JPH0454307B2 - - 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 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 has a turntable fixed to the main body of the device to rotate the disc, a disc mounting position where the disc is mounted, and a playing position where the disc is positioned above the turntable. A disk carrier is supported by the device main body so as to be horizontally movable, and a disk carrier is supported by the device main body so as to be able to swing vertically toward or away from the turntable, and when the disk carrier moves to the performance position. , a clamping body that clamps the disk between the turntables in relation to the movement of the movable body, and a clamping body that is supported by the carrier so that it can be raised and lowered, and that places the lower surface of the disk at the device position and restricts the outer circumference of the disk to hold the disk. A disc holding part for holding the disc, a biasing means for elastically biasing the disc holding part upwardly with respect to the disc transport body, and a biasing means disposed in the main body of the apparatus to hold the disc holding part, and a clamping member disposed in the main body of the apparatus to hold the disc when the transport body is moved to the performance position. When the disk is clamped to the turntable by the driving means and the clamping body disposed in the main body of the device,
It is characterized by comprising a push-down means for pushing down the disk holding part against the urging means using the driving force of the drive means.

According to the present invention, the disk mounted on the disk holding portion of the disk carrier at the disk device position is automatically mounted on the turntable. That is, the disk transport body is moved horizontally to the playing position, and the disk clamping body is lowered by the drive means accordingly. At the same time, the disk holder is lowered by the push-down 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 clamping body is being lowered at the same time, the disk placed on the turntable as described above is immediately pressed onto the turntable by the disk clamping body.

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 rod-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 section and an upper surface holder (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. Furthermore, guide pins 14 and 15 are integrally fixed downwardly on both sides of the rear portion of the disk carrier 13, respectively. 1
Reference numerals 6 and 17 designate disk holding parts that are located below both sides of the conveyor 13 and are comprised of substantially arc-shaped disk holding arms that are vertically movably supported by guide pins 14 and 15, 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. An exploded perspective view of the holding arm 17 and its support means is shown in FIG. Note that the holding arm 16 is formed in a shape that is laterally symmetrical to the holding arm 17, and the supporting means is the same as that shown in FIG. 9. 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; This is a drive motor, and the pinion gear 21 and the rack gear 19 are driven by the motor 20.
The conveyor 13 moves back and forth via. Reference numerals 22 and 23 denote a light emitting body such as an LED and a light receiving body such as a feed diode, 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, and a disk inserted through the insertion hole 4 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 at the center of the lower end into which the rotating shaft 9 of the rotating disk 8 is fitted; 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. 3
Reference numeral 2 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 introduced into the cavity 32 and connected to the operating shaft 33. When the plunger 34 is energized, the rod 35 is sucked rearward, and the fixed arm 2 is moved through the operating shaft 33.
6 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. 3
6 and 37 are integrally provided at the tip 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 rotation shafts 40 and 41, respectively; The side surface of the shift lever is rotatably supported by the L-shape, and the front end of each side has a pressing part 4.
2 and 43 are formed, and disk holding arms 16 and 1 which are disk holding parts of the transport body 13 are formed.
The holding arms 16 and 17 are pressed down by coming into contact with the upper surface of the rear end of the holding arms 16 and 17. Further, a long hole is formed at the lower end of the other side of each of the shift levers 38 and 39, and pins 36 and 37 are respectively inserted into the respective long holes, and both shift levers 38 and 39 are connected to the fixed arm 26. are rotated about rotation axes 40 and 41, respectively. 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 plunger 34 is driven by the detection of the disk 2 by the light emitter 44 and the light receiver 45. 46 is fixed arm 2
A stopper 6 and 47 are eject switches for removing the disk, which are provided on the front side of the main body 1 of the apparatus. Note that the fixed arm 26 and the fixed cap 2
9, magnets 10, 31, 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 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 is moved to both guide rails 11 and 12. Move backwards along the line.

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 3
The pressing portions 42 and 43 of 8 and 39 are respectively located on the upper surfaces of the rear ends of both the holding arms 16 and 17,
The shift levers 38 and 39 are in a standby state for rotational operation. 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. The fixed cap 29 is lifted upward and held, and the fixed arm 26 and the fixed cap 29 are rotated by the carrier 13.
does not impede movement.

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 plunger 34 starts to be energized by a signal from the transmission type optical switch.
Due to the suction action, the rod 35 moves backward,
The fixed arm 26 is rotated downward as shown by the arrow in FIG. 6 via the operating shaft 33. 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 carrier 13 at the disk device position, and the disk 2 is held in the disk holding portion of 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. Moreover, this series of operations can be automatically controlled by detecting the disk 2 by both transmission type optical switches, and the user only has to insert the disk 2 through the insertion hole 4. This makes it possible to achieve extremely good operability, 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, according to the present invention, it is possible to easily attach and detach the disk from the turntable, and it is possible to improve the operability of the apparatus.

In addition, the disc holder is elastically biased against the disc carrier to be supported in a descendable manner, and the disc holder is pushed down using the driving force of the disc clamping member at the disc performance position.
The operation of placing the disk on the turntable and the operation of clamping the disk by the disk clamping body can be synchronized with good timing.

Here, the mechanism that drives and controls the disk holder is
The structure of this mechanism is extremely simple since it only includes a biasing means for elastically biasing the disk holder against the disk transport body and a pushing means for pushing down the disc holder against the bias. Become.

Further, since the driving force of the driving means is used for both pushing down the disk holder and driving the disk clamping body, one driving source can be omitted, and the cost of the apparatus can be reduced.

[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.
The figure is a cutaway side view, Figures 5 to 8 show operating states, Figures 5 and 7 are plan views seen from the side, Figures 6 and 8 are cutaway side views, and Figure 9 is a side view. FIG. 2 is an exploded perspective view of a disk holder and its support means. 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... Disk clamping body consisting of a fixed arm and a fixed cap, 44, 45... Light emission body and photoreceptor.

Claims (1)

[Claims] 1. A turntable 8 fixed to the main body of the device for rotationally driving the disk 2, and a horizontal line between the disk device position where the disk is mounted and the performance device which positions the disk above the turntable. A disk transport body 13 is movably supported by the apparatus main body, and a disc transport body 13 is supported by the apparatus main body so as to be swingable in the vertical direction so as to move toward or away from the turntable, and the transport body moves to the performance position. clamping bodies 26 and 29 that clamp the disk to the turntable in relation to the movement of the carrier; and clamping bodies 26 and 29 that are supported by the carrier so as to be movable up and down and that place the lower surface of the disk in the mounting position and that hold the disc on the turntable. Disk holding parts 16 and 17 that hold the disk by regulating the outer circumferential part; urging means 18 that elastically urges the disk holding part upward with respect to the disk transport body; disposed in the main body of the apparatus; a driving means 34 for driving the clamping body upon completion of the movement of the conveying body to the performance position; and a driving means 34 disposed in the apparatus main body, when the disc is clamped on the turntable by the clamping body.
4. A disc playback device comprising: a push-down means 38 for pushing down the disc holding portion against the urging means using the driving force of the disc playback device.