JPS58218069A - Reproducer of rotating recording medium - Google Patents

Abstract

PURPOSE:To simplify the consturction of the entire device and to manufacture the device with thin and small size, by constituting the device that a spindle mechanism and a pickup mechanism are elevated to the rotating recording medium reproducing position together with the turning of a base with the insertion of the rotating recording medium and the pickup mechanism reproduces the rotating recording medium from the lower side. CONSTITUTION:The cam mechanism 6 is operated by having only to a disc 3 to a loading slit 2, and the cam mechanism 6 performs automatically the loading operation, the pickup operation and the unloading operation in the range where the cam main body turns one round. Since the disc 3 is clipped with the spindle mechanism 8 and the clamp mechanism 10 and the disc 3 is rotated by being floated from a base 5 while adjusting the rotating center of the disc 3, a motor 26 and a clamper 42 so as to be coincident with in a line, the disc is not contacted with the guide 5a or pins 21a, 21d and signals are accurately picked up and reproduced while keeping the normal relation of position between the pickup part 34 and the disc 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating recording medium reproducing device, and more particularly, a pickup mechanism and a spindle mechanism are moved up and down together while maintaining their relative positions by rotation of a base, and the rotating recording medium is raised and lowered. It is an object of the present invention to provide a rotary recording medium reproducing device which can be put into a reproducing state without causing the rotation of the rotary recording medium, and which can be detached from the rotary recording medium.

In a conventional co-rotating recording medium playback device, a spindle mechanism and a pickup mechanism are fixed on the chassis at the bottom of the playback device, and when a rotating recording medium is inserted into the playback device through the insertion slot, the clamp mechanism operates. The rotary recording medium is lowered to the playback position. Here, since the playback position is located below the insertion slot, (b) when the rotation recording medium is inserted, the rotation recording medium is lowered to the playback position, and conversely, after playback is finished, it is lifted up to the insertion slot position. An elevator mechanism is required. By providing this elevator mechanism, the guide portion that guides the elevator mechanism in the vertical direction is required to have high precision, and the clamp mechanism becomes complicated and expensive. Furthermore, since the rotating recording medium moves up and down and the clamp mechanism and spindle mechanism overlap, there is a drawback that the entire apparatus becomes taller and larger.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

First, an embodiment of a rotating recording medium reproducing apparatus according to the present invention will be described.

In FIG. 1, a rotary recording medium reproducing device 1 has a disk insertion slot 2 on the front side of a box 1a. The disk 3 (rotating recording medium) is inserted horizontally into the reproducing device 1 through the insertion slot. When the disk 3 is inserted above the base 5 shown in FIG. 2, the cam mechanism 6 operates, and the base T rotates upward from the downwardly inclined state to the horizontal state, and the spindle mechanism 8 fixed on the base T is rotated. The pickup mechanism 9 and the pickup mechanism 9 rise together to the position where the disc 3 is played. The disk 3 is held and rotated by a spindle mechanism 8 and a clamp mechanism 10, and is reproduced by a pickup mechanism 8 from the bottom side. After the playback is finished, the base T is lowered 12 with the operation of the cam mechanism 6, and the disc 3 is 27° + #1o1, bmm.
'g erroneous gel, olA*u K:*L is issued.

Next, the configuration of the device 1 will be explained for each mechanism with reference to FIGS. 3 and 4.

■Cam mechanism The cam mechanism 6 has four types of cams as shown in Fig. 4.
~11 (cam body 11 integrated with l, cam body 11
Four types of levers 12a to 12 (L
Then, the motor 3 that drives the cam body 11 and the transmission section 14 that decelerates the rotation of the motor 3 and meshes with the gear portion 11θ of the cam body j1 are connected. The bottles 15a to 15d installed on the levers 12a to 12d are the cams 11 of the cam body 11, respectively.
levers 12a to 12 (1 is a shaft 17a to 17 on the sniffer 6 according to the rotation of the cam body 11)
(Rotates around i. Lever 121) to 12d are kidney 1
The coil springs 181) to 1lid are biased to rotate so that the cams 5b to 15d come into contact with the cams llb to lid. Also, the lever 1211 is flat at the tip. [Support the L-shaped lever 19 that moves the T (gI!
'i'::i'( is pushing the cam 11a. [7 Therefore, in relation to the rotation of the cam body 11, the levers 12a to 12d rotate as described later. The levers 12 & Rotate, push the L-shaped lever 1B, and rotate the base T.

The first movement of the lever 12b turns on the start switch 20 of the motor 13 disposed on the base 16, and starts the motor 13.
is energized. Also, lever 12'F: rF! Stepped portion 23
As will be described later, the step 23 is the bin 21'b.
The lever 21 is locked in the disk ejection prevention position. After lever 12C finishes playing the disc, push the disc 3 in the direction of arrow x7. ′! I encourage you. lever? The stop switch 20a of the motor 13 disposed on the pace 16 is turned OFF by turning 2d, and the motor 1 is turned OFF.
Cut off the power to 3. When the disk 3 is inserted in the direction of the arrow X, the lever 21 rotates clockwise around #I21C on the pace 16 as the bottle 21a at one end is pushed by the disk 3, and the lever 21 rotates clockwise around #I21C on the pace 16 to insert the bottle 21a at the other end. 21 (l enters the expansion □ entrance side of disk 3 and transfers disk 3 to device 1.
Confined inside. The lever 21 is the bottle 21a, which is the lever 12.
1) The coil is urged to rotate by the spring 22 so as to come into contact with K.

■Spindle mechanism Motor 2 that rotates the spindle mechanism 8 (disk 3)
6 is fixed on the base T by a motor base 31. A disk holder 24, a disk centering bush 25, and a coil spring 29 for pressing the bush 25 into the disk center hole 3a are provided on the motor concave rotating shaft 32.
A screw 24a is tightened at the bottom of the holder 24 to fix the holder 24 to the shaft 32. Also, Bush 25
has a guide pin 28 in the center that fits into the guide 2γ of the clamp mechanism 10, and an O-ring 3o for preventing bush removal is fitted in the lower part of the guide pin 28.

■Pickup mechanism The pickup mechanism 9 is roughly divided into a radial feed mechanism 36 provided on the support base 1H and a pickup section 34 provided on the movable base 32.

The rotation of the motor 35 of the radial feed mechanism 31 is transmitted through the transmission section 36.
It is decelerated by the gear group of , and is transmitted to the pinion 36aK,
The rack integrated with the base 32 is driven, and the base 32 moves in the direction of arrow YY. The base 32σ is slidably supported by a shaft 38 supported by left and right support plates 3γ and 31a of the base 1, and moves along the shaft 38. The pickup section 34 is fixed on the base 32, and along with the base 32, the pickup section 34 is arranged along the arrow Y1. Move in the Y direction. The support portion 39 of the base 32 includes a thrust bearing 4.
0 is provided and is fitted with the shaft 38.

Further, between the base γ and the base 32, a transferable VC is provided with a ball 41 that facilitates the movement of the base.

■Clamp mechanism The clamper 42 of the clamp mechanism 10 is the spindle mechanism 8
The disc 3 is opposed to the holder 24 and comes into contact with the upper surface of the disc 3, and cooperates with the holder 24 to clamp the disc 3. Clamper 4
2 is fixed to the top plate 1b ^ 1''”3 (D 7= ) ”/ ′<43' i
'q,, Th"""i"1'"8 and is supported in a suspended state. Inside the -5° Poldai 3, a clamper 42 is attached to a ball 44 holding a rotatable VC1ll1211tE and a coil spring 45. Was forced to hit the ball 44? A thrust bush 46 is provided. Also clamper 421
A guide 2T into which the guide bin 28 of the spindle mechanism 8 fits into the donut-shaped convex portion 42a that comes into contact with the i-disk 3
has.

In addition, the spindle mechanism 8 and the pickup mechanism 9 are connected to the base 7.
Support plates 31 are disposed on the left and right sides of the base 7.
is fixed. A support plate 37 is provided on the bottom plate 1C of the box body 1a so as to sandwich the base T, and a base support plate 47 is provided on the outside of the base plate 37a. A shaft 48 is horizontally suspended between the base support plates 47, and the left and right support plates 37, 37& are rotatably supported by the shaft 48. Therefore, the base T moves around the shaft 48 (b), and when not playing, the base T is tilted downward as shown in FIG.
is in a declining state. , as shown in FIG. Rotate around l. Lever 1. . yl<, P*Liu Ni,. e, > 51 ii Eka 32. .

The base 7 is fitted into a provided hole 50, and the base 7 moves up and down simultaneously with the rotation of the lever 19.

Further, the base 5 provided above the spindle mechanism 8 and the pickup section 34 has a disk guide section 5a that guides the disk 3 inserted from the insertion slot 2 to a playback position. Furthermore, the base 5 has a hole 5 for raising the holder 24.
b, a hole 5C through which the pickup section 34 moves in the directions of arrows Y and Y2 to play the disc 3, and a hole 5d through which the lever 12C rotates to push out the disc 3 in the direction of the arrow x2 after the playback is completed. , holes 5θ and 5f are provided for the movement of the bottles 21a and 21(l).

Next, the operation of the rotary recording medium reproducing apparatus 1 according to the present invention will be explained with reference to FIGS. 4 to 8.

The outfit before inserting the disc! Each mechanism in Section 1 is shown in Figure 2 and Section 3.
There is a state ylζ shown in the figure, cams lla to lld and bin is
The 1d relationship of digits a to 15d is in the state shown in FIG. To play disc 3, first insert disc 3 onto base 5 from insertion slot 2 in the direction of arrow X1, and then press switch 1.
d to instruct the microcomputer (not shown) to change the playback position of the disc 3. The disk 3 is pushed in until the outer peripheral edge 3b comes into contact with the arc-shaped guide portion 5a1 at the back while pressing the bin 21a as the disk is inserted. At this time, as shown in FIG.
1a rotates in the direction of arrow A1, and the bin 21d
enters the rear side of the disk 3 in the direction -F, thereby preventing the disk 3 from being erroneously ejected in the direction of arrow X2. Further, the bottle 211) is latched by the stepped portion 23 of the lever 12b, and the lever 21 is biased in the direction of arrow A2 by the spring 22, but maintains the state shown in FIG. 6.

When the latch is operated, the lever 121) is rotated in the direction of arrow B by the spring 18bVC, and the motor switch 2Q'iON is turned on. This drives the motor 3, and this driving force causes the cam body 11 to rotate in the direction of arrow 0 via the transmission portion 14.

Below, the rotation angles of 06 and 1 when the cam body 11 is in the state shown in FIG. 4 before the disk is inserted are shown. The operation of each mechanism will be explained in conjunction with the cam mechanism 6 according to the rotation angle of the cam body 11 with reference to the cam diagram in FIG.

In addition, graph lines 1, u, Ill,
IV is a cam diagram 1 of cams lla to 11d of the cam body 11, respectively.

(1) The process in which the cam body 11 rotates from 0@ to 90@;
The pin 15d fits into the recess of the cam 11d and the lever 12d
rotates in the direction of arrow E1, and the motor stop switch 20
Set a to 0FIP. As a result, the motor 3 stops, and the cam main body 11 rotates 90 degrees in the direction of arrow C and stops. During disc playback, the cam body 11 is maintained at this stop position.

The lever 12a moves in the direction of the arrow, and the L-shaped lever 1
9 is rotated in the direction of arrow F1, and the base 1 is rotated upward. The base 1 rotates at a relatively low speed around the shaft 48 to be in a horizontal state, and the spindle mechanism 8 and the pickup mechanism 9 are raised in the direction of the arrow 2. Both mechanisms 8 and 9 move while maintaining their relative positional relationship. The holder 24Fi of the spindle mechanism 8 comes into contact with the bottom side of the disk 3 and 111 (the disk 3 is placed 751Jl, 61.1 mm).
5o00, the taper part of rush 25 is deWlj''jl
It fits into the pointed center hole 3a to adjust the rotational center position of the -C disk 3, and supports the disk 3 by the elastic force of the spring 2B.

Finally, the disk 3 is lifted up from the base 5 in an aligned state and is held between the clamper 42 and the holder 24. Further, the guide pin 28 is fitted into the guide 27, and the rotation center positions of the motor 26 and the disk 3 are adjusted to coincide with each other. Furthermore, the N part 4zb of the clamper 42 is connected to the holder 4.
The single-point support of the cislast bush 46 and the ball 44, which are rotatable away from the stopper 43a of No. 3, coincides with the center of rotation of the disk 3. At the same time, the motor 26 rotates, and the disk 3 is rotated counterclockwise at a constant speed, making it ready for pickup. Beep.

