JPH0422440Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a disc player that uses a disc on which music, etc. is recorded using digital signals, is mounted on a turntable, and a laser pick-up is used to read and play back the disc recorded on the disc. Relating to a mounting device.

``Conventional technology'' Conventionally, a tray with a diameter of 8 cm was used to place a large disk with a diameter of 12 cm on the turntable.
There is a technology to move a small-diameter disk into and out of a turntable. As shown in Japanese Utility Model Application Publication No. 55-144613, this technology uses a donut-shaped adapter to expand the outer diameter of a small-diameter disk to the outer diameter of a large-diameter disk, and places the small-diameter disk on the surface of the tray on which the large-diameter disk is placed. The method of mounting it as a large-diameter disk and the actual development in 1986.
- As shown in Publication No. 111543, the outer diameter of the large-diameter disk mounting surface of the tray is reduced to the outer diameter of a small-diameter disk using an adapter, and the small-diameter disk is mounted using the large-diameter disk mounting surface of the tray as the small-diameter disk mounting surface. There was a problem with the method.

"Problems to be Solved by the Invention" In the prior art, the former method does not require the adapter to be fixed in position on the large-diameter disk mounting surface of the tray, but the latter method does not require the adapter to be fixed in position on the large-diameter disk mounting surface of the tray. If the small diameter disk is not fixed in position, it will be inserted onto the turntable in a misaligned position.

Therefore, the adapter used in the latter method is fixed in position on the large-diameter disk mounting surface of the tray, but as shown in Japanese Utility Model Application Publication No. 111543/1983, a protrusion is provided on the large-diameter disk mounting surface of the tray. However, with the method of fitting this protrusion into the positioning hole of the adapter, the large-diameter disk is point-supported on the large-diameter disk mounting surface of the tray, which is extremely unstable. There was a risk of injury.

``Means for Solving the Problems'' However, the present invention provides a structure in which a small diameter disk is attached to a large diameter disk mounting surface of a tray via an adapter body, and an outer diameter that is approximately the same as the diameter of the large diameter disk mounting surface is provided. A protrusion is formed to protrude from the outer peripheral edge of the adapter body having a diameter in a direction perpendicular to the direction in which the tray comes in and out, and the protrusion is locked to the tray in the direction in which it comes in and out, so that the adapter body is placed on the large diameter disk mounting surface. It is in a fixed position.

"Function" Therefore, according to the present invention, the adapter body is fixed in position further outside the large-diameter disk mounting surface of the tray via the protrusion on the adapter main body side, so that the large-diameter disk mounting surface of the tray is free of protrusions. It can be formed into a flat surface, and a large-diameter disk can be mounted extremely stably, and there is no risk of damaging the large-diameter disk.Also, since the protrusion is locked to the tray in this direction, the tray can be easily mounted. The protrusion is made to act most effectively against misalignment of the adapter body due to movement, and the adapter body can be properly positioned.
Moreover, by allowing a slight displacement of the adapter body in the direction perpendicular to the direction in which the tray comes in and out, the adapter body can be easily attached to and removed from the large-diameter disk mounting surface of the tray.

"Embodiments" Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a plan view of a small-diameter disk mounted on a tray, and FIG. 2 is an overall plan view. A turntable motor 3 is fixedly installed on the lower side of the center of a chassis 2 installed inside a disk player cabinet 1. The output shaft 4 of the motor 3 is made to protrude to the upper surface side of the chassis 2, and a turntable 5 is provided at the upper end, and a pedestal 7 to which a laser pickup 6 is attached is provided on the chassis 2 via a columnar rail 8 and a guide 9. One end of the rack gear 10 in the upward position is fixed to the pedestal 7 with a screw 11, while a pick-up moving motor 12 is fixed to the lower surface of the chassis 2, and screws 13, 13 are screwed onto the motor 12 from the upper surface of the chassis 2. The output shaft 14 of the motor 12 is made to protrude toward the upper surface of the chassis 2, and the worm gear 15 is fitted onto the output shaft 14 from above. Further, bearings 16 and 1 are provided on the upper surface side of the chassis 2.
6, a reduction gear 17 is provided, one end of the gear 17 shaft is rotatably fixed with a locking pawl 19, and the other end is rotatably fixed with a screw 18, and the large diameter side of the gear 17 is connected to the worm gear 15, and The small diameter sides are engaged with rack gears 10, respectively, and the pickup 6 is configured to slide back and forth by forward and reverse rotation of the motor 12.

