JPH0135324Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is applicable to disk-shaped recording medium playback devices, such as disk players having a mechanism that allows a disk-shaped recording medium such as a compact disk to be pulled out and stored in a case. The present invention relates to a disc-shaped recording medium reproducing device suitable for use in a reproducing device.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, such a seed regenerating device has been used, for example, by pulling out a disk mounting body forward from a casing by driving a motor, placing a disk on the disk mounting plate, and then storing it in its original position. There is a playback device in which a disc mounting plate is lowered and a 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. 1, a chucking member CP is provided at the free end of an arm member AM rotatably supported with respect to a base B.
This chucking member CP is moved up and down with respect to the disk D on the turntable T together with the arm member AM.

However, in such a structure, the arm member
Since the chucking member CP is fixed to the AM, it is necessary to always leave a space of distance r on the case side as shown in Fig. 1.
As a result, the overall shape becomes large, especially the height, making it difficult to downsize.

In addition, since the rotational fulcrum of the arm member AM of the tracking member CP is located toward the center of the disk mounting body, it is possible to reinforce the bridge member between the movable rails arranged on both sides of the disk mounting body. As a result, there is a risk that the movable rail may be deformed or bent, resulting in inconvenience during assembly.

Moreover, as mentioned above, the chucking member CP is rotated with a fulcrum and moves up and down, so that the stabilizer ST of the chucking member CP is connected to the center cap C of the spindle motor shaft S, and the disc D
When chucking is performed, it is performed in an inclined state, and there is a risk that the disc D may swing or shift relative to the turntable T, resulting in inconveniences such as not being able to ideally perform centering and crimping.

Purpose of the invention In view of the above points, the present invention provides a disk-shaped recording medium reproducing device that can reliably chuck a disk-shaped recording medium and can be made compact by having a low shape, especially a low height. It is something to do.

Summary of the invention In order to achieve the above object, this invention uses a chucking arm equipped with a disc-shaped recording medium chucking member as a base, and has a recording medium ejecting recess formed on the side of the loading platform. The chucking member is supported so as to be movable towards and away from the turntable plane in parallel with the turntable plane, and the chucking member is always maintained parallel to the center portion of the turntable by parallel movement of the chucking arm. This has the effect that centering can be performed reliably when chucking a disk-shaped recording medium, and that it is also advantageous in terms of space and allows for miniaturization of the shape.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to FIGS. 2 to 7.

Figures 2 and 3 show the main parts of this invented device, Figure 2 is a perspective view of the loading platform housed in the case (not shown), and Figure 3 is the loading platform. It is a sectional view of a state where a stationary body is pulled out. In FIGS. 2 and 3, reference numeral 1 denotes a base, on which the loading platform 2 moves horizontally in the front and back direction, and is pulled out and stored in the case. This loading platform 2
The mounting and holding frame 3 has a circular inner space 3a having approximately the same diameter as a disk-shaped recording medium (hereinafter referred to as a disk), and has disk ejection recesses 3b and 3b' formed on both sides thereof. 4, 4' are extended rearward and fixed, a reinforcing plate 5 is fixed across the extended portions of the movable rail members 4, 4', and the mounting holding frame 3
A disk mounting plate 6 is disposed on the lower side thereof and is movable up and down corresponding to the inner cavity 3a. This loading platform 2 includes a movable rail member 4,
4' is a fixed rail member 7 attached to the base 1,
7' via rollers 8, 8', and is moved in the front-rear direction. In addition to metal, the mounting and holding frame 3 can be made of composite polymer material (BMC).

In this way, when the loading platform 2 moves forward in the front-rear direction with respect to the base 1, the loading holding frame 3 is pulled out from the casing, and in this state, the disk mounting plate 6 is moved forward. It moves upward and closes the lower surface side of the inner cavity 3a of the mounting and holding frame 3 to form a dish-shaped holding part for the disk. This is done by inserting fingers into 3b and 3b'.
Furthermore, when the loading platform 2 moves rearward and the loading/holding frame 3 is housed in the case, the disk platform 6 moves downward to allow the disk to be mounted on the turntable 9. .

Further, a support plate 11 is fixed to one side of the base 1,
A chucking arm 12 formed in a round shape is supported on the support plate 11 so as to be slidable in the vertical direction. That is, the horizontal surface portion 1 of the tracking arm 12
The vertical surface portion 12b is brought into sliding contact with the support plate 11 so that the bottom surface of the distal end of the vertical surface portion 2a faces the turntable 9, and a presser plate 13 having elasticity is brought into contact with and supported from the outer surface side. A chucking member 14 having a stabilizer is attached to the bottom surface of the tip of the horizontal surface portion 12a of the chucking arm 12, and an engaging pin 15 is provided horizontally protruding inward from the vertical surface portion 12a. Window hole 1 that is long in the vertical direction
6 is formed, and a projecting piece 17 is provided outwardly from the upper edge thereof, and the engagement pin 15 projects inwardly through a vertical guide hole 18 formed in the support plate 11, and a window hole 16 A protrusion 19 protruding from the support plate 11 is inserted through the support plate 11, and a tension coil spring 20 is stretched between the protrusion 19 and the protrusion 17 on the upper edge of the window hole. A plurality of steel balls 21 are interposed between the vertical surface portion 12b of the chucking arm 12 and the support plate 11 and between the presser plate 13, respectively. Support plate 1
Vertical grooves 22 and 23 are formed facing the arm vertical surface 12b between the grooves 22 and 23, and between the presser plate 13 and the arm vertical surface 12b. The groove 23' is inserted into the presser plate 1.
3 has a cut elastic recess 24 facing the recessed groove 23'.
are formed between the groove 23' and the elastic recess 24, and the support plate 11 and the presser plate 1
3 means that the guide/mounting pins 25 and 25' protruding from the upper and lower parts of the support plate 11 are connected to the presser plate 13 by passing them through guide elongated holes 26 and 26' formed vertically in the arm vertical surface portion 12b. Ring 27, 27'
The elasticity of the holding plate 13 causes each steel ball 2 to bind together.
1, the arm vertical surface portion 12b is pressed between the support plate 11 and the arm vertical surface portion 12b.

The chucking arm 12 guided and supported by the support plate 11 in this way is supported by the coil spring 2.
The horizontal part surface 12a is parallel to the mounting plate 6 through one disk ejection recess 3b of the mounting and holding frame 3, and the chucking member on the lower surface of the tip 14
corresponds to the turntable 9 in parallel.

Reference numeral 28 denotes a drive mechanism for moving the tracking arm 12 upward, that is, for moving the horizontal surface portion 12a upwardly and away from the mounting and holding frame 3. Drive motor 30
is attached to the motor 30, and a worm gear 31 is fixed to the shaft 30a of the motor 30.
A gear 33 coaxial with the worm wheel 32 meshes with a gear 35 having a substantially semicircumferential shape attached to the first rotating arm 34, so that the first rotating arm 34 rotates about the shaft 36. is configured to be moved. The first drive mechanism 28
The rotating arm 34 has a guide slot 37 in the substantially radial direction.
is formed, and an engaging pin 40 protruding from the end of a half portion 39a of the second rotating arm 39 whose central portion is pivotally supported on the support plate 11 by a shaft pin 38 is engaged with the guide elongated hole 37. The first rotating arm 34 is also formed with an operating piece 34a. The other half 39b of the second rotating arm 39, which is engaged with the first rotating arm 34, is divided into an inner and outer part and formed in a V-shape, and the tip of the outer part 39b' is a chucking arm. The engagement pin 15 protruding from the vertical part surface 12b of the inner part 39'' is abutted from below, and an operating protrusion 41 is protruded from the inner surface of the tip of the inner part 39'' to operate a circuit operation switch (not shown). ).

In the figure, 42 is an optical pickup, and 43 is a drive motor for the turntable 9. Furthermore, the mechanism for moving the loading platform 2 and the mechanism for moving the platform plate 6 up and down that have already been proposed can be applied, so a description thereof will be omitted.

Next, the operation of the apparatus of this example configured as described above will be explained.

Now, as shown in FIG.
When the disk mounting frame 3 is retracted and the mounting holding frame 3 is housed in the case, the disk mounting plate 6 is lowered and positioned slightly below the turntable 9, and as a result, the disk mounting plate 6 The disk (not shown) that was placed on the turntable 9 will now be placed on the turntable 9.

Further, the second rotating arm 39 of the chucking drive mechanism 28 is in a state where the other half 39b is lowered, and accordingly, the chucking arm 12 is pulled down by the coil spring 20 and lowered, and the horizontal surface portion 1
2a passes through the disc take-out recess 3b of the mounting and holding frame 3, and is positioned in the inner space 3a to face the disc mounting plate 6, and the chucking member 14 on the lower surface of the tip corresponds to the center cap of the turntable 9 and holds the disc. It is chucked with a predetermined pressure and used for performance.

When the performance is over and the power is turned on (not shown), the motor 30 of the chucking drive mechanism 28 is driven, and the gear 35 of the first arm 34 moves from the worm gear 31 through the worm wheel 32 and gear 33 in the clockwise direction in FIG. The first arm 34 also rotates clockwise, and the second arm 34 is engaged with the guide slot 37 formed in the first arm 34 via the engagement pin 40. The arm 39 is rotated counterclockwise about the central shaft pin 38, and this rotation causes the outer portion 39 of the other half portion 39b to rotate.
b' engages with the engagement pin 15 of the chucking arm 12 from below and is pushed up, and the chucking arm 12 is moved upward against the elastic force of the coil spring 20. When the chucking arm 12 is moved upward to a predetermined position in this manner, the chucking state of the disk by the chucking member 14 is released, and by further upward movement, the horizontal surface portion 12a is moved upwardly to the recessed portion 3b of the holding frame 3. It will be extracted upward from. On the other hand, the rotation of the first arm 34 causes the operation piece 34a to move the disk mounting plate 6 upward and release the loading platform 2, and the upward movement of the disk mounting plate 6 causes the turntable 9 to move upward. The upper disk is placed so as to be scooped up, and is held by the inner cavity 3a of the placing and holding frame 3 while being separated from the top of the turntable 9.

