JPH0441490Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a player for a digital disc such as a compact disc, and more specifically, to both a disc rack and a pick-up in which a digital disc is placed and moved in the storage/unloading direction. The present invention relates to the structure of a drive unit that drives each of the parts to move the parts.

<Prior art> A compact disc player is equipped with a disc rack on which the disc is placed and moved in the storing/unloading direction, a pick-up rack on which a pick-up is mounted and moved in the scanning direction, etc. When the disk is placed on the protruding disk rack and the switch is turned on, the disk rack is retracted and the disk is set on the turntable. Along with this setting, the disk is rotated by the drive of the spin motor. At the same time, the pick-up begins to move, and while the pick-up moves from the innermost circumference position to the outermost circumference position of the disk and scans it, the contents recorded on the disk are reproduced.

By the way, conventional players of this type are equipped with two motors, one for moving the disk rack and the other for moving the pick-up, corresponding to the disk rack and the pick-up platform, respectively, and these motors move the disk rack and the pick-up platform. Each one was driven and moved separately. For this reason, conventional players required a large number of motors, and these motors had the disadvantage of increasing costs.

<Purpose of the invention> The present invention was devised in view of the above-mentioned problems, and aims to reduce costs by reducing the number of motors required by using a motor for moving a disk rack and a motor for moving a pickup. The aim is to reduce this.

<Configuration of the invention> In order to achieve the above object, the present invention includes a disk rack on which a disk is placed and moves in the storage/unloading direction, and a disk rack that is movable a predetermined distance relative to the disk rack. In a digital disk player equipped with a rack slider connected to the disk rack, and a pick-up rack mounted with a pick-up and moved in the scanning direction thereof, a pinion rotates by the drive of a motor to move the rack slider in the storage/unloading direction. A partially toothed gear is provided opposite to the gear, a pinion gear for moving a pick-up rack is interlocked with the partially toothed gear, and a pinion gear for moving a pick-up rack is connected to the rack slider. A rotating pushing part is provided, and as the rack slider moves, the pushing part pushes the passive part and rotates the partially toothed gear by a required small angle, whereby the partially toothed gear and the rack slider side pinion gear are rotated. They are linked together, or the linkage is cut off.

<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings. Fig. 1 is a longitudinal sectional view of the player of the present invention, and Figs. 2 to 5 are all Fig. 1-
Fig. 2 shows the state before the disk is loaded, Fig. 3 shows the state when the disk rack has been moved, Fig. 4 shows the state when the pick-up is moved, and Fig. 5 shows the state before the disk is loaded. Each shows the state of the disc at the end of playback. The player is equipped with a chassis 1, a turntable 3 rotatably driven by a spin motor 2, a disk rack 5 on which a disk 4 is placed and moved in the storage/unloading direction, and a pick-up 6, and rotates in the scanning direction. the pick-up rack 7 and the disk rack 5
and a single motor 8 for driving both the pickup 6 and the pickup 6.

The disc rack 5 is supported on the chassis 1 by a holder 9, and is slidable between a predetermined position on the chassis 1 and a position protruding forward of the player body, and is moved in the direction of entering and leaving the player body from the outside. (direction B in Figure 2), the disc 4 placed thereon is housed on the turntable 3, and the disc 4 placed on it is housed in the direction of protrusion from the player body (direction A in Figure 2). ), the disc 4 is carried out from the turntable 3 to the outside.

This disc rack 5 is provided with a rack slider 10 that can move in the same direction as the disc rack 5 (the A direction and the B direction). This rack slider 10 is provided with a long hole 11 as shown in FIGS. 2 to 5, and a mounting shaft 12 that fits into the long hole 11 is attached to the lower surface of the disk rack 5 in a hanging manner. By fitting the long hole 11 and the mounting shaft 12, the rack slider 10 and the disc rack 5 are connected in such a manner that they can move relative to each other by a predetermined distance.