Furthermore, a tray 21 is provided on which a large-diameter disk 20 with a diameter of 12 cm is placed and placed onto and taken out from the turntable 5, and a disk holder 22 is attached to the tray 21 to lift and support the large-diameter disk 20 against the large-diameter disk mounting surface 21a of the tray 21. At the same time, a pair of shafts 2 of the holder 22 are attached to a pair of bearings 23 and 23 and locking claws 24 and 24 provided on the lower surface side of the tray 21.
A spring 26 is provided between the tray 21 and the base end of the holder 22, and a spring 26 is provided between the tray 21 and the base end of the holder 22 to support the disk holder 22 rotatably and to support the tip of the holder 22 so as to protrude toward the top surface of the disk holder 22. Axis 25, 2
The shafts 25, 25 are rotatably fitted into a pair of bearings 23, 23 of the tray 21, which are provided symmetrically with a spring 26 interposed between the tray 21 and the holder 22. A pair of locking claws 24, 2 are integrally formed symmetrically with the tray 21.
4 to keep the respective shafts 25, 25 locked.

Further, a chuck plate 27 is provided between the upper surface of the turntable 5 and the large diameter disk 20, and the chuck plate 27 is rotatably attached to the tip of the chuck arm 28, and the chuck plate 27 is attached to the tip of the chuck arm 28 by a leaf spring 29.
7 downward, and the chuck arm 28
The base end shafts 30, 30 are connected to the bearings 31 on the chassis 2,
31 via a locking pawl 32 and a screw 33 so as to be rotatable up and down.

A tray loading/unloading gear 35 that meshes with a rack gear 34 on one side of the tray 21 is pivotally supported on the upper surface of the chassis 2, and a tray loading/unloading motor provided on the bottom side of the chassis 2 via a belt 36, pulleys 37, 38, and gears 39, 40. 41 is connected to the inlet/output gear 35, and the tray 21 is slidably attached to the upper surface of the chassis 2 via a guide 42.
1, the tray 21 is moved in and out by forward and reverse rotation, and the elevating pin 43 protruding from the lower surface of the base end of the chuck arm 28 is engaged with the grooved cam 44 on the upper surface of the tray in/out gear 35. The chuck arm 28 is moved downwardly by the cam 44 at the rotating portion 35a, while at other times the chuck arm 28 is supported upwardly during the entry and exit of the tray 21.

Further, a holder opening/closing lever 4 is attached to the upper surface of the chassis 2 through screws 45, 46 and a long hole 47 so as to be able to swing freely.
A swing pin 49 protruding from the lower surface of the chuck arm 28 is engaged with one end of the lever 48, and a descending guide arm 50 is provided at the other end of the lever 48.
When the tray 21 enters, the lever 48 is swung by the downward movement of the chuck arm 28, the guide arm 50 is engaged with the locking shaft 51 of the disk holder 22, and the arm 50 comes into contact with the lever 48. The lever 48 is swung in conjunction with the disk clamping operation of the chuck arm 28, and the disk holder 22 is retracted and separated from the large diameter disk 20 by the storage operation of the tray 21. The large diameter disk 20 is supported by the turntable 5 and the chuck plate 27.

Furthermore, a locking pin 52 as a locking member is erected and fixed on the upper surface of the chassis 2, and an upward truncated conical opening 53 is opened at the tip side of the disk holder 22, so that the disk holder 22 can be moved in and out by the storage operation of the tray 21. When the tray 21 is lowered, a lock pin 52 engages in the opening 53 of the holder 22 to prevent the tray 21 from moving in and out (back and forth) direction.

Next, as shown in FIGS. 1, 9, and 10, the large-diameter disk mounting surface 21a of the tray 21 is
The adapter main body 55 is provided with an outer circumferential surface 54 that is circular in plan view and has an outer diameter L that is approximately the same as the diameter D of the adapter main body 55. is 8cm
The insertion opening 57 having an inner diameter l that is approximately the same size as the diameter d of the small diameter disk 56 is inserted into the adapter body 55.
By attaching the adapter body 55 to the tray 21, the small-diameter disk 56 is guided by the insertion opening 57 onto the large-diameter disk mounting surface 2.
1a.

Further, the depth H of the large-diameter disk mounting surface 21a and the height h of the adapter body 55 are formed to be approximately equal, and protrusions 59 that come into contact with the left and right side opening edges 58, 58 of the large-diameter disk mounting surface 21a are formed. It is formed on the outer circumferential surface 54 of the adapter body 55, and the adapter body 55 is detachably attached to the tray 21 so as to fill the large diameter disk mounting surface 21a.

