JPH0555947B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk clamp device suitable for use in a vehicle disk reproducing device.

[Summary of the invention]

In the present invention, the disk is clamped while being held by the retainer.

[Conventional technology]

Recently, research has been conducted on vehicle navigation devices that play back map information recorded on a so-called CD-ROM or the like and display the current location of the vehicle to guide the vehicle to a predetermined destination, and some of them have been commercialized. Such a disk playback device for a vehicle is basically constructed in the same way as a home disk playback device, but since vibrations in a vehicle are more intense, measures are taken to prevent the disk clamping state from becoming unstable due to vibration. There is a need.

[Problem that the invention seeks to solve]

However, in conventional devices, the clamping state of the disk to the turntable is disturbed by vibration, which not only makes it impossible to obtain a correct playback signal, but in the worst case, the disk may collide with something and be damaged. .

[Means for solving problems]

The present invention provides a disk clamp device including: a spindle rotated by a motor; a turntable rotated integrally with the spindle; a retainer that supports the disk; a locking member that locks the outer periphery of the disk to the retainer; a centering hub that is slidably arranged against the turntable; and protrusions that are provided on one and the other of the centering hub and the turntable and are mutually locked in order to rotate the centering hub integrally with the turntable. a recess, a protrusion and a recess that are provided on one and the other of the retainer and centering hub to rotate the retainer integrally with the centering hub, and that are engaged with each other; The invention is characterized by comprising a leaf spring that presses against.

[Effect]

The disk is supported by a retainer, and the disk is clamped on the turntable while being supported by the retainer.

〔Example〕

1 to 5 show the structure of the disk clamping device of the present invention. In these figures, 1 is a chassis, which is supported by an insulator 2 so that vibrations are not transmitted. Reference numeral 3 denotes a motor fixed to the chassis 1, which rotates the spindle 4 and turntable 5 integrally. Reference numeral 6 denotes a friction member made of rubber or the like, which is bonded on the turntable 5, and generates an appropriate frictional force to prevent the placed disc 9 from slipping, and also prevents scratches etc. from forming on the surface of the disc 9. It's protected like that. 7 is a centering hub, which is slidable with respect to the spindle 4. 8 is a coil spring, which always urges the centering hub 7 upward.

Reference numeral 10 denotes a retainer made of metal or the like, which is composed of an annular portion 25 at the outermost periphery, a central plane portion 27, and an arm portion 26 connecting the two, which provides sufficient strength and minimizes the mass as much as possible. An opening 28 is formed for this purpose.
The center plane portion 27 constitutes a surface on which the retainer 10 is placed on the turntable 5, and a center hole through which the centering hub 7 is inserted is formed at its center. A coil spring 12 is provided between the cut-out portion 11 of the retainer 10 and the cut-out portion 13 of the locking member 14.
is installed. The locking member 14 has a disk 9
A bent portion 15 is formed which is bent in the direction of the outer circumferential end. Reference numeral 16 denotes a conical inclined surface formed on the outer periphery of the centering hub 7, which contacts the center holes of the disk 9 and the retainer 10 to center them. Reference numeral 17 denotes a recess provided in the turntable 5, which locks a protrusion 18 provided in the centering hub 7 (the positions of the protrusion 18 and the recess 17 may be opposite to each other). 19 is a protrusion provided in the center hole of the retainer 10, 20
is a recess provided in the centering hub 7,
They are locked to each other (the positions of the protrusion 19 and the recess 20 may also be reversed). Reference numeral 21 denotes a substantially three-pronged leaf spring, which has a substantially hemispherical protrusion 22 on its outer periphery. 23 is a C ring, which is fitted into the small diameter portion 24 of the spindle 4.

To describe the assembly work, first insert the coil spring 8 into the inner recess of the turntable 5, then insert the centering hub 7 into the spindle 4.
Attach to. At this time, the protrusion 18 of the centering hub 7 is inserted into the recess 17 of the turntable 5.

On the other hand, with the disk 9 in contact with the lower surface of the retainer 10, the locking member 14 is once pulled in the outer circumferential direction against the biasing force of the coil spring 12, and then released. Then, the bent portion 15 of the locking member 14, which is urged in the inner circumferential direction by the coil spring 12, presses the outer circumferential end (side surface) of the disk 9, so that the disk 9 is supported (locked) by the retainer 10. Figure 5). In order to make this pressing more reliable, the outer diameter of the retainer 10 is made slightly smaller than the disk 9 (second
(Fig. 5). The retainer 10 is placed on the turntable 5 while holding the disk 9 in this manner. At this time, the disk 9 is placed on the lower side (on the turntable 5 side), and the protrusion 19 of the retainer 10 is positioned within the recess 20 of the centering hub 7.
Since the centering buff 7 has its inclined surface 16 in contact with the center hole of the disk 9 and the retainer 10 and is pressed, it is guided by the spindle 4 and moves slightly downward against the biasing force of the coil spring 8. At this time, the disk 9 and the retainer 10 are centered, and their centers coincide with the center (rotation center) of the spindle 4.

Next, the leaf spring 21 is attached to the spindle 2, and the C-ring 23 is further fixed to the small diameter portion 24 of the spindle 4 from above. As a result, the protrusion 22 of the leaf spring 21 presses the disk 9 onto the turntable 5 via the retainer 10, and the disk 9 is clamped onto the turntable 5.

To remove it, remove the C-ring 23 from the spindle 4 and work in the reverse order as described above.

When the motor 3 is rotated, the turntable 5 and spindle 4 rotate integrally. The turntable 5 is in contact with a disk 9 via a friction member 6. The protrusion 18 of the centering hub 7 is engaged with the recess 17 of the turntable 5, and the protrusion 19 of the retainer 10 is engaged with the recess 20 of the centering hub 7.
is locked, so the retainer 10 rotates integrally with the turntable 5. Therefore disk 9
rotates integrally with the turntable 5 without slipping.

Further, even if the disk 9 is not used for a relatively long period of time, the retainer 10 supports the disk 9 substantially in parallel, so that the outer peripheral end of the disk 9 is prevented from hanging downward, and a so-called tilt servo is not required.

In the above embodiment, the bent portion 15 of the locking member 14 presses and supports the outer circumferential side of the disk 9. For example, as shown in FIG. It may be further bent to form a hook portion 32, and the disk 9 may be supported from below by the hook portion 32. In this case, the locking member 14 is placed on the fulcrum 31 on the retainer 10.
The coil spring 12 can be omitted by supporting it rotatably around the center.

In the above example, the disk 9 is placed on the bottom side and the retainer 10 is placed on the top side, so that playback is performed from the bottom to the top.
It may be clamped with 0 on the bottom. In this case, the locking member 14 can be omitted.

〔effect〕

As described above, the present invention provides a disk clamp device that includes a spindle rotated by a motor, a turntable that rotates integrally with the spindle, a retainer that supports the disk, and a locking member that locks the outer periphery of the disk to the retainer. , a centering hub that is arranged to be slidable with respect to the spindle, and projections that are provided on one and the other of the centering hub and turntable and are mutually locked in order to rotate the centering hub integrally with the turntable. a protrusion and a recess that are provided on one and the other of the retainer and the centering hub and are mutually engaged in order to rotate the retainer integrally with the centering hub; a protrusion and a recess that are fixed to the spindle;
Since the disk is provided with a leaf spring that presses the disk onto the turntable, the disk can be accurately clamped with a simple structure so that it will not slip even if there is vibration.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the disc clamping device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a plan view of the leaf spring, Fig. 4 is a front view thereof, and Fig. 5 is a diagram of the disc clamping device. Partial sectional view, FIG. 6 is a partial sectional view of another embodiment. 1... Seat, 2... Insulator, 3...
... Motor, 4 ... Spindle, 5 ... Turntable, 6 ... Friction member, 7 ... Centering hub, 8 ... Coil spring, 9 ... Disc, 10 ...
...Retainer, 11... Cut-out portion, 12... Coil spring, 13... Cut-out portion, 14... Locking member, 15...
...Bending portion, 16... Inclined surface, 17... Concave portion, 1
8, 19... Protrusion, 20... Recess, 21... Leaf spring, 22... Protrusion, 23... C ring, 31...
...Fully point, 32...Hook part.

Claims (1)

[Claims] 1. A spindle rotated by a motor, a turntable rotated integrally with the spindle, a retainer that supports the disk, a locking member that locks the outer periphery of the disk to the retainer, and a locking member that locks the outer periphery of the disk to the retainer. A slidably disposed centering hub; and protrusions provided on one and the other of the centering hub and the turntable and locked to each other in order to rotate the centering hub integrally with the turntable. and a recess, a protrusion and a recess that are provided on one and the other of the retainer and the centering hub and are locked to each other in order to rotate the retainer integrally with the centering hub, and a projection and a recess that are fixed to the spindle. , and a plate spring that presses the disk onto the turntable.