JPH01124145A - Information recording disk player - Google Patents

Abstract

PURPOSE:To facilitate miniaturization by providing a cam member having a spiral cam part provided rotatably freely in the periphery of a rotational center almost perpendicular to the disk supporting plane of a turntable and formed in the periphery of a rotational center axis and connected slidably with the dynamic point part of the member. CONSTITUTION:A driving means to move a supporting member 45 is constituted of a lever member 47 engaged with the supporting member at a point of application part, the cam member 51 having the spiral cam part 51a provided on the periphery of the rotational center shaft 50 almost perpendicular to the disk supporting plane of the turntable 40 rotatably freely and is formed in the periphery of the rotational center shaft and is abutted slidably with the dynamic point part 47a of the member 47, and a torque attaching means to attach torque on the cam member 51. In such a way, since the title device is constituted so that the supporting member 45 which supports the pressing member 44 rotatably freely can be moved by the rotation of such a small spiral cam member, it is possible to miniaturize the device as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an information recording disc playing device, and more particularly to a disc clamping mechanism.

BACKGROUND ART FIG. 13 shows a disc clamp mechanism and a turntable, which are the main parts of a conventional information recording disc playing device. As shown in the figure, vertical portions 101a extending upward at both left and right ends,
A chassis 101 having a diameter 101b is provided, and a turntable 102 is attached to the chassis. An information recording disk 103 is placed on a disk carrier 102a of the turntable 102. Note that the direction of the arrow Y indicates the front of the information recording disk performance device, and the direction of the arrow X indicates the left. Further, arrow Z indicates upward.

A support member 104 is provided above the chassis 101 and extends in the left-right direction. Further, a pair of cam members 105 and 106 extending in the front-rear direction (in the direction of arrow Y and the opposite direction) are provided on the outer surfaces of the left and right vertical surfaces 101a and 101b of the chassis 101 so as to be able to reciprocate in the front-rear direction. ing.

The support member 104 rotatably supports a disc-shaped pressing member 107 for pressing the information recording disc 103 toward the disc supporting surface 102a of the turntable 102. Two bottles 104a are provided protruding from both left and right end portions of the support member 104. Each of these bins 104
a is slidably fitted into a guide hole 101C that is formed in each of the vertical surfaces 101a and 101b of the chassis 101 and extends in the vertical direction (in the direction of arrow Z and the opposite direction thereof). 104 is guided in the vertical direction.

Each bottle 10 provided at both left and right ends of the support member 104
4a is further slidably engaged with cam holes 105a and 106a formed in each cam member 105 and 106.

Each of the cam holes 105a, 106a is formed as a whole so as to be inclined upwardly toward the front. That is, when each cam member 105, 106 moves back and forth, the support member 1
04 moves up and down, and the pressing member 107 presses the turntable 1.
The awn can be removed from the information recording disk 103 on the 02. In addition, each cam member 1
05 and 106 have rack parts 10 along their moving direction.
5b, 106b are formed, and a drive source (not shown) including a gear that meshes with each rack portion and reciprocates each cam member 105, 106 is provided.

In the information recording disk performance device described above, the cam members 105 and 106 for moving the support member 104 up and down together with the pressing member 107 are relatively large members in the form of a flat plate, and the cam members for reciprocating Since a large space is required, it has become difficult to downsize the information recording disk performance device as a whole.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its object is to provide an information recording disk performance device that can be easily miniaturized.

An information recording disc playing device according to the present invention includes a pressing member that presses an information recording disc toward a disc supporting surface of a turntable, and a pressing member that is movable in a plane substantially perpendicular to the disc supporting surface. The drive means includes a support member supporting the member, a drive means for moving the support member, and the drive means includes a lever member engaged with the support member at a point of action, and a lever member that is engaged with the support member at a point of action, and a lever member that is substantially disposed relative to the disc carrying surface of the turntable. A cam member that is rotatably provided around a right-angled center axis of rotation and has a spiral cam portion that is formed around the center axis of rotation and that slides into contact with a force point of the lever member; and a cam member that applies rotational force to the cam member. and rotational force applying means.

