JPS6338443Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact disc player for playing compact discs.

Most compact disc players, which digitally read and play back signals recorded on the signal recording surface of a compact disc (hereinafter simply referred to as a disc), have a structure in which the disc is inserted and removed from the front of the player body. There is. The disk loading mechanism for mounting the disk in the playback position within the player body can be roughly divided into two types: a type in which the disk mounting plate slides back and forth, and a type in which a lid is opened and closed centering on the bottom edge. .

In the disc loading mechanism where the lid guides and attaches the disc, the lid opens by operating the eject button, etc., the disc is dropped between the opened lid and the player body, and the lid is pressed by hand or the play button, etc. The lid closes mechanically by pressing .

However, this type of conventional compact disc player has a complicated mechanism for lifting and lowering the disc inserted between the lid and the player body, and clamping the disc, and the lid is opened and closed using motor power. Even if the motor is configured to do so, if the power to the motor is cut off due to a power outage, etc., the lid may not move even if you try to open it by hand, or you may not be able to unlock the lid. There were some shortcomings.

The present invention eliminates the above-mentioned drawbacks.The disk clamper is fixed to the outer cover, the disk lifter is installed on the inner cover so that it can be raised and lowered, and the disk lifter is raised and lowered by an expanding mechanism guided by a cam provided on the outer cover. To provide a compact disc player having a structure in which the disc can be raised and lowered and clamped or unclamped reliably, and a sufficient distance can be taken for the disc to be raised and lowered.

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

FIG. 1 is a schematic perspective view showing an embodiment of the compact disc player of the present invention, FIGS. 2 to 4 are a plan view, a front view, and a left side view of the compact disc player, respectively, and FIG. FIG. 6a is an exploded perspective view of the mechanism for lifting and lowering the disk, and FIGS. 6b and c show the main parts of the mechanism in FIG. 6a when the lid is closed and opened. 7 to 9 are diagrams for explaining the opening and closing operations of the lid, respectively.

In FIG. 1, the compact disc player 1 is
The player main body 1a has a lid 2 on the left side when facing the front side, and the play button, stop button 5, eject button 6, etc. necessary for playing the disc 3 are located on the right side when facing the front side. Buttons 7 are located at each corner of the left shoulder.

The lid 2 includes an outer lid 8 with a disk clamper 8a and a disk lifter 9a, as shown in FIG.
It has a double structure with an inner lid 9 and an outer lid 8 with an inner lid 9.
The shafts also rotate around a common support shaft 10. A compression spring 11 is interposed between the outer cover 8 and the inner cover 9.
This spring 11 biases the two in a direction to separate them from each other, but the locking portions 8b and 9b bent at the upper ends of each restrict the maximum separation angle. The disk clamper 8a attached to the outer lid 8 is of a ball pivot type and is able to freely rotate around a ball 88a, and clamps the center hole of the disk 3 to the platter 12 when the lid 2 is closed. . The disk lifter 9a provided on the inner lid 9 is connected to two guide rods 1 on both sides as shown in FIG.
3, and an arcuate groove 99a is formed in the center thereof to receive the inserted disk 3 along its outer periphery. Further, a pair of fork-shaped disk guides 14 are provided so as to sandwich the hoistway of the disk lifter 9a from both sides, and both disk guides 14 are fixed to the upper part of the inner lid 9. 9c is a notch formed at a predetermined depth in the upper part of the inner lid 9, and a notch 9c is formed at a predetermined depth in the upper part of the inner lid 9.
The disc 3 is provided so that a fingertip can be inserted into the center hole of the disc 3 from behind the inner cover 9 when the disc 3 is at its highest raised position.

Here, in order to prevent the lid 2 having the above structure from being opened by mistake during playback of the disc 3, a locking mechanism 15 shown in FIG. 5 is used to prevent the lid from being opened accidentally. The unlocking of 15 is automatically performed by the power of a single motor 16, as is the case with opening/closing the lid 2, raising and lowering the disk 3, etc. This motor 16 is provided on the left side of the player main body 1a, and the lid 2 is opened or closed by its forward or reverse rotation.

When the disc 3 is installed in the player body 1a and the lid 2 is completely closed as shown in FIG. 7, the pair of left and right lock levers 17 and 18 in the lock mechanism 15 shown in FIG. However, the claws 17a and 18a are locked to both sides of the upper end of the outer lid 8, and the lid 2 cannot be opened by hand. In this case, in order to take out the disc 3 from inside the player body 1a, it is necessary to press the eject button 6, but it is assumed that the power button 7 is pressed and the power is turned on.

When the eject button 6 is pressed, the motor 16 is energized and starts rotating forward. As shown in FIGS. 2 to 4, the forward rotational power of the motor 16 is transmitted to a large diameter pulley 20 via a rubber belt 19, and is further transmitted to a large diameter gear 21 that meshes with a small gear 20a integrated with the pulley 20. can be conveyed to. This gear 21 has a friction clutch plate 22 and a small gear 22 which are coaxial and have approximately the same diameter.
A constitutes a friction clutch, and a compression spring 23 urges the gear 21 against the friction clutch plate 22 in a direction in which the friction engagement surfaces coincide with each other. The small gear 22a becomes a driven side when one of the gears 21 is a driving side, and while it is possible to transmit power from the driving side to the driven side, when the driven side is rotated, the slip is As a result, power is not transmitted to the drive side.

Since internal teeth formed on the inner circular arc surface of a sector-shaped cam gear 24 for opening and closing the lid 2 are engaged with the small gear 22a on the driven side, the forward rotational power of the motor 16 is transmitted to the cam gear 24. Note that when the lid 2 is completely closed, the small gear 22a is slightly offset from the cam gear 24, and the meshing between the two is released.

On the other hand, the forward rotation power of the motor 16 is transmitted to a large diameter pulley 26 different from the large diameter pulley 20 via another rubber belt 25, and further
The signal is transmitted to a large gear 27 that meshes with a small gear 26a that is integrated with 6. The rotation of the large gear 27 is caused by a small gear 27a which is integrated with the large gear 27, and a large gear 28 which is coaxial with the pulley 26.
The ratchet 28 integrated with the large gear 28
a rotates at low speed.

Here, the ratchet 28a is engaged with a pawl 29a pivotally supported on the angle 29. Therefore, as the ratchet 28a rotates, the angle 29 is pushed, and the lever 30 supporting the angle 29 at one end thereof is pushed. rotates around the support shaft 30a against the spring 31. The other end of this lever 30 is engaged with a slider 32 by a pin 30c, and as the lever 30 rotates, the slider 32 retreats in the direction of arrow A shown in FIG.
are designed to open around support shafts 17b and 18b, respectively.

That is, the left lock lever 17 is connected to the tip of the slider 32 by an L-shaped transmission lever 33, and as the slider 32 moves backward, the transmission lever 33 rotates.
is pushed by the tip of the transmission lever 33, and the spring 34
It opens in the unlocking direction (in the direction of arrow B shown in FIG. 5) against the force.

On the other hand, the right lock lever 18 is connected to the middle part of the slider 32 by an L-shaped transmission lever 35 and a rod 36. When the slider 32 moves backward, the transmission lever 35 rotates and the rod 36 is pulled to the left (in the direction of arrow D shown in Figure 5). As a result, the right lock lever 18 opens in the lock release direction (in the direction of arrow C shown in Figure 5) against the spring 37.

In this way, the locking mechanism 15 of the lid 2 immediately releases the lock on the outer lid 8 when the motor 16 starts rotating forward.

Here, a leaf spring 30b is fixed to the side of the lever 30, and this leaf spring 30b is connected to the cam gear 24.
It is in contact with the rear end step. Therefore, when the lever 30 is rotated by being pushed by the ratchet 28a, the cam gear 24 is pushed by the leaf spring 30b, rotates forward, and meshes with the idling small gear 22a. As a result, the cam gear 24 rotates together with the outer cover 8 about the support shaft 10 by the power of the motor 16 via the small gear 22a, and opens into a predetermined forward tilted state.

On the other hand, the inner cover 9 is displaced together with the outer cover 8, but as shown in FIG. 8, it remains at the stopped position until the outer cover 8 opens at a certain angle and the locking portions 8b and 9b meet. This is the disk clamper 8a
After completely releasing the clamp on disk 3,
This is to prevent the rise of the disk 3, which will be described later, from being obstructed by the disk clamper 8a when the inner lid 9 begins to open. In this example,
After the locking portions 8b and 9b lock each other, the inner lid 9 is pulled by the outer lid 8 and begins to open.
The state shown in the figure is reached.

By the way, as shown in FIGS. 6a to 6c, the cam gear 24 has a cam groove 24a having a sine curved cam curve formed on its side surface. A pin 38a as a guide provided on the drive body 38 of the triple speed enlargement mechanism 37 is engaged with this cam groove 24a, and by guiding the drive body 38 via the pin 38a, the driven body 39 is moved. It is designed to move up and down at three times the speed of the driving body 38. The driving body 38 and the driven body 39 are both slidable on two guide rods 40, and the large diameter gear 41a of the different diameter pinion 41 provided at the lower end of the driving body 38 is attached to the right side of the driven body 39. is engaged with the rack 39a. The small diameter gear 41b of the different diameter pinion 41 is the large diameter gear 4
A rack 42 has a diameter half that of 1a and has the same number of teeth, and is fixed within the player body 1a.
It meshes with the

Therefore, when the driving body 38 is displaced by a distance l, the driven body 39 is displaced by 2l with respect to the driving body 38, and the guide rod 40 is displaced by 3l by adding the displacement l of the driving body 38. become. Therefore, Δh that the pin 38a receives from the cam groove 24a
The height change is due to the following height change:
It can be expanded to a height change of 3Δh of 9.

Here, two rollers 43 are provided on the left side surface of the driven body 39 of the triple speed magnifying mechanism 37, and these rollers 43 sandwich a connecting rod 44 protruding from the back surface of the disk lifter 9a. . Therefore, the disc lifter 9a can be moved up and down along the guide rod 13 as the driven body 39 is displaced.

When the disc 3 has been raised to the upper limit position by the disc lifter 9a, insert your finger into the gap between the lid 2 and the player body 1a, and press the notch 9 in the inner lid 9.
By hooking your fingertip into the central hole via c,
It can be taken out easily.

On the other hand, when installing the disc 3, the disc 3 is dropped between the open lid 2 and the player body 1a, and the disc 3 is inserted into the disc guide 1.
After confirming that the disc is placed on the disc lifter 9a, the play button 4 is pressed. As a result, the motor 16 is started in reverse, and the disk 3 is loaded by the reverse operation to that used when the disk 3 is taken out.

That is, when the lid 2 begins to close, the disc lifter 9a descends and the central hole of the disc 3 faces the disc clamper 8a, and then the outer lid 8 matches the inner lid 9 against the compression spring 11, and the platter 12 Clamping of the disk 3 to the disk 3 is completed.

Here, just before the lid 2 is completely closed, the cam gear 2
4 becomes difficult to disengage from the small gear 22a with which it had been meshed, resulting in an offset state. For this purpose, as shown in FIG. 4, a long hole 45 is formed in the cut and raised portion of the outer lid 8, and a pin 46a on a lever 46 pivotally supported on the left side of the player body 1a is inserted into this long hole 45. When engaged, the end of the lever 46 is biased by a tension spring 47 in the direction in which the lid 2 is closed. Therefore, even if the power transmission from the motor 16 via the small gear 22a is cut off just before closing, the lid 2
can be completely closed by the force of the tension spring 47.

The tension spring 47 is arranged in such a position that the lever 46 changes its direction of action so that when the lid 2 is opened, the force acting in the direction of closing the lid 2 gradually weakens.

Further, when the lid 2 is closed, the roller 24b provided at the end of the maximum diameter part of the cam gear 24 moves to the angle 2.
9 is pushed to turn the angle 29 in a predetermined direction, and the rear end step of the cam gear 24 comes into contact with the leaf spring 30b. Further, the claw 29a provided on the angle 29 is engaged or semi-engaged with the ratchet 28a. Note that the pawl 29a that has been semi-engaged with the ratchet 28a becomes fully engaged with the ratchet 28a as the ratchet 28a rotates the next time the lid 2 is opened.

As described above, the lid 2 can be opened and closed by rotating the motor 16 in the normal or reverse direction, but the lid 2 can also be opened and closed manually once it has been closed. In that case, first, the power button 7 for turning the power switch 48 on and off is pressed to turn the power switch 48 off. The slider 7a connecting the power button 7 and the power switch 48 is connected to the slider 32 via a reversing lever 49. Therefore, as the slider 7a moves forward, the slider 32 moves backward, as described above.
The lock levers 17 and 18 release the lock on the outer cover 8.

Note that the pin engagement portions of the lever 30 and the slider 32 are provided with play so that the pin 30c is loosely inserted into the elongated hole 32a, so that the power button 7
The lever 30 can be prevented from being affected by the retreat of the slider 32 when the lever is turned off.

Also, when the lid 2 is unlocked by the lock levers 17 and 18 by turning off the power button 7 and the lid 2 is opened by hand, the force of the hand is applied to the cam gear 2.
4 to the small gear 22a, but the gear 2
Since the small gear 22a slips and rotates relative to the lid 2, the lid 2 can be opened easily without using much force.

As explained above, according to the compact disk player of the present invention, the disk clamper is fixed to the outer cover, the disk lifter is provided to the inner cover so as to be movable up and down, and the expansion mechanism guided by the cam provided on the outer cover allows Since the disk lifter is configured to move up and down, the disk can be moved up and down along the inner cover along with the opening and closing operations of the outer cover, and depending on the shape of the cam, after the disk inside the inner cover has descended to a predetermined position, The disk can be clamped by a disk clamper, which enables reliable clamping. Similarly, the disk can be raised after the disk is unclamped to ensure that the disk is clamped securely. Furthermore, since the disk lifter magnifies and transmits the displacement of the cam, it has excellent effects such as being able to raise the disk to a sufficient height even if the opening angle of the outer cover is limited. play.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the compact disc player of the present invention, FIGS. 2 to 4 are a plan view, a front view, and a left side view of the compact disc player, respectively, and FIG. FIG. 6a is an exploded perspective view of the mechanism for lifting and lowering the disk, and FIGS. 6b and c show the main parts of the mechanism in FIG. 6a when the lid is closed and opened. 7 to 9 are diagrams for explaining the opening and closing operations of the lid, respectively. 1... Compact disk player, 1a...
Player body, 2... Lid, 3... Disc, 7...
...Power button, 8...Outer lid, 8a...Disk clamper, 9...Inner cover, 9a...Disc lifter, 1
DESCRIPTION OF SYMBOLS 1... Compression spring, 12... Platter, 15... Lock mechanism, 16... Motor, 17, 18... Lock lever, 21... Gear, 22... Friction clutch plate, 24... Cam gear, 24a... Cam groove, 28
a... ratchet, 30... lever, 30b...
Leaf spring, 32...Slider, 37...3x speed enlargement mechanism, 38...Driver, 38a...Guide, 39
... Driven body, 41 ... Different diameter pinion.

Claims (1)

[Scope of utility model registration request] a player main body for playing compact discs; an outer lid provided on the front of the player main body so as to be openable and closable and having a disc clamper for clamping the compact disc at a playing position; An inner lid having a disk lifter that raises and lowers a disk, a cam provided on the outer lid, a guide guided by the cam, and an enlargement mechanism that magnifies the displacement of the guide and transmits it to the disk lifter. A compact disk player consisting of: