JP3157993B2 - Disk rotation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk rotating mechanism in various disk devices such as a CD and an LD.

[0002]

2. Description of the Related Art Conventionally, as a disk rotating mechanism of various disk devices generally used, a disk holder provided separately from a turntable is moved in the direction of the turntable to be mounted on the turntable. A mechanism that presses and holds the disk against the mounting surface of the turntable, and a member that interlocks with the mounting of the disk is provided on the turntable. With the mounting of the disk, the interlocking member places the disk on the mounting surface of the turntable. And a mechanism for holding the disc by pressing the disc.

The former disk rotating mechanism is generally used for products that do not require extremely small size, such as a CD radio cassette and a disk changer, and the latter disk rotating mechanism is generally used for portable disk players. As described above, it has been used for a device that needs to be miniaturized and also to prevent a disc from falling off when being carried.

Therefore, the latter disk rotating device will be described with reference to FIGS.

First, as a first conventional example, FIGS.
8 will be described.

In FIGS. 15 to 18, reference numeral 11 denotes a disk, 12 denotes a ball which presses and holds the disk 11 against a mounting surface 13a of a turntable 13, and 13 denotes a mounting surface 13a.
And a cap 14 is provided at the center of the upper surface. A ball storage portion 14a having an opening having a diameter smaller than the diameter of the ball 12 is formed at the outer peripheral edge of the cap 14, and the ball storage portion 14a
The ball 12 housed in the inside is urged outward by a ring-shaped rubber 15 from the inside.

That is, the ball 12 is partially part of the ball storage unit 1.
4a, it is always urged outward in a state protruding from the opening, and is movably provided with elasticity in the radial direction from the rotation center of the turntable 13, and is placed in the cap 14 against the urging force of the ring-shaped rubber 15. It is configured to be stored.

The ball housings 14a are formed at three positions at intervals of 120 degrees, and the balls 12 are housed in each of them with the bias of a ring-shaped rubber 15.

In the disk rotating mechanism configured as described above, the mounting of the disk 11 on the turntable 13 will be described first.

Before the disk 11 is mounted on the turntable 13, the cap 1 is pressed by the urging force of the ring-shaped rubber 15.
In this state, a part of the ball 12 protrudes from the opening of the ball storage portion 14a.

In this state, when the inner periphery of the disk 11 is placed on the outer periphery of the cap 14, the lower surface of the inner peripheral edge of the disk 11 comes into contact with the upper surface of the ball 12 protruding from the opening of the ball storage portion 14a. When the disk 11 is pressed downward in this contact state, the pressing force causes the ball 12 to be housed inward against the urging force of the ring-shaped rubber 15, whereby the disk 11 can be moved downward. Becomes When the disc 11 is mounted on the mounting surface 13a of the turntable 13 by moving the disc 11 downward, the pressing force of the disc 11 accompanying the downward pressing is released, and the ball 12 is attached to the ring-shaped rubber 15. The force returns to a state where a part thereof projects from the opening of the ball storage portion 14a.

The lower surface of the protruding ball 12 abuts on the upper surface of the inner peripheral edge of the disk 11, and the disk 11 is pressed and held on the mounting surface 13 a of the turntable 13 by the abutment.

Next, the ejection of the disk 11 mounted on the turntable 13 will be described.

When the disk 11 is moved upward in a state where the disk 11 is pressed and held on the mounting surface 13a of the turntable 13 by the lower surface of the ball 12 protruding from the ball storage portion 14a, the pressing force accompanying the movement is Therefore, the ball 12 is housed inwardly against the urging force of the ring-shaped rubber 15, whereby the disk 11 can be moved upward, and the disk 11 is then moved upward by the upward movement. More released.

The disk 11 is mounted on the turntable 1
When ejected from the disc 3, the disc 1 accompanying the upward movement
The pressing force of 1 is released, and the ball 12 returns to a state in which a part thereof protrudes from the opening of the ball storage portion 14a by the urging force of the ring-shaped rubber 15.

Therefore, according to the above-described disk rotating mechanism, the disk 11 is mounted on the mounting surface 1 of the turntable 13.
The disc 11 can be loaded while being pressed and held, and can be released by moving the disc 11 upward when the disc 11 is loaded.

Next, as a second conventional example, FIGS.
4 will be described.

19 to 24, 21 is a disk, 22 is a ball for pressing the disk 21 against a mounting surface 23a of a turntable 23, and 23 is a mounting surface 23a.
And a cap 24 is provided at the center of the upper surface. Further, a ball storage portion 24a having an opening having a diameter smaller than the diameter of the ball 22 and a detachable claw storage portion 24b having an opening from which one end of the detachable claw 25 projects are formed at the outer peripheral edge of the cap 24. A release button storage portion 27c having an opening in which the upper surface of the release button 27 is arranged is formed at the center.

Reference numeral 25 denotes a detachable claw formed in a substantially L-shape by an operating arm 25b and a pressing arm 25c, which is attached to the cap 24 so as to be able to rotate vertically with a curved portion as a fulcrum 25a. Is the removable claw storage section 24b
The pressing arm 25c is urged in a predetermined direction by a pressing spring 26. 26 is a pressing spring,
The operation arm 24b of the attachment / detachment claw 25 is held in a downward rotation end position (first position) around the fulcrum 24a (first position) and an upward rotation end position (second position) in the holding direction. The slope to be acted on is formed with elasticity.

Reference numeral 27 denotes a release button which is attached to the center of the top surface of the cap 24 while being constantly urged upward by the coil spring 28. The operation surface is pressed downward against the urging force of the coil spring 28. 27a, an urging portion 27b formed of a slope which applies the urging force of the coil spring 28 to the ball 22 accommodated in the ball accommodating portion 24a from the inner side to the outer side, and the pressing arm 25c of the detachable claw 25 by the pressing spring 2a.
And a pressing portion 27c for forcibly turning downward against the holding force of No. 6 and for turning the operation arm 24b upward around the fulcrum 24a.

That is, a part of the ball 22 is in the ball storage unit 2.
4a is always urged outward in a state protruding from the opening of the turntable 2a, and along the slope of the urging portion 27b.
3 is provided movably in the radial direction of the center of rotation,
It is configured to be housed in the cap 24 against the urging force of the coil spring 28.

The ball storage portions 24a are formed at three positions at 120-degree intervals, and the balls 22 are stored in the respective portions with the slopes of the urging portions 27b of the release buttons 27, and the removable claw storage portions 24b are stored in the ball storage portions 24a. On the other hand, three places are formed at intervals of 60 degrees, and a detachable claw 25 is provided on each of the three places.

In the disk rotating mechanism configured as described above, the mounting of the disk 21 on the turntable 23 will be described first.

Before the disk 21 is mounted on the turntable 23, the biasing force of the coil spring 28 acts outwardly with respect to the center of rotation of the turntable 23 due to the slope of the biasing portion 27b of the release button 27, and the ball storage portion of the cap 24. A part of the ball 22 protrudes from the opening 24a, and the operating arm 25b of the detachable claw 25 is held at the second position by the pressing spring 26.

In this state, when the inner periphery of the disk 21 is placed on the outer periphery of the cap 24, the lower surface of the inner peripheral edge of the disk 21 comes into contact with the upper surface of the ball 22 projecting from the opening of the ball storage portion 24a. It comes into contact with the top end of the operation arm 25b. When the disc 21 is pressed downward in this abutting state, the pressing force causes the ball 22 to be housed inward along the slope of the urging portion 27 b of the release button 27, and the operating arm 2 of the detachable claw 25.
5b rotates downward about the fulcrum 25a. At this time, the release button 27 moves downward against the urging force of the coil spring 28.

Then, with the storage of the ball 22, the disk 21 can be moved downward. Then, the turntable 2 is moved by the downward movement of the disk 21.
3, the pressing force of the disk 21 accompanying the downward pressing is released, the release button 27 returns to the original position, and the detachable claw 25 moves to the second position. , Held by the pressing spring 26.

The lower surface of the protruding ball 22 abuts on the upper surface of the inner peripheral edge of the disk 21, and the disk 21 is pressed and held on the mounting surface 23 a of the turntable 23 by the abutment.

Next, the ejection of the disk 21 mounted on the turntable 23 will be described.

The disk 21 is pressed and held on the mounting surface 23a of the turntable 23 by the lower surface of the ball 22 protruding from the opening of the ball storage portion 24a.
Is held at the second position, when the operation surface 27a of the release button 27 is pressed and moved downward against the urging force of the coil spring 28, the urging portion 27b of the release button 27 moves downward. The ball 22 moves with the movement.
Is housed inward along the slope of the urging portion 27b.
Further, the pressing portion 27c of the release button 27 also moves downward,
With this movement, the pressing portion 27c of the release button 27 comes into contact with the pressing arm 25c of the attaching / detaching claw 25, and the downward movement of the pressing arm 25c causes the pressing arm 25c to pivot downward about the fulcrum 25a.

On the other hand, as the ball 22 is stored,
1 can be moved in the vertical direction, and the operating arm 25b rotates upward about the fulcrum 25a with the rotation of the pressing arm 25c. Then, the upper end of the upper surface of the operation arm 25b contacts the lower surface of the inner peripheral edge of the disk 21, and the disk 21 is pushed upward by the subsequent upward movement. At this time, the disk 21 is discharged upward without any resistance because the ball 22 is stored.

When the attachment / detachment claw 25 is moved to the second position, the urging force of the pressing spring 26 acts in the holding direction. In this state, when the downward pressing of the release button 27 on the operation surface 27a is released, The release button 27 is returned upward by the urging force of the coil spring 28. With the upward return, the urging portion 27b moves upward, and the slope of the urging portion 27b causes the ball 22 to return to a state in which the ball 22 projects from the opening of the ball storage portion 24a. The pressing portion 27c also moves upward, but the detachable claw 25 is held at the second position by the pressing spring 26.

Therefore, according to the above-described disk rotating mechanism, the disk 21 is mounted on the mounting surface 2 of the turntable 23.
The disc 21 can be ejected by pressing and holding the release button 27 downward when the disc 21 is loaded.

[0033]

However, in the above-mentioned conventional apparatus, in the first conventional example, the ball is always urged outward, and even when the disc is manually ejected, the ball is urged outward. ing. Therefore, the disc is ejected against this urging force, and the disc is peeled off from the turntable, and an excessive force is applied to the disc, which may cause the disc to be warped and damaged. was there.

In the second conventional example, when the disc is ejected, the disc is ejected by the detachable claw in a state where the outward bias of the ball is released, so that no excessive force is applied to the disc. However, it requires a ball for holding the disk and a detachable claw for releasing the disk, which has the problem of increasing the number of parts and complicating the configuration. There is a problem that a greater force is required when the disc is ejected and when the disc is ejected.

An object of the present invention is to provide a disk rotating mechanism capable of mounting a disk on a turntable with a simple structure, and preventing the disk from being warped or damaged when the disk is ejected. Things.