Embodiment Hereinafter, an information recording disk performance device as an embodiment of the present invention will be described with reference to the accompanying drawings. The information recording disc performance apparatus is an autoloading disc player that automatically transports the disc to a performance position and plays the disc. In FIG. 1, reference numeral 1 indicates the entire autoloading disc player.

As shown in FIG. 1, the front part of the player housing 2,
That is, the front panel 3 is provided with a rectangular opening 3a extending in the left-right direction so that the tray 5 can protrude to the outside of the player housing. However, the left and right direction referred to here refers to the front direction indicated by arrow Y, and the direction of arrow X is to the left. Also, arrow Z
indicates upward. A group of switches 7 are provided on the front panel 3 for operating the disc player.

The tray 5 is for carrying and transporting different optical information recording disks 8, 9 and 10 (hereinafter referred to as disks) of the BfiJi class, for example, and the disk holding surface of the tray has a Arc-shaped outer circumferential recesses 5a, 5b, and 5c capable of accommodating a disk are formed concentrically and each with a predetermined step.

As shown in FIG. 2, inside the player housing 2 is a rectangular parallelepiped-shaped chassis 12 whose front and top surfaces are open.
is fixedly installed on the chassis, and a pair of left and right guide rails 13 and 14 are provided on the chassis for slidingly contacting the tray 5 and guiding the tray.
are provided in parallel in the front-rear direction (arrow Y direction and the opposite direction). As a result, the tray 5 can protrude from the player housing 2 and can be stored in the player housing 2. Details of the tray 5 are shown in FIG. 3 (Ta and Yama), and FIG.
ω or C) shows details of the guide rail 14 on the right side. Note that the guide rail 13 on the left side is formed in substantially the same shape as the guide rail 14 on the right side, and details thereof are not shown. As is clear from FIG. 3), a pair of left and right sliding contact grooves 5d are formed in the tray 5, and a guide protrusion 14a formed on the guide rail over almost the entire length (see FIG. 4).
This sliding contact groove 5d is in smooth sliding contact with the parts shown in the figure.

As shown in FIG. 3, a pair of left and right rack portions 16.
7 is fixed. As shown in FIG.
A small chassis 18 is provided on the right front end of the small chassis 18, and a gear 19a that meshes with the right rack portion 17 of the pair of rack portions is provided on the small chassis 18. The gear 19a is a gear 19 provided concentrically with this gear 19a.
b, other gears 20 and 21, a worm wheel 22, a worm 23, and gears 24 and 25 in order to be connected to the output shaft of a motor 26. These gears 19a, 19b,
20, 21, worm wheel 22, worm 23, gears 24, 25, and motor 26, the above rack part 1
A driving force applying means for applying a driving force to 7 is configured. Further, by the driving force applying means and the rack section 17,
A driving means for reciprocating the tray 5 back and forth is configured.

As shown in FIGS. 2 and 3(a), the pair of rack portions 16 and 17 have a deepest portion 1 that protrudes further into the back of the player housing 2 from the end of the tray 5 in the storage direction.
6a and 17a. Note that this deepest part 16a
, 17a are also provided with sliding contact portions for sliding contact with the guide rails 13.14.

Figure 5 (The deepest part 1 of one side is shown in Figure 6)
7a is shown in detail. Note that the other deepest portion 16a is formed symmetrically with this deepest portion 17a, and details are not shown. As shown in FIGS. 2, 3 and 6, the tray 5
A pin 5f serving as a rotation support portion is provided to extend upwardly and protrude from the end in the storage direction, and the deepest portions 16a and 17a are bendably attached to this pin 5f. 3 and the bending position of the deepest portion 17a shown by a solid line in FIG. 6, that is, the deepest portion 17a is
The position where 7a is straight is called the first bending position. Furthermore, the bending position of the deepest portion 17a shown in FIG. 2 and the bending position of the deepest portion 17a shown by the two-dot chain line in FIG. The bending position taken by the deepest portion 17a is referred to as a second bending position.

The deepest portion 17a is located at the bending position indicated by the dashed line in FIG.
It is also possible to bend to a third bending position sandwiching the bending position. However, normally, a stopper 5g provided at the end of the tray 5 in the storage direction engages with the deepest portion 17a, so that the deepest portion 17a is between the first bending position and the second bending position. This stopper 5g positions the bending position at the first bending position. In addition, the deepest part 17a
A coil spring 17b is provided as a biasing means for biasing the frame toward the third bending position.

The third bending position described above is a position taken when the deepest portion 17a is attached to or removed from the tray 5. That is,
When removing the deepest portion 17a from the tray 5, the non-rack portion 17d (shown in FIG. 6), which is the engaging portion of the deepest portion 17a with the stopper 5g, is pushed upward (arrow Z direction), and the non-rack part 17
The deepest part 17 while making sure that d does not engage with the stopper 5g.
A is bent from the first bending position to the third bending position, and the deepest portion 17a is extracted from the pin 5f at this third bending position. Furthermore, when attaching the deepest portion 17a to the tray 5, the reverse operation is performed. Note that the pin 5f of the deepest portion 17a at the first and second bending positions is held by the rear end of the remaining portion of the rack portion 17 excluding the deepest portion 17a.
There will be a stop to the removal. That is, the deepest part 17a
When the is in the first bending position and the second bending position, the rack portion of the deepest portion 17a engages with the rear end of the remaining portion to prevent the deepest portion 17a from coming off the pin 5f. be. However, this removal preventing means allows the deepest portion 17a to be removed from the bin 5f when the deepest portion 17a is at the third bending position.

As shown in FIGS. 2 and 6, the player housing 2
The inner part of the tray 5 smoothly engages with the deepest portions 16a and 17a, and as the tray 5 is stored, the first
A guide member 30 is fixedly provided as a bending means for bending from the bending position to the second bending position. The guide member 30 has a triangular cross-sectional shape, and the provision of the guide member 30 allows each of the deepest portions 15a, 17a to be smoothly bent.

As is clear from FIG. 2, the pair of guide rails 13 and 14 that guide the tray 5 are movable in the extending direction, that is, the tray guide direction (in the direction of arrow Y and the opposite direction), and the player housing 2 is moved together with the tray 5. It can protrude outward. Each of the guide rails 13 and 14 has rack portions 13 on both left and right sides thereof along the movement direction and over the entire length.
b, 13c, 14b, and 14c are formed, respectively. As shown in FIG. 2, the gear 1 meshes with the right rack part 17 of the pair of rack parts 16 and 17 provided on the tray 5.
A gear 19b provided concentrically with the gear 9a meshes with a rack portion 14c on the outside of one of the guide rails 14. Also, as shown in FIG. 2, a gear 32a that meshes with the left rack portion 16 provided on the tray 5 is provided.
A gear 3 provided concentrically and integrally with this gear 32a
2b is engaged with the outer rack portion 13C of the other guide rail 13. As the motor 26 rotates, the gear 1
9b rotates to move one of the guide rails 14, and on the other hand, the rack part 1 provided on the tray 5 is moved by the rotation of the gear 19a that rotates together with the gear 19b.
6 rotates the gears 32a, 32b, thereby causing the other guide rail 13 to move. That is, each of the guide rails 13 and 14 is moved by being given a driving force by a driving means such as a motor 26 for moving the tray 5. Note that the ratio of the number of teeth of each gear is set so that the guide rail 13.14 moves, for example, 120 mm while the tray 5 moves, for example, 300 mm. This driving means moves only the guide rail 14 backward after the tray 5 is housed in the player housing 2.

The configuration for this will be explained next.

The gear 19a1 shown in FIG. 2, that is, the gear that meshes with the rack part 17 fixed to the tray 5, can swing freely in the vertical direction (in the direction of arrow Z and the opposite direction) via the bin 34a on the small chassis 18. The swing plate 3 provided in
4. However, other gears 19b, 20, 21, worm wheel 22, etc. arranged near this gear 19a are provided on the small chassis 18. 7th
As shown in the figure, the gear 1-9a and the gear 19b, which is provided concentrically with the gear and meshes with the outer rack portion 14c of the guide rail 14, have a clutch portion 19c.

