JPH0444822B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a disk playback device that uses a light beam, a needle, etc. to play back information recorded on a video or audio disk, and that improves the operability of the disk device. Regarding.

In conventional disc playback devices, when installing a disc, the center hole of the disc is inserted into the rotating shaft at the center of the rotating disk provided in the main body of the device, and then a cap for holding the disc is attached with a screw, etc. The disk is fixed and rotatable. Further, when the disk is removed, the disk is removed in the reverse manner as described above. Since this disk needs to be rotated at high speed, a means for securely fixing it to the rotating shaft is required as described above.

However, the conventional playback apparatus described above has the disadvantage that the series of operations for loading and unloading the disc is complicated and the operability is poor.

This invention has been made with the above points in mind, and will now be described in detail with reference to drawings showing one embodiment thereof.

In the drawings, reference numeral 1 denotes a box-shaped main body of a disk playback device, and 2 a video, audio, etc. disk, and a center hole 3 is formed in the center of the disk 2. As shown in FIG. Reference numeral 4 denotes an insertion hole for the disk 2 formed horizontally on the front surface of the device body 1 by the mouthpiece 5, and a mounting chamber 6 for the disk 2 formed inside the device body 1 communicates with the outside via the insertion hole 4. has been done. Reference numeral 7 denotes a regeneration motor for rotating the disk, which is located below the center of the mounting chamber 6 and whose shaft penetrates the lower wall of the mounting chamber 6 and is introduced into the mounting chamber 6.
A rotating disk (turntable) 8 is integrally provided at the shaft end of the rotating disk 8, and a rotating shaft 9 into which the center hole 3 of the disk 2 is inserted into the center of the rotating disk 8 is provided to protrude upward. Several magnets 10 are embedded in the upper surface of the outer periphery of the magnet 8.

Reference numerals 11 and 12 indicate bar-shaped guide rails provided in the front and back direction on the left and right sides of the mounting chamber 6, respectively. Reference numeral 13 indicates a disk transport body in which a disk holding portion and an upper surface holding plate (to be described later) are provided facing each other. It is provided between the guide rails 11 and 12 and is slidable along both the guide rails 11 and 12. Further, downward guide pins 14 and 15 are integrally fixed to both rear sides of the disk carrier 13, respectively. 1
Reference numerals 6 and 17 designate disk holding portions consisting of approximately arc-shaped disk holding arms located below both sides of the conveyor 13 and supported by guide pins 14 and 15 so as to be movable up and down, respectively, and the lower ends of both guide pins 14 and 15. A compression spring 18 is interposed between the holding arms 16 and 17, and is biased upward.
Both side arched portions of the disk 2 inserted through the insertion hole 4 are held between the upper surface holding plate 3 and both holding arms 16, 17. Reference numeral 19 denotes a rack gear formed in the front-rear direction on the right side of the carrier 13, and 20 a pinion gear 21, which is disposed on the right side member of the mounting chamber 6 and meshes with the rack gear 19 on a rotating shaft protruding upward.
is a drive motor that is shaft-mounted, and the pinion gear 21 and the rack gear 1 are driven by the motor 20.
The conveyor 13 moves back and forth via 9. Reference numerals 22 and 23 indicate a light emitting body such as an LED and a light receiving body such as a photodiode, which are mounted on the upper and lower inner surfaces of the mounting chamber 6 in the center thereof, and these constitute a transmission type optical switch. 2 is detected, and the drive motor 20 is started to be driven. Note that the drive motor 20 and pinion gear 2
1. The rack gear 19 and the like constitute a drive mechanism for moving the disc 2 to a predetermined performance position.

