JPH103719A - Disk clamping mechanism of disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the malfunction in a mechanism provided with a changeover mechanism for changing over a disk reproducing part to the float supporting state and the nonfloat supporting state by driving an arm for supporting a clamper through an elastic link. SOLUTION: When the disk 14 is transported on a turntable by a disk transporting mechanism at the time of clamping, a shaft 13 is moved in the loading direction, and the arm 11 and clamper arm 5 are turned clockwise and counterclockwise respectively. In this case, a link 9 is not deformed in the middle of the turning operation of the clamper arm 5 since the dead weights of the clamper arm 5 and the clamper 1 are smaller as compared with the elastic force of the link 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player, and more particularly, to a disc clamp mechanism.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional disk clamp mechanism of a disk player. Chassis 4 as shown
The turntable 2 is fixed to a rotating shaft of the disk motor 3 fixed to the turntable 2. Clamper 1 is turntable 2
Arm 5 via a clamper mounting bracket 8
Mounted on The clamp arm 5 is rotatably supported by the chassis, and is urged by a torsion coil spring 7 in a counterclockwise direction as illustrated.

The slider 6 is driven in conjunction with a disk transport means (not shown), and is driven in an ejecting direction and a loading direction indicated by arrows. Clamp arm 5
The shaft 5a erected on the slider 6 is pressed against the cam formed on the slider 6 and is rotated by the slider 6 of the clamp arm 5. When the clamp arm 5 is rotating counterclockwise, the clamper 1 presses the disc loaded on the turntable 2 against the turntable 2 to bring it into a clamped state.

[0004]

In the above-mentioned conventional disk clamp mechanism, the stroke of the slider 6 cannot be made large, so that the shaft 5a is arranged near the center of rotation of the clamp arm 5. Therefore, the ascending position of the clamp arm 5 changes greatly due to variations in the dimensions of the parts, and as a result, there is a possibility that a problem such as a defective disk transport may occur. Furthermore, since a large force of the torsion coil spring 7 is applied to the clamp mechanism at the time of unclamping, the driving load of the mechanism is large, causing a problem in durability.

The present invention has been made in view of the above points, and an object of the present invention is to provide a disk player in which the positional accuracy of each member when unclamping is improved and the load when unclamping is reduced. An object of the present invention is to provide a disk clamp mechanism.

[0006]

According to the present invention, there is provided a disc clamping mechanism for supporting a clamper in a disc player having a disc reproducing unit and a switching mechanism for switching the disc reproducing unit between a floating support state and a non-floating support state. Is driven through an elastic link.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk clamp mechanism according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a main part of a disk clamp mechanism according to an embodiment of the present invention, and FIG. 2 is a side view showing an operation of the disk clamp mechanism. In the figure, a clamper 1 is rotatably supported with a clearance on a clamper mounting bracket 8 fastened to a clamper arm 5 with a screw 8a.

The clamper arm 5 is rotatably supported by a shaft 10b and a shaft 10c provided upright on a chassis of the disk reproducing section. A protrusion 5 is provided at the tip of the clamper arm 5.
b is provided. Although not shown, the chassis of the disc reproducing unit is supported by the fixed chassis in a floating state when clamped, and is fixed to the fixed chassis when not clamped.

A link 9 made of a leaf spring is fastened to the clamper arm 5 with a screw 9b. The shaft 11b of the arm 11 shown in FIG. 2 is inserted through a long hole 9a provided in the link 9. The arm 11 is rotatably supported on a shaft 10a erected on a chassis of the disc reproducing unit. A shaft 13 of a slider slidably supported by the chassis of the disk reproducing unit is inserted into the groove 11a of the arm 11. Although not shown, the slider is driven in the ejecting direction and the loading direction indicated by arrows in FIG. Below the clamper 1, a turntable 2 (shown in FIG. 2A) fixed to the rotating shaft of the disk motor is located. The disk motor is fixed to the chassis of the disk reproducing unit.

Next, the operation of the disk clamp mechanism having the above configuration will be described with reference to FIG. FIG. 2A shows a state at the time of unclamping. At this time, the arm 11 is rotating counterclockwise, the clamp 9 is urged clockwise by the deformation of the link 9, and the protrusion 5 b at the tip of the clamper arm 5 is pressed against the fixed chassis 12. The pressing force is set such that the clamper arm 5 does not separate from the fixed chassis 12 with a slight vibration of the fixed chassis 12.

Therefore, the clamper arm 5 is accurately positioned. In the conventional disk clamp mechanism described with reference to FIG. 3, the position of the clamper arm 5 is not accurate because the clamper arm 5 is positioned on the shaft 5a near the center of rotation of the clamper arm 5.

At the time of clamping, when the disk 14 is transported onto the turntable as shown in FIG. 2B by a disk transport mechanism (not shown), the shaft 13 moves in the loading direction, and the arm 11 and the clamper arm 5 are moved. Rotate clockwise and counterclockwise, respectively. FIG. 2 (b)
Indicates the middle of the rotation of the arm 11. Since the own weight of the clamper arm 5 and the clamper 1 is smaller than the elasticity of the link 9, the link 9 is not deformed during the rotation of the clamper arm 5.

When the arm 11 is further rotated clockwise, as shown in FIG.
4. The turntables 2 come into contact with each other. In this state, since the link 9 is not deformed, no clamping pressure is generated.

When the arm 11 is further rotated clockwise from the position shown in FIG. 2C, the link 9 is deformed as shown in FIG. In this state, the disk 14 is pressed against the turntable 2 in a fitted state, and the clamper 1 is fitted to the turntable 2 and
4 and the clamper 1 are accurately positioned. Arm 1
1 generates a small clamping force, and the load on the clamping mechanism is small as a whole. The unclamping operation is performed by driving the shaft 13 in the opposite direction.

Although the embodiment is constructed as described above, the invention is not limited to this. For example, the link for driving the clamper arm may be constructed using a torsion coil spring or a tension coil spring.

[0016]

According to the disk clamp mechanism of the present invention, each member can be accurately positioned when the disk is not clamped, so that the clearance between the disk and the clamp mechanism can be reduced, and the apparatus can be made thin. .

Further, since a load for generating the clamping force is not applied to only a small part of the movement stroke of the clamp mechanism, power consumption is reduced and durability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a disk clamp mechanism according to an embodiment of the present invention.

FIG. 2 is a side view showing the operation of the disk clamp mechanism.

FIG. 3 is a side view showing an example of a conventional disk clamp mechanism.

[Explanation of symbols]

 Reference Signs List 1 clamper 2 turntable 3 disk motor 4 chassis 5 clamp arm 5a shaft 5b protrusion 6 slider 7 torsion coil spring 8 clamper mounting bracket 9 link, 9a slot 10a, 10b, 10c shaft 11 arm, 11a groove, 11b shaft 12 Fixed chassis 13 axis 14 disk

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Sato 1-14-6 Dogenzaka, Shibuya-ku, Tokyo Co., Ltd. Inside Kenwood Corporation (72) Inventor Yasushi Kuroda 1-16-16 Dogenzaka, Shibuya-ku, Tokyo Stock Company Inside Kenwood

Claims (1)

[Claims] 1. A disk player having a disk reproducing unit and a switching mechanism for switching the disk reproducing unit between a floating support state and a non-floating support state, wherein a clamp arm supporting a clamper is driven via an elastic link. A disc clamping mechanism.