JPH07287910A - Turntable device - Google Patents

Abstract

PURPOSE:To fix a disk by clamping it to a turntable with a pressing device. CONSTITUTION:A discoid turntable 1 fitted to a spindle 5 is provided with a recessed part 7 in the middle. The end part of the spindle 5 projected out through the center of the recessed part 7 is loosely fitted into a central hole of a turntable boss part 2 of a cylindrical shape having a V-groove 8 around the side surface and also having a stopper (protruded) part 9 in conformity with the center of the lower surface. Consequently, the turntable boss part 2 is vertically moved along the spindle 5. The stopper part 9 is provided to be engaged with one end of a spring 6, and the other end of the spring 6 is fixed to a bottom part of the recessed part 7 of the turntable 1. Then, a periphery of the recessed part 7 is provided with one pressing device 3 of an L-shape to be turned in the middle part at each position of three equally divided parts of the periphery respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable device such as a CD (compact disc) player capable of securely fixing a disc to a turntable.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a turntable device such as a CD player is provided with a disc-shaped turntable 11 at the tip of a spindle 15 and a cylindrical turntable at the center of the turntable 11. The table boss portion 12 was provided so as to project. To mount the disc on the turntable device, a hole provided at the center of a CD (40) or the like is inserted into the turntable boss 12 provided so as to be slightly press-fitted. Then,
Around the turntable boss portion 12, for example, three balls 13 provided at positions that divide the turntable boss portion 12 are retracted in accordance with the press-fitting, and the stress 17 of the spring 16 connected to the rear portion of each ball 13 causes Since the side wall of the central hole of the CD (40) is pushed, the CD (40) is in a state of being pushed outward evenly at the three equal positions, and the turntable 1
It is fixed at 1.

However, the side surface of the center hole of the CD (40) does not become a vertical side surface but becomes an inclined surface that opens slightly upward due to variations in manufacturing due to, for example, the die taper. There is. At this time, in the above-mentioned ball fixing method, the force of the ball 13 pushing vertically the side surface of the center hole of the CD (40) produces a component force acting upward along the slope, and therefore the CD (40). Does not work effectively as a force to fix the. Therefore, when the turntable 14 rotates, a problem arises in that the imperfectly fixed disk spins idle.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a turntable device which can be securely fixed to a turntable even when a disc having a shape deviating from the standard is mounted. To aim.

[0005]

In order to achieve the above object, a turntable device equipped with a turntable mounted on a spindle and a locking tool provided on the turntable for fixing and rotating a mounted disk is provided. A turntable boss portion which is cylindrical and has a V-shaped groove having at least one inclined surface around its side surface, and is provided so that a spindle protruding from the center of the turntable is loosely fitted into a hole provided at the center thereof. A spring provided between the turntable boss and the bottom surface of the turntable boss, and a plurality of fasteners that surround the turntable boss and are installed on the turntable so as to rotate at the center.
The fixture rotates in response to the movement of the turntable boss in the spindle direction.

[0006]

With the above construction, when mounting or removing the disc to or from the turntable, the turntable boss is pressed along the spindle to move it toward the inside of the recess provided in the center of the turntable, and the V-shape is formed. The disc can be attached and detached by pushing the force point of the fixture downward by the upper wall of the groove and releasing the state where the action point of the fixture pinches the disc with the turntable. When fixing the disc to the turntable, mount the disc in the above state and stop the pressing of the turntable boss, so that the turntable boss is urged by the spring to move the disc in a predetermined direction outward of the recess. Return to the position. At that time, the lower wall of the V-shaped groove pushes the force point of the fixture upward, so that the disk is sandwiched between the turntable and the action point of the fixture and fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A turntable device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is an embodiment of a turntable device according to the present invention. In addition, FIGS. 1B and 1C are enlarged views of a main part taken along the line AB of FIG. 1A. Reference numeral 1 is a disk-shaped turntable attached to a spindle 5, and a cylindrical recess 7 is provided in the center.
V with a cylindrical shape and at least one bevel around the side
Turntable boss 2 having a groove 8 and a hole at the center
Is a state in which the end of the spindle 5 protruding through the center of the recess 7 is loosely fitted in the center hole, and
Is installed inside. Further, the turntable boss portion 2 is provided with, for example, a cylindrical stopper (convex) portion 9 in the center of the lower surface and moves in the direction of the spindle 5. In addition, one end of the spring 6 is fitted and fixed to the stopper portion 9, and the other end is fixed to the bottom portion of the concave portion 7 of the turntable 1, and the periphery of the concave portion 7 is divided into three equal parts. A support base 33 is provided on the above, and one L-shaped pressing tool 3 is provided on the support base 33 so as to rotate in the central portion.

The operation of attaching and detaching the disk and fixing the disk in the turntable device according to the present invention will be described with reference to FIGS. 1 and 3. When the disc is attached to or detached from the turntable, the turntable boss portion 2 is pushed down against the stress of the spring 6 along the spindle as shown in FIG. Inside the recess 7
The stopper (convex) portion 9 is moved downward until it contacts the bottom of the concave portion 7. At this time, turntable boss 2
The upper wall of the V-shaped groove 8 provided around the side surface of the lower side pushes down the starting point of the L-shaped pressing tool 3. However, as shown in FIG. 3, in the holding tool 3, a main body having an L-shaped cross section made of an elastic member is rotated on a support base 33 provided on the turntable boss portion 2 and having a predetermined height. It is a structure attached so that Explaining each part in detail, the L-shaped part has a shape in which a force point portion (start point) 31 and an action point portion (end point) 32 are opened and fixed at an angle of approximately 90 degrees, and the force point portion 31 is an end portion. Is provided with a portion that bends outward, and is mounted so as to rotate via a hinge portion 34 on a support base 33 provided on the peripheral edge of the recess 7 of the turntable 1.
Therefore, as described above, when the force point portion (starting point) 31 is pushed down, the action point portion 32 rotates upward about the hinge portion 34, as shown in FIG.
The state of pressing the disc 4 or the turntable 1 is released. The disc 4 can be attached and detached only when the pressing tool 3 is in the released state.

When fixing the disc 4 to the turntable 1, mount the disc 4 in the above state,
By stopping the pressing of the turntable boss portion 2, the turntable boss portion 2 is moved to a predetermined upper position and stabilized by the stress of the spring 6. At this time, the lower wall (slope) of the V-shaped groove 8 provided around the side surface of the turntable boss portion 2 has an L-shaped pressing member 3 (starting point).
Push up 31. However, since the pressing tool 3 is configured as shown in FIG. 3, by pushing up the force point portion 31, the action point portion 32 is centered on the hinge portion 34 as shown in (b) of FIG. The disc 4 is rotated to move downward, and the disc 4 is pressed against the turntable 1 so as to be sandwiched and fixed. As shown in FIG. 4 (a), even if the shape of the pressing tool 3 is a V shape, the same effect as that of the L-shaped pressing tool 3 described above can be obtained. In addition, the pressing member 3 is connected to the turntable 1 via the support base 33 described above.
Instead of being mounted on the turntable 1, the shape shown in (b) and (c) of FIG. 4 may be directly mounted on the turntable 1. In addition, the end portion of the force point portion (starting point) 31 of the pressing tool 3 shown in (b) and (c) of FIG. 4 may be bent inward (upward in the drawing) at a predetermined angle. By having a shape,
Since the state shown in FIG. 1C can be realized, it is easy to insert the disc.

FIG. 2 is another embodiment of the turntable device according to the present invention, and is an enlarged view of a main part of the AB cross section of FIG. The same parts as those in FIG. 1 are designated by the same numbers,
The description is omitted. 19 is the turntable boss 2
A groove provided on the periphery of the side surface of the pressing member 3 at the bottom of the entrance of the groove 19 so as to rotate via the hinge portion 34.
Is provided. Further, the pressing tool 3 is urged by a pressing tool spring having one end fixed to the bottom of the groove 19 and the other end fixed to the force point portion 31 of the pressing tool 3. In addition, on the periphery of the concave portion 7 of the turntable 1,
As a guide when the center hole of the disc is mounted on the turntable 1, a protrusion having a narrowed tip and a smooth side surface or a disc guide 20 formed of a circumferential wall may be provided to facilitate the insertion of the disc.

The operation of another embodiment of the turntable device according to the present invention will be described with reference to FIGS. When the disc is attached to or detached from the turntable, as shown in FIG. 2E, the turntable boss portion 2 is pressed against the stress of the spring 6, and the inside of the concave portion 7 provided in the center of the turntable 1 is depressed. Then, the stopper (convex) portion 9 is moved downward until it contacts the bottom of the concave portion 7. At this time, the wall around the recess 7 of the turntable 1 and the inner wall of the disc guide 20 push up the action point portion 32 of the L-shaped pressing member 3. The retainer 3 is housed inside the groove 18 while compressing the retainer spring 19 fixed to the force point portion 31, and the disc 4 can be attached and detached. Also, turntable 1 to disc 4
When fixing the disk, the disk 4 is mounted in the above state and the turntable boss portion 2 is stopped from being pushed, so that the turntable boss portion 2 is moved to a predetermined upper position by the stress of the spring 6. Stabilize. At this time,
The retainer 3 housed inside the groove 18 provided around the side surface of the turntable boss 2 is the retainer spring 1
The stress point 9 pushes the force point portion 31 outward, and as shown in FIG. 2D, the action point portion 32 rotates around the hinge portion 34 and moves downward to push the disk 4 onto the turntable 1. Secure by pinching. Incidentally, the pressing tool 3 does not necessarily have to be installed on the support base 33 shown in FIG. 3, and in this case, it is directly attached to the bottom of the entrance of the groove 19 via the hinge portion 34 so as to rotate.

The installation position and the number of the pressing members 3 are as follows.
As described in the above-described two embodiments, it is not necessary to limit the installation to each position of the trisecting point of the circumference, and for example, to install each of the quadrangular positions around the recess 7 or the groove 18. One may be installed for each of the four inner quadrants. Further, a member having a large friction coefficient, such as rubber, may be attached to the lower surface of the action point portion 32 of the retainer 3. Also,
The tip of the action point portion 32 may be bent inward in the L shape to facilitate the mounting of the disc 4 on the turntable 1.

[0013]

As described above, the present invention provides a turntable device which can be securely fixed to a turntable even when a disc having a shape deviating from the standard is mounted. Therefore, the shape of the hole in the center of the CD is uneven due to manufacturing,
It does not have a standard shape, and therefore has the advantage of being able to solve the problem of the disk spinning when the turntable rotates. Further, since the present invention can be realized by a simple mechanism, it can be commercialized at a low price.

[Brief description of drawings]

FIG. 1 is an embodiment of a turntable device according to the present invention.

FIG. 2 is another embodiment of the turntable device according to the present invention.

FIG. 3 is a detailed explanatory view of a presser for the turntable device according to the present invention.

FIG. 4 is another embodiment of a presser for a turntable device according to the present invention.

FIG. 5 is an example of a conventional turntable device.

[Explanation of symbols]

 1 Turntable 2 Turntable Boss 3 Presser 4 Disc 5 Spindle 6 Spring 7 Recess 8 V Groove 9 Stopper (Convex) 11 Turntable 12 Turntable Boss 13 Ball 15 Spindle 16 Spring 17 Stress 18 U Groove 19 Presser Spring 20 Disk guide 31 Force point part (start point) 32 Action point part (end point) 33 Support base 34 Hinge part 40 CD

Claims (12)

[Claims] 1. A turntable device, comprising: a turntable mounted on a spindle; and a locking tool provided on the turntable, for fixing and rotating a mounted disc, wherein the turntable device is cylindrical and has at least one periphery around its side surface. A turntable boss provided with a V-shaped groove having an inclined surface and a spindle projecting from the center of the turntable loosely fitted in a hole provided at the center of the turntable, a bottom surface of the turntable boss, and the turntable. A spring provided between them, and a plurality of fixtures that surround the turntable boss portion and are installed so as to rotate on the turntable at the central portion, in response to movement of the turntable boss portion in the spindle direction, A turntable device characterized in that the fixture is rotated by the force from the side surface of the V-shaped groove. 2. The turntable device according to claim 1, further comprising a support base for attaching a fixture to the turntable. 3. The turntable device according to claim 1, wherein the fixture has an L-shaped cross section and is formed of an elastic member. 4. The turntable device according to claim 3, wherein an L-shaped starting point of the fixture is bent outward at a predetermined angle. 5. The turntable device according to claim 3, wherein a member having a large friction coefficient is attached to the lower surface of the L-shaped end point of the fixture. 6. The turntable device according to claim 3, wherein the L-shaped end point of the fixture is bent inward at a predetermined angle. 7. The fixing device has a cross-section of a V shape,
The turntable device according to claim 1, wherein the turntable device is formed of an elastic member. 8. A turntable device comprising a turntable attached to a spindle and a locking tool provided on the turntable for fixing and rotating a mounted disc, which is cylindrical and has a groove around its side surface. , A turntable boss installed by loosely fitting a spindle protruding from the center of the turntable into a hole provided in the center, a spring provided between the bottom of the turntable boss and the turntable, and A turntable characterized by comprising a plurality of fixtures installed in the groove of the turntable boss so as to rotate in the central part, and the fixture being rotated in response to movement of the turntable boss in the spindle direction. Table device. 9. The turntable device according to claim 8, wherein the fixing member is attached to a wall of an entrance of the groove of the turntable boss portion so as to rotate in a central portion. 10. The turntable device according to claim 8, wherein the fixture has an L-shaped cross section and is formed of an elastic member. 11. The turntable device according to claim 8, wherein protrusions are provided on the turntable in correspondence with the positions of the fixtures. 12. The turntable device according to claim 8, wherein a wall is provided around the periphery of the recess of the turntable.