The clamping mechanism 9 reaches a height position where the clamped disc 3 can be reproduced.

Next, the pickup section 34 is driven by the radial feed mechanism 31 to open the hole 5aKa on the base 5 with the arrow 'Y4. As the signal moves in the Y2 direction, the lens section 52 reproduces the signal at the designated position on the disk 3 by changing it to the lower side of the disk 3.

After the reproduction is completed, the power to the motor 26 is cut off and the rotation of the disk 3 is stopped according to instructions from a microcomputer (not shown). At the same time, energization of the motor 13 is started, and the cam main body 11 further rotates in the direction of arrow 0.

(2) During the process in which the cam body 11 rotates from 90° to 180°, the pin 15d escapes from the recess of the cam IId, and the switch 20a is turned ON again. Also, pin 15a
By the rotation of the cam 11a, the lever 121L supporting the lever 19 is moved in the direction of the arrow D2 (B). Therefore, since the center of gravity of the base 7 is on the left side of the shaft 4, it rotates at a relatively low speed in the direction of the arrow z2, and the lever 1g
is rotated in the direction of arrow F2, and the base T returns to its original state as shown in FIG. At this time, the pickup section 34 and the spindle mechanism 8 descend together with the base 1 in the direction of the arrow z2. As the spindle mechanism 8 descends, the disk 3 separates from the clamp mechanism 10 and is placed on the base 5, and the spindle mechanism 8 separates from the lower surface side of the disk 3 and the center hole 3a and descends to the lower side of the base 5. .

(3) During the process in which the cam body 11 rotates from 180° to 220°, the lever 121) rotates in the direction of arrow B, the pin 21a is released from the stepped portion 23, and the switch 20 returns to the OFF state. The lever 21 rotates in the direction of arrow A2 under the action of the spring 22, and the pin 21a comes into contact with the tisf outer peripheral edge 3b, and the pin 21
d is separated from the disk 3, and the disk becomes ready to be returned.

(4) In the process of the cam body 11 rotating from 220@ to 300", the state of (3) above is maintained by the lever 121) if the cam 11). The lever 120 is moved by the cam 110 in the direction of arrow G.

the protrusion 5 of the lever 120 at a relatively low speed.
3 pushes out the disk 3 in the direction of the arrows x and h through the hole 5dKG. Therefore, as shown in FIG. 1, the disk 3 protrudes beyond the insertion slot 2 and can be pulled out from the device 1.

As shown in FIG. 8, the lever 21 is arranged so that the disc 3
It moves in two directions and rotates in the arrow A2 direction l\, and then
21&, 21d are holes 5e.

Move along 5f.

(5) During the process in which the cam body 11 rotates from 3000 to 360@, the lever 12b is biased in the force direction of arrow B along with the rotation of the cam llb by the action of the spring 18b, and rotates to come into close contact with the pin 211L. , the lever 121) is in the locked state as shown in FIG. The lever 120 places the disk 3 thereon, rotates in the direction of arrow G2, and returns to its original position. When the cam body 11 is rotated to the 360@ position, the lever 12d moves in the direction of arrow E.
, and turn the switch 20a to the OFF state. The cam itself? ? #: If it stops at the rotated position. Therefore, each mechanism is in the state shown in FIG. 2 before the disk is inserted, and is pulled out from the three-disk storage device 1.

In this way, the cam mechanism 6 is operated simply by pushing the disk 3 into the insertion slot 2, and the cam mechanism 6 automatically performs the loading operation, pickup operation, and unloading operation within the range of one revolution of the cam body 11. Easy to operate.

□ Also, since the pin 21 (L is located on the insertion slot side of the disc 3) at the same time as the disc 3 is inserted, it prevents the disc 3 from being pulled out accidentally during playback.
is held between the spindle mechanism 8 and the clamp mechanism 10,
In order to rotate the disk 3 while floating from the base 5 while adjusting the rotation center positions of the disk 3, the motor 26, and the clamper 42 so that they are aligned in a straight line, the guide portion 5
a or the pins 21a and 216, the pickup section 34 and the disk 3 always maintain a proper positional relationship, and can accurately pick up and reproduce signals. The support portion 39 of the base 32 of the radial feed mechanism 36 is rotatably supported on the shaft 38 via a thrust bearing 40, and a ball 41 is provided between the base 32 and the base T, so that the arrow Y1. It enables light and smooth movement in the Y2 direction. In addition, since the device 1 is a front-loading system in which the disk 3 is installed and removed from the front, and the switches for operation are also located at the front, there is no need for a dust cover. The device is thin and easy to put in and take out, and the design is
.

