JPH0531755Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a disc player equipped with a loading case having a lifter that moves the disc up and down. Regarding the vibration structure.

[Prior art]

Conventional disc players are designed to allow the use of one type of disc with an outer diameter size, so there is sufficient clearance between the top surface of the lifter and the disc placed on the spindle hub, but two types of discs can be used. In a particularly thin disk player that can use a lifter, a plane having a stepped portion on which the outer peripheries of the two types of disks are respectively placed is formed on the lifter, so it is not possible to provide sufficient clearance between the upper surface of the lifter and the lower surface of the disk. Therefore, if the base plate to which the spindle motor is attached is held on the chassis with a vibration-proof structure using rubber bushings or springs, there is a drawback that the lifter and the disk come into contact with each other due to vibration.

[Purpose of invention]

In view of the above-mentioned drawbacks, the present invention proposes a vibration-proof structure for a disk player that prevents contact between the disk and the lifter using a washer that prevents the rubber bushing from falling off.

[Structure of the idea]

The present invention consists of a lifter that moves up and down to load a disk onto a spindle hub, a chassis that slidably holds a loading case fitted with this lifter, and a support that is fixed to this chassis.
A rubber bushing has a main plate fixed to a spindle motor etc. fixed to an annular groove formed in the body inserted through this pillar, and a fixing screwed to the pillar that prevents the rubber bushing from falling off via a washer. a screw, the rubber bush has a large-diameter collar below the annular groove, an upright piece is formed on the peripheral edge of the washer, and a clearance between the lower surface of the disk and the upper surface of the lifter in a loaded state is provided. A is that the clearance B between the flange portion and the upright piece is made smaller to prevent contact between the disk and the lifter due to vibrations or the like.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments. The anti-vibration structure of the disc player is shown in Figures 1 and 2, with ribs 2 on both sides of the loading case 2 on the chassis 1.
A and a plurality of hooks 10 fixed on the chassis 1
It is slidably provided before and after the disk loading position where information on the disk is read and the eject position shown in FIG.

At three locations on the chassis 1, there are supports 1 as shown in Figure 1.
1 is fixed by outsert molding. Pillar 1
As shown in FIGS. 1 and 3, a rubber bush 3 is inserted through the support 1 and is prevented from falling off by a washer 4 which is attached with a fixing tassel pin screw 12 screwed onto a support 11. The rubber bush 3 is formed into a cup shape, with an upper part 3b of a body 3a pressed against the back surface of the chassis 1, and an annular groove 3c formed therein. A large diameter collar portion 3d is formed below the annular groove 3c. A through hole in the base plate 13 is fitted into and locked in the annular groove 3c. Main plate 1
A spindle motor 14 is fixed to 3.
A spindle hub 15 is fixed to the rotating shaft of the spindle motor 14.

A plurality of upright pieces 4a are cut into the periphery of the washer 4.
is formed. A coil spring 16 is inserted between the upright piece 4a and the body 3a.

Spindle hub 15 for loading case 2
A disk-shaped lifter 5 having a hole 2b larger than the outer diameter of the disk 17 placed on top and rotated and having notches 5a on both sides is inserted from below.
As shown in FIG. 4, four arms 5b of the lifter 5 are held by protrusions 2c protruding from the back surface of the loading case 2 so as to be movable up and down, and are urged downward by a spring (not shown). Triangular projection plates 5c are formed at four locations on the lower surface of the lifter 5 and inserted into the long holes 6a of the slider 6, and the lifter 5 is moved up and down by sliding of the slider 6. The lifter 5 has a large notch 5d for relief for the hub 15, etc., and the top surface of the lifter 5 has a positioning step 5e for 8mm discs and a positioning step 5f for 12mm discs on the outside thereof.
is formed. The flat surfaces of the lower surfaces of the stepped portions 5e and 5f are formed as surfaces that are inclined toward the center so as to receive the outer edge of the disk in line contact. A notch hole 6b larger than the notch hole 5d is formed in the slider 6, and the rear side of the notch hole 6b is bifurcated so as to sandwich the disk holder 7 therebetween.

