JPH0454309B2 - - 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 which improves the operability of the disk device. Regarding equipment.

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 disc is fixed firmly and is 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 these problems in mind. That is, it is an object of the present invention to provide a disk playback device with good operability, which can easily perform a series of operations for loading and unloading a disk. Furthermore, this series of operations can be achieved smoothly and reliably,
However, the aim is to simplify the configuration of the device.

In order to achieve this object, the disc playback device of the present invention includes a turntable fixed to the main body of the device to rotate the disc, a mounting position for mounting the disc, and a performance position for positioning the mounted disc above the turntable. a disk carrier supported by the device main body so as to be horizontally movable between the
The disk is supported by the main body of the device so as to be able to swing vertically toward or away from the turntable, and when the conveyor moves to the performance position, the disk is clamped to the turntable in relation to the movement of the conveyor. a clamping body, a disk holding part which is supported by the transporting body so as to be able to rise and fall and which holds the disk by placing the lower surface of the disk at the mounting position and regulating the outer circumference of the disk; a biasing means for elastically biasing upward; a driving means disposed on the apparatus main body for driving the clamping body when the transport body completes movement to the performance position; and a driving means disposed on the apparatus main body for driving the clamping body When the disc is clamped onto the turntable, there is a push-down means that uses the driving force of the drive means to push down the disc holding part against the biasing means, and a push-down means that pushes down the disc holding part against the urging means when the disc is clamped to the turntable, and a push-down means that pushes down the disc holding part against the urging means when the disc is attached to the turntable. It is characterized by comprising a stopping means for stopping at the position.

According to the present invention, the disc mounted on the disc holding portion of the disc carrier at the disc mounting position is automatically mounted on the turntable. That is, the disk transport body is moved horizontally to the performance position, and then stopped at a predetermined position by the action of the stopping means. In response to this, the disk holder is lowered by the drive means. At the same time, the disk holder is lowered by the pressing means against the elastic force of the urging means. The disk is lowered as the disk holder is lowered, and thereby the disk is placed on the turntable. Thereafter, the disk holding portion is pressed down by a predetermined stroke, thereby separating it from the disk. At this time, since the disk holder is lowered at the same time, the disk placed on the turntable as described above is immediately pressed onto the turntable by the disk holder.

In the manner described above, the disc is attached to the turntable. Removal of the disc from the turntable is accomplished by a reverse operation to that described above.

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

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.
Reference numerals 16 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 upper surface of the carrier 13 and both the holding arms 16 and 17, and is biased upward. Both side arched portions of the disk 2 are held. Here, the compression spring 18 is
This corresponds to the biasing means in the present invention. 19 is a rack gear formed in the front-rear direction on the right side of the carrier 13; 20 is a rotating shaft disposed on the right side of the mounting chamber 6 and protrudes upward; a pinion gear 21 that meshes with the rack gear 19 is rotatably mounted thereon; is a drive motor,
Driven by the motor 20, the carrier 13 is moved back and forth via the pinion gear 21 and rack gear 19. Reference numerals 22 and 23 denote 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. The drive motor 20, pinion gear 21, rack gear 19, etc. 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 26;
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 at the center of the lower end into which the rotating shaft 9 of the rotating disk 8 is inserted. Several electromagnetic magnets 31 of variable polarity are embedded in the outer periphery of the lower surface of the cap 2, and the magnets 31 are attracted or repelled by the magnet 10 of the rotating disk 8. Here, the fixed arm 26 and the fixed cap 29
corresponds to the clamping body in the present invention. 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. Then, the fixed arm 26 and the fixed cap 2
9 constitutes a disk holder. 34 is a plunger disposed at the center of the rearmost part of the mounting chamber 6, and its rod 35 projects forward;
The tip of the rod 35 is introduced into the cavity 32 and connected to the operating shaft 33, and when the plunger 34 is energized, the rod 35 is sucked rearward, and the fixed arm 26 and other parts are moved through the operating shaft 33. The side is pulled rearward, and the fixed arm 26 resists the bias of the tension spring 28, and the fixed cap 29 is rotated in the downward direction of the arrow as shown in FIG. here,
Plunger 34 corresponds to driving means in the present invention. 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, respectively; 38 and 39 are located to the left and right of the plunger 34, and are connected to the rotation shaft 40, respectively;
and 41 are rotatably supported side surfaces are L-shaped shift levers, and pressing portions 42 and 43 are formed at the front end of one side of each lever, and the conveyor 1
Disk holding arm 1 which is the disk holding part of No. 3
The holding arms 16 and 17 come into contact with the upper surfaces of the rear ends of the holding arms 16 and 17 and function to push the holding arms 16 and 17 downward.
Here, the shift levers 38 and 39 correspond to pressing means in the present invention. Also, the shift lever 38
A long hole is formed at the lower end of the other side of each of the pins 36 and 39, and pins 36 and 37 are respectively inserted into the long holes, and both shift levers 38 and 39 are rotated in conjunction with the fixed arm 26. Moving shaft 40, 4
Rotated around 1. Reference numerals 44 and 45 denote 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 has been moved to a position where it can engage with the rotating shaft 9. A transmission type optical switch is constructed to detect the presence of 2. The light emitter 44 and the photoreceptor 4
5 detects the disk 2, the drive motor 20
is stopped and the plunger 34 is driven. Reference numerals 48 and 48 denote cylindrical stoppers hanging from the rear upper wall, which contact the ends of the disk carrier 13 when the disk carrier 13 moves to the performance position, and keep the fixed arm carrier 13 at all times. It acts to accurately position the player at the playing position. Here, the light emitter 44, the light receiver 45, and the stoppers 48, 48
constitutes the stopping means in the present invention. 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. The fixing arm 26, the fixing cap 29, the magnets 10, 31, the plunger 34, etc. constitute a fixing mechanism for fixing the disk 2 to the rotating shaft 9.