[0036]

To achieve the above object, according to the solution to ## invention of claim 1, wherein, in the disk rotating mechanism that rotates together with the turntable mounting the disk on the turntable, the around the fulcrum Turntable
Up and down with respect to the
While being slidably attached to the center of rotation,
One end about the fulcrum is located on the receiving piece and above it.
In addition, a detent piece having a spherical shape centered on a fulcrum on the upper surface
A plurality of disc holding levers, a first position for holding the inner peripheral edge of the disc between the receiving piece and the restraining piece, and an upward rotation from the first position. A lever holding means for selectively holding the disk inner peripheral edge at a second position for releasing the holding of the inner peripheral edge of the disk, and a locking member for holding the disk when the disk holding lever is at the first position .
The disk holding lever is moved inward with the downward pressing on the upper surface , and the disk holding lever returns to the first position with the release of the pressing on the upper surface of the restraining piece. The disk holding lever has a structure in which the disk is mounted on the turntable at the first position.

According to a second aspect of the present invention, the lever holding means allows the disk holding lever to move from the second position to the first position in response to the downward pressing of the receiving piece, and An operation body for forcibly returning the holding lever from the first position to the second position is provided.

According to a third aspect of the present invention, the lever holding means includes an operating portion with which one end of the disk holding lever contacts, and an urging means for urging the operating portion in one direction. A slope formed to act on the urging means in the first direction and the second position of the disk holding lever in the holding direction, respectively.

[0039]

According to a fourth aspect of the present invention, the guide means is provided so that the disc holding lever is moved downward when the disc holding lever is in the first position and is pressed down against the upper surface of the restraining piece. Locking means for preventing the rotation of the disk holding lever, and changing the rotation power into an upward moving force to move the disk holding lever upward.

[0041]

According to the first aspect of the present invention, when the disk holding lever is held at the second position by the lever holding means, the inner peripheral edge of the disk is placed on the receiving piece, and the disk holding lever is moved to the second position. By rotating from the position 2 to the first position, the disk can be mounted on the turntable while holding the inner peripheral edge of the disk between the receiving piece and the restraining piece at the first position. The disk holding lever is rotated from the first position to the second position to release and release the inner peripheral edge of the disk at the second position, while holding the disk by the lever holding means. Holding the lever in the first position, and
When the disc inner peripheral edge is not held between the receiving piece and the restraining piece at the position of, the disc inner peripheral edge is placed on the upper surface of the restraining piece and pressed downward, and the guide means holds the disc. Moving the disk to the disk mounting position by moving the lever inward from the first position, and then returning the disk holding lever to the first position with the release of the pressing of the restraining piece against the upper surface; Thus, the inner peripheral edge of the disc can be held between the receiving piece and the inhibiting piece of the disc holding lever and held on the turntable.

According to the second aspect of the present invention, the disk holding lever is allowed to move from the second position to the first position in accordance with the downward pressing of the disk holding lever against the receiving piece, so that the first position is maintained. The disk inner lever can be mounted on the turntable while holding the inner peripheral edge of the disk between the receiving piece and the restraining piece at the position, and the disk holding lever is forcibly moved from the first position to the second position by operating the operating body. By releasing the disk, the inner peripheral edge of the disk can be released and released at the second position, and the disk can be released from the turntable by operating the operating body.

According to the third aspect of the present invention, the lever holding means is provided with an operating portion with which one end of the disk holding lever abuts,
The operating portion is constituted by biasing means for biasing in one direction, while the operating portion is formed with a slope, whereby the biasing force of the biasing means is reduced by the slope to move the disk holding lever between the first position and the first position. 2 can act in the holding direction.

[0044]

According to the fourth aspect of the present invention, when the disk holding lever is held at the first position in a state where the disk is not held, the inner peripheral edge of the disk is formed on the upper surface of the stopper of the disk holding lever. The guide means moves the disc holding lever to the first position as the disc is placed and pressed downward.
When moving inward from the position of, the locking means prevents the downward rotation of the disc holding lever,
And the turning power is changed to an upward moving force and the disk holding lever is moved upward, so that the disc holding lever restraining piece is located on the upper surface of the inner peripheral edge of the disk before the disk is mounted on the disk, The inner peripheral edge of the disc can be reliably held between the receiving piece and the restraining piece of the disc holding lever.

[0046]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[0047] Figure 1 is a perspective view showing an appearance of a disk rotation mechanism is a prerequisite technology of the present invention, FIG 2 is a side sectional view showing a front disk mounting in the disk rotating mechanism which is underlying technique of the present invention, FIG. 3 is the same FIG. 4 is a side sectional view showing a main part of the disk rotating mechanism before a disk is mounted, FIG. 4 is a side sectional view showing a disk mounted state in the disk rotating mechanism, and FIG.
FIG. 6 is a side sectional view showing a main part of the disk rotating mechanism in a disk mounted state, FIG. 6 is a side sectional view showing a disk releasing state of the disk rotating mechanism, and FIG. 7 is a disk in a disk rotating mechanism according to an embodiment of the present invention. FIG. 8 is a cross-sectional view showing a main part of the disk rotating mechanism before mounting a disk, FIG. 9 is a side cross-sectional view showing a disk mounting state of the disk rotating mechanism, and FIG. FIG. 11 is a side sectional view showing a main part of the mechanism in a disk mounted state, FIG. 11 is a side sectional view showing a disk ejected state in the disk rotating mechanism, and FIGS. 12 and 13 are side sectional views showing a disk mounting process in the disk rotating mechanism. FIG. 12A shows a state before the disk is mounted, and FIGS. 12B and 12C and FIGS. 13A and 13B.
13 (c) shows a state after the disk is mounted, and FIG. 13 (c) shows a state after the disk is mounted. FIG. 14 is a side sectional view showing a main part of FIG. 12 (a).

[Base Technology ] In FIGS. 1 to 6, reference numeral 1 denotes a disk, and 2 denotes a mounting surface 2a.
Is a cap provided in the center of the upper surface of the turntable 2. A clamp arm housing 3a having an opening from which one end of a clamp arm (disc holding lever) 4 protrudes is provided on the outer peripheral edge thereof. And
A release button housing 3b having an opening in which the upper surface of the release button 5 (operation body) is arranged is provided at the center of the upper surface.

Reference numeral 4 denotes a clamp arm which is attached to the cap 3 so as to be rotatable up and down about the fulcrum 4a. One end of the clamp arm about the fulcrum 4a is formed by a receiving piece 4b and a restraining piece 4c located above the receiving piece 4b. It is formed in a substantially U-shape, and the other end is formed by a pressing piece 4d provided in parallel with the receiving piece 4b and the suppressing piece 4c. At one end having a substantially U-shape, the receiving piece 4b and the restraining piece 4c protrude from the opening of the clamp arm storage portion 3a at the downward rotation end position (first position) of the clamp arm 4, and the clamp arm At the rotation end position (second position) of the upward rotation 4, only the receiving piece 4 b is configured to protrude from the opening of the clamp arm storage portion 3 a.

A release button 5 is attached to the opening of the release button storage portion 3b of the cap 3 while being constantly urged upward by the coil spring 6, and is pressed downward against the urging force of the coil spring 6. And a pressing portion 5b for rotating the pressing piece 4d at the other end of the clamp arm 4 downward and rotating the one end in a substantially U-shape upward about the fulcrum 4a. The cap 3 is held in a non-detachable state by a hinge portion 5c abutting on the back surface side of the cap 3.

Reference numeral 7 denotes an operating member (operating portion) which is attached while being constantly urged upward by a coil spring 8 (urging means), and a pressing piece 4d at the other end of the clamp arm 4.
A slope 7a is formed which abuts on the tip and applies the urging force of the coil spring 8 in the holding direction at the first position and the second position, respectively, at the first position and the second position. Lever holding means is configured.

It should be noted that the clamp arm storage section 3a has 120
Formed at three intervals, each with a clamp arm 4
Are attached to the cap 3 so as to be vertically rotatable. In the disk rotating mechanism configured as described above, first, mounting of the disk 1 on the turntable 2 will be described.

Before the disk 1 is mounted on the turntable 2, one end of the clamp arm 4 which is formed in a substantially U-shape is held at the second position, and the receiving piece 4b protrudes from the opening of the clamp arm storage portion 3a. It is in a state. At this time, as shown in FIG. 3, the clamp arm 4 receives a force in the direction perpendicular to the slope 7a of the operating member 7 as the urging force of the coil spring 8, and the component force becomes the force in the directions of arrows S and T. . Then, the clamp arm 4 is urged in the holding direction by the component force in the direction of the arrow T.

In this state, when the inner periphery of the disk 1 is placed with the outer periphery of the cap 3, the lower surface of the inner peripheral edge of the disk 1 comes into contact with the top end of the upper surface of the receiving piece 4 b projecting from the opening of the clamp arm housing 3 a. When the disc 1 is pressed downward in this contact state, the pressing force causes the substantially U-shaped end of the clamp arm 4 to move downward about the fulcrum 4a against the urging force in the holding direction. Rotate.

When the lower surface of the restraining piece 4c is positioned on the upper surface of the inner peripheral edge of the disk 1 with the rotation thereof, and the clamp arm 4 moves to the first position, the clamp arm storage 3
The receiving piece 4b and the restraining piece 4c protrude from the opening a, so that the inner circumference of the disk 1 is held between the receiving piece 4b and the restraining piece 4c. At this time, as shown in FIG. 5, the clamp arm 4 receives a force in the direction perpendicular to the slope 7a of the operating member 7 as the urging force of the coil spring 8, and the component force is the force in the directions of arrows S 'and T'. Becomes Then, the clamp arm 4 is urged in the holding direction by the component force in the direction of the arrow T '.

When the lower surface of the stopper 4c contacts the upper surface of the inner peripheral edge of the disk 1, the disk 1 is pressed and held on the mounting surface 2a of the turntable 2, and
Is completed.

Next, the ejection of the disc 1 mounted on the turntable 2 will be described.

When the disk 1 is pressed and held on the mounting surface 2a of the turntable 2 by the lower surface of the restraining piece 4c of the clamp arm 4 projecting from the opening of the clamp arm storage portion 3a, the operating surface 5a of the release button 5 Is pressed and moved downward against the bias of the coil spring 6,
The pressing portion 5b moves downward, contacts the upper surface of the pressing piece 4d at the other end of the clamp arm 4 with the movement, and then moves downward to rotate the pressing piece 4d downward about the fulcrum 4a. Move.

On the other hand, as the pressing piece 4d rotates downward, the receiving piece 4b at one end of the clamp arm 4 and the restraining piece 4c rotate upward about the fulcrum 4a. Then, the pressing and holding of the disc 1 on the mounting surface 2a of the turntable 2 by the lower surface of the restraining piece 4c is released, and the upper end of the receiving piece 4b comes into contact with the lower surface of the inner peripheral edge of the disc 1 and then moves upward. The disk 1 is pushed upward in accordance with the rotation toward. At this time, the disc 1 is ejected upward without any resistance because the restraining piece 4c is accommodated in the clamp arm accommodating portion 3a of the cap 3 with the upward rotation.

Then, when the clamp arm 4 is moved to the second position, the biasing force of the coil spring 8 acts in the holding direction by the inclined surface 7a of the operating member 7, and in this state, the downward direction of the operating surface 5a of the release button 5 When you release the pressure on
The release button 5 is returned upward by the urging force of the coil spring 6. The pressing portion 5b also moves upward, but since the biasing force of the coil spring 8 acts in the holding direction of the clamp arm 4 by the slope 7a of the operating member 7, the receiving piece 4b at one end projects from the clamp arm storage portion 3a. It will be in the state where it was held in the state where it did.

Therefore, according to the disk rotating mechanism as described above, the disk 1 can be pressed and held on the mounting surface 2a of the turntable 2, and when the disk 1 is mounted, the release button 5 is pressed downward. , The disc 1 can be ejected.

[ Embodiment ] In FIGS. 7 to 14, reference numeral 31 denotes a disk, 32 denotes a turntable having a mounting surface 32a, and 33 denotes a cap provided at the center of the upper surface of the turntable 32. Clamp arm (disk holding lever) 34
Arm storage part 3 having an opening at which one end of the arm protrudes
3a is provided, and a release button storage portion 33b having an opening in which the upper surface of the release button 35 (operating body) is disposed at the center of the upper surface is provided. A rotation stopper 33c (locking means) formed in a tapered shape such that the upper surface thereof becomes thinner toward the outside is provided.

Reference numeral 34 denotes a cap 3 centering on a fulcrum 34a.
3 is a clamp arm attached vertically slidably to the turntable 3 and slidable in the direction of the center of rotation of the turntable. a spherical shape centered at the fulcrum 34a to and on the upper surface located in the by the the suppression piece 34e having a disk sliding surface 34d consists, provided parallel to the other end receiving piece 34c and suppression piece 34e And a projecting piece 34g provided above the pressing piece 34f.

At one end centering on the fulcrum 34a , the receiving piece 34c and the restraining piece 34e protrude from the opening of the clamp arm storage portion 33a at the position where the downward rotation of the clamp arm 34 ends (first position). Only the receiving piece 34c projects from the opening of the clamp arm storage portion 33a at the upward rotation end position (second position) of the clamp arm 34.

Reference numeral 35 denotes a release button storage section 3 for the cap 33.
3b is a release button attached to the opening of 3b while being constantly urged upward by the coil spring 36, and is pressed downward against the urging force of the coil spring 36.
5a and the protruding piece 34g at the other end of the clamp arm 34 are pivoted downward so that one end about the fulcrum 34a is
and a pressing portion 35b that pivots upward about a, and is held in a non-detachable state by a hinge portion 35c that abuts on the back surface side of the cap 33.

Reference numeral 37 denotes an operating member (operating portion) which is attached while being constantly urged upward by a coil spring 38 (urging means). Slopes 37a and 37b are formed to apply the biasing force of the clamp arm 34 in the holding direction at the first position and the second position, respectively. The operating member 37 and the coil spring 38 constitute lever holding means. Have been.

Further, a slide surface 34d formed on the upper surface of the restraining piece 34e of the clamp arm 34, a projection 34b formed on the lower surface of the receiving piece 34b of the clamp arm 34,
The clamp arm 34 is restrained when the clamp arm 34 is at the first position by the tapered portion with which the projection 34b abuts and the outwardly protruding rotation stopper 33c below the clamp arm storage portion 33a. Guide means is provided for changing the pressing force to a force acting in the direction of the rotation center of the turntable in accordance with the downward pressing of the piece 34e.

It should be noted that the clamp arm storage portion 33a
Formed at three intervals, each with a clamp arm 3
4 is attached to the cap 33 so as to be vertically rotatable and slidable in the direction of the turntable rotation center.

In the disk rotating mechanism configured as described above, the mounting of the disk 31 on the turntable 32 will be described first.

[0070] Before mounting the disk 1 on the turntable 32 one end of the clamp arm 34 is held in the second position, receiving the opening of the clamp arm housing section 33a piece 34
c is in a protruding state. At this time, as shown in FIG. 8, the clamp arm 34 receives a force in the direction perpendicular to the slope 37b of the operating member 37 as the urging force of the coil spring 38, and the component force becomes the force in the directions of arrows S and T. . The clamp arm 34 is urged in the holding direction by the component force in the direction of the arrow T.

In this state, when the inner periphery of the disk 31 is placed with the outer periphery of the cap 33, the lower surface of the inner peripheral edge of the disk 31 comes into contact with the tip of the upper surface of the receiving piece 34c protruding from the opening of the clamp arm storage portion 33a. When pressing the disk 31 in this contact state downward pivoted downward to its by the pressing force one end of the clamp arm 34 around the pivot 34a against the urging force of the holding direction.

With the rotation, the lower surface of the restraining piece 34e is positioned on the upper surface of the inner peripheral edge of the disc 31, and when the clamp arm 34 moves to the first position, the receiving piece 34c is moved from the opening of the clamp arm storage portion 33a to the receiving piece 34c. The inhibiting piece 34e protrudes, and the inner periphery of the disk 31 is held between the receiving piece 34c and the inhibiting piece 34e. At this time, the clamp arm 34 acts as an urging force of the coil spring 38 as shown in FIG.
As shown by 0, a force is applied in a direction perpendicular to the slope 37a of the operating member 37, and the component force becomes a force in the directions of arrows S 'and T'. The clamp arm 34 is urged in the holding direction by the component force in the direction of the arrow T '.

The lower surface of the restraining piece 34e is
1 by contacting the upper surface of the inner peripheral edge,
Is pressed and held on the mounting surface 32a of the turntable 32,
The mounting of the disk 31 is completed.

Next, the ejection of the disk 31 mounted on the turntable 32 will be described.

The disk 31 is inserted into the clamp arm storage 33
a of the clamp arm protruding from the opening of FIG.
When the operation surface 35a of the release button 35 is pressed and moved downward against the bias of the coil spring 36 in a state where the operation surface 35a of the release table 35 is pressed and held by the lower surface of the 35b moves downward, and with the movement, the protruding piece 34g at the other end of the clamp arm 34
The protruding piece 34g pivots downward about the fulcrum 34a while the pressing piece 34f moves along the slope 37b and the slope 37a of the operating member 37 in this order by the downward contact with the upper surface.

On the other hand, with the downward rotation of the protruding piece 34g, the receiving piece 34c at one end of the clamp arm 34 and the restraining piece 34
e rotates upward about the fulcrum 34a. Then, the pressing and holding of the disc 31 on the mounting surface 32a of the turntable 32 by the lower surface of the restraining piece 34e is released, and the upper end of the receiving piece 34c abuts on the lower surface of the inner peripheral edge of the disc 31. The disk 31 is pushed upward along with the rotation of the disk 31. At this time, deterrent piece 3
Since the disk 4e is stored in the clamp arm storage portion 33a of the cap 33 with the upward rotation, the disk 31 is discharged upward without any resistance.

Then, when the clamp arm 34 is moved to the second position, the biasing force of the coil spring 38 acts in the holding direction by the inclined surface 37b of the operating member 37, and in this state, the downward direction of the operating surface 35a of the release button 35 When the pressing is released, the release button 35 is returned upward by the urging force of the coil spring 36. The pressing portion 35b also moves upward, but since the biasing force of the coil spring 38 is acting in the holding direction of the clamp arm 34 by the inclined surface 37b of the operating member 37, the receiving piece 34c at one end projects from the clamp arm storage portion 33a. It will be in the state where it was held in the state where it did.

Next, when one or more of the clamp arms 34 are held at the first position without holding the disk 31, the disk 31
Will be described.

[0079] One end of the clamp arm 34 is disk 31
Is held in the first state without holding
The receiving piece 34c and the restraining piece 34e protrude from the opening of the clamp arm storage portion 33a. At this time, as shown in FIG. 14, the clamp arm 34 receives a force in the direction perpendicular to the inclination 17a of the operating member 17 as the urging force of the coil spring 38, and the component force is the force in the directions of arrows S 'and T'. Becomes The clamp arm 34 is constantly urged to rotate in the direction of arrow E about the rotation shaft 34a by the component force in the direction of arrow T ', and the lower surface of the receiving piece 34c of the clamp arm 34 is Abuts on the upper surface and clamp arm 34
The rotation is restricted by the protrusion 34b formed on the lower surface of the receiving piece 34c abutting on the tapered portion of the rotation stopper 33c protruding outward at the lower part of the clamp arm storage portion 33a, thereby restricting the rotation. The clamp arm 34 is urged in the holding direction by the component force.

In this state, when the inner periphery of the disk 31 is placed with the outer periphery of the cap 33 placed thereon, FIG.
As shown in (1), the inner peripheral lower edge of the disk 31 contacts the disk slide surface 34d which is the upper surface of the suppressing piece 34e protruding from the opening of the clamp arm storage portion 33a. When the disc 31 is pressed downward (in the direction of arrow B) in this contact state, the pressing force is increased by the arrow U by the disc slide surface 34g of the clamp arm 34 as shown in FIG.
The force in the direction of the arrow U does not give a rotational moment to the clamp arm 34, so that the force in the direction of the arrow U acts directly on the fulcrum shaft 34a, and the component force is the arrow V, X-direction force.

Then, as shown in FIG. 12B, the pressing piece 3 of the clamp arm 34 is
4f moves along the inclined surface 37a of the operating member 37, so that the pressing piece 34f of the clamp arm 34
At this time, the clamp arm 34 is slid in the direction of arrow D with the fulcrum shaft 34a as a reference, and the clamp arm 34 is moved in the direction of arrow D by the slide movement in the direction of arrow D. As the arm 34 slides in the direction of arrow A, the disk 31 can move downward (in the direction of arrow B), while the rotational force in the direction of arrow E about the fulcrum shaft 34a is received by the clamp arm 34. Projection 3 formed on the lower surface of piece 34c
4b is restricted by contacting the tapered portion of the outwardly protruding rotation stopper 33c at the lower portion of the clamp arm storage portion 33a, so that the clamp arm 34 does not rotate in the direction of arrow E, but instead rotates in the direction of arrow D of the clamp arm 34. As a result, the projection 34b of the clamp arm 34 rides on the tapered portion of the rotation stopper 33c, whereby the clamp arm 34 rotates in the direction of arrow F about the fulcrum shaft 34a.

In this state, when the disc 31 is further pressed downward (in the direction of arrow B), the clamp arm 3
4, regardless of the contact position between the disk 31 and the inner peripheral lower edge of the disk 31 due to the inclination of the disk slide surface 34 d, the pressing force does not give a rotational moment to the clamp arm 34 as a force in the direction of the arrow U, and the fulcrum shaft Working on 34a,
The clamp arm 34 slides in the direction of arrow A in the same manner as described above due to the force in the direction of arrow V as the component force, and the clamp arm 34 rotates in the direction of arrow F about the fulcrum shaft 34a with the slide movement. as a result, as shown in FIG. 12 (c), one end of the clamp arm 34 is being pivoted upward, is housed in the cap 33.

When the disk 31 is pressed downward (in the direction of arrow B), a depressing piece 34e protruding from the lower edge of the inner periphery of the disk 31 and the opening of the clamp arm storage portion 33a.
When the contact with the disk slide surface 34d, which is the upper surface of the disk 31, is released and the inner peripheral surface of the disk 31 comes into contact with the tip of the restraining piece 34e as shown in FIG. Although the force in the direction of arrow U exerted by the inner peripheral lower edge of the clamp arm 34 and the disk sliding surface 31d of the clamp arm 34 is changed to the force exerted by the inner peripheral surface of the disk 31 and the tip of the restraining piece 34e of the clamp arm 34, the force is applied. Is no longer added to the fulcrum shaft 34a than the current state, and accordingly, the movement of the clamp arm 34 in the direction of the arrow D and the arrow F about the fulcrum shaft 34a of the clamp arm 34 as the center.
The rotation in the direction is stopped. Even in this stopped state, the disc 31 is pressed downward (in the direction of arrow B) so that the disc 31 rubs its inner peripheral surface against the tip of the restraining piece 34e and moves downward (in the direction of arrow B). Direction).

When the disk 31 is pressed downward (in the direction of arrow B), the contact state between the inner peripheral surface of the disk 31 and the tip of the restraining piece 34e of the clamp arm is released.
As shown in FIG. 13B, when the tip of the restraining piece 34 e is located above the upper edge of the inner circumference of the disc 31, the action is performed by the inner circumferential surface of the disc 31 and the tip of the restraining piece 34 e of the clamp arm 34. While the force is released, the clamp arm 34 at this time acts as the urging force of the coil spring 38 as shown in FIG.
As shown in FIG. 4, a force is applied in a direction perpendicular to the slope 37a of the operating member 37, and the component force is a force in the directions of the arrows S 'and T'. The component force in the direction of the arrow S ′ is applied to the fulcrum shaft 34a of the clamp arm 34, and becomes a component force in the arrow Y direction and a component force in the arrow W direction at the fulcrum shaft 34a. The clamp arm 34 is about to slide in the direction of arrow C with the fulcrum shaft 34a as a reference, and when the force exerted by the inner peripheral surface of the disc 31 and the tip of the restraining piece 34e of the clamp arm 34 is released, the clamp arm 34 becomes fulcrum. It slides in the direction of arrow C with reference to the shaft 34a.

At this time, the lower surface (disc holding surface) of the restraining piece 34e and the disc sliding surface 34d are formed by directly connecting the tip of the restraining piece 34e of the clamp arm 34 which is in contact with the upper edge of the inner periphery of the disc 31. Instead, the clamp arm 34 is formed through a slope having a predetermined slope toward the fulcrum shaft 34a, so that the clamp arm 34 can be smoothly moved in the direction of arrow C by the slope. Detent piece 34 of arm 34
It is also possible to prevent the tip of e from being damaged.

Then, by the movement of the clamp arm 34 in the direction of the arrow C, the contact between the upper edge of the inner periphery of the disk 31 and the above-mentioned inclined surface is released, and as shown in FIG. When moved to the position, the operating member 3
7 by the force in the direction of the arrow T ′, which is the component of the force in the vertical direction on the slope 37a of the fulcrum 37a.
a about the center of the disk 31, and the rotational moment causes the restraining piece 34 e of the clamp arm 34 to move the upper surface of the inner peripheral edge of the disk 31 to the mounting surface 2 of the turntable 32.
The disk 31 is mounted on the turntable 32 by pressing and holding the disk 31 a.

Before the movement of the clamp arm 34 in the direction of arrow C, the clamp arm 34 rotates in the direction of arrow F about the fulcrum shaft 34a, and the restraining piece 34e is positioned above the first position. Therefore, when the clamp arm 34 moves to the first position due to the movement in the direction of arrow C, the restraining piece 34e of the clamp arm 34
The disc 31 is located above the upper surface of the inner peripheral edge of the disc 1, so that the disc 31 can be stably and reliably mounted on the turntable 32.

Therefore, according to the disk rotating mechanism as described above, regardless of whether the clamp arm 34 is at the first position or the second position, when the clamp arm 34 does not hold the disk 31, The disc 31 can be pressed and held on the mounting surface 32ba of the turntable 32 by the disc mounting operation of
The disc 31 can be ejected by pressing the release button 35 downward when the disc 1 is mounted.

In this embodiment, the mounting of the disc 31 on the turntable 32 when the clamp arm 34 is held at the second position,
Has been described separately from the mounting of the disc 31 on the turntable 32 when the disc 31 is held at the first position without holding the disc 31, but a plurality of clamp arms 34 move the disc 31 to the second position and the disc 31. Similarly, when each of the clamp arms 3 held at the second position is held at the first position without being held,
Reference numeral 4 denotes a disk mounting operation corresponding to the state, and the clamp arm 34 held at the first position in a state where the disk is not held holds the disk 31 on the turntable 32 by the disk mounting operation corresponding to the state. Since the clamp arm 34 is operated to be mounted, even when the second position as the holding state of the clamp arm 34 and the first position where the disk 31 is not held are mixed, the disc 31 and the clamp arm 34 The disc 31 can be securely attached to the turntable 32 without causing damage.
Can be attached.

[0090]

As described above, according to the first aspect of the present invention, when the disk holding lever is held at the first position by the lever holding means, the disk is placed between the receiving piece and the restraining piece. A mechanism for mounting the disc on the turntable and releasing the disc from the turntable by releasing the disc while holding it on the turntable and holding the disc at the second position, and releasing the disc from the turntable Therefore, it is not necessary to separately provide a mechanism for reducing the number of parts, and the configuration can be simplified. In addition, when the upper surface of the restraining piece is pressed downward by the inner peripheral edge of the disk when the disk holding lever is held at the first position without holding the disk by the lever holding means, the pressing force causes the guide means to move. By moving the disk holding lever inward and then returning the disk holding lever to the first position when the disk moves to the mounting position, the disk holding lever moves to the first position without holding the disk The disc can be mounted on the turntable even after the operation, and the disc can be mounted on the turntable even when there are a plurality of disc holding levers and the first position and the second position are mixed. be able to.

According to the second aspect of the present invention, the disk holding lever is allowed to move from the second position to the first position by pressing the receiving piece downward, and is forcibly operated by the operation body. By returning the disk from the first position to the second position, the disk can be mounted on the turntable by pressing the disk, and the disk can be ejected from the turntable by operating the operating body. A mechanism for releasing a disk from a turntable, and a mechanism for mounting a disk on a turntable, and a mechanism for discharging a disk from a turntable. Need not be separately provided, the number of components can be reduced, and the configuration can be simplified.

According to the third aspect of the present invention, the biasing force of the biasing means is caused to act in the holding direction at the first position and the second position of the disk holding lever by the inclination of the operating portion, respectively. There is no need to use a plurality of springs directly related to the loading and unloading of the disk, and the force applied when loading and unloading the disk can be reduced.

[0093]

According to the fourth aspect of the present invention, when the disk holding lever is moved inward by the guide means, the disk holding lever is moved upward by the locking means, and the restraining piece is moved to the first position. By positioning it above, the inner peripheral edge of the disc can be reliably held between the receiving piece and the restraining piece of the disc holding lever,
It is possible to eliminate mounting errors of the disk.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a disk rotation mechanism which is a prerequisite technique of the present invention.

FIG. 2 is a side sectional view showing a state before a disk is mounted in a disk rotating mechanism which is a prerequisite technique of the present invention.

FIG. 3 is a side sectional view showing a main part of the disk rotating mechanism before a disk is mounted.

FIG. 4 is a side sectional view showing a disc mounted state in the disc rotating mechanism.

FIG. 5 is a side sectional view showing a main part of the disk rotating mechanism in a disk mounted state.

FIG. 6 is a side sectional view showing a disk ejection state in the disk rotation mechanism.

FIG. 7 is a side sectional view showing a state before mounting a disk in the disk rotating mechanism according to the embodiment of the present invention.

FIG. 8 is a side sectional view showing a main part of the disk rotating mechanism before a disk is mounted.

FIG. 9 is a side cross-sectional view showing a disc mounted state in the disc rotating mechanism.

FIG. 10 is a side sectional view showing a main part of the disk rotating mechanism when a disk is mounted.

FIG. 11 is a side cross-sectional view showing a disk ejection state in the disk rotation mechanism.

FIG. 12 is a side sectional view showing a process of mounting a disk in the disk rotating mechanism.

FIG. 13 is a side sectional view showing a process of mounting a disk in the disk rotating mechanism.

FIG. 14 is a side sectional view showing a main part of FIG.

FIG. 15 is a perspective view showing the appearance of a disk rotating mechanism as a first conventional example.

FIG. 16 is a side sectional view showing a state before mounting a disk in the disk rotating mechanism.

FIG. 17 is a side sectional view showing a state where the disk is being mounted in the disk rotating mechanism.

FIG. 18 is a side sectional view showing a disc mounted state in the disc rotating mechanism.

FIG. 19 is a perspective view showing the appearance of a disk rotation mechanism according to a second conventional example.

FIG. 20 is a side sectional view showing a state before mounting a disk in the disk rotating mechanism.

FIG. 21 is a side cross-sectional view showing a state where the disk is being mounted in the disk rotating mechanism.

FIG. 22 is a side cross-sectional view showing a disc mounted state in the disc rotating mechanism.

FIG. 23 is a side sectional view showing the disk rotating mechanism in the middle of discharging the disk.

FIG. 24 is a side cross-sectional view showing a disc ejection state in the disc rotation mechanism.

[Explanation of symbols]

 Reference Signs List 1 disc 2 turntable 3 cap 4 clamp arm 4a fulcrum 4b receiving piece 4c suppressing piece 4d pressing piece 5 release button 5a operation surface 5b pressing portion 5c hinge portion 6,8 coil spring 7 operating member 7a slope

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-305858 (JP, A) JP-A 63-40853 (JP, U) JP-A 64-18452 (JP, U) 4209 (JP, B1) Jiko 62-45320 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 17/028

Claims (4)

(57) [Claims] 1. A disk rotating mechanism for mounting a disk on a turntable and rotating the disk together with the turntable, wherein the disk rotates vertically about a fulcrum with respect to the turntable.
Possible and slide in the direction of the turntable rotation center
One end about a fulcrum while being movably mounted
Is located on the upper surface of the receiving piece
A plurality of disc holding levers, each of which has a spherical shape, and a first position for holding the disc inner peripheral edge between the receiving piece and the restraining piece; The second pivoting upward from the position 1 releases the holding of the inner peripheral edge of the disc.
And a lever holding means for selectively holding the disc holding lever in the first position, and moving the disc holding lever inward with the downward pressing on the upper surface of the restraining piece when the disc holding lever is in the first position. And a guide means for returning the disc holding lever to the first position in accordance with the release of the pressing on the upper surface of the restraining piece , while the disc holding lever moves the disc to the turntable at the first position. A disk rotating mechanism characterized in that it is configured to be mounted. 2. The lever holding means allows the disk holding lever to move from a second position to a first position due to downward pressing of the receiving piece, and forcibly pushes the disk holding lever. 2. The disk rotating mechanism according to claim 1, further comprising an operation body for returning from the first position to the second position. 3. The lever holding means includes an operating part with which one end of the disk holding lever is in contact, and urging means for urging the operating part in one direction. 2. The disk rotating mechanism according to claim 1, wherein slopes are formed to actuate the biasing means in the holding direction at the first position and the second position of the disk holding lever. 4. The guide means is configured to rotate the disc holding lever in a downward direction when the disc holding lever is in the first position and the disc holding lever is pressed downward with respect to the upper surface of the restraining piece. 2. The disk rotating mechanism according to claim 1, further comprising a locking means for preventing movement and changing the rotational power to an upward moving force to move the disk holding lever upward.