Four elongated holes 6c are drilled in the slider 6, and a pin 18 fixed to the loading case 2 and a protrusion 2d are inserted into the slider 6, and ribs 6 on both sides of the slider 6 are inserted.
d is the L-shaped holder 2e of the loading case 2
It is slidably attached to the back surface of the loading case 2 so as to sandwich the lifter 5 therebetween. A rack 6e is formed on one side of the slider 6 and is engaged with a pinion (not shown) rotated by a loading motor (not shown).

The disc holder 7 is attached to a pair of bearing stands 19 provided on the chassis 1 as shown in FIG.
It is rotatably supported by shaft portions 7a protruding from both sides. Vertical operation pins 7b protrude from both sides of the rear side of the shaft portion 7a of the disc presser 7, and are provided so as to be able to ride on a pair of base portions 20 provided on the chassis 1. Chassis 1
A spring (not shown) stretched between the base portions 20 is biased to contact the base portion 20 . Furthermore, the pin 7b is provided on the upper surface of both rear sides of the slider 6, as shown in FIG.
When the disc presser 7 is placed on a plane (not shown) from f, the other side of the disc holder 7 is in a lowered state. Disc presser foot 7
In the center of the other side, a collet 8 is inserted from below to above as shown in FIG. 1, and as shown in FIG. being pushed down.

When the loading case 2 of the disk player configured as described above is in the disk loading position, the clearance between the lower surface of the disk 17 and the upper surface of the lifter 5 in FIG. If the clearance between the upper surface of the upright piece 4a of No. 4 is B, then A>B.

When the vibration isolation structure of the disc player is configured as described above, the clearance A is made larger than the clearance B, so when the body 3a of the rubber bush 3 is compressed due to large vibrations, the upright piece of the washer 4 is attached to the collar 3d. 4a is brought into contact and damped, and even if the clearance between the lower surface of the disk 17 and the upper surface of the lifter 5 is small, the disk 17 is prevented from contacting and damaging the upper surface of the lifter 5, making the disk player thinner. I can do it. Furthermore, since vibration can be damped by the washer 4 which prevents the rubber bush 3 from falling off, there is no need to use a separate part for contact, and the number of parts can be reduced.

Although the coil spring 16 is provided outside the rubber bush 3 in FIG. 3, the coil spring 16 may be omitted.

An upright piece 4 formed by a notch provided on the periphery of the washer 4
A may be an upright piece with a single circumference without notches.

[Effect of idea]

Since the present invention is constructed as described above, even if large vibrations are received, the vibrations are damped by the upright piece of the washer that prevents the rubber bushing from falling off, so even if the clearance between the bottom surface of the disk and the top surface of the lifter is small, the disk will not be scratched. It is possible to provide a vibration isolating structure for a disk player which has excellent practical effects such as being prevented from being attached and being able to be made thinner.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
3 is an enlarged cross-sectional side view of a main part of the vibration isolation structure of the disk player, and FIG. 4 is a back view of a loading case incorporating a lifter and a slider. 1... Chassis, 2... Loading case,
3... Rubber button, 3a... Body, 3c... Annular groove, 3d... Collar, 4... Washer, 4a... Upright piece, 5... Lifter, 11... Support, 12...
Fixing screw, 13...Main plate, 14...Spindle motor, 15...Spindle hub, 17...Disk.

Claims (1)

[Scope of utility model registration request] A lifter that moves up and down to load a disk onto a spindle hub, a chassis that slidably holds a loading case fitted with this lifter, a column that is fixed to this chassis, and a column that is inserted through this column. The rubber bushing is equipped with a rubber bushing in which a base plate to which a spindle motor or the like is fixed is locked in an annular groove formed in the body, and a fixing screw threaded onto the pillar to prevent the rubber bushing from falling off via a washer. A large-diameter collar is formed below the annular groove, and an upright piece is formed on the periphery of the washer, and a clearance A between the lower surface of the disk and the upper surface of the lifter in the loaded state allows the collar to be connected to the upper surface of the lifter. A vibration-proof structure for a disk player, characterized in that a clearance B between the upright piece and the lifter is reduced to prevent contact between the disk and the lifter due to vibrations, etc.