JPH0512784B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a disc-shaped recording medium reproducing apparatus, such as a disc player having a mechanism that allows a disc-shaped recording medium such as a compact disc to be pulled out and stored in a housing. The present invention relates to a disk-shaped recording medium reproducing device suitable for use in the present invention.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, such a seed regeneration device has been used, for example, by driving a motor to pull out a loading part to which a disk mounting plate is attached to the housing forward, placing the disk on the disk mounting plate, and then placing the disk on the disk mounting plate. There is a playback device in which the disc is stored in its original position, the disc mounting plate is lowered, and the disc is mounted on a turntable to perform a performance or the like.

Such a playback device requires a so-called chucking function to rotatably press and hold the disc placed on the turntable.
In order to achieve such a function, conventionally, as shown in FIG. 1A, a chucking part CP is fixed to the free end of an arm member AM that is rotatably supported with respect to a support HB. was made to move up and down with the arm member AM relative to the disk on the turntable.

However, in the case of such a structure, since the chucking part CP is fixed to the arm member AM, it is necessary to always keep a margin of distance R on the housing side as shown in Fig. 1A. As a result, the overall shape becomes large, making it difficult to downsize.

Also, as mentioned above, the chucking part CP is an arm member.
In order to move up and down while fixed to the AM, as shown in Fig. 1B, there is a hole H provided in the protrusion of the stabilizer ST of the chucking part CP, and a turn that fits into this hole H during chucking. It was difficult to center the so-called chucking part CP because it came into contact with the shaft SH of the spindle motor to which the table was attached, and the hole H of the stabilizer ST was abraded by the shaft SH.

Purpose of the Invention The present invention has been made in view of the above, and provides a disk-shaped recording medium reproducing device that can reliably chuck a disk-shaped recording medium and can be miniaturized. It is.

Summary of the Invention The present invention includes a first arm member rotatably supported with respect to a base, a chucking portion support member rotatably supported on a free end of the first arm member, and a chucking portion support member rotatably supported on a free end of the first arm member. a chucking portion attached to the chucking portion support member; a second arm member rotatably supported at a position substantially midway between a rotation fulcrum of the first arm member and a support point of the chucking portion support member; A control section for controlling the rotation of the second arm member, and a chucking section support member control section provided on the second arm member, the chucking section being configured to control the chucking section when the first arm member rotates. By maintaining the turntable parallel to the plane, it is possible to ensure centering when chucking a disc-shaped recording medium, and it is also advantageous in terms of space, allowing for a smaller size. I can figure it out.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on FIGS. 2 to 9.

Figures 2 and 3 show the overall configuration of this embodiment. Figure 2 shows a state in which the loading section is housed in the casing (not shown), and Figure 3 shows a state in which the loading section is housed in the casing (not shown). The loading section is shown in a state where it is pulled out. In Figures 2 and 3, 1
is a base, and the loading section 2 moves back and forth on this base 1 to be pulled out from the casing or stored in the casing. Reference numeral 3 denotes a disk mounting plate that is attached to the loading section 2 so as to be movable up and down as will be described later, and when the loading section 2 is housed in the housing, the disk mounting plate 3 moves downward. When the loading section 2 is pulled out from the housing, it moves upward as shown in FIG. 3. In addition, a support plate 4 is installed at the rear of the base 1.
A first arm member 5 is rotatably supported by the support plate 4 via a shaft 6 serving as a rotation fulcrum. Further, a chucking part support member 7 is provided at the free end of the arm member 5, and one end of this chucking part support member 7 is pivotally attached to one end 5a of the arm member 5 via a shaft 8, while the other The end is pivoted to the other end 5b of the arm member 5 via a shaft inserted with a biasing member, such as a spring 9, so that the chucking part support member 7 can be rotated at the free end of the arm member 5. It is designed to be freely supported. A chucking portion 10 is attached to the central portion of the chucking portion support member 7.

Further, a second arm member 12 is rotatably supported on one side of the first arm member 5 at a position approximately midway between the shafts 6 and 8 via a shaft 11 serving as a support point (see FIG. 3).
Pins 13 and 14 are provided at both ends of this arm member 12, respectively.
is attached, and the pin 13 is fitted so as to be able to slide through a long hole 4a of a predetermined shape provided in the support plate 4 so as to be parallel to the base 1, while the pin 14 is provided on one side of the chucking part support member 7. curved protrusion 7
It is made to come into contact with a. Further, the protrusion 7b on one side of the chucking part support member 7 and protruding in the opposite direction to the protrusion 7a and the edge of the side end 5a of the arm member 5 are connected by a biasing member, for example, a spring 15. Due to the tension of the spring 15, the chucking portion support member 7 receives a clockwise rotating force about the shaft 8, so that the protrusion 7a is rotated against the pin 14.
As a result, the chucking portion support member 7 is always supported in the horizontal direction, that is, parallel to the turntable plane. Incidentally, the shaft 8 and the pin 14 are configured to rotate while always maintaining a parallel state with respect to the base 1, as will be described later.