Reference numeral 13 denotes a lock lever for coupling the disc rack 5 and the rack slider 10 in a desired relative positional relationship, and is pivotally connected to the disc rack 5 by a shaft 14 so as to be swingable, and is swung toward the rack slider 10 by a spring. It has increased elasticity. 13a is an engagement pin protruding from the end of the lock lever 13 on the rack slider 10 side;
is an engagement pin protruding from the opposite end of the lock lever. A recessed step 15 is formed on the side edge of the rack slider 10, with which the engagement pin engages.On the other hand, the chassis 1 has a smooth portion 16b located parallel to the rack slider 10 and an end portion of the smooth portion 16b. A guide 16 is fixed having an engaging step portion 16a extending in a bent manner through a corner portion 16c.

17 is a pinion gear that drives the rack slider 10, and this pinion gear 17 has rack teeth 10a formed on the side edge of the rack slider 10.
and is interlocked with the drive gear 18 of the motor 8 via a group of reduction gears. The reduction gear group includes a large diameter and a small diameter first stage intermediate gear 19.
a, 19b, and large diameter and small diameter second stage intermediate gears 20a, 20b, the first stage large diameter intermediate gear 19a meshes with the driving gear 18, and the second stage small diameter intermediate gear 20b meshes with the drive gear 18. It meshes with a transmission gear 21 coaxially integrated with the pinion gear 17.

Support shaft 22 of the second stage intermediate gears 20a, 20b
In this case, an internal tooth type partially toothed gear 23 is connected to the second stage intermediate gear 2.
0a and 20b are pivotally supported so as to be able to rotate relative to each other. The tooth portion 23a of the partially toothed gear 23 can mesh with the transmission gear 17;
Depending on the rotation angle, the toothless portion 23b faces the transmission gear 17, and the transmission gear 17 and the toothless gear 23 are disengaged.

Reference numeral 24 denotes a pinion gear for driving the pick-up plug 7, and this pinion gear 24 meshes with a rack tooth 7a formed on a side edge of the pick-up plug 7. Moreover, this pinion gear 24 is
It is interlocked and connected to the partially toothed gear 23 via a large diameter first intermediate gear 25 that meshes with the partially toothed gear 23 and a small diameter second intermediate gear 26 that is coaxially integrated with the first intermediate gear 25 .

Furthermore, two pin-shaped passive parts 27 and 28 are formed on the partially toothed gear 23. These passive parts 27 and 28 hang down from the lower surface of the partially toothed gear 23 so as to face the upper surface of the rack slider 10. 2
Reference numeral 9 denotes a pushing part that comes into contact with and pushes the driven parts 27 and 28, and is formed to protrude from the upper surface of the rack slider 10. However, both passive parts 27, 2
8, one of the passive parts 27 is the rack slider 1.
As the rack slider 10 moves in the retracting direction, it is pushed in the same direction by the pushing part 29, and the other passive part 28 is pushed in the protruding direction as the rack slider 10 moves in the protruding direction. be.

In FIG. 1, 30 is a support piece for the disk 4 provided on the disk rack 5, 31 is a hood, and 32 is a clamp for pressing the disk 4 onto the turntable 3.

In the above configuration, before setting the disk 4, as shown in FIG.
is located in a protruding position at the front of the player body,
The rack slider 10 is in a position where it protrudes to the maximum extent possible with respect to the disc rack 5. In this state, the other engaging pin 13b of the lock lever 13
contacts the smooth portion 16b of the guide 16 on the chassis 1 side, and the lock lever 13 is restrained from swinging counterclockwise toward the guide 16.
One of the engagement pins 13a of 3 is connected to the rack slider 10.
The lock lever 13 connects the rack slider 10 and the disc rack 5 in the retracting direction, and when the rack slider 10 retracts, the disc rack 5 follows. It is now possible to enter and exit the building.

When the disk 4 is placed at a predetermined position on the disk rack 5 and a set switch (not shown) is turned on, the motor 8 rotates and the drive gear 18 rotates counterclockwise in FIG. 2. This rotational force is transmitted to the pinion gear 17 via the first stage intermediate gears 19a, 19b, the second stage intermediate gears 20a, 20b, and the transmission gear 21.
rotates clockwise. As a result, the rack slider 10 slides in the retraction direction B. At this time, since the disk rack 5 is connected to the rack slider 10 in the retracting direction as described above, the disk rack 5 also moves in the same direction.

On the other hand, on the side of the partially toothed gear 23, the transmission gear 2
1, the toothless part 2 of each part of the toothless gear 23
3b is facing, the transmission gear 21 and the partially toothed gear 23 do not mesh with each other, and the partially toothed gear 23 does not rotate. Therefore, the rotational force of the motor 8 is not transmitted to the pinion gear 24 on the side of the pick-up plug 7, and the pick-up plug 7 is stopped at a fixed position.

When the disk rack 5 moves a certain distance in the retraction direction B, as shown in FIG.
Since the end portion of is received by the stopper 33, it will not move back any further. The disk 4 is now located at a predetermined position on the turntable 3, and the movement of the disk rack 5 when storing the disk is completed. The disk 4 is lowered by the pressure of the clamp 32 and set on the turntable 3. When the movement of the disk rack 5 is completed, one coupling pin 13b of the lock lever 13 just comes into contact with the corner portion 16c of the guide 16.

Then, when the motor 8 is further rotated and the rack slider 10 continues to move in and out, one coupling pin 13b of the lock lever 13 goes around from the corner part 16c of the guide 16 to the engagement step part 16a side, and the lock lever 13 is reversed. The lock slider 10 swings clockwise, and the other engaging pin 13a comes out of the recessed stepped portion 15 of the rack slider 10. As a result, the rack slider 10 and the disc rack 5 are uncoupled, and the rack slider 10 can move in the retracting direction B regardless of the disc rack 5. Therefore, the rack slider 10 continues to move in the retracting direction by the drive of the motor 8.

When the rack slider 10 continues to move in the retracting direction and retracts a certain distance, the pushing part 29 of the rack slider 10 comes into contact with one of the passive parts 27 and moves it back. Since the toothless gear 23 rotates by a small angle clockwise, the toothless portion 23b of the toothless gear 23 moves away from the transmission gear 21, and the toothless gear 23 rotates by a small angle clockwise.
1 faces the tooth portion 23a, and the transmission gear 21 and the partially toothed gear 23 mesh with each other. Through this meshing, the rotational force of the motor 8 is transmitted to the partially toothed gear 23, and the partially toothed gear 23 rotates. Along with this, toothless gear 2
The first intermediate gear 25 meshing with the pick-up rack 7 rotates, and the pinion gear 24 on the pick-up plug 7 side rotates. As a result, the pick-up rack 7 also moves in a certain direction (in this embodiment, the same direction as the retracting direction B of the disk rack), and the pick-up 6 mounted on the pick-up rack 7 is moved to the innermost circumferential position of the disk 4. to the outermost position. Along with this movement, the recorded contents of the disk 4 are reproduced. When the pick-up 6 reaches the outermost position of the disk 4, a detection means (not shown)
is detected and the drive of the motor 8 is stopped.

Next, the operation for unloading the disc 4 that has been played will be explained. The operation in this case is basically the opposite of the above operation. When the playback of the disk 4 is completed, the disk rack 5 and the pick-up rack 7 are at the fully retracted position, as shown in FIG. It is in the position you entered. Further, one driven portion 27 of the partially toothed gear 23 is deviated from the locus of movement of the pushing portion 29, and the other driven portion 28 faces on the locus of movement of the pushing portion 29.

As a result, the motor 8 rotates in the opposite direction, and the driving gear 18
rotates clockwise. As a result, the pinion gear 17 on the rack slider 10 side rotates counterclockwise. This causes the rack slider 10 to move in the protruding direction. At this time, since the engagement pin 13a of the lock lever 13 has come off the recessed step 15 of the rack slider 10, the connection between the rack slider 10 and the disc rack 5 is released, and the rack slider 10 protrudes regardless of the disc rack 5. can move in the direction. Further, since the other engagement pin 13b of the lock lever 13 is engaged with the engagement step 16a of the guide 16, the movement of the disc rack 5 in the protruding direction is restrained by this engagement, and the disc rack 5 is It is stopped at the exit position.

As described above, when the pinion gear 17 on the rack slider 10 side rotates counterclockwise, the transmission gear 21 also rotates in the same direction. Since this transmission gear 21 meshes with the partially toothed gear 23, the partially toothed gear 23
rotates counterclockwise. Therefore, the pinion gear 24 on the side of the pick-up rack 7 rotates clockwise, and the pick-up plug 7
Since it slides in the same direction as the protrusion direction of 0,
The pick-up 6 moves from the outermost position of the disk 4 to the innermost position.

When the pick-up 6 reaches the innermost peripheral position of the disk 4, the end of the tooth portion 23a of the partially toothed gear 23 has reached the position of the transmission gear 21. Also, at this time, the pushing part 29 on the rack slider 10 comes into contact with the passive part 28 of the partially toothed gear 23 and pushes it, so the partially toothed gear 23 rotates counterclockwise and its teeth 23a It comes off from the transmission gear 21, and the toothless portion 23b faces the transmission gear 21. Since the transmission gear 21 and the partially toothed gear 23 are disengaged in this way, the pinion gear 24 on the side of the pick-up rack 7 no longer rotates, and the movement of the pick-up 6 is stopped.

When the movement of the pick-up 6 stops, the lock lever 13 is
When the engaging pin 13a of the lock lever 13 enters the recessed step 15 of the rack slider 10, the lock lever 13
swings clockwise, and the other engagement pin 13b of the lock lever 13 is disengaged from the engagement step 16a of the guide 16. As a result, the lock of disk rack 5 to chassis 1 is released, and disk rack 5 is unlocked from chassis 1.
becomes able to move in the protruding direction. At this time, the rack slider 10 has protruded to the maximum extent relative to the disc rack 5, and
The mounting shaft 12 of the rack slider 10 has an elongated hole 1.
It has reached the end of 1. Since the rack slider 10 continues to move in the protruding direction as described above,
The disk rack 5 has a long hole 11 and a mounting shaft 12.
It is pulled by the rack slider 10 via the rack slider 10 and moves in the projecting direction. When the disc rack 5 moves to a predetermined protruding position, this is detected by a detection means (not shown) and the drive of the motor 8 is stopped. In this way, the disk 4 on the disk rack 5 is carried out to the front of the player body, and the disk rack 5, rack slider 10, pick-up rack 7 and pick-up 6 return to the state shown in FIG. 2 before the disk was loaded.

<Effects of the invention> As described above, according to the invention, the disk rack and the pick-up rack are driven and moved separately by a single motor, and the storage/unloading operation of the disk and the movement operation of the pick-up are performed. Therefore, there is no need to provide two motors, one for moving the disk rack and one for moving the pickup, as in the past, and the number of required motors can be reduced, thereby reducing the cost of the player.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of the player of the present invention, Figures 2 to 5 are cross-sectional views along the line shown in Figure 1, Figure 2 shows the state before the disc is loaded, and Figure 3 shows the disc. FIG. 4 shows the state at the time of the movement of the pickup, and FIG. 5 shows the state at the end of the disk playback. 1... Seat, 3... Turntable, 4...
...Disk, 5...Disc rack, 6...Pickup, 7...Pickup rack, 8...Motor, 10...Rack slider, 17...Rack slider side pinion gear, 23...Cut-tooth gear, 2
4... Pick-up plug side pinion gear, 2
7, 28...passive part, 29...pushing part.

Claims (1)

[Scope of utility model registration request] A disk rack on which a disk is placed and moved in the storage/unloading direction; a rack slider coupled to the disk rack so as to be able to move a predetermined distance relative to the disk rack; and a rack slider on which a pickup is mounted and moved in the scanning direction In a digital disk player equipped with a pick-up rack that moves in a direction, a gear with missing teeth is provided opposite to a pinion gear that is rotated by the drive of a motor and moves the rack slider in the storing/unloading direction. A pinion gear for moving the rack is interlocked and connected to the rack slider, and the gear is interlocked with the pinion gear on the rack slider side by pushing the passive part of the toothless gear and rotating the toothless gear by a required small angle. A digital disc player characterized in that it is provided with a pushing part that allows the movement to move or interrupts the interlocking movement.