The present embodiment is constructed as described above, and the tray 21 is moved out of the cabinet 1 by the control of the tray loading/unloading motor 41, and the large diameter disk 20 is placed on the large diameter disk mounting surface 21a of the tray 21, or the large diameter disk mounting surface 21a of the tray 21 is By fitting the adapter body 55 into the adapter body 21a, the small diameter disk 56 is mounted on the large diameter disk mounting surface 21a through the insertion opening 57.

and the large diameter disc 20 or the small diameter disc 56
is lifted and supported by the disk holder 22, the tray 21 is advanced onto the chassis 2 by reversing the motor 41, and the tray 21 is housed in the set position, so that the tray loading/unloading gear 35 rotates freely, and the grooved cam 44 Push the lifting pin 43 to lower the chuck arm 28 and lower the chuck plate 27.
A disk 20 or 56 is sandwiched between the turntable 5 and the lower turntable 5. In conjunction with the lowering of the chuck arm 28, the opening/closing lever 48 is swung by the swing pin 49, and the guide arm 50 of the lever 48 is brought into contact with the shaft 51 of the disk holder 22, and the arm 5
0, the disk holder 22 is lowered via the shaft 51, and this holder 22 is attached to the disk 20 or 5.
6 to complete the mounting of the disk 20 or 56. By lowering the disk holder 22, the holder 2 is attached to the lock pin 52 on the upper surface of the chassis 2.
The opening 53 of No. 2 engages to prevent the tray 21 from moving in the in/out direction.

Then, the turntable motor 3 is driven to rotate the turntable 5, and each gear 10,
The pedestal 7 is reciprocated by forward and reverse rotation of the pick-up motor 12 via the pick-up motor 15 and 17, and the pick-up 6 is linearly moved in the radial direction with respect to the turntable 5 that supports the disk 20 or 56. It reads and reproduces the recorded symbols.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a structure in which the small diameter disk 56 is attached to the large diameter disk mounting surface 21a of the tray 21 via the adapter body 55. A protrusion 59 is formed to protrude from the outer peripheral edge of the adapter body 55 having an outer diameter substantially the same as the diameter in a direction perpendicular to the direction in which the tray 21 enters and exits, and the protrusion 59 is locked to the tray 21 in this direction. The adapter body 55 is fixed in position on the large-diameter disk mounting surface 21a of the tray 21, and the adapter body 55 is moved further outside the large-diameter disk mounting surface 21a of the tray 21 through the protrusions 59 on the side of the adapter main body 55. Since the position is fixed by using the tray 21, the large-diameter disk mounting surface 21a of the tray 21 can be formed into a flat surface without protrusions, and the large-diameter disk 20 can be mounted extremely stably.
The risk of damaging the large diameter disk 20 can be eliminated, and the projections 59 can be removed from the tray 21.
Tray 2 is locked in this direction of entry and exit.
The position of the adapter body 55 can be properly fixed by making the protrusions 59 act most effectively against the displacement of the adapter body 55 due to one movement. By allowing a slight positional shift, significant effects such as the ability to easily attach and detach the adapter body 55 to and from the large-diameter disk mounting surface 21a of the tray 21 can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of essential parts showing one embodiment of the present invention, Fig. 2 is an overall plan view, Fig. 3 is a bottom view of the same, Fig. 4 is a plan view of the tray, and Fig. 5 is a bottom view of the same. , 6th
The figure is an explanatory diagram of the chuck arm installation, Fig. 7 is an explanatory diagram of the holder opening/closing lever installation, Fig. 8 is an explanatory diagram of the disk holder installation, Fig. 9 is an explanatory diagram showing the adapter main body support structure, and Fig. 10 is a back view of the adapter main body. It is. 20...Large diameter disk, 21...Tray, 21
a...Large-diameter disk mounting surface, 55...Adapter body, 56...Small-diameter disk, 57...Insertion port.

Claims (1)

[Scope of utility model registration request] In a structure in which a small diameter disk 56 is attached to the large diameter disk mounting surface 21a of the tray 21 via the adapter body 55, the large diameter disk mounting surface 21a
A protrusion 59 is formed to protrude from the outer peripheral edge of the adapter main body 55 in a direction perpendicular to the direction in which the tray 21 enters and exits, and has an outer diameter that is substantially the same as the diameter of the adapter body 55 .
is locked to the tray 21 in this direction, and the adapter body 55 is placed on the large-diameter disk mounting surface 21a.
A disk mounting device for a disk player, characterized in that the position is fixed at the top.