·the law of nature It is also sophisticated and authentic.

As described above, in the rotating recording medium n main device according to the present invention, the pickup mechanism that detects a signal from the rotating recording medium and the spindle mechanism that rotates the rotating recording medium are tilted downward before the rotating recording medium is inserted. The spindle mechanism and pickup mechanism are fixed on a single base that rotates so that when a rotating recording medium is inserted into the playback position, it rises and becomes horizontal. As the rotating recording medium rotates, it rises to the N-rotation recording medium reproducing position, the rotating recording medium is supported by the spindle mechanism from the lower surface side and rotates, and the pickup mechanism reproduces the rotating recording medium from the lower surface side. Since there is no need for a mechanism to support the inserted rotating recording medium and move it vertically to the playback position lower than the height of the insertion slot, the entire device can be made thinner and smaller with a simple structure. , can be manufactured at low cost, and each fl! I! Since it is possible to promote assembly of the mechanism, it is not only lagging behind in productivity, but also because it is possible to maintain a high precision relative positional relationship between the rotating recording medium clamped to the spindle mechanism and the pickup mechanism. It has the following features: it can fully satisfy the precision required for the recording medium, and it is also easy to operate because it can be played by simply inserting the rotating recording medium into the playback device.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a state in which a rotating recording medium is installed and removed in an embodiment of a rotating recording medium reproducing apparatus according to the present invention, and FIG. 2 is a plan view showing a state of the internal mechanism of the reproducing apparatus before inserting the rotating recording medium. , Fig. 3 is a cross-sectional view showing the spindle mechanism and clamp mechanism as seen from the direction of the line ■-■ in Fig. 2, and Fig. 4 shows the cam body and each pin abutting each cam before inserting the rotating recording medium. Figure 5 is a diagram showing the positional relationship of the levers, and Figure 5 is a cam diagram of each cam within the range of one rotation of the cam body shown in Figure 4.
Figure 1 shows the operating state of each lever when a rotating recording medium is inserted into the playback device. The cross-sectional view m1 shown in FIG. 8 is a diagram showing a state in which the rotary recording medium is pushed back to the outside after the reproduction is completed. 1... Rotating recording medium playback device, 2... Insertion slot, 3...
Disc (rotating recording medium), 5,7.16.32...
Base, 5a, 5a1...Disc guide, 5b~5
f...hole, 6...cam mechanism, 8...spindle mechanism, 9...pickup mechanism, 10...clamp mechanism, 1
1--Cam body, 11L ~ 1ld--Cam, 12
a to 12d. 21...Lever, 13, 26.35...Motor, 1
5a-15d, 21a, 51...bin, 11a-11d
. 21C...Shaft, 18b-18 (1, 22...Coil spring, 19...L-shaped lever, 20...Start switch, 20a...Stop switch, 21d...Disk extrusion prevention bin, 23... Stepped portion, 24... Disc holder, 25... Disc centering bush, 27... Guide, 28... Guide bin, 31... Radial feed υ mechanism,
34...Bitter up part, 37, 37a...Support plate,
38.48... Shirt l-140... Thrust ring, 42... Clamper, 43-... Holder 1. ．． 5
2. Lens Department 14. Patent Applicant 1 Lee Kume Co., Ltd. - 4th
Diagram 5

Claims (1)

[Claims] (b) The pickup mechanism that detects the signal from the rotating recording medium and the spindle mechanism that rotates the rotating recording medium are tilted downward before inserting the rotating recording medium, and (9) the rotating recording medium is reproduced. The spindle mechanism and the pickup mechanism rotate together with the rotation of the base when the rotating recording medium is inserted. The rotating recording medium is raised to a recording medium playback position, the rotating recording medium is supported by the spindle mechanism from the lower surface side and rotates, and the pickup mechanism is configured to reproduce the rotating recording medium from the lower surface side. Media playback device.