JP3406871B2 - Disc player - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player for reproducing discs for performance and the like.

[0002]

2. Description of the Related Art When a disc such as a compact disc is played, a disc player is known which conveys the disc to a reproducing position and clamps the disc at the reproducing position to reproduce the disc. In such a disc player, the disc is clamped by raising the turntable in the direction of approaching the disc after the disc is conveyed to the reproduction position.

[0003]

However, in the conventional disc player as described above, the mechanism for raising the turntable has a moving member that receives the driving force of the motor and moves as a driving force transmitting member. However, installing other parts in the moving range of the moving member and expanding the space occupied by the moving member in the moving direction of the moving member,
There is a problem that the player as a whole becomes large due to the fact that various parts and members cannot be collectively arranged.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a disc player in which the mechanism for clamping a disc is integrated into a compact size and the entire size is reduced.

[0005]

DISCLOSURE OF THE INVENTION A disc player according to the present invention comprises a disc transporting means for transporting a disc to a reproducing position, including a tray to which the disc is attached and detached, and a disc reproducing device for clamping and reproducing the disc at the reproducing position. The disk reproducing means includes a clamper, a turntable that clamps the disk together with the clamper, and a base that supports the turntable.
An elevating means for elevating and lowering the base to move the turntable between a clamp position and a non-clamp position, the elevating means being rotatable about its center.
And a circular cam member having an inner space, and a motor for applying a driving force to the circular cam member, the base is arranged in the space including the center, and the protruding member protruding from the base is It is characterized in that it engages with a cam groove formed on the inner curved surface of the circular cam member.

[0006]

In the present invention, a circular cam member which is rotatable about its center and has an inner space is used as a driving force transmitting member in a mechanism for moving the turntable up and down, and the turntable is provided in the inner space. Since the circular cam member does not occupy a large space due to the rotation, the raising / lowering mechanism of the turntable can be concentrated almost in the area occupied by the circular cam member, and the player can be downsized. You can

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk player according to an embodiment of the present invention will be described below with reference to the drawings. 1 to 5 are views showing the overall structure of the disc player according to the present embodiment. As shown in FIGS. 1 and 2, the front portion of the player housing 1, that is, the front panel 2, extends in the left-right direction. A rectangular disc supply port 3 is formed.

Large diameter disc to be played back
The upper tray 6 and the lower tray 7, which respectively detachably carry one of the disk 4 and the small-diameter disk 5, are the disk supply port 3
It can be moved in the front-rear direction to project to the eject position J (FIG. 4) outside the player housing 1.

The X, Y, and Z directions in each figure are forward,
Right and upper are shown respectively. The disc 4 is, for example, a compact disc having a diameter of about 12 cm, and the disc 5 is
For example, a compact disc having a diameter of about 8 cm, but the diameter is not limited to the above size. Both trays 6 and 7 are arranged side by side having a surface substantially parallel to a disk carrying surface of a turntable 506 described later in the player housing 1.

Also, each tray 6, 7 has a large-diameter disc.
Large-diameter circular recesses 8 and 9 for mounting 4 are formed respectively, and small-diameter circular recesses 10 and 11 for mounting small-diameter disk 5 are formed concentrically with the circular recesses 8 and 9, respectively. Has been done.

The disc supply port 3 (FIG. 1) is provided with a pair of upper and lower doors 12 and 13 for closing the disc supply port 3 so as to be swingable, so that the trays 6 and 7 can be projected and stored. It opens and closes in synchronization with.

A switch group 14 for operating the disc player is provided on the front panel 2.

2 to 5, the circular gear portion 20 includes a plurality of (two in this embodiment) trays 6 and 7 for the disk 4 and the disk 4, respectively.
Or playback position P (Fig. 4) that is playing back 5 and this playback position P
It can be sequentially moved to a position on the front side (X direction side) and on the rear side of the doors 12 and 13, that is, a standby position W, and an eject position J protruding forward from the doors 12 and 13. It is like this.

Reference numeral 30 is a drive unit for rotationally driving the circular gear unit 20 using a motor 31 as a drive source.