Further, as shown in FIG. 4, a motor 16 for driving the loading section 2 is provided on the lower front side of the base 1, and a gear 17 attached to the shaft of this motor 16 is connected to a plurality of gears. The gears, for example, four gears 18 to 21, mesh with a rack member 22 provided on one side of the loading section 2, and the motor 16
The loading section 2 is configured to be able to move back and forth in accordance with the rotation of the.

5 and 6 show the drive mechanism for moving the disk mounting plate 3 and the chucking section 10 up and down. The figures each show a state in which the loading section 2 is pulled out from the housing. In FIGS. 5 and 6, a base 23 is provided at the rear of the base 1, and a drive motor 24 is provided at a predetermined portion of the base 23 for vertically moving the disk mounting plate 3 and the chucking section 10. The shaft 25 (partially gear-shaped) of this motor 24 meshes with a gear 26, and this gear 26 further meshes with a gear 27.
and 28, the gear 30 has a predetermined shape, for example, an arc shape, and is attached to the first rotating member 29 to mesh with and interlock with the gear 30. Further, a second rotating member 31 is provided with respect to the first rotating member 29, and these rotating members 29 and 31 are pivotally attached to the substrate 23 so that they can rotate coaxially around a shaft 32. There is. Further, a biasing member such as a spring 34 is stretched between a locking portion 31a formed by protruding and bending a part of the rotating member 31 and a pin 33 attached to a predetermined portion of the rotating member 29, and further rotates. Moving member 29
A pin 36 is attached to the arm portion 29a of the arm 29a, and the pin 36 is used to switch a switch 37 for terminating the operation of the circuit to which the board 23 is attached. Also, the switch 3 is adjacent to the switch 37.
8 is provided on the board 23, and this switch 38 switches the switching part 1 when the loading part 2 is pulled out.
0 and the disk mounting plate 3 are moved upward, the protrusion 29b of the rotating member 29 touches its contact piece 38a.
By coming into contact with and pushing it, the switch is turned on and starts driving the motor 24 for driving the loading section. Further, the rotating member 31 has a locking portion 31b formed by protruding and bending a part of the rotating member 31.
is provided apart from the locking portion 31a, and the vertical movement of the disk placement plate 3 is controlled by engagement between the locking portion 31b and a lever for driving the disk placement plate, which will be described later. Further, a switch 40 is provided via a support plate 39 attached to the rear of the base 1, and a portion of the loading reinforcing plate 66 attached to the rear of the loading section 2 is cut out at the contact point of this switch 40, and the remaining portion is cut out. A protrusion 66 formed by bending a portion
By engaging a, the switch operation is changed. Furthermore, this switch 40
A switch 41 provided next to the switch 41 and a switch 42 provided below the above-mentioned switch 37 are switches for ensuring the safety of the laser beam of the optical system, although they are not shown. 3
7 and can be switched together.

Further, a biasing member such as a spring 44 is tensioned between a locking portion 23a formed by partially protruding the portion of the base 23 to which the switch 38 is attached and a chucking support shaft 43 provided at the rear of the arm member 5. On the other hand, a pin 45 is provided on the back side of the rotating member 29, and when the rotating member 29 is rotated clockwise by the motor 24 when the loading section 2 is pulled out, the pin to which the rotating member 29 is attached is attached. 45 connects the chucking support shaft 43 to the spring 4
4, the arm member 5 to which the chucking support shaft 43 is attached is pushed out against the tension of the third arm member 4.
As shown in the figure, it rotates upward about the shaft 6,
The chucking part 10 is lifted.