19d is formed, and both gears 19a and 19b are connected and separated by the swinging of the swinging plate 34. In addition, as shown in FIG.
) Coil spring 3 that gives a piascus toward
5 is provided. As shown in FIG. 4 (ω and (C)), an engagement plate 36 is attached to the front end of the guide rail 14, which has a rack portion 14c that meshes with the gear 19, with a screw 36a. However, the screw 36a The engagement plate 36 is inserted into a long hole 14e formed in the guide rail 14 along the direction of extension of the guide rail, and the position of the engagement plate 36 can be adjusted by loosening the screw 36a.

When the guide rail 14 is housed in the braking housing 2, this engagement plate 36 is connected to the above-mentioned swing plate 34.
The swing plate 34 is engaged with the free end of the coil spring 35 to swing the swing plate 34 upwardly against the biasing force of the coil spring 35 (shown in FIG. 7). As a result, the clutch portions 19c and 19d of the gears 19a and 19b are disengaged, and the motor 26
As the gear 19b rotates, only the gear 19b rotates, and the gear 19a stops rotating. The position of the engagement plate 36 is set so that the clutch portions 19c and L9d are disengaged at the same time that the tray 5 is housed in the player housing 2. That is, after the tray 5 is housed in the player housing 2, the driving means including the motor 26 moves only the guide rail 14 rearward. As will be described later, after the tray 5 is housed in the player housing 2, only this guide rail 14 is moved backward, and the disc clamp mechanism is activated.

As shown in FIGS. 1 and 8, a turntable 40 for rotating the disks 8 to 10 by being directly rotationally driven by a motor 39 is disposed within the player housing 2 so that its disk supporting surface faces downward. and
Further, it is attached to a sub-chassis 41 as a first supporting member fixed to the player housing 2. Note that the sub-chassis 41 is also shown in FIG. The tray 5 mentioned above moves back and forth (in the direction of arrow Y and in the opposite direction) parallel to the disk supporting surface of the turntable 40.

For example, a disk 10 carried by the tray 5 and housed in the player housing 2 parallel to the disk supporting surface of the turntable 40 is positioned directly below the disk supporting surface of the turntable 40 with a predetermined gap therebetween. The disk 10 located directly below the turntable 40 is lifted upward (in the direction of arrow Z) by the disk clamp mechanism and separated from the tray 5, and is clamped against the disk supporting surface of the turntable 40. .

As shown in FIGS. 1 and 2 and FIGS. 8 to 10, the disk clamp mechanism contacts the disk 10 and attracts the disk toward the disk supporting surface of the turntable 40 using the magnetic force of the magnet. A disc-shaped pressing member 44 for pressing the disk, and a disc-shaped pressing member 44 provided at its free end rotatably in the vertical direction (direction of arrow Z and its opposite direction), that is, in a plane perpendicular to the disk supporting surface of the turntable 40. and a support member 45 as a second support member rotatably supporting the pressing member 44 on the side opposite to the disk supporting surface of the turntable, and It has a spring member 46 (shown in FIG. 8) as a biasing means for biasing the support member 45. As shown in FIGS. 2 and 9, a lever member 47 is arranged in front of the pressing member 44, and is attached to the small chassis 48 via a support pin 47a so as to be freely rotatable in the vertical direction. . An intermediate member 47c is rotatably attached to the action point, that is, the rear end, of the lever member 47 by a pin 47b, and the intermediate member 47c engages with the free end of the support member 45 via the pressing member 44. are doing.