24 is a pair of support pieces 2 on the rear upper wall of the mounting chamber 6
a left-right rotation shaft supported between 5 and 25;
is a fixed arm that is rotatably supported on a rotation shaft 24 and has a substantially L-shape in side view, and the fixed arm 26
One side protrudes very long forward, and the tension spring 28 between the other side of the fixed arm 26 and the hook 27 at the bottom of the mounting chamber 6 allows the fixed arm 26 to rotate upward on that side. energized. 29
is a fixed cap for fixing the disk 2, which is rotatably provided at the front end of one side of the fixed arm 26, and has a recess 30 formed in the center of the lower end into which the rotating shaft 9 of the front-rear rotary disk 8 is inserted. Several electromagnetic magnets 31 of variable polarity are embedded in the outer periphery of the lower surface of the cap 29, and the magnets 31 are attracted or repelled by the magnet 10 of the rotating disk 8.
Reference numeral 32 denotes an operation cavity formed on the other side of the fixed arm 26, and an operation shaft 33 in the left and right direction is integrally provided. The fixed arm 26 and fixed cap 29 constitute a disk clamping body. Reference numeral 34 denotes a plunger disposed at the center of the rearmost part of the mounting chamber 6, and its rod 35 protrudes forward, and the tip of the rod 35 is inserted into the cavity 3.
2 and is connected to the operating shaft 33, and by energizing the plunger 34, the rod 3
5 is sucked rearward, the other side of the fixed arm 26 is pulled rearward via the operating shaft 33, and the fixed arm 26 resists the biasing force of the tension spring 28, causing the fixed cap 29 to move as shown in FIG. Rotated in the downward direction of the arrow. 36 and 37 are horizontal pins that are integrally provided at the other end of the fixed arm 26 and extend outward to the left and right, and 38 and 39 are plungers 34.
L-shaped shift levers are located on the left and right sides of the shift lever, and are rotatably supported by rotation shafts 40 and 41, respectively. Pressing portions 42 and 43 are formed at the front end of each side. The rear end portions of the disk holding arms 16 and 17, which are the disk holding portions of the transport body 13, are brought into contact with the upper surfaces of the rear end portions of the disk holding arms 16 and 17 to push the holding arms 16 and 17 downward. Further, a long hole is formed at the lower end of the other side of each of the shift levers 38 and 39, and a pin 36, 3 is formed in each of the long holes.
7 are respectively inserted, and both shift levers 38 and 39 are moved in conjunction with the fixed arm 26, respectively.
It is rotated around rotation shafts 40 and 41. 44
and 45 are a light emitter and a light receiver mounted on the upper and lower inner surfaces of the rear part of the mounting chamber 6, and the disc 2 has been moved to a predetermined performance position, that is, the disc 2 has been moved to a position where it can be engaged with the rotating shaft 9. A transmission type optical switch is constructed to detect the presence of. The luminous body 4
The plunger 34 is driven by the detection of the disk 2 by the photodetector 4 and the photoreceptor 45. 46 is a stopper of the fixed arm 26, and 47 is an eject switch for removing the disk provided on the front side of the main body 1 of the apparatus. Note that the fixed arm 26, fixed cap 29, magnets 10, 31, plunger 34
A fixing mechanism for fixing the disk 2 to the rotating shaft 9 is constructed by the above.

Next, the operation of the embodiment will be explained.
When the disk device is used, when the disk 2 is inserted into the mounting position in the device main body 1 through the insertion hole 4, the peripheral edge of the disk 2 is attached to the upper surface holding plate of the disk carrier 13, as shown in FIGS. 3 and 4. and holding part 1
6 and 17, thereby holding the disk 2. At the same time, the disk 2 reaches the disk attachment position of this carrier 13, so that light from the light emitting section 22 to the light receiving section 23 is blocked. The presence of disk 2 is detected. Upon detection of the disk 2, the drive motor 20 starts driving, and the disk 2 is held on the disk holding portion of the disk transport body 13 via the pinion gear 21 and the rack gear 19, and both guide rails 11, Move backward along 12.