Next, the operation of the embodiment will be explained.
When the disk device is used, when the disk 2 is inserted into the device 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 1, as shown in FIGS. 3 and 4. and the holding part 16,
17, thereby holding the disk 2. At the same time, the disk 2 reaches the disk device 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 FIGS.
is located above the rotation axis 9, then the light emitting body 4
4 to the photoreceptor 45 is blocked by the disk 2, and the signal from this transmission type optical switch causes
The driving of the drive motor 20 is stopped, the transport body 13 is stopped, and the disk 2 is stopped at a position where it can be engaged with the rotating shaft 9. At this time, both shift levers 38, 3
The respective pressing portions 42 and 43 of the holding arms 16 and 17 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 rearward 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 2 is biased to rotate by
9 is lifted upward and held, and the fixed arm 26 and 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
Both holding arms 16, 17 are held by the pressure of 2, 43.
The disk is held by 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 is rotated upward and hits the stopper 46, and the fixed cap 29 is moved upward by 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. Also, when the disk 2 is removed after the playback is finished, the ejection switch 47 can be operated.
The reverse operation described above can be performed automatically, and the disk 2 can be easily removed manually, resulting in excellent usability and operability.

Since the disc playback device of the present invention is constructed as described above, when the disc is mounted on the disc transport body during the disc drive, the disc is moved to the disc playing position by the transport body and fixed to the rotating shaft of the turntable. This makes it possible to improve the operability of the disk device and to securely fix the disk. It should be noted that the disk reproducing apparatus of the present invention will become even more useful when considering the combination of television and audio equipment as disk sizes become smaller in the future.

Further, since the conveyor is provided with a stopping means for stopping the conveyor at the performance position when the conveyor is moved toward the performance position, the conveyor can be smoothly moved.

[Brief explanation of the drawing]

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. 1... Device body, 2... Disk, 4... Insertion hole, 9
...Rotating shaft, 11, 12... Guide rail, 13... Disk transport body, 16, 17... Disc holding part, 1
9... Rack gear, 20... Drive motor, 21... Pinion gear, 22, 23... Detection means consisting of a light emitting body and a light receiving body, 26, 29... Disc clamping body consisting of a fixed arm and a fixed cap, 44, 45... Light emission body and photoreceptor.

Claims (1)

[Scope of Claims] 1. A turntable 8 fixed to the main body of the device to rotationally drive the disk 2, and between a mounting position where the disc is mounted and a performance position where the mounted disc is positioned above the turntable. a disk transport body 13 supported by the apparatus main body so as to be horizontally movable; clamping bodies 26 and 29 that clamp the disk to the turntable in relation to the movement of the conveyor when the conveyor moves; and clamping bodies 26 and 29 that are movably raised and lowered by the conveyor and that place the lower surface of the disk at the mounting position. Disk holding parts 16 and 17 that hold the disk by regulating the outer circumferential portion of the disk; and urging means 18 that elastically urges the disk holding part upwardly with respect to the disk transport body; a driving means 34 for driving the clamping body upon completion of the movement of the conveying body to the performance position; Means 3
pressing means 38, 39 for pushing down the disk holding section against the urging means using the driving force of 4;
and stopping means 44, 45 for stopping the conveying body at the performance position when the conveying body moves toward the performance position.
A disc playback device comprising: 48;