A support shaft 50 parallel to the rotation center axis of the turntable 40 is provided on the small chassis 48 that supports the lever member 47 via a support pin 47a, and a disc-shaped cam member 51 rotates on this support shaft 50. It can be installed freely. 1st
As is particularly clear from FIG. 1, the cam member 51 has a spiral cam portion 51a formed around its rotational center axis, and the round bottle 47e protruding from the force point portion of the lever member 47 moves around the spiral cam portion 51a. It can smoothly slide into contact with the cam portion 51a. Cam member 5
1 is integrally formed with a gear 51b, which is connected to the right guide rail 14 via other two gears 52 and 53.
It meshes with the inner rack part 14b. That is, as the guide rail 14 moves backward, for example, as the motor 26 rotates, the cam member 51 rotates clockwise in FIG. 9, thereby causing the lever member 47 to rotate clockwise in FIG. The support member 45 is configured to rotate counterclockwise in FIG. 8, thereby clamping the disc. Also, when releasing the disk clamp, follow the reverse process. Note that when clamping and releasing the clamp, the lever member 47 is moved by the spring member 46.
The pressing member 44 (shown in FIG. 8)
is rotated while being pressed against the support member 45. Therefore, the pressing member 44 does not wobble while the supporting member 45 is rotating.

Here, the rotation support mechanism that rotatably supports the support member 45, which is a component of the disk clamp mechanism described above, will be described in detail.

As shown in FIGS. 2, 8 to 10, a support member 45, which is a rotating member, is provided at the rear end of the sub-chassis 41.
A rectangular first opening 41a (shown in FIG. 10) is formed at the rear end, through which a protrusion 45a extending upward is inserted. This protrusion 45a has a circular second opening 45.
b is formed. The second opening 45b is the first opening 4
1a, and has a diameter larger than the width b (shown in FIG. 10) of the first opening 41a. A spherical member 56 having a diameter larger than the width of the first opening 41a is arranged within the second opening 45b. Projection 45
A plate 57 is fixed to the lower end of the support member 57 between the plate 57 and the sub-chassis 41. A coil spring 58 is provided as a biasing means. Further, a circular opening 41b having an inner diameter larger than the width of the first opening 41a and smaller than the diameter of the spherical member 56 is formed in the center of the first opening 41a. The spherical member 56 is engaged with the circular opening 41b, and thereby the spherical member 56 is positioned so as not to shift relative to the first opening 41a and the second opening 45b.

That is, the circular opening 41b serves as a positioning means for a spherical member 56 that is interposed between the support member 45 and the subchassis 41 and smoothly slides on the support member and the subchassis.
The support member 45 is positioned so that it does not shift in the rotational plane and in the three axial directions perpendicular to this, and the support member 4
5. By pressing the three members, the sub-chassis 41 and the spherical member 56, against each other by the coil spring 58, the gap between the three members is made zero within the rotation plane of the support member 45. With this configuration, the support member 4
5 rotates with high precision without rattling.

As shown in FIGS. 2, 8, and 9, a tilt chassis 61 is rotatably attached to the lower surface of the above-mentioned support member 45 via a pin 61b. In addition, pin 61
b extends in the left-right direction (arrow X direction and the opposite direction). A carriage 62 carrying an optical pickup is disposed on the tilt chassis 61, and is guided by a guide shaft 63 to move along the recording surface of the disc 10 mounted on the turntable 40 and clamped. There is. Further, although not shown, a driving means for moving the carriage 62 is provided.

As is particularly clear from FIG. 9, the right rear end of the support member 45 that supported the tilt chassis 61 is
1 is provided with a motor 65 for rotating it.

A worm 65a is fitted to the output shaft of the motor 65, and the worm wheel 6 meshed with the worm 65a.
6, and a pin 66a protruding from the worm wheel radially offset from its rotation center is in smooth sliding contact with one free end of the tilt chassis 61.

Further, a spring member 67 is provided for imparting a bias tension to the tilt chassis 61. Therefore, as the motor 65 rotates and the bias applied by the spring member 67 causes the tilt chassis 61 to rotate, a tilt servo is performed.

The drive signal system of the drive means for rotating the support member 45 is provided with means for superimposing a signal representing the distance between the disk and the optical pickup, for example, a drive low frequency component.

Next, the configuration of the turntable 40 will be explained in detail.