Next, the movement of the conveyor 13 progresses, and as shown in FIG. 5 and FIG. When the light emitter 44 is located at
3 stops, and the disk 2 stops at a position where it can engage with the rotating shaft 9. At this time, both shift levers 38,
The pressing portions 42 and 43 of the shift levers 38 and 39 are located on the upper surfaces of the rear ends of the holding arms 16 and 17, respectively, and are in a standby state for rotational operation of the shift levers 38 and 39. On the other hand, while the carrier 13 is moving backward from the disk mounting position, the fixed cap 29 located above is supported by the tip of one side of the fixed arm 26. Since the fixed cap 29 is biased to rotate, the fixed cap 29 is lifted upward and held, and the fixed arm 26 and the fixed cap 29 do not interfere with the movement of the carrier 13.

Furthermore, as described above, the light emitter 44 and the photoreceptor 4
When the disk 2 is stopped at a position where it can engage with the rotating shaft 9 as detected by the transmission type optical switch 5,
At the same time, the signal from the transmission type optical switch starts energizing the plunger 34, and its suction action causes the rod 35 to move rearward, and the fixed arm 26 moves downward via the operating shaft 33 as shown by the arrow in FIG. Rotate to. As the fixed arm 26 rotates, the fixed cap 29 on one side of the fixed arm 26 moves downward, and both pins 36 and 37 on the other side of the fixed arm 26 move backward, as shown in FIGS. 7 and 8. The shift levers 38 and 39 rotate around the rotation shafts 40 and 41, respectively, and the pressing portions 4
2 and 43, the holding portion of the disk consisting of both holding arms 16 and 17 is moved to both guide pins 14 and 15.
move downwards along the As the fixed arm 26 rotates, the fixed cap 29 is placed on the upper surface of the disk 2, and both the holding arms 16, 1
7, the disk 2 moves downward, and the rotating shaft 9 of the rotating disk 8 is inserted into the center hole 3 of the disk 2.
The concave portion 30 of the fixed cap 29 is fitted into the disk 2, and further, due to the mutual attraction between the magnet 10 of the rotating disk 8 and the electromagnetic magnet 31 of the fixed cap 29, the disk 2 is moved between the rotating disk 8 and the fixed cap 29.
The disk 2 is fixed to the rotating shaft 9. Here, both the holding arms 16 and 17 are pushed down by both the shift levers 38 and 39 to a position where they do not interfere with the rotation of the disk 2, and the disk 2 becomes rotatable by the rotating shaft 9, and the rotating disk 8
Since the fixed cap 29, which is integral with the disk 2, is rotatably supported by the fixed arm 26, it does not interfere with the rotation of the disk 2. Then, in this state, reproduction (performance) of the disc 2 is started.

Next, when removing the disk 2 after the playback is finished, etc., by operating the ejection switch 47 on the front of the device main body 1, the power to the plunger 34 is cut off and the suction of the rod 35 is stopped.
If the polarity of the electromagnet 31 of the fixed cap 29 is reversed, the rod 35 of the plunger 34 will be ejected forward, and the fixed arm 26 will be released from the tension spring 28.
Due to the biasing force, the fixed cap side rotates upward and hits the stopper 46, and the fixed cap 29 moves upward due to the rotation of the fixed arm 26, and is interlocked with the rotation of the fixed arm 26. Since both shift levers 38 and 39 rotate, the pressing force on both holding arms 16 and 17 is removed, and both holding arms 16 and 17 are respectively floated by the compression springs 18, and the disk 2 is moved to the upper surface of the carrier 13. The disk reaches the lower surface of the holding plate and is held between the holding plate and a disk holding portion made up of both holding arms 16 and 17. Furthermore, after this, the drive motor 20 is driven and rotates in the opposite direction to that at the time of insertion, and the carrier 13 moves forward via the pinion gear 21 and the rack gear 19, and the carrier 13 moves the disk that should be on standby at all times. When the attachment/detachment position (attachment position), that is, the position shown in FIGS. 3 and 4, is reached, the driving motor 20 stops, and the conveying body 13 stops. Thereafter, the disk guided forward from the insertion hole 4 is manually removed.

Therefore, according to the embodiment, the disk 2
At the time of mounting, by inserting the disk 2 through the insertion hole 4 of the device main body 1, the disk 2 is held in the disk holding portion of the transport body 13 at the disk mounting position, and the disk 2 is held by the drive motor 20. The disk 2 is driven to a performance position where it can engage with the rotating shaft 9, and is then fixed to the rotating shaft 9 by a disk clamping body consisting of a fixed arm 26, a fixed cap 29, etc., so that it can be played in rotation. In addition, this series of operations can be automatically controlled by detecting the disk 2 using both transmissive optical switches, and the user only needs to insert the disk 2 through the insertion hole 4 and perform the operation. This makes it possible to achieve extremely good performance, and also to securely fix the disk 2 to the rotating shaft 9. Furthermore, when the disk 2 is removed, such as after the end of playback, the reverse operation described above can be performed automatically by simply operating the ejection switch 47, and the disk 2 can also be easily removed manually. , it can be made with excellent usability and operability.

As described above, the disc playback device of the present invention includes a turntable that rotationally drives a disc, and a disc holder that holds the disc by placing the lower surface of the disc and regulating the outer periphery of the disc. a disk carrier supported movably between a disk mounting position where a disk is placed on the disk holding portion and a performance position where the disk held by the disk holding portion is rotationally driven by the turntable; and a clamping body that clamps the disc held by the disc holding section to the turntable when the disc is in the performance position. can be moved to the disc playing position by means of a carrier and fixed to the rotary shaft of the turntable, making it possible to achieve extremely good operability in mounting the disc, and also to securely fix the disc. As disk sizes become smaller in the future, the disk playback device of the present invention will become even more useful when combined use with televisions, audio equipment, etc. is considered.

Furthermore, since it is equipped with a clamping body movement control means that sequentially controls the movement of the clamping bodies in relation to the movement of the carrier, the operability is improved, and the rack provided on a part of the carrier Since it is equipped with gears that mesh with each other, it is possible to perform disk mounting and playback operations with a simple configuration.

[Brief explanation of drawings]

Each of the drawings shows one of the disc playback devices of the present invention.
Embodiment 1 is an overall perspective view, FIG. 2 is a partial front view, FIG. 3 is a plan view seen from the side, and FIG.
5 to 8 show operating states, FIGS. 5 and 7 are plan views seen from the side, and FIGS. 6 and 8 are cut side views. DESCRIPTION OF SYMBOLS 1... Apparatus body, 2... Disk, 4... Insertion hole, 9... Rotating shaft, 11, 12... Guide rail, 13... Disk transport body, 16, 17... Disk holding part, 19... Rack gear, 20... Drive motor, 21... Pinion gear, 22, 23...
...Detection means consisting of a light emitter and a photoreceptor, 26, 29
. . . A disk clamping body consisting of a fixed arm and a fixed cap, 44, 45 . . . A light emitting body and a light receiving body.

Claims (1)

[Claims] 1 Turntable 8 that rotationally drives the disk 2
, a disk holding part 16 that holds the disk by placing the lower surface of the disk and regulating the outer peripheral part of the disk, and a disk which supports the disk holding part so that it can be lowered and on which the disk is placed. a disk transport body 13 supported so as to be horizontally movable between a mounting position and a performance position in which a disc held by the disc holder is located above the turntable; and when the transport body is in the performance position. , a clamping body 26 for clamping the disc held by the disc holding section to the turntable;
a driving means 34 for driving the clamping body upon completion of the movement of the transporting body to the performance position; and a driving force of the driving means 34 when the disc is clamped to the turntable by the clamping body. a push-down means 38 that presses down the disc holder, and a clamping body movement control unit 4 that sequentially controls the movement of the clamping body in response to the movement of the conveying body to the performance position.
4, 45.