Figure 7 shows the loading section 2 of the disk mounting plate 3.
In the figure, the disk mounting plate 3 has wings 3a, 3b, 3c in a predetermined shape, for example, an L-shape, which protrude from the bottom of the main body on both sides, respectively. 3d, and are attached to pins 47a to 47d that protrude outwardly with respect to these wing parts 3a to 3d. Further, levers 48 and 49 having the same shape are provided on both sides of the disk mounting plate 3. These levers 48 and 49 are attached to both sides of the loading section 2 so as to be slidable a predetermined amount back and forth (see FIG. 4). The levers 48 and 49 are provided with cam grooves 48a, 48b and 49a, 49b of a predetermined shape corresponding to the above-mentioned pins 47a, 47b and 47c, 47d, respectively, so that the disk mounting plate 3 can move up and down. cam groove 48a,
Pins 47a, 47b to 48b and 49a, 49b
and 47c, 47d are slidably fitted.

Further, a connecting rod 50 whose both ends are rotatably attached to the loading portion 2 is provided, and the rear portion 48c of the lever 48 is attached to each end of the connecting rod 50.
Also provided are engaging members 51 and 52 that selectively abut the rear portion 49c of the lever 49. These engaging members 51 and 52 are driven via a lever 57, which will be described later, so that driving force is transmitted to the other via the connecting punch 50 with the same stroke. Further, the rear sides of the levers 48 and 49 are always biased in the upward direction of the disk mounting plate 3 by biasing members such as coil springs 53 and 54. The other ends of the springs 53 and 54 are attached to pins 55 and 56, respectively, which are erected on the loading reinforcing plate 66. Note that instead of these pins 55 and 56, projections may be provided on the reinforcing plate 66 and used as a substitute. Further, a lever 57 having a predetermined shape, for example, a substantially V-shape, is rotatably attached to the protrusion 66b of the loading portion reinforcing plate 66 by a shaft 58, and one end 57a of this lever 57 is connected to a biasing member, for example, a spring 59. A pin 60 (not shown) is attached to the loading portion 2, and a pin 60 is attached downward near one end 57a, and a pin 61 is attached downward to the other end 57b. Then, the engaging portion 31b (FIG. 5) of the rotating member 31 described above is engaged with this pin 60,
The lever 57 is connected to the spring 59 with the shaft 58 as the fulcrum.
By rotating the lever 57 clockwise against the rotation, the pin 61 of the lever 57 rotates the engaging member 51 clockwise, and the lever 52 also rotates clockwise, so that the levers 48 and 49 move forward. The disk mounting plate 3 is moved downward.

Furthermore, to explain the vertical movement of the disk mounting plate 3, first, when the loading section 2 is pulled out from the housing and a disk is placed on the disk mounting plate 3, the levers 51 and 52 are moved by the springs 53 and 54. It is biased toward pins 55 and 56. By the deflection of these levers 51 and 52, the pins 47a and 47a arranged on each wing section on both sides of the disk mounting plate 3,
47b, 47c, and 47d are the cam grooves 4 of the lever 48
8a, 48b and cam grooves 49a, 49 of lever 49
are located above the disk mounting plate 3, respectively.
is in a state where it has moved upward as shown in FIG. On the other hand, when the loading section 2 is housed in the housing, the engaging members 51 and 52 rotate clockwise as described above when the loading section 2 is housed, and the levers 48 and 49 are moved forward (as shown in the drawing). The pins 47a, 47b and 47c, 47d provided on the wings on both sides of the disk mounting plate 3 are pushed out against the springs 53 and 54 (leftward direction), and the lever 4
8 and cam grooves 49a and 49b of the lever 49 in the vertical direction in the drawing, and the disk mounting plate 3 is also lowered downward accordingly. As a result, disk mounting plate 3
The disk (not shown) that was placed on the housing is now placed on a turntable that is rotated by being connected to the shaft of a spindle motor (not shown) that is provided inside the housing. At this time, disk mounting plate 3
It is said that it is located slightly below the disk.

Then, the disc placed on the turntable is mounted on the turntable under a predetermined pressure by the chucking section 10, and is used for performance.

Further, when the performance is finished, contrary to the above, the tracking section 10 separates from the disk, and the disk mounting plate 3 rises and further rises to its original position with the disk placed on the turntable on it. Thereafter, the loading section 2 is pulled out from the casing by driving the motor. As a result, the disk placed on the disk mounting plate 3 can be taken out.

FIG. 8 shows a first arm member 5 to which a chucking portion 10 is attached and a second arm member 1 that interlocks the first arm member 5.
This diagram schematically shows the operation of step 2, and in the same figure,
A solid line A represents the position of the arm members 5 and 12 during chucking, and solid lines B and C represent the position of the arm members 5 and 12, respectively, when not chucking. That is, at the time of tracking, the arm members 5 and 12 are located substantially in a straight line, and therefore, in this state, the axes 6 and 8 of the arm member 5 and the axis 13 of the arm member 12,
11 and pin 14 are also located substantially in a straight line.
Note that if the distances from the shaft 11 to the shafts 6 and 8 are a and a', and the distances from the shaft 11 to the shaft 13 and pin 14 are b and b', then a=a', b
The positional relationship =b' is established.

