JPH0424518Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention provides an idling prevention mechanism that prevents the disk from rotating due to inertia when the disk is being rotated at high speed during playback and is taken out of the player. The present invention relates to a disc player having:

(b) Conventional technology Conventionally, as a disk player having an idling prevention mechanism, Japanese Patent Application Laid-Open No. 61-210557 (G11B 17/0
The device disclosed in 4) is known. Such a disc player has a tray for transporting discs,
A recess for storing a disk is provided on the upper surface of the tray, and a protrusion having a damper at the upper part protrudes from the recess so as to be movable up and down. Such a protrusion protrudes from the recess when the tray moves between the attachment/detachment position where the tray is pulled out of the player and the playback position where it is pushed into the player. The disk is lifted up by this protrusion. After the tray has moved to the playback position, the clamp lever that supports the clamp member is moved toward the turntable, and this movement of the clamp lever moves the protrusion downward, which lowers the disk and moves it toward the turntable. At the same time, the clamp member presses the disc against the turntable to complete the mounting of the disc.

When a disc being played is to be taken out of the player, the clamp lever is first moved upward, thereby separating the clamp member from the upper surface of the disc and releasing the chuck of the disc. At the same time, in conjunction with the movement of the clamp lever, the protrusion projects upward from the recess in the tray, comes into contact with the lower surface of the disk, and lifts the disk. A damper with a high friction coefficient is attached to the top surface of the protrusion, so when the protrusion protrudes as described above and the damper comes into contact with the bottom surface of the disk, the friction force generated between the damper and the disk surface causes the disk to Rotation is stopped.

As described above, the rotation of the clamp lever for the disc being played is stopped when the disc is moved to the non-clamping position, and then the disc is moved to the attachment/detachment position by pulling out the tray.

In compact disc players (hereinafter referred to as CD players) that have become popular in recent years, the disc is mounted on a turntable with the recording surface facing the turntable, that is, in the conventional example described above, the damper is in direct contact with the recording surface. However, such direct contact of the damper with the recording surface may cause foreign matter to adhere to the recording surface, which is not preferable.
Especially if the CD player has been used for many years,
If the damper corrodes and adheres to the information surface, or if the damper hardens and the coefficient of friction decreases, even if the damper contacts the information surface, the rotation of the disk may not be stopped and the disk may spin idly.

In addition, in the above conventional technology, when a disk rotating at high speed is taken out during playback, the clamp member first moves and then the damper contacts the disk surface, so when the damper contacts the disk surface, the upper surface of the disk A gap is created, and as a result, when the damper comes into contact with the disk rotating at high speed, the rotational braking force exerted by the damper causes the disk to wobble in the gap, making it impossible to effectively brake the rotation of the disk.

Furthermore, since the projection with the damper is pressed and displaced by the downward bias of the clamp lever,
The clamp lever must always be biased by a biasing means, and therefore cannot be used for so-called magnetic chucking in which magnets and magnetic bodies are disposed in the clamp member and turntable, respectively.

(c) Problems to be solved by the invention This invention solves the problems of the prior art listed above, namely, damage to the recording surface caused by direct contact of the damper with the recording surface, and damage to the top and bottom of the disk that occurs when braking the rotation of the disk. The object is to solve the problem of directional wobbling and the difficulty of applying magnetic chuck to the prior art.

(d) Means for solving the problems In view of the above problems, the disk player of the present invention has a lifter that supports the edge of the disk and moves horizontally and vertically to separate and place the disk on the turntable. , a clamp member that presses and attaches a disk placed on the turntable to the turntable, and a slide member that moves in parallel to the horizontal direction, and as the slide member is driven, the lid is moved in the direction of the lid. The cam means has a drive mechanism that continuously drives in the horizontal direction and the vertical direction, and a cam means disposed on the drive mechanism and engages with a part of the clamp member to control the raising and lowering of the clamp member. is arranged on the drive mechanism so that the clamping means does not rise until the lifter rises in response to driving of the drive mechanism in one direction and the lifter contacts the edge of the disk. shall be.

(E) Function When playing a disc while the disc is rotating at high speed, if you operate the disc to take it out of the player, the lifter will rise and the disc will be caught between the lifter and the clamp member, stopping the rotation of the disc. Ru. At this time, the lifter comes into contact with the edge of the disk where no information is recorded, so it does not damage the recording surface. Thereafter, the clamp member is moved upward and the disk can be taken out.

(f) Examples An embodiment of the present invention will be described below.

Figure 1 shows the external appearance of the main device. 1 is a CD
A player section, 2 is a tape player section, 3 is an operation section, and 4 is a radio tuning knob. As shown in the figure, the CD player section 1 is positioned at the bottom of the main device, that is, the CD player section 1 is attached to the bottom lid 5 of the main device.

The CD player section 1 is shown in FIG. 2, and its configuration will be explained in detail below.