Then, when a motor (not shown) for moving the loading platform 2 is driven, the loading platform 2 is moved forward and the loading holding frame 3 is pulled out. Then, another disk is fitted and placed on this drawn-out loading/holding frame 3, and then the moving motor is driven in reverse to move the loading platform 2 backward, and the loading/holding frame 3 is housed in the case. Then, the motor 30 of the chucking drive mechanism 28 rotates in the opposite direction to that in the above case, and the first arm 34 rotates counterclockwise via the gear mechanism described above to interlock with the first arm 34. The second arm 39 rotates clockwise, and the other half 39b side
Engagement pin 1 of tracking arm 12 by 9b'
The tracking arm 12 is moved downward to release the push-up of the coil spring 20, and accordingly, the tracking arm 12 is pulled by the coil spring 20 and lowered.

On the other hand, the movement of the loading platform 2 is locked by the counterclockwise rotation of the first arm 34, and the disk placement plate 6 is moved down, so that the disk is placed on the turntable 9 as described above. The horizontal surface portion 12 of the tracking arm 12
a is lowered parallel to the plane of the turntable 9 so that it is fitted into the recess 3a of the mounting and holding frame 3, resulting in the state shown in FIG. 2, and is chucked by the chucking member 14. Also, the second arm 3
The circuit operation switch is turned on by the operation protrusion 41 of the other half inner part 39b'' of 9, and the performance is started.

When the performance is finished, each member operates in the same way as in the case described above, and the mounting and holding frame 3 is pulled out to take out the disc.

In the above operation, the tracking arm 12
In this case, the horizontal surface portion 12a to which the chucking member 14 is attached is moved up and down in parallel to the loading holding frame 3 of the loading platform 2, and is also lowered within the disk ejecting recess 3a of the loading holding frame 3. Therefore, the chucking member 14 can be placed extremely close to the disk mounting plate 6, and the chucking member 14 can chuck the center portion of the disc on the turntable 9 evenly, and the vertical portion 12b of the chucking arm 12 can be moved up and down by the supporting plate. 11 and the holding plate (13) through the steel plate 21, the chucking is carried out extremely smoothly without rocking. Also, the chucking arm 12
Since the reinforcing plate 5 of the movable rail members 4, 4' extending rearward from the mounting/holding frame 3 can be attached without any hindrance, the reinforcing plate 5 of the movable rail members 4, 4' Deformation and deflection can be prevented.

Application Example The present invention is not limited to the above-mentioned embodiment, but can be similarly applied to other cases having such a mechanism, such as analog disk players.

Effects of the invention As described above, according to this invention, the chucking arm to which the chucking member is attached is brought into contact parallel to the turntable plane through the disc ejection recess formed in the loading holding frame of the loading mounting body. Since it is configured to be separated, the center ring is ideal during chucking, and chucking can be performed reliably and easily.Moreover, the space in the movable direction of the chucking arm can be reduced, and the chucking mechanism can be made thinner. This has the effect of making it possible to realize miniaturization of the entire device.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view for explaining the conventional device, Fig. 2 is a perspective view showing the loading platform according to an embodiment of the invention in the stored state, and Fig. 3 shows the same in the pulled out state. 4 is a sectional view of the supporting portion of the chucking arm, FIG. 5 is an exploded perspective view of the same, FIG. 6 is a partially omitted side view of the chucking arm drive mechanism, and FIG. 7 is a sectional view of the supporting portion of the chucking arm. 2 is a sectional view taken along the - line in FIG. 2. In the figure, 1 is a base, 2 is a loading platform, 3 is a loading and holding frame, 3b and 3b' are disc ejection recesses,
6 is a disk mounting plate, 9 is a turntable, 11
12 is a supporting plate, 12 is a chucking arm, 12a is a horizontal surface portion, 12b is a vertical surface portion, and 14 is a chucking member.

Claims (1)

[Scope of utility model registration request] In a disk-shaped recording medium reproducing apparatus configured such that a loading body for a disk-shaped recording medium moves on a base and is pulled out and stored in a case, the disk-shaped recording medium is equipped with a tracking member for the recording medium. A recording arm is supported on the base so that it can move towards and away from the turntable plane parallel to the recording medium ejection recess formed on the side of the loading platform. . A disk-shaped recording medium reproducing device, characterized in that the tracking member is always maintained parallel to the center portion of the turntable.