As shown in FIG. 12, for example, an annular disk support member 76 made of rubber or the like is attached to the disk supporting surface of the turntable 40. As shown in FIG. In addition, a low friction member 78 made of a spherical member or the like that can freely protrude and retract from the disk supporting surface, and three coil springs 79 that provide a bias tension to the low friction member are arranged in the circumferential direction of the disk supporting surface. Arranged at equal pitch. This low friction member 78 comes into contact with the disk surface as the disk 10 mounted on the disk support surface of the turntable 40 approaches the disk support surface by a disk clamp mechanism including the pressing member 44. . As shown in FIG. 12, when the disc 10 is placed on the pressing member 44 in an inclined state, the pressing member 44 and the disc 1
0 approaches the turntable 40, the disc 1
0 abuts against the low friction member 7.8. As a result, the disk 10 is slightly moved in the radial direction while the inclination state on the pressing member 44 is corrected, and is returned to the normal horizontal state. In this state, the disc is clamped and the disc is centered with respect to the turntable 40 with high precision.

Next, the operation of the autoloading disc player having the above configuration will be briefly explained along with the playing procedure.

First, as shown in FIG. 1, the tray 5 is projected outside the player housing 2, and a disc 10, for example, is placed on the tray. Note that the operation of protruding the tray 5 out of the player housing is performed by following the reverse process of the retracting operation described below, and therefore will not be described in detail. Note that when the tray 5 protrudes outside the player housing 2, the guide rails 13 and 14 also protrude outside the player housing 2, and the tray 5 is firmly supported by the protruded guide rails.

After placing the disk 10 on the tray 5, switch group 7
When a command to start playing the disc is issued by operating the motor 26, the motor 26 starts rotating. As a result, the storage operation of the tray 5 and guide rails 13 and 14 is started. When the tray 5 is housed in the player housing 2 together with the guide rails 13 and 14, the engagement plate 36 (shown in FIGS. 4A and 4C) provided on the right guide rail 14 engages the swing plate 34. The free end (shown in FIG. 2) is engaged to cause the swing plate 34 to swing upwardly.

As a result, as shown in FIG. 7, the clutch parts 19c and 19d of the gears 19a and 19b are disengaged, and the tray 5
stops, and thereafter, as the motor 26 rotates, the gear 19b
Only the guide rail 14 rotates, and only the guide rail 14 is moved backward. However, due to the stoppage of tray 5, the left guide rail 1
3 is not driven and stops. By moving only the guide rail 14 backward, the spiral cam portion 51a of the cam member 51 shown in FIG. 2 comes into sliding contact with the round pin 47e of the lever member 47, and the lever member 47 rotates clockwise in FIG. It will be done. Therefore, the support member 45 is rotated counterclockwise in FIG. 8 by the lever member 47, and the pressing member 44
rises and presses against the disk holding surface of the turntable 40 so as to lift the disk 10 on the tray 5 and clamp it.

Note that the clamping is performed by a magnet (not shown) provided in the pressing member 44 being attracted to the turntable 40. At this time, if the disk 10 is placed obliquely on the pressing member 44 as shown in FIG.
As the disk 10 approaches the disk supporting surface of the turntable 40, the disk 10 moves toward the turntable 40.
The low friction member 78 is in contact with the low friction member 78 . This causes disk 10
is smoothly guided in the radial direction, its inclination is corrected, and it is centered with respect to the turntable 40 with high precision.

In this state, the motor 26 is stopped and the disc can be played.

Thereafter, the turntable 40 is rotated, the carriage 62 carrying the optical pickup is moved, and disk performance is started. Note that after the pressing member 44 has clamped the disk 10 to the turntable 40 by the attraction force of the magnet, the supporting member 45 that supports the pressing member is moved between the pressing member and the supporting member in order to make the pressing member rotatable. It is movable within the gap provided between the members. The height of the optical pickup: J5 is adjusted by driving the supporting member 45 within this movable range according to the wobbling of the disc 10 when the disc is played.

At the same time, the tilt chassis 61 is appropriately driven by the driving means to maintain an orthogonal relationship between the recording surface of the disk 10 and the optical axis of the irradiation light emitted from the optical pickup toward the recording surface.

When a detection means (not shown) detects that the carriage 62 has reached its movement limit position after the disc performance has ended, the carriage 62 and turntable 40 are stopped, and then the motor 26 starts to reverse. Accordingly, as described above, the tray 5 protrudes out of the player housing 2 together with the guide rails 13, 14 by following the process reverse to that described above, resulting in the position shown in FIG. Thereafter, the disk 10 is collected and the same operation is performed for the disk 8 or 9 thereafter.

Effects of the Invention As detailed above, the information recording disc playing device according to the present invention includes a pressing member (44) that presses the information recording disc toward the disc supporting surface of the turntable;
a support member (45) that is movably provided in a plane substantially perpendicular to the disk supporting surface and supports the pressing member;
and a drive means for moving the support member, the drive means including a lever member (
47), and a spiral cam that is rotatably provided around a central axis of rotation that is substantially perpendicular to the disk supporting surface of the turntable, is formed around the central axis of rotation, and is in sliding contact with the force point of the lever member. The cam member (51) includes a cam member (51) having a section, and a rotational force applying means for applying a rotational force to the cam member.

Since the support member that rotatably supports the pressing member is moved by the rotation of the small spiral cam member, the conventional information recording disc performance in which the support member is moved by the parallel movement of the large flat cam member is not possible. This makes it easier to downsize the entire device compared to other devices.

In addition, in the information recording disc playing device according to the present invention, since a lever member is interposed between the above-mentioned support member and the spiral cam member, the positions of the fulcrum, force point, and action point of this lever member can be adjusted as appropriate. By setting this, the driving force to be applied to the support member and its movement stroke can be freely adjusted.

[Brief explanation of the drawing]

FIG. 1 is a perspective view including a partial cross section showing the entire autoloading disc player according to the present invention, and FIG.
3 is a plan view including a partial cross section of the internal structure of the autoloading disc player shown in FIG.
The figure is a partially detailed view of the internal structure shown in Figure 2, and Figure 8 is a detailed view of the internal structure shown in Figure 2.
9 to 11 are partially detailed views of the internal structure shown in FIG.
Figure 2 is a side view including a partial cross section of the turntable;
The figure is a perspective view including a partial cross section of the internal mechanism of a conventional information recording disc playing device. Explanation of symbols of main parts 2...Player housing 5...Tray 5d...Sliding groove 5f...Pin 5g...Stopper 8 .9.10... Disc 12... Chassis 13.14... Guide rails 13b, 13c, 14b, 14c, 1
6. 17...Rack part 14a...Guiding protrusions 16a, 17a...Deepest part 17b, 35.58...Coil spring 17
d...Non-rack part 19a, 19b, 20, 21, 24, 25° 32a, 3
2b, 51b, 52. 53=-=-gear 26.39.
65... Motor 30... Guide member 34... Rocking plate 36... Engagement plate 40... Turntable 41 ...... Sub-chassis 41a... First opening 41b... Circular opening 44... Pressing member 45... Supporting member 45a... ...Protrusion 45b...Second opening 46.67...Spring member 47...Lever member 50...Support shaft 51... ... Cam member 51a ... Spiral cam portion 56 ... Spherical member 61 ... Tilt chassis 62 ... Carriage Applicant Pioneer Corporation

Claims (1)

[Claims] a pressing member that presses an information recording disk toward a disk supporting surface of a turntable; a supporting member that is movable in a plane substantially perpendicular to the disk supporting surface and supports the pressing member; and the supporting member. a drive means for moving the member, the drive means being rotatably provided around a lever member engaged with the support member at a point of action and a central axis of rotation substantially perpendicular to the disk supporting surface; a cam member having a spiral cam portion formed around the rotation center axis and slidingly in contact with a force point portion of the lever member;
An information recording disk performance device comprising a rotational force applying means for applying rotational force to the cam member.