A circular cam mechanism 40 is engaged with the circular gear portion 20 to rotate, and the circular cam mechanism 40 is rotated.
A cam portion for raising and lowering the pickup portion 404 (FIG. 4, FIG. 5) attached to the float base 42 is formed on the 40 according to the vertical position of the disc 4 or 5 at the reproducing position P.

With the cam portion of the circular cam mechanism 40, the disc
The clamper unit 50 that clamps 4 or 5 is moved up and down, and the clamper lifting mechanism 601 of the present embodiment supports the clamper unit 50 and engages with the cam portion of the circular cam mechanism 40 to form a circular cam mechanism. The circular cam 41 of 40 is provided with a clamper arm portion 61 that swings when the circular cam 41 rotates to raise and lower the clamper portion 50.

The upper tray 6 is placed on the upper sub-tray 15 and the lower tray 7 is placed on the lower sub-tray 16 so as to be relatively movable in the front-rear direction, and is rotated by the circular gear 23 of the circular gear portion 20. First and second pinion gears 21, 22
Are engaged with the upper sub-tray 15 and the upper tray 6, and the lower sub-tray 16 and the lower tray 7, respectively, and the circular gear 23 is rotated to rotate the upper sub-tray 15 and the upper tray.
6 is moved in the front-rear direction, and the lower sub-tray 16 and the lower tray 7 are moved in the front-rear direction.

The loading base 70 fixed in the player housing 1 includes sub trays 15 and 16, a circular gear portion 20, a driving portion 30, a circular cam mechanism 40, and a clamper portion.
50 and a clamper lifting mechanism 60 are attached. The structure of the loading base 70 is shown in FIGS. 6 to 8.

Next, the circular gear portion 20 and the circular gear portion 20
The drive unit 30 for driving the will be described. As shown in FIGS. 2 to 5, the circular gear 23 is supported rotatably around a shaft 702 in a circular recess 701 (FIGS. 2 and 6) of the loading base 70.

A continuous internal gear 201 (FIGS. 2 and 21 (a)) is formed on the entire inner surface of the lower surface of the circular gear 23, and is rotatable about a shaft 704 in a recess 703 of the loading base 70. A small gear 203 of an idler gear 202 (FIG. 9) supported by the gear meshes with the internal gear 201.

The recess 730 of the loading base 70 (see FIG. 2, FIG.
A motor 31 as a drive source is fixed to the lower surface of 6) with the output shaft 301 facing upward.
A pulley 302 fixed to the shaft and a gear pulley rotatably supported by a shaft 705a (FIG. 6) of the recess 705 of the loading base 70.
A rubber belt 304 is wound around 303 (FIG. 10). Gear 305 of this Gear Buri 303 and idler gear
The large gear 204 of 202 is meshed.

Therefore, when the motor 31 rotates, the gear pulley 303 rotates via the pulley 302 and the belt 304, and then the gear 305 of the gear pulley 303 and the idler gear.
The rotational force is transmitted to the internal gear 201 of the circular gear 23 via the large gear 204 and the small gear 203 of 202, and the circular gear 23 rotates.

The first pinion gear 21 shown in FIGS. 11 (a) to 11 (c) and the second pinion gear 22 shown in FIGS. 12 (a) to 12 (c) are formed by a shaft 70 projectingly formed on the loading base 70.
It is rotatably supported by 7, 708 respectively.

Circular gear 23 and first and second pinion gears 21, 22
Between the follow gear shown in Figs. 13 (a) and 13 (b).
205 and 206 are installed respectively. That is, the follow gears 205 and 206 are rotatably supported by the pair of shafts 706 (FIG. 6) provided on the loading base 70.

The small gear 207 of the one follow gear 205 intermittently meshes with the discontinuous external gear 208 of the circular gear 23, and the large gear 209 meshes with the lower gear 210 of the first pinion gear 21. .

The small gear 211 of the other follow gear 206 intermittently meshes with the external gear 208 of the circular gear 23, and the large gear 2
Reference numeral 12 meshes with the lower gear 213 of the second pinion gear 22.
In this embodiment, both follow gears 205 and 206 have the same shape.

Upper sub-tray 15 (FIGS. 17 and 18) on which the upper tray 6 (FIGS. 14 to 16) slides in the front-back direction
Is a plurality of protrusions formed inwardly of the left and right side walls 709 and 710 of the loading base 70 and arranged in the front-rear direction.
The support pieces 711a and 711b (for example, three pairs) and the plurality of support pieces 712a and 712b (for example, three pairs) are guided while being restricted in vertical movement and are slidable in the front-rear direction (FIG. 7). ).

Racks 101 and 102 are formed on the left side surfaces of the upper tray 6 and the upper sub-tray 15, respectively.
101 and 102 can be meshed or not meshed with the upper gear 214 of the first pinion gear 21. The upper gear 214 has a width such that it can mesh with both racks 101 and 102.

Lower sub-tray 16 (FIGS. 17 and 18) on which the lower tray 7 (FIGS. 19 and 20) slides in the front-back direction
Is a plurality of protrusions formed inwardly of the left and right sidewalls 709 and 710 of the loading base 70 and arranged in the front-rear direction.
(For example, three) support pieces 713 and a plurality of (for example, three) support pieces 7
It is slidable in the front-rear direction by being guided while the vertical movement is restricted by 14 and (Fig. 7).

Racks 103 and 104 are formed on the right side surfaces of the lower tray 7 and the lower sub-tray 16, respectively.
The 103 and 104 can be meshed or non-meshed with the upper gear 215 of the second pinion gear 22. The upper gear 215 has a width such that it can mesh with both racks 103 and 104. In this embodiment, the upper sub-tray 15 and the lower sub-tray
Although 16 has the same shape as shown in FIGS. 17 (a) and 17 (b), it may have different shapes. The circular gear 23 will be described with reference to FIG. 21. An internal gear 201 for meshing with the small gear 203 of the idler gear 202 to drive the circular gear 23 to rotate is continuous over the entire inner circumference of the lower surface of the circular gear 23. Is formed.

Further, in order to intermittently mesh with the small gears 207, 211 of the pair of follow gears 205, 206, the above-mentioned external gear 208 is provided with the tooth portions 208 formed separately at predetermined positions.
It consists of a, 208b, and 208c, and each sub-tray 15, 16
Also, the trays 6 and 7 can be sequentially moved in the front-rear direction.

Further, the circular gear 23 has a single circular cam.
Tooth portions 216 and 217 (Fig.
21 (b)) is formed. That is, the tooth portion 216 temporarily meshes with the tooth portion 401 (FIG. 22) of the circular cam 41, and the tooth portion 217 temporarily meshes with the tooth portion 402 (FIG. 22) of the circular cam 41, Separately formed at predetermined positions.

Next, the circular cam 41 and the float base 42 that moves up and down by the rotation of the circular cam 41 will be described with reference to FIGS. 22 to 27. The circular cam 41 is fitted in a circular recess 733 (FIG. 6) formed in the loading base 70 so as to be rotatable around a center 734 of the circular recess 733.

The above-mentioned tooth portion 40 formed on this circular cam 41
By temporarily meshing the teeth 1 and 402 with the teeth 216 and 217 of the circular gear 23, the circular cam 41 is intermittently rotated around the center 734. Further, the float base 42 is provided on the inner peripheral surface portion 403 (FIG. 22) of the circular cam 41.
Pickup unit 404 and turntable 5 fixed on top
Three V-shaped cam grooves 405 (Fig. 26) are formed as positive movement cams that constitute a cam portion that raises and lowers 06 (Figs. 4 and 5).

The float base 42 includes a pickup section 40.
4 and 4 columns 406 for mounting the evening table 506
Is formed so as to project upward, and guide pieces 407, 408, 409 are formed so as to project outward, respectively.

The guide pieces 407 to 409 are slidably engaged in the three cam grooves 405 of the circular cam 41, respectively.
The pair of left and right guide pieces 407 and 408 are loading bases.
The long groove 715, 716 formed in the vertical direction of the 70 is vertically engaged with the float base 42 so that the float base 42 does not rotate and can only perform the vertical movement.

A projecting piece 410 is formed on the front side of the float base 42 so as to extend upward.
Is the positioning holes 10 of the upper tray 6 or the lower tray 7 in the reproduction position when the float base 42 is in the raised position.
5 (FIG. 14) or 106 (FIG. 19 (a)) is inserted into the pickup unit 404 and the turntable 506 and each tray during reproduction.
The relative positions of 6 and 7 are not displaced.

