JPS6355148B2 - - 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 main body is roughly divided into two types: a type in which a disk mounting plate slides, and a type in which a lid is opened and closed centering on the lower end.

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 raising and lowering the disc dropped between the lid and the player body, and clamping the disc, which can lead to malfunctions and breakdowns. There were drawbacks such as being easy to use.

The present invention eliminates the above drawbacks, and uses a cam that rotates forward or reverse by motor power to perform three types of operations: unlocking the lid, opening and closing the lid, and raising and lowering the disk inside the lid. It is an object of the present invention to provide a compact disc player which has an extremely simple structure and allows reliable loading and unloading of discs.

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

FIG. 1 is a schematic perspective view showing one 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. 6 is an exploded perspective view of the mechanism for lifting and lowering the disk, and FIGS. 7 to 9 are side views of essential parts for explaining the opening and closing operations of the lid.

In FIG. 1, the compact disc player 1 is
There is a lid 2 on the left side of the front of the player body 1a.
The play button 4, stop button 5, eject button 6, etc. necessary for playing the disc 3 are
The power button 7 is located on the right side of the front face, and the power button 7 is located on the left shoulder corner.

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 cover 9, and is provided so that a fingertip can be inserted into the center hole of the disk 3 from behind the inner cover 9 when the disk lifter 9a is at the highest position. It is something that

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 opens or closes depending on 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, the eject button 6 must be pressed in order to take out the disc 3 from inside the player body 1a.

When the eject button 6 is pressed, the motor 16 is energized and starts rotating forward. At this time, the forward rotation power of the motor 16 is transmitted from the pulley 20 to the pulley 21 via the rubber belt 19, as shown in FIGS.
is transmitted to the cam plate 23 having external teeth meshing with the
The cam plate 23 rotates. As shown in FIG. 4, this cam plate 23 has a cam wall 24 formed with cam curves in the forward direction and the height direction on its left side, and a cam groove 25 with a spiral cam curve. are provided on the right side.

The cam wall 24 guides an L-shaped cam lever 26 whose one end abuts against the radial cam surface via a roller 26a, and when the roller 26a rides on the large-diameter cam surface, the cam lever 26 has its other end fall back. The rear end of a slider 27 is locked to the other end of the cam lever 26.
When pulled backward, the pair of lock levers 17,
18 are adapted to open around support shafts 17b and 18b, respectively.

That is, the left lock lever 17 is connected to the tip of the slider 27 by an L-shaped transmission lever 28, and as the slider 27 moves backward, the transmission lever 28 rotates.
is pushed by the roller 28a of the transmission lever 28 and opens in the unlocking direction against the force of the spring 29.

On the other hand, the right lock lever 18 is connected to the middle part of the slider 27 by an L-shaped transmission lever 30 and a rod 31. When the slider 27 moves backward, the transmission lever 30 rotates, and the rod 31 moves to the left. As a result, the right lock lever 18 is pulled by the spring 3.
2 and opens in the unlocking direction.

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.

The cam wall 24 of the cam plate 23 is for unlocking the lid 2, whereas the cam groove 25 of the cam plate 23 is for unlocking the lid 2.
is for the opening/closing operation of the unlocked lid 2.

That is, the pin 33a guided by the cam groove 25
The tip of the swinging lever 33 has a slider 34.
It is engaged with the rear end of the slider 34, and the tip of the slider 34 is connected to the left side of the outer lid 8 with a pin. Therefore, as the cam plate 23 rotates, the swing lever 33 swings, and the slider 34 moves forward, so the outer cover 8 rotates around the support shaft 10 and opens to a predetermined forward tilt state.

Here, the inner cover 9 is displaced together with the outer cover 8, but as shown in FIG. 8, it remains at the stop position until the outer cover 8 opens to a certain angle. This is because after the disk clamper 8a completely releases the clamp on the disk 3, the inner cover 9 begins to open, and the rise of the disk 3, which will be described later, is caused by the disk clamper 8a.
This is to avoid being hindered by the In this embodiment, after the locking portions 8b and 9b are locked with each other, the inner cover 9 is pulled by the outer cover 8 and begins to open, eventually reaching the state shown in FIG. 9.

A fan-shaped cam plate 35 is attached to the left side of the outer lid 8, and a cam groove 36 having a sine-shaped cam curve is formed on the side surface of the cam plate 35. A pin 38a provided on the drive body 38 of the triple speed enlargement mechanism 37 is engaged with this cam groove 36.
By guiding the driving body 38 via the pin 38a, the driven body 39 moves up and down at three times the speed of the driving body 38. Drive body 38 and driven body 3
9 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 drive body 38 is connected to the driven body 3.
9 meshes with the rack 39a on the right side. The small diameter gear 41b of the different diameter pinion 41 is the large diameter gear 41a.
It has half the diameter and the same number of teeth,
It meshes with a rack 42 fixed within the player body 1a. Therefore, when the driving body 38 is displaced by a distance l, the driven body 39 is 2l relative to the driving body 38.
and the drive body 3 is displaced relative to the guide rod 40.
The displacement l of 8 is added, resulting in a displacement of 3l. Therefore, a height change of Δh that the pin 38a receives from the cam groove 36 can be changed into a height change of 3Δh of the driven body 39 of the triple speed enlarging mechanism 37.

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.

By the way, when the cam plate 23 reaches its rotation limit position, as shown in FIG. It operates by detecting a change in the height of the wall 24. As a result, when the switch 45 is activated, the motor 16 is de-energized and stopped. At this time, the lid 2 is in the most forward tilted state,
The disk 3 is at the most pushed up position by the disk lifter 9a.

Therefore, by inserting a finger into the gap between the lid 2 and the player body 1a and placing a finger on the central hole of the disc 3 through the notch 9c of the inner lid 9, the disc 3 can be easily pulled out.

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.

The rotation limit position of the cam plate 23 when the motor 16 is reversed is determined when the remaining switch 46 of the switches 45 and 46 detects a change in the height of the cam wall 24, as shown in FIG. It is detected by operating the When the switch 46 is operated, the motor 16 is de-energized, and all operations related to mounting the disk 3 are completed.

Here, to install the disk 3, press the play button 4.
By pressing , the motor 16 was started in reverse, but instead of the play button 4, the open lid 2
The motor 16 is also configured to be able to be started in reverse by slightly pushing in the closing direction.

That is, the fan-shaped cam plate 35 is provided with a protrusion 35a for detecting a lid pushing operation, and this protrusion 35a is connected to a switch 47 for detecting a lid pushing operation provided on the side of the cam plate 35. When separated,
The configuration is such that the switch 47 is operated to start the motor 16 in reverse. Note that the lid 2 shown in FIG.
In the most inclined state, the protrusion 35a abuts the switch 47 to keep it inactive.

Furthermore, the slider 34 connecting the lid 2 and the swinging lever 33 has some play in its connecting portion with the swinging lever 33, so that the lid 2 can be closed by hand. That is, the slider 34 with which the connecting pin 33b implanted in the swing lever 33 engages.
The engagement hole 34a of the slider 34 is a long hole.
Even if the lever is moved backward to some extent by hand, the swing lever 33 is not affected.

As explained above, according to the compact disk player of the present invention, a cam that rotates forward or backward electrically is used to unlock the lid, open and close the lid, raise and lower the disk within the lid, and even stop the cam itself. Since various operations such as position detection are performed, a single forward/reverse motor can be used as the power source, and the relationship between each operation can be determined in a predetermined order once each cam curve of the cam is determined. Therefore, for example, when opening the lid, the lid is unlocked, the lid is opened, and after the disc clamp is released, the disc can be reliably pushed up when the lid is opened to a certain extent, and the disc can be pushed up again. Since the mounting of the disk can be performed in the reverse order of the removal of the disk, excellent effects such as reliable mounting can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing one 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. 6 is an exploded perspective view of the mechanism for lifting and lowering the disk, and FIGS. 7 to 9 are side views of essential parts for explaining the opening and closing operations of the lid. 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, 23... Cam plate, 24... Cam wall, 2
5... Cam groove, 33... Rocking lever, 34... Slider, 35... Cam plate, 37... Triple speed enlargement mechanism, 38... Drive body, 39... Followed body, 39a,
42...Rack, 41...Different diameter pinion.

Claims (1)

[Claims] 1. A player body with a lid for guiding the installation of a compact disc that can be opened and closed on the front, a locking mechanism that locks the lid in a closed state, and a player that rotates forward and backward by the power of a motor, and when it rotates in the forward direction, the locking mechanism locks the player. Attach the compact disc so that the lock is released, the lid is opened, the disc is raised within the lid, and when the disc is reversed, the disc is lowered within the lid, and after the lowering is completed, the lid is completely closed. A compact disk player consisting of a cam plate that regulates the operation and take-out operation.