disc ejection operation is performed, the loading mechanism 62 (see FIG. 5) provided in the floating chassis 60 is activated, and the slide plate 84 is moved to the first motor 74 (see FIG. 13). 5) to move in the disk insertion direction (left side in the figure). As a result, the pair of bent portions 57 move to the right in the drawing relative to the slide plate 84 and enter the corresponding slit portions 90 and 91, respectively. Regulates movement in the direction (thickness direction of the player).

  On the other hand, as shown in FIG. 6, the clamper support 124 has its engaging pin 136 inserted into the cam groove 89 of the slide plate 84, so that when the slide plate 84 moves to the left in the figure, the engagement pin 136 becomes virtual. As shown in FIG. 13, the clamper support 124 rotates upward about the axial center line connecting the centers of the shaft holes 139 and 139, and the clamper 122 is moved from the disk D as shown in FIG. Get away. At this time, as shown in FIG. 9, the second piece 138 provided on the left side plate 129 is in sliding contact with the pushing portion 54 to determine the position of the first piece 137 with respect to the hole 56 of the lower frame 10. Is directed toward the hole 56.

  Further, when the clamper support 124 rotates upward, as shown in FIG. 14, the rhombus holes 131 and 132 of the clamper support 124 are provided with a pair of extended pieces 30 provided in the upper frame 7 (see FIG. 2). 30, and at the same time, the first piece 137 is fitted into the hole 56 as indicated by the phantom line in FIG. 9.

  That is, when the disc is ejected, the vertical movement of the floating chassis 60 is restricted by the engagement between the slit portions 90 and 91 of the slide plate 84 and the bent portion 57. By fitting with the extension pieces 30, 30, the movement of the floating chassis 60 in the disk insertion direction and the left-right direction is restricted, and the movement of the floating chassis 60 in the up-down direction is also achieved by fitting the first piece 137 with the hole 56. The floating chassis 60 is regulated and fixed to the fixed chassis 15.

  As described above, the left and right ends of the clamper support 124 are pivotally attached to the left and right side plates 129 and 130 of the floating chassis 60, respectively, and the clamper support 124 is extended downward from the left side plate 129, A first piece 137 is provided in the extension, and a substantially D-shaped hole 56 is provided in the fixed chassis 15 so that the first piece 137 is engaged with the hole 56 when the clamper 122 is separated from the turntable 13. Since the first piece 137 and the hole 56 constitute a part of the fixing means, the fixing means can have a simple configuration. Further, since the first piece 137 and the hole 56 are on the left side of the floating chassis 60 and are substantially in the center in the disk insertion direction, the floating chassis 60 is stably attached to the fixed chassis 15. Can be fixed.

  In addition, since the first piece 137 is engaged with the hole 56 as a mountain-shaped protrusion, the configuration of the engagement portion and the engaged portion can be further simplified.

  Further, at the position where the first piece 137 is separated from the hole 56 by the maximum amount, the peak of the first protrusion 137 of the first piece 137 and the center of the hole 56 are substantially opposed to each other so that the first piece 137 is formed in the hole 56. The first piece 137 can be separated from the fixed chassis 15 most efficiently by separating from the upper edge and the lower edge by substantially the same amount. Therefore, the vibration margin of the floating chassis 60 can be easily increased.

  A hole 56 for engaging the first piece 137 is provided in the left side portion of the floating chassis 60 so that the floating chassis 60 is fixed at a substantially central portion in the disk insertion direction. The front and rear bent portions 57 for engaging the front and rear engaging portions 90 and 91 are provided on the front side and the rear side from the hole 56, and the triangle formed by connecting these three points with a straight line is the slide plate 84 side. Since the front and rear are formed into acute-angled triangles, the floating chassis 60 can be stably fixed to the fixed chassis.

  Further, the clamper support 124 is provided with rhombus holes 131 and 132 at two positions on the left and right sides away from the rotation axis thereof, and the fixed piece 15 is extended with the extended pieces 30 engaged with the rhombus holes 131 and 132, respectively. 30 and the rhombus holes 131 and 132 and the extended pieces 30 and 30 restrict the movement of the floating chassis 60 in the disk insertion direction and the left-right direction, so that the floating chassis 60 is fixed to the fixed chassis 15. Can be fixed more reliably.

  Further, the engaging portions provided on the clamper support 124 side are the rhombus holes 131 and 132, and the engaged portions provided on the fixed chassis 15 side are the extending pieces 30 and 30 extending downward, Even when the clamper support 124 is rotated upward and the rhombus holes 131 and 132 and the extended pieces 30 and 30 are engaged with each other, there is nothing protruding above the upper surface of the fixed chassis 15, and the disk reproducing apparatus is enlarged. Can be avoided.

  The first piece 137 on the clamper support 124 side, the rhombus holes 131 and 132, and the slit portions 90 and 91 on the slide plate 84 side, the corresponding holes 56, the extended pieces 30 and 30, the front, the bent portion 57, By configuring the fixing means with 57, the floating chassis 60 can be securely fixed to the fixed chassis 15 in a more stable state.

  The first and second upper engaging portions in FIG. 8 are not limited to a substantially diamond shape. For example, as shown in FIG. 15, the first and second upper engaging portions 201, 201 may be engaged with a pair of extending pieces 202, 202 that are first and second upper engaged pieces, Engaging portions 203 and 203 are provided on the lower side in the drawing, and the first and second upper engaging portions may be set so that the extending pieces 202 and 202 can be engaged with the engaging portions 203 and 203.

  Further, the method for restricting the vertical movement of the floating chassis 60 is not limited to fitting the first piece 137 in FIG. For example, as shown in FIG. 16, instead of the first piece 137 that is the engaging portion in FIG. 9, the angle protrusions 204 and 204 are formed, and the hole 56 that is the engaged portion in FIG. Then, a part of the left side plate 24 of the lower frame 10 is bent by a substantially horizontal folding line to form an upper bent piece 205 and a lower bent piece 206, and the engaged portion is constituted by both bent pieces. Also good.

  In particular, as shown in FIG. 17, the lower bent piece 206 extends substantially parallel to the side plate 24 from a portion continuous with the side plate 24 via a folding line, and engages the mountain-shaped protrusion 204 from the extended end side. Shall be allowed to. The extended end is bent slightly downward so that the mountain-shaped protrusion 204 can be easily drawn.

  As shown in FIG. 18, when the upper bent piece 205 is formed by bending a part of the left side plate 24 of the lower frame 10 inwardly by a substantially horizontal folding line, the upper end of the mountain-shaped protrusion 204 and the flat plate portion of the floating chassis 60 are formed. Even if the distance L from the lower surface of 65 is constant, the vertical dimension of the upper bent piece 205 contacting the upper end of the mountain-shaped protrusion 204 is sufficient for the plate thickness. The space between the flat surface portion 65 and the upper bent piece 205 can be sufficiently secured between the flat plate portion 65 and the upper bent piece 205 without changing the thickness of the apparatus. can do.

  Further, as shown in FIG. 17, the lower bent piece 206 is made elastic, and the mountain-shaped protrusion 204 is elastically pressed against the lower surface of the upper bent piece 205 by the contact of the lower bent piece 206 and the mountain-shaped protrusion 204. The floating chassis 60 can be fixed to the lower frame 10 in a more stable state. In addition, when the mountain-shaped protrusion 204 is elastically pressed against the upper bent piece 205 in this way, rattle noise due to vibration can be suppressed.

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 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 side view which shows the relationship between the slide board and clamper in a disc reproduction | regeneration state. The side view which shows the relationship between the slide board and clamper in a disc discharge state. The top view which shows the relationship between the rhombus of a clamper support body and the extension piece of a fixed chassis. The top view which shows a clamp mechanism. The left view which shows clamp operation | movement. The perspective view which shows a part of left side board of a lower frame. The front view which shows clamp operation | movement.

Explanation of symbols

10 Lower frame 13 Turntable 14 Pickup 15 Fixed chassis 30 First upper engaged portion, second upper engaged portion 56 Engaged portion 57 Front engaged portion, Rear engaged portion 60 Floating chassis 66 Left side plate 67 right side plate 74 first motor 84 slide plate 90 front engagement portion 91 rear engagement portion 102 second motor 122 clamper 124 clamper support 129 left side plate 130 right side plate 131 first upper engagement portion 132 second upper engagement portion 137 engaging part 201 first upper engaging part, second upper engaging part 202 first upper engaged part, second upper engaged part 203 engaging part 204 mountain-shaped protrusion 205 upper bent piece 206 lower folded Piece of music

Claims (5)

A floating chassis (60) equipped with a pickup (14), a first motor (74) for driving the pickup, a turntable (13), and a second motor (102) for driving the turntable is mounted in a fixed chassis (15). A clamper support (124) supporting the clamper (122) is rotatably attached to the floating chassis, and the clamper support is rotated by the first motor to remove the clamper from the turntable. In a disc reproducing apparatus provided with a fixing means for fixing the floating chassis to the fixed chassis when separated.
The left and right ends (129, 130) of the clamper support are pivotally attached to the left and right side plates (66, 67) of the floating chassis, respectively, and the clamper support is extended downward from one of the left and right ends. The extending portion is provided with engaging portions (137, 204, 205), the fixed chassis is provided with engaged portions (56, 206, 207) ,
The engaging portion is a mountain-shaped protrusion (204, 204),
A part of the side plate of the fixed chassis is bent by a substantially horizontal folding line below the floating chassis to form an upper bent piece (205) and a lower bent piece (206). Composed of both folded pieces,
The lower bent piece has elasticity by extending substantially parallel to the side plate from a portion connected to the side plate of the fixed chassis via the folding line,
When the clamper moves away from the turntable,
By causing the angled protrusion to abut from the extended end side of the upper surface of the lower bent piece, the angled protrusion is elastically pressed against the lower surface of the upper bent piece, and the engaging part is engaged with the engaged part. A disc reproducing apparatus characterized in that the engaging portion and the engaged portion constitute a part of the fixing means.   A slide plate (84) is attached to the side plate opposite to the side where the engaging portion is located, of the left and right side plates of the floating chassis, and the slide plate is reciprocated back and forth by the first motor. The clamper support is rotated in conjunction with the slide plate, the slide plate is provided with front and rear engaging portions (90, 91), and the clamper is turned on the fixed chassis. Front and rear engaged portions (57, 57) for engaging the front and rear engaging portions respectively when separated from the table are provided on the front side and the rear side of the engaged portions, respectively. The front engaged portion, the rear engaging portion, and the rear engaged portion together with the engaging portion and the engaged portion constitute a part of the fixing means. The disc reproducing apparatus described.   The clamper support is provided with first and second upper engaging portions (131, 132, 201, 201) at two positions on the left and right sides spaced from the rotation axis of the clamper support, and the fixed chassis has First and second upper engaged portions (30, 30, 202, 202) are provided for engaging the first and second upper engaging portions when the clamper is separated from the turntable, respectively. The joining portion and the first upper engaged portion, and the second upper engaging portion and the second upper engaged portion constitute a part of the fixing means together with the engaging portion and the engaged portion. 2. The disc player according to claim 1, wherein   4. The disk according to claim 3, wherein the first and second upper engaged portions are protrusions, and the first and second upper engaging portions are holes for fitting the respective protrusions. Regenerator.   Of the left and right side plates of the floating chassis, a slide plate is attached to the side plate opposite to the side where the engaging portion is provided, and the slide plate is reciprocated to the near side and the far side by the first motor. The clamper support is rotated in conjunction with the slide plate. The slide plate is provided with front and rear engagement portions on the front side and the rear side of the engagement portion, respectively, and the fixed chassis. Are provided with front and rear engaged portions that respectively engage the front and rear engaging portions when the clamper separates from the turntable, and the front engaging portion and the front engaged portion, and the rear engaging portion. And the rear engaged portion, the engaging portion and the engaged portion, the first upper engaging portion and the first upper engaged portion, the second upper engaging portion and the second upper engaged portion. The fixing means is constituted by a portion. Disk reproducing apparatus according to.