During non-chucking, when the arm member 5 rotates around the shaft 6 as a fulcrum as described above to the position indicated by the broken line B, the arm member 12 also rotates around the shaft 11 as a fulcrum to the position indicated by the broken line C. One shaft 13 of the member 12 moves along a long hole 4a provided in parallel to the base 1 of the support plate 4 to a position shown by a broken line. At this time, the distances a and a' from the shaft 11 to the shafts 6 and 8, respectively, are of course in the positional relationship a=a', but the distances b, b' from the shaft 11 to the shaft 13 and the pin 14, respectively, are also b = b′ positional relationship. This means that the shaft 8 and pin 14 always move up and down parallel to the position of solid line A.

In other words, when one shaft 13 of the arm member 12 slides with reference to the elongated hole 4a provided in parallel to the base 1 of the support plate 4, the other pin 14 of the arm member 12 moves toward the chucking portion support member 7. The support shaft 8 and the length from the base 1 are equal, and the chucking part support member 7 always moves up and down parallel to the base 1. In other words, the chucking portion 10 is always maintained parallel to the turntable plane when the arm member 5 rotates.

FIG. 9 shows a state in which the chucking portion 10 is not chucked with respect to the disk 62 (FIG. 9A) and a chucked state (FIG. 9B).
0 is a support member 10a fixed to the chucking part support member 7 with, for example, screws, and this support member 1.
A stabilizer 10b is fitted into the interior of the stabilizer 0a so as to be movable up and down, and a bearing 10c has a hemispherical tip so as to be in point contact with the stabilizer 10b.
The shaft of the bearing 10c is slidably inserted into the central portion of the bearing 10c, and the guide member 10d is press-fitted into the chucking part support member 7.
A biasing member such as a spring 10e is inserted between the front end of the bearing 10c and the stabilizer 10b, and the stabilizer 10b is constantly pressed downward by the spring 10e. Moreover, the support member 10a and the stabilizer 10
The abutting portions of b are formed to have similar inclination angles, and by fitting these two together, the stabilizer 1
0b is always located at the center of the chucking part support member 7. Also, stabilizer 1
A pressure felt 10f is attached to the portion of 0b that comes into contact with the disk 62. Further, an opening 10g is provided in a portion protruding from the center of the stabilizer 10b, corresponding to the spindle motor shaft 65 to which the turntable 63 and center spindle 64 are attached.

Therefore, when chucking, the spindle motor shaft 65 enters the opening 10g of the stabilizer 10b as shown in FIG. 9B, and the disc 62
The felt 10 attached to the tip of the stabilizer 10b on the disk 62 ensures centering for the spindle motor (not shown).
It is pressed against the turntable 63 by f. In addition, since the stabilizer 10b is pushed upward against the elastic force of the spring 10e, the stabilizer 10b and the support member 10a are disengaged, and the stabilizer 10b is slightly lifted upward. At this time, since the tip of the bearing 10c that comes into contact with the stabilizer 10b is spherical, the contact with the stabilizer 10b is a point contact, and there is little unnecessary loss during chucking.

Next, the overall operation of this device will be explained. Now, when the loading section 2 is housed in the housing as shown in FIG. 2, the mechanism for controlling the vertical movement of the disk mounting plate 3 and the chucking section 10 is in the position shown in FIG. It is in. That is, the pin 60 of the lever 57 shown in FIG.
Turn levers 1 and 52 clockwise to release levers 48 and 49.
is pushed out, and the disk mounting plate 3 is positioned downward. Also, the chucking support shaft 43 provided at the rear of the arm member 5 is pulled by the spring 44 and is not pushed by the pin 45 of the rotating member 31, so the arm member 5 is in a lowered state. The chucking portion 10 attached to the free end of the arm member 5 is also lowered and in the chucking state.