Further, the right upper surface of the circular cam 41 is engaged with a clamper elevating mechanism 60 for elevating and lowering the clamper section 50 to perform the above-mentioned ascending / descending operation, as a cam groove constituting a positive cam. 411 is formed. This cam groove 411
Has a small-diameter groove portion 411a and a large-diameter groove portion 411b continuous with the small-diameter groove portion 411a and located outside the small-diameter groove portion 411a.

Next, the clamper elevating mechanism 60 for elevating the clamper section 50 will be described with reference to FIGS. 28 to 32. As illustrated, the clamper arm portion 61 provided in the clamper lifting mechanism 60 has a first clamper arm 601 and a second clamper arm 602. In the first clamper arm 601, a pair of front and rear support shafts 603 are provided on the loading base 70.
The concave shaft support portions 717 and 718 (FIG. 6) are fitted to each other so that they can swing around the support shaft 603 (FIG. 28 (b)).

Further, the clamper holder 501 of the clamper unit 50
A pair of support pieces 604 are formed so as to project inwardly toward each other in order to support the circular opening 605.
A pair of front and rear grooves 502 of the clamper holder 501 housed inside
The clamper holder 501 is supported by being removably and swingably engaged in (FIG. 20A).

Further, an engaging piece 606 that slidably engages with the cam groove 411 of the circular cam 41 is formed on the lower portion of the first clamper arm 601 so as to project downward. As a result, the circular cam 41 rotates, and the engaging piece 606 reciprocates between the small diameter groove portion 411a and the large diameter groove portion 411b of the cam groove 411, so that the first clamper arm 601 rotates around the support shaft 603. It will swing to.

As shown in FIGS. 29 to 31, in the second clamper arm 602, the pair of left and right support shafts 607 are fitted into the pair of concave shaft support portions 719 (FIG. 6) of the loading base 70 to support the support shafts. It is swingable around 607 (Fig. 30).

In order to support the clamper holder 501 in cooperation with the first clamper arm 601, a pair of left and right support pieces 608 are formed so as to project inward from each other.
Supports the clamper holder 501 by detachably and swingably engaging in a pair of left and right grooves 503 (FIG. 32) of the clamper holder 501 housed in the opening 609.

Therefore, when the first clamper arm 601 oscillates and the clamper holder 501 moves up and down, the second clamper arm 602 also keeps the clamper holder 501 in a horizontal state, and around the support shaft 607. It will swing.

The second clamper arm 602 has its one end locked to the engaging piece 610 (FIG. 29) and the other end constantly pulled downward by the tension spring 611 (FIG. 2) supported by the loading base 70. Being energized.

Further, as shown in FIG. 2, the clamper holder 501 has an annular clamper 50 formed by a disc member 504.
5 is fixed. A turntable 506 having a built-in permanent magnet and mounted on the float base 42 comes into contact with and separates from the clamper 505, so that the disc 4 or 5 placed on the upper tray 6 or the lower tray 7 soil, Clamper 5
It can be held between 05 and the turntable 506 and rotated.

Next, the operation of the apparatus of this embodiment will be described with reference to FIG. 33 and FIGS. 2 to 5. The positions of the front end portions 15a and 16a of the sub-trays 15 and 16 are indicated by reference numerals R1 (reproduction or standby state) and R2 (eject state) (FIG. 4).

Further, the circular gear 23, as shown in FIG.
Rotate counterclockwise, initially the disc 4 or 5 of the lower tray 7 is set to the playback position P and is in the playback state (PLAY),
Disc 4 or 5 on upper tray 6 is in the eject position
The case where each member operates sequentially from the state of being located at J (the case of changing from stage (a) to stage (e)) will be described. Reference numeral (f) in FIG. 33 is an operation chart. In addition, lines (D1) and (D2) in FIG. 6 (f) indicate the positional changes of the lower tray 7 and the upper tray 6, respectively.

[Step (a)] In the initial step (a) (FIG. 33), the circular gear 23 is in the clockwise end position, the circular cam 41 is in the counterclockwise end position, and the upper sub-tray 15 is in the end position. Front end 15a is in position R2
The upper tray 6 is located at the eject position J, respectively.