Reference numeral 6 denotes a support chassis on which a pick-up 7 is slidably supported via shafts 8, 8, and a turntable 9 and a spindle motor (not shown) for driving this turntable 9 are mounted. A cover 10 covers the upper surface of the support chassis 6, and has a long hole 11 and an opening 12 through which the pickup 7 and turntable 9 face the outside. This cover 10 has screws 13, 13, 1
3 and 13 to the upper surface of the support chassis 6. The support chassis 6 on which the pickup 7, turntable 9, etc. are mounted in this manner is screwed to the bosses 15, 15, 15, 15 of the bottom lid 5 via rubber dampers 14, 14, 14, 14. The rubber damper 14, 14, 14, 14
acts to elastically lift the support chassis 6 relative to the bottom lid 5, and absorbs external vibrations before they are transmitted to the support chassis 6.

Reference numeral 16 denotes a tray for transporting disks, which has an opening 17 and supports the lifter 20 through guide holes 19, 19, 19, 19 formed in side walls 18, 18. That is, the lifter 20 has pins 21, 21, 21, 21 bored on both sides thereof, and the pins 21, 21, 21, 21 are inserted into the guide holes 19,
By fitting into the trays 19, 19, 19, the lifter 20 is supported so as to be slidable diagonally relative to the tray 16. The lifter 20 is biased in the direction of arrow A by a spring being stretched between it and the tray 16.
0 is positioned diagonally above the tray 16. The lifter 20 also includes a storage section 20a for storing and placing a disk, and this storage section 20a.
An opening 20b is provided in the housing 20a, and positioning pins 20c and 20C are installed in the vicinity of the housing portion 20a. Two bearings are arranged on the bottom of the tray 16, and after inserting the shafts 21, 21 into these bearings, the shafts 21, 2
1 to the support frames 22, 22, and further attach the support frames 22, 22 to the screw holes 23, 2 of the bottom lid 5.
3, 23, 24, 24, 24, the tray 16 is attached to the bottom lid 5.
It is supported so as to be slidable in the −B′ direction.

Reference numeral 25 denotes an L-shaped clamp lever, and a rotating shaft 26 is disposed at the bent portion of the clamp lever.
28 and further prevent the rotation shaft 26 from coming off with the screws 29, 29.
It is rotatably supported by 7 and 27. A stabilizer 30 is rotatably supported at the pivot end of the clamp lever 25, and a protrusion 31 is provided near the pivot shaft 26.

Reference numeral 32 denotes a regulating member for regulating the lifter 20, which is screwed onto a boss 33 of the bottom lid 5.

The state in which each of the mechanical parts configured as described above is attached to the bottom lid will be explained with reference to FIG. 3.

As mentioned above, the support chassis 6 is elastically supported by the bottom lid 5. Such support chassis 6
Shafts 21, 21 are arranged in parallel with each other in between,
The tray 16 is slidably supported by the shafts 21, 21. FIG. 3 shows the disk mounted state with the tray 16 pulled out. When the tray 16 is carried in, the tray 16 and the lifter 20 pass through the upper part of the support chassis 6. The clamp lever 25 is arranged on the side of the tray 16 so that its rotation axis 26 is parallel to the shaft 21, and the stabilizer 30 at the rotation end faces the turntable 9. In addition, in such a state where the disk is attached, the clamp lever 25 is attached to the protrusion 3.
Since the stabilizer 1 contacts the side wall 18 of the tray 16 and its rotation is restricted, the stabilizer 30 is separated from the turntable 9 (unclamped state).
At this time, the lifter 20 is positioned diagonally above the tray 16 by the spring as described above.

From this state, when the disk is stored in the storage section 20a of the lifter 20 and the tray 6 is pushed in, the tray 16 is moved between the turntable 9 and the stabilizer 30. At this time, lifter 20
two positioning pins 20c planted on the top surface of
By passing the stabilizer 30 between the clamp levers 20c, the edge of the stabilizer 30 comes into contact with one of the positioning pins 20c, 20c, and the positional deviation of the stabilizer 30 with respect to the clamp lever 25 is corrected. Then, at the timing when the tray 16 is further pushed in and the center hole of the disk is positioned directly above the turntable 9, the edge of the lifter 20 comes into contact with the regulating member 32 and its movement is regulated. At the same timing, the protrusion 31 of the clamp lever 25 reaches the cam portion 18a of the side wall 18 of the tray 16. And then more tray 16
When the lifter 20 is pushed in, the movement is restricted by the restriction member 32 and the guide holes 19, 19, 1 of the tray 16 are moved.
9 and 19, the disc is moved directly below and placed on the turntable 9. Furthermore, at this time, the protrusion 31 of the clamp lever 25 passes over the cam portion 18a, so that the clamp lever 25 is rotated toward the turntable, and the stabilizer 30 comes into contact with the upper surface of the disk placed on the turntable. A magnet is attached to the stabilizer 30, and the turntable 9 is made of a magnetic material, so the magnetic force acting between the stabilizer 30 and the turntable 9 causes the disc to be clamped between them. be done. The disk is mounted in the manner described above, and the disk becomes playable.