Now, when the power is turned on (not shown), the motor 24 drives the gear 3 through the gears 26 to 28.
0 rotates clockwise. Along with this, the rotating member 29 rotates clockwise, and the pin 45 attached to the rotating member 29 is rotated against the chucking support shaft 43.
is pushed forward against the elastic force of the spring 44. Then, the arm member 5 rotates upward to a predetermined value about the shaft 6, thereby releasing the chucking state of the chucking portion 10. At this time, the chucking section 10 is always maintained parallel to the top surface of the turntable by the action of the arm member 12. Also, the rotating member 29
As the rotating member 31 rotates clockwise, the engaging portion 31b and the lever 57 are disengaged, whereby the levers 48 and 49 are pulled rearward by the springs 53 and 54. Therefore, the disk mounting plate 3 is moved upward. That is pin 47
a, 47b and 47c, 47d are located above the cam grooves 48a, 48b and 49a, 49b, as shown in FIG. and rotating member 29
The protrusion 29b of the switch 38 comes into contact with the contact piece 38a of the switch 38, and when the switch is turned on by pressing this, the motor 2
4 is stopped, and at the same time, the motor 16 (FIG. 4) for driving the loading section is operated, and thereby the loading section 2 is pulled out to the front as shown in FIG.

Then, the disk is placed on the disk mounting plate 3 provided on the loaded loading section 2 that has been pulled out, and then the motor 16 is rotated in the reverse direction and the loading section 2 is retracted. (Figure 6) is the switch 40
At the point where the switch comes into contact with the contact point of
The operation switches to The motor 24 then rotates in the opposite direction and is connected to the gear 30 via the gears 26 to 28.
is rotated counterclockwise, and the rotating member 29 is rotated accordingly.
Since the rotating member 31 also rotates counterclockwise, the engaging portion 31b of the rotating member 31 pushes the lever 57, and thereby the disk is mounted. The placing plate 3 is lowered downward, and the disk on this disk placing plate 3 is placed on the turntable.

Also, at this time, the pin 45 provided at the bottom of the rotating member 29 moves backward as the rotating member 29 moves, and the pressure on the chucking support shaft 43 attached to the rear of the arm member 5 is gradually released. As a result, the chucking support shaft 43 is pulled by the spring 44, thereby causing the arm member 5 to rotate downward. As a result, the chucking part support member 7 attached to the free end of the arm member 5 also rotates downward, so that the chucking part 10 attached to the chucking part support member 7 moves the disc on the turntable. Chatting is done. After that, the performance begins.

When the performance is finished, contrary to the above, the chucking unit 10 is separated from the disc, and the disc mounting plate 3 is raised to its original position with the disc placed on the turntable. 16, the loading section 2 is pulled out from the housing, and the disk placed on the disk mounting plate 3 is taken out.

Application Examples The present invention is not limited to the above-described embodiments, but can be similarly applied to other cases requiring such functions, such as analog disk players.

Effects of the Invention As described above, according to the present invention, when the first arm member to which the chucking part is attached rotates, the chucking part is always kept parallel to the turntable plane, so that the chucking part is kept parallel to the turntable plane. Chucking, especially centering, can be performed reliably and easily, and it is also advantageous in terms of space, and the size can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram for explaining a conventional device, Fig. 2 is a perspective view showing an embodiment of the present invention in a stored state, and Fig. 3 shows an embodiment of the invention in a pulled out state. A perspective view, FIG. 4 is a configuration diagram showing the loading section drive system, FIG. 5 is a configuration diagram showing the disk mounting plate and chucking section drive system in a stored state, and FIG. 6 is a configuration diagram showing the disk mounting plate and chucking section. Fig. 7 is a block diagram showing the drive system in a pulled out state, Fig. 7 is a block diagram to explain the vertical movement of the disk mounting plate, and Fig. 8 is a line diagram to explain the parallel movement of the chucking section. , FIG. 9 is a sectional view showing the chucking portion in a non-chucking state and a chucking state. 1 is a base, 2 is a loading part, 3 is a disk mounting plate, 5 is a first arm member, 7 is a chucking part support member, 10 is a chucking part, 12 is a second arm member, 16 and 24 are motors , 29, 31 are rotating members, 30 is a gear, and 37, 38, 40 are switches.

Claims (1)

[Claims] 1. A first arm member rotatably supported with respect to the base, a chucking part support member rotatably supported at the free end of the first arm member, and a chucking part support member attached to the chucking part support member. a second arm member rotatably supported at a position substantially intermediate between a rotation fulcrum of the first arm member and a support point of the chucking portion support member; and a chucking part support member control part provided on the second arm member, wherein when the first arm member rotates, the chucking part is rotated relative to the turntable plane. A disc-shaped recording medium reproducing device characterized in that the disc-shaped recording medium is maintained in a parallel state.