The front end 16a of the lower sub-tray 16 is located at the position R1 and the lower tray 7 is located at the reproduction position P. At this time, the engaging piece 606 of the first clamper arm 601 is
Since it is engaged with the large-diameter groove portion 411b of the one cam groove 411,
The first clamper arm 601 is inclined, so that the clamper holder 501 of the clamper unit 50 is located below.

The first clamper arm 601 is driven by the first
The second clamper arm 602 is also inclined like the first clamper arm 601.

On the other hand, the guide pieces 407, 4 of the float base 42
08 and 409 are located at the position v1 of each V-shaped cam port 405 of the circular cam 41 (Fig. 26), and are held on the lower tray 7 by the turntable 506 and the clamper 505 at this height. The disk 4 or 5 floats above the upper surface of the lower tray 7. This is because the disk 4 or 5 is smoothly rotated by the evening table 506 to be reproduced. Therefore, at this stage (a), the disc 4 or 5 of the lower tray 7 is
Is in the playback state.

"(A) → (b) stage" switch group 14 (Fig.
The motor 31 is continuously rotated by operating 1), and this rotational force is applied to the pulley 302, the belt 304, and the gear pulley 30.
3. Transmission to the circular gear 23 via the idler gear 202 to continuously rotate the circular gear 23 in the counterclockwise direction. At this time,
The tooth portion 208a of the external gear 208 of the circular gear 23 and the follow gear 205
Starts to mesh with each other, and the upper sub-tray 15 is connected via the first pinion gear 21 meshing with the follow gear 205.
Moves to the rear and the front end portion 15a of the upper sub-tray 5 is positioned from the position R2 to R1 (FIG. 4), and then the tooth portion 208a and the follow gear 205 are disengaged.

At this time, the upper tray on the upper sub-tray 15
6 is located at the standby position W. This state is the stage (b)
(Figure 33). [Step (b) → (c)] Further, when the circular gear 23 rotates, the tooth portion 217 of the circular gear 23 and the tooth portion 402 of the circular cam 41 start to mesh with each other, and the circular cam 41 has a predetermined small angle. Only rotate clockwise.

As a result, the cam groove 405 of the circular cam 41 is formed.
The guide pieces 407 to 409 of the float base 42 that are engaged with move downward and move to the position v2 (FIG. 26). As a result, the turntable 506 and the pickup unit 404 mounted on the float base 42 are separated downward from the disc 4 or 5.

On the other hand, the rotation of the circular cam 41 causes the first
An engagement piece 606 provided on the lower portion of the clamper arm 601 and engaged with the cam groove 411 of the circular cam 41 moves relatively from the large diameter groove portion 411b to the small diameter groove portion 411a.

As a result, the first clamper arm 601 swings clockwise (clockwise when viewed from the front), and along with this, the second clamper arm 602 also counterclockwise against the elastic force of the spring 611. The clamper holder 501 is lifted by swinging (counterclockwise when viewed from the right). When the circular gear 23 continues to rotate, the tooth portion 208b of the circular gear 23 moves to the left follow gear 20.
Rotate 5 to move the upper tray through the first pinion gear 21.
Move 6 from the standby position W to the playback position P.

At this time, the tooth portion 208c of the circular gear 23 causes the right follow gear 206 to rotate, and the second pinion gear
The lower tray 7 is moved from the reproduction position P to the standby position W via 22.

The lower sub-tray 16 does not move at this time and its front end 16a remains at the position R1. This state is the stage (c).

[Step (c) → (d)] When the upper tray 6 and the lower tray 7 are positioned at the reproduction position P and the standby position W, respectively, the tooth portions 208b and 208c and the follow gears 205 and 206 are meshed with each other. Comes off. Immediately after this, the teeth 216 of the circular gear 23
Since the circular cam 41 and the tooth portion 401 of the circular cam 41 mesh with each other, the circular cam 41 rotates clockwise by a predetermined angle.
The guide pieces 407 to 409 of the float base 42 engaging with the shaped cam groove 405 move upward and move to the position v3 (FIG. 26). As a result, the pickup unit 404 (FIGS. 4 and 5) attached to the float base 42 and the turntable 506 also move up, and the disc 4 or 5 placed on the upper tray 6 is moved.
Is held between the clamper 505 and the evening table 506 in a state of being floated from the upper tray 6 to shift to the reproduction state.

At this time, the projecting piece 410 attached to the float base 42 is fitted into the positioning hole 105 of the upper tray 6 to keep the upper tray 6 stationary. This state is the stage (d).

"(D) → (e) stage" Further circular gear 23
When is rotated, the tooth portion 208a of the circular gear 23 starts to mesh with the follow gear 206 to move the lower sub-tray 16 forward through the second pinion gear 22.

The lower sub-tray 16 moves with the lower tray 7 still mounted, and its front end 16a moves from the position R1 to the position R2. Therefore, the lower tray 7 also moves from the standby position W to the eject position J. To do. However, the state in which the disc 4 or 5 of the upper tray 6 is in the reproduction state and the lower tray 7 is located at the eject position J is the stage (e), and the discs above and below the stage (a) are higher than those in the initial stage (a). It means that 4 or 5 has been replaced.

In order to shift from the step (e) to the step (a) contrary to the above procedure, a signal for rotating the motor 31 in the reverse direction may be input by operating the switch group 14 (FIG. 1).

In the above embodiment, the case where the trays on which the discs are placed has two upper and lower trays has been shown, but the present invention has a plurality of trays having three or more trays and is capable of continuous performance. Can also be applied to.

[0066]

As described above, according to the present invention, there are provided a disc transporting means for transporting the disc to the reproducing position, including the tray to which the disc is attached and detached, and a disc reproducing means for clamping and reproducing the disc at the reproducing position. A disc player having:
A clamper, a turntable that clamps a disc together with the clamper, a base that supports the turntable, and an elevating means that elevates and lowers the base to move the turntable between a clamp position and a non-clamp position. , The raising and lowering means, around the center
A circular cam member that is rotatable and has an inner space;
A cam for applying a driving force to the circular cam member, the base is arranged in the space including the center, and a protruding member protruding from the base is formed on an inner curved surface of the circular cam member. It is characterized in that it engages with the groove.

That is, as a driving force transmitting member in the mechanism for raising and lowering the turntable, it is arranged around the center thereof.
Since the circular cam member that is rotatable and has an inner space is used and the turntable is arranged in the inner space, the space occupied by the rotation of the circular cam member does not increase, and the turntable is moved up and down. The mechanism can be concentrated in the area occupied by the substantially circular cam member, and the player can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a disc player.

FIG. 2 is an exploded perspective view of a disc player.

FIG. 3 is a plan view of a disc player.

FIG. 4 is a left side view of FIG.

FIG. 5 is a front view of FIG.

FIG. 6 is a plan view of a loading base.

FIG. 7 is a front view of a loading base.

FIG. 8 is a bottom view of the loading base.

FIG. 9 is a one-sided sectional view of the idler gear.

FIG. 10 is a one-sided sectional view of the gear pulley.

FIG. 11 is a (a) plan view of the first pinion gear, (b) one side sectional view, and (c) a bottom view.

12 (a) is a plan view, FIG. 12 (b) is a one-sided cross-sectional view, and FIG. 12 (c) is a bottom view.

13 (a) is a plan view and FIG. 13 (b) is a front sectional view of a follower gear.

FIG. 14 is a plan view of an upper tray.

15 (a) is a sectional view taken along line XII-XII in FIG. 14, (b).
It is a front view.

FIG. 16 is a bottom view of the upper tray.

FIG. 17: Upper sub-tray (same shape for lower sub-tray)
(A) is a plan view and (b) is a sectional view taken along line XIII-XIII.

FIG. 18: Upper sub-tray (same shape as lower sub-tray)
FIG.

FIG. 19 (a) is a plan view of the lower tray, (b) XIV-XIV
It is sectional drawing and (c) front view.

FIG. 20 is a bottom view of the lower tray.

FIG. 21 is a (a) front view and a (b) bottom view of a circular gear.

FIG. 22 is a plan view of a circular cam.

FIG. 23 is a bottom view of the circular cam.

24 is a sectional view taken along line CC of FIG. 22, FIG.
It is a line sectional view and (c) E-E line sectional view.

FIG. 25 is a sectional view taken along line (a) F-F in FIG. 22 and (b) G-G.
It is a line sectional view.

FIG. 26 is an angle development view around the center point 734 of the circular cam.

27 (a) is a plan view, FIG. 27 (b) is a front view, FIG. 27 (c) is a sectional view taken along the line XVII-XVII, and FIG.

28A is a plan view of the first clamper arm, FIG.
It is a front view and (c) side view.

FIG. 29 is a plan view (a) of the second clamper arm, (b).
It is a front view.

FIG. 30 is a right side view (a) of the second clamper arm,
(B) It is the XIX-XIX sectional view taken on the line in FIG.

FIG. 31 is a left side view of a second clamper arm.

FIG. 32 is a plan view (a) and a front sectional view (b) of a clamper holder.

FIG. 33 is an explanatory diagram showing the operation of the device of this embodiment.

[Explanation of symbols]

1 ... Player housing 4, 5 ... Disc 6 ... Upper tray (tray) 7 ... Lower tray (tray) 15 ... Upper sub tray (sub tray) 16… Lower sub tray (sub tray) 20 ... Circular gear 21 ... 1st pinion gear (pinion gear) 22 ... 2nd pinion gear (pinion gear) 23 ... Circular gear 30 ... Drive 40 ... Circular cam mechanism 50 ... Clamper section 60… Clamper lifting mechanism 61 ... Clamper arm 404 ... Pickup section 405 ... Cam groove (cam part) 411 ... Cam groove (cam part) 506 ... Turntable P ... Play position W ... standby position J ... Eject position

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 17/032 G11B 17/04

Claims (3)

(57) [Claims] 1. A tray (6, 7) for loading and unloading a disc
A disc player having disc conveying means for conveying the disc to a reproducing position (P), including: and a disc reproducing means for clamping and reproducing the disc at the reproducing position, wherein the disc reproducing means is a clamper (50). A turntable (506) for clamping the disc together with the clamper, a base (42) for supporting the turntable, and raising and lowering the base to move the turntable between a clamped position and an unclamped position. Lifting means, the lifting means being rotatable about its center (734)
And a circular cam member (41) having an inner space,
A motor (31) for applying a driving force to the circular cam member, the base being disposed in the space including the center,
Projecting members (407, 408, 40) projecting from the base
A disc player characterized in that 9) engages with a cam groove (405) formed in the inner curved surface portion (403) of the circular cam member. 2. A tray (6, 7) for loading and unloading a disc
A disc player having a disc conveying means for conveying the disc to a reproducing position (P) and a disc reproducing means for clamping and reproducing the disc at the reproducing position, wherein the disc reproducing means comprises a clamper supporting member ( 601,
A clamper (50) provided on the base (4)
2) includes a turntable (506) supported by the clamper to clamp the disc together with the clamper, a pickup unit (404) supported by the base, and an elevating means for elevating the clamper and the turntable. Is rotatable about its center (734)
And a circular cam member (41) having an inner space,
A motor (31) for applying a driving force to the circular cam member, the base being arranged in the inner space, the clamper supporting member being arranged above the circular cam member, The disc player is characterized in that a cam groove (405) for applying a driving force to the base and a cam groove (411) for applying a driving force to the clamper supporting member are independently formed. 3. A disc transport means for selectively transporting a plurality of trays (6, 7) to which one disc is attached and detached to different height positions in a reproducing position (P), and a disc in the reproducing position. A disc player having a disc reproducing means for reproducing a disc, the disc reproducing means comprising a clamper (50), a turntable (506) for clamping the disc together with the clamper, and a base (42) for supporting the turntable. ) And an elevating means for elevating the base to move the turntable between a plurality of different height positions and a retracted position, the elevating means being rotatable about its center (734).
And a circular cam member (41) having an inner space,
A motor (31) for applying a driving force to the circular cam member, the base being disposed in the space including the center,
Projecting members (407, 408, 40) projecting from the base
A disc player characterized in that 9) engages with a cam groove (405) formed in the inner curved surface portion (403) of the circular cam member.