JPH0917111A - Disk table - Google Patents

Abstract

PURPOSE: To take out the driving force for a spindle motor for the purposes other than the rotating operation of a recording disk by providing a gear part at the outer surface part of a disk table, which is attached to a spindle shaft and holds and rotates the recording disk. CONSTITUTION: A gear part 16 is provided at the outer surface part of a disk table, which is attached to a spindle shaft 2 and holds and rotates a recording disk 201. Here, in a driving-force transfer mechanism, a first gear 23, which is engaged with the gear part 16 of a table member 10, is provided on a chassis 18. A second transfer gear 24, whose diameter is smaller than the gear 23, is coaxially attached to the gear 23 as a unitary body. A third transfer gear 25, which is rotatably supported on the chassis 18, is engaged with the gear 24. A fourth gear 26, whose diameter is smaller than the gear 25, is coaxially attached to the gear 25. A fifth gear 27, which is rotatably supported on the chassis 18, is engaged with the gear 26. The driving force of the disk table like this can be taken out for the other purposes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk table for positioning and holding a recording disk in a disk player device or the like, and being rotated by a driving means such as a motor.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a disc player device configured to record or reproduce an information signal by using a recording disc such as an optical disc or a magneto-optical disc as a recording medium.

In such a disc player device, the recording disc is positioned and held with reference to a circular positioning hole (chucking hole) provided in the central portion. That is, the disc player device has a positioning protrusion that is fitted into the positioning hole, and has a disc table that is rotated by a spindle motor. The disk table positions and holds the recording disk by fitting the positioning protrusions into the positioning holes of the recording disk, and is rotated by the spindle motor to rotate the recording disk.

In the disc player device, an optical pickup device writes or reads information signals on the recording disc held on the disc table and rotated.

And, in the above-mentioned disc player device,
An eject mechanism is provided for prohibiting an eject operation for removing the recording disc from the disc table while writing or reading an information signal to or from the recording disc.

As shown in FIG. 10, this eject mechanism has a first eject slider 117 and a second eject slider 118. The eject sliders 117 and 118 are slidably attached along the outer surface of the outer casing of the disc player device.

The first eject slider 117 is provided with an eject knob 116 which is manually slid. This eject knob 116
As a result, when the first eject slider 117 is slid in one direction, as indicated by the arrow c in FIG. 10, the first eject slider 117 is moved through the eject intermediary lever 111 at the arrow d in FIG. As shown
The second eject slider 118 is slid.

That is, the first eject slider 117 pushes the eject mediating piece 115 of the eject mediating lever 111 to move the eject mediating lever 111, and the eject mediating piece 115 serves as the second ejecting medium. Then, the eject slider 118 is pressed and moved. The first eject slider 117 is
The second eject slider 118 cannot be slid to the position where it is directly pressed, and the second eject slider 118 cannot be slid unless the eject mediating piece 115 is interposed.

The second eject slider 118 is
When the slide operation is performed, an operation such as opening the lid of the outer casing of the disc player device is performed, and an eject operation for removing the recording disc from the disc table is performed.

The eject mediating lever 111 is movably arranged on the eject prohibiting lever 106 arranged in the outer casing of the disc player device, and the eject mediating piece 115 is arranged outside the outer casing. So as to project toward the first side and the first and second eject sliders 117, 11
It is entering between 8.

The eject mediating lever 111 has support holes 110 and 110, and these support holes 110 and 110 are provided.
The support shafts 109, 109 that are planted on the eject prohibiting lever 106 are inserted into the eject prohibiting lever 106, so that the eject prohibiting lever 106 is disposed on the eject prohibiting lever 106. The eject intermediary lever 111 has a spring hooking portion 113, and a tension coil spring 114 stretched between the spring hooking portion 113 and the spring hooking portion 112 of the eject prohibiting lever 106 in FIG. As indicated by an arrow b, the eject mediating piece 115 is connected to each of the eject sliders 11.
It is positioned so as to be urged in the direction of entering between 7, 118.

The eject prohibiting lever 106 has support slits 108, 108.
08, 108 support shafts 107 provided in the outer casing,
By inserting 107, the eject mediating piece 115 is slidably supported in the direction of advancing and retracting between the eject sliders 117 and 118, as indicated by an arrow a in FIG.

The eject prohibiting slider 10 is also provided.
6 is slid by an eject prohibiting motor 101 arranged in the outer casing. That is, the drive gear 10 is attached to the drive shaft of the eject prohibiting motor 101.
2 attached. A transmission gear 120 meshes with the drive gear 102. In this transmission gear 120,
The worm gear 103 is coaxially and integrally attached. The worm gear 103 is used for the worm wheel 10
It meshes with 4. In this worm wheel 104,
The driven gear 119 is coaxially and integrally attached. The driven gear 119 is used for the eject prohibiting lever 106.
It meshes with the rack gear 105 formed on the.

In this disc player device, the eject prohibiting motor 101 moves the eject prohibiting lever 106 to the eject mediating piece 115 while the information signal is being written to or read from the recording disc. Is slid to a position where it is withdrawn from between the eject sliders 117 and 118. At this time, even if the first eject slider 117 is slid, the second eject slider 118 cannot be slid, and the eject operation cannot be executed.

In this disc player device, when the information signal is not written to or read from the recording disc, the eject prohibiting motor 101 is operated by the eject prohibiting lever 106.
Is slid to a position where the eject mediating piece 115 enters between the eject sliders 117 and 118. At this time, when the first eject slider 117 is slid, the second eject slider 118 is slid to execute the eject operation.

[0016]

In the disk player device as described above, in addition to the spindle motor, the eject prohibiting motor, and further the optical pickup device and the magnetic head device for moving operation. A motor is needed.

Therefore, in the above-mentioned disc player device, the number of motors required for the configuration is increