JPH0356908Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a disk player equipped with a clamper for clamping a disk to a turntable.

``Prior Art'' Various disc players, such as compact disc players, are equipped with a clamping mechanism for clamping a disc set on a turntable, and FIG. 4 shows a conventionally commonly used clamping mechanism. A compact disc player (hereinafter referred to as a CD player) equipped with
The schematic configuration of the disk drive section of FIG.

Figure 4A shows the state when clamped, and Figure 4B shows the state when the clamp is released and ejected.In the figure, 1 is the chassis, 2 is the mechanical deck attached to chassis 1, and 3 is the mechanical deck. 2 is a motor for driving a disk, 4 is a turntable made of a magnetic material, 5 is a spindle, and 6 is a clamp mechanism. Further, symbol D is a disk.

The above-mentioned clamp mechanism 6 has a structure in which a clamper 8 is provided at the distal end of a clamper arm 7 whose distal end swings toward and away from the turntable 4 . As shown in FIGS. 5 to 7, the clamper 8 includes a disc-shaped clamper plate 10 made of a metal plate having an upwardly bulging bulge 9 formed in the center thereof, and the clamper plate 10. A disk-shaped mounting plate 11 fixed to the upper surface of the bulge 9, an annular magnet 12 fixed to the inside of the bulge 9 of the clamper plate 10 (on the lower surface side of the clamper plate 10), and a hemispherical The magnet 12 is made up of a stud 13 attached with its head 13a protruding from the lower surface of the magnet 12, and an annular felt 14 attached to the periphery of the lower surface of the clamper plate 10. And this clamper 8
is rotatably attached to the tip of the clamper arm 7, and is attached to the upper surface of the clamper plate 10 and the mounting plate 1.
1 within the gap between the clamper arm 7 and the lower surface.
It is locked so that it can move up and down.

The above-mentioned clamper 8, as shown in FIG. 4A,
During clamping, the disk D is attracted to the turntable 4 with the magnetic force of the magnet 12 sandwiching the disk D, thereby firmly clamping the center of the disk D set on the turntable 4. At this time, the head 13a of the stud 13 enters the recess formed in the center of the spindle 5 (see Fig. 6), and the axes of the clamper 8 and spindle 5 coincide, and the clamper arm 7 is moved relative to the disk D. The clamper 8 and the clamper arm 7 become parallel to each other and are out of contact with each other. Therefore, the clamper 8 attracted to the turntable 4 is not restrained by the clamper arm 7, and is moved together with the turntable 4 and the disk D. It is supposed to rotate.

Further, as shown in FIG. 4B, when ejecting, the clamper arm 7 comes into contact with the lower surface of the mounting plate 11, and lifts the clamper 8 upward against the magnetic force acting between the magnet 12 and the turntable 4. It is supposed to release the clamp.
At this time, the tip of the clamper arm 7 and the mounting plate 11 of the clamper 8 are positioned inside the notch 15 provided in the chassis 1.

Note that the felt 14 attached to the lower surface of the clamper plate 10 prevents the disk D from being scratched during clamping.

"Problems that the invention attempts to solve" By the way, in the conventional CD player mentioned above,
The structure of the clamper 8 in the clamping mechanism 6 is complicated, and the number of component parts is as large as five, which poses a problem in that a large number of man-hours are required to assemble the clamper 8.

Furthermore, since the clamper plate 10 is made of a metal plate and the magnet 12 is used, there is a problem in that load control is difficult.

Furthermore, in the conventional clamping mechanism 6, there is room for the clamper 8 to move up and down with respect to the clamper arm 7 when ejecting (the state shown in FIG. 4B). When large external vibrations are applied,
There was also a problem in that the clamper 8 vibrated up and down and repeatedly contacted the clamper arm 7 and the chassis 1, causing abnormal noise.

"Means for Solving the Problems" In order to solve each of the above-mentioned problems, this invention includes a turntable provided inside the chassis, and a space between the turntable and the chassis. A disc player comprising a clamper disposed so as to be able to move toward and away from the turntable, and configured to clamp the disc to the turntable by attracting the clamper to the turntable by magnetic force,
The clamper has a clamper plate made of a magnetic plastic material, and the clamper plate is attracted to the turntable by its own magnetic force to clamp the disk. The clamper plate is characterized in that it is configured to be attracted to the chassis by its own magnetic force when the clamper plate is separated from the turntable and the clamp is released.

"Embodiment" Hereinafter, an embodiment in which this invention is applied to a CD player will be described with reference to FIGS. 1 to 3.

Figures 1A and 1B show the schematic configuration of the disk drive section of the CD player of this embodiment, where A shows the clamped state and B shows the ejected state. DC for this example
A sectional view of the clamper 22 in the clamp mechanism 20 provided in the player, and FIG. 3 is an exploded perspective view thereof. It should be noted that the parts in the DC player of this embodiment that are constructed in the same way as in the conventional CD player described above will be designated by the same reference numerals as in FIGS. 4 to 7, and the explanation thereof will be omitted.

The CD player of this embodiment differs from the conventional CD player described above in the configuration of the clamp mechanism 20. That is, the clamp mechanism 20 in this CD player includes a clamper arm 21 similar to the conventional clamper arm 7 described above,
It consists of a clamper 22 that is locked to the tip of the clamper arm 21 in the same way as the conventional clamper 8, but as shown in FIG. 3, the clamper 22 is molded with magnetic powder mixed therein. The clamper plate 23 is made of a plastic material (hereinafter referred to as plastic magnet) which is magnetic in itself by
The stud 24 has a hemispherical head 24a.
It is said that it is configured with a.

The clamper plate 23 has a bulging portion 23b.
The mounting portion 23c is formed at the upper part of the main body portion 23a. In other words, the clamper plate 23 is made by integrally molding the clamper plate 10 and the mounting plate 11 of the conventional clamper 8 with a plastic magnet, and is different from the magnet 1 of the conventional clamper 8.
2. The felt 14 is omitted.

As shown in FIG. 1A, the above-described clamper 22 is adapted to clamp the disk D by being attracted to the turntable 4 by the magnetic force of the clamper plate 23 itself during clamping. At this time, the main body 2 of the clamper plate 23
The lower surface of magnet 3a directly contacts the surface of disk D, but since plastic magnets are softer than metal materials, disk D will not be scratched.

Furthermore, as shown in FIG. and clamper plate 23
It is adapted to be attracted to the chassis 1 by its own magnetic force. Reference numeral 25 in the figure is a cushion sheet affixed to the inner surface of the chassis 1.

As is clear from the above explanation, in order to make the clamper plate 23 stick to the turntable 4 and the chassis 1, the turntable 4,
Each of the chassis 1 may be made of a magnetic material, but if they are made of a non-magnetic material, a magnetic material or a magnet (for example, a plastic magnet) may be attached to the surface thereof by adhesion or the like. .

In the case of the above-mentioned clamper 22, the clamper plate 23 is made of a plastic magnet, which is lighter than a metal plate, and has its own magnetic force, so no other magnet is required. Therefore, load control becomes easy.

Further, since the clamper 22 has only two components, the clamper plate 23 and the stud 24, it is possible to reduce the number of man-hours required for assembling the clamper, and it is also possible to reduce costs.

Furthermore, when ejecting, the clamper plate 2
Since the clamper 22 is configured to be attracted to the chassis 1 by its magnetic force, there is no room for the clamper 22 to vibrate even if vibration is applied to the CD player at the time of ejecting, and no abnormal noise will be generated. . Therefore, it is effective when applied to CD players that are subject to large external vibrations, such as in-vehicle CD players.

In the above embodiment, the clamper 22 is attached to the tip of the clamper arm 21 and the clamper arm 21 is swung to move the clamper 22 toward and away from the turntable 4. The mechanism for moving the turntable 4 toward and away from the turntable 4 is not limited to the above. Further, in the above embodiment, the peripheral edge of the upper surface of the main body portion 23a of the clamper plate 23 is configured to be attached to the chassis 1, but the present invention is not limited thereto. It may be configured. Furthermore, although the above embodiment applies this invention to a CD player, this invention can be widely applied not only to CD players but also to record players, video disc players, and other disc players in general. In that case, the shape of the clamper plate 23 may be changed as appropriate depending on the disc player to which it is applied.

``Effects of the invention'' As explained in detail above, according to this invention, since the clamper plate is made of a magnetic plastic material, load control is facilitated, and the number of man-hours required for assembling the clamper is reduced. This has the effect that it is possible to reduce the cost, and also to reduce costs.

Also, since the clamper plate is configured to stick to the chassis when ejecting,
Even if vibration is applied at the time of ejecting, there is no room for the clamper to vibrate, thus producing the effect of preventing abnormal noise from occurring.

[Brief explanation of the drawing]

1 to 3 show an embodiment in which this invention is applied to a CD player. 1st
The figures schematically show the configuration of the disk drive section of the CD player of this embodiment, in which A is a cross-sectional view showing the clamped state, B is a cross-sectional view showing the ejected state, and FIG. 2 is a cross-sectional view of the clamper. FIG. 3 is an exploded perspective view of the clamper. Figures 4 to 7
The figure shows a CD player equipped with a conventional clamp mechanism. Figure 4 shows a schematic configuration of the disk drive section of a conventional CD player, in which A is a sectional view showing the clamped state, B is a sectional view showing the ejected state, and Figure 5 shows the tip of the clamp mechanism. 6 is a sectional view of the clamper, and FIG. 7 is an exploded perspective view of the clamper. 1... Seat, 4... Turntable, 20
... Clamp mechanism, 22 ... Clamper, 23 ...
Clamper plate.

Claims (1)

[Scope of utility model registration request] It has a turntable provided inside a chassis, and a clamper disposed between the turntable and the chassis so as to be able to move toward and away from the turntable, and the clamper is attached to the turntable. On the other hand, in a disk player configured to clamp the disk to the turntable by attracting it with magnetic force,
The clamper has a clamper plate made of a magnetic plastic material, and the clamper plate is attracted to the turntable by its own magnetic force to clamp the disk. 1. A disk player characterized in that, when the clamper plate is separated from the turntable and the clamp is released, the clamper plate is attracted to the chassis by its own magnetic force.