By the way, in the bottom lid 5, a printed circuit board 34 having a CD circuit section for controlling the above-mentioned mechanism section is attached to the side of the above-mentioned mechanism section by screws 35, 35, 3.
5, 35. 36 is like this
Power line for supplying power to the CD circuit section,
Reference numerals 37 and 38 are signal transmission lines connected to the pickup 7 of the mechanical section, a spindle motor (not shown), switches of various parts, etc., for transmitting control signals and the like. Furthermore, signals are transmitted and received through the terminal 39 with functional units other than the CD player unit.

Next, the disk unloading operation will be explained below. When a disk unloading command is applied from the disk reproducing state shown in FIG. 4, the lock by the locking means (not shown) is released and the tray 16 is pulled out. At this time, the drive current applied to the spindle motor 40 is cut off, but the disk D continues to rotate due to inertial movement. When the tray 16 is pulled out by such an operation, only the lifter 20 is raised by the initial slight tray pull-out operation, contrary to the aforementioned pushing-in operation of the tray 16. Then, due to the rise of the lifter 20,
Disc D is lifted by this lifter 20 and separated from turntable 9. At this time,
The outer circumferential portion of the disk D is supported by a support portion 41 provided along the outer circumferential portion of the storage portion 20a of the lifter 20 (see FIG. 7). Furthermore, the stabilizer 30 is attached to the protrusion 31 of the clamp lever 25.
does not reach the cam portion 18a on the side wall of the tray, so it is not rotated upward by the cam portion 18a, but as the lifter 20 rises, it is displaced upward together with the disk D (Fig. 5). reference).
That is, at this time, the disk is attached to the support section 41 of the storage section 20a.
and the stabilizer 30,
The rotation of the disk D, which had been rotating due to inertia, is reliably and quickly stopped by this operation. At this time, since the disk D is supported by the outer periphery of the support portion 41, there is no risk of damaging the information recording area. When the tray 16 is further pulled out, the protrusion 31 of the clamp lever 25 reaches the cam portion 18a of the tray 16, so the clamp lever 25 is rotated upward, and the stabilizer 30
is positioned in the unclamped position (see Figure 6). After that, when the tray 16 is pulled out, the P edge of the stabilizer 30 comes into contact with the peripheral wall of the storage section 20a of the lifter 20 in FIG. direction). When the stabilizer 30 is pressed in this manner, the stabilizer 30 rotates around the central axis and also rotates in the direction of arrow C using the point O as a fulcrum, and rides on the upper surface of the lifter 20. In this manner, the stabilizer 30 is retracted so as not to obstruct the movement of the tray 16, and the tray 16 is then further pulled out to reach the disk loading/unloading position.

(g) Effects of the invention According to the invention, when a disc player attempts to take out a disc during playback, the disc is once clamped between the lifter and the clamp member.
Since the disc is taken out after the rotation of the disc is stopped, the disc does not idle on the lifter during such operation. Moreover, since such idling is prevented by the disk being held between the clamp member and the lifter, the disk does not wobble in the vertical direction during such operation, and idling can be stopped quickly and reliably. Furthermore, during the idling prevention operation, since the edge of the surface of the disk on the lifter side is supported by the lifter, there is nothing on that surface that comes into contact with the recording area, thus preventing scratches on the recording surface. There is no risk that something like that will happen.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and Fig. 1 is an external perspective view, Fig. 2 is an exploded perspective view of the main part, Fig. 3 is a perspective view of the main part, Fig. 4, Fig. 5, and FIG. 6 is a sectional view taken along the line D-D' in FIG. 3 to show the operation, and FIG. 7 is a view showing the state of the disk supported by the lifter. 9... Turntable, 16... Tray (drive mechanism), 18a... Cam portion (cam means), 20...
Lifter, 25...clamp lever.

Claims (1)

[Claims for Utility Model Registration] A lifter that supports the edge of a disk and moves horizontally and vertically to separate and place the disk on the turntable; a clamp member that is attached by pressing the clamp member; and a drive mechanism that includes a slide member that moves parallel to the horizontal direction and continuously drives the lid in the horizontal direction and the vertical direction as the slide member is driven. , a cam means disposed on the drive mechanism that engages with a part of the clamp member to control the lifting and lowering of the clamp member; the cam means moves the lifter in response to driving of the drive mechanism in one direction; 2. A disc player, wherein the drive mechanism is arranged so as not to raise the clamping means until the lifter is raised and the lifter comes into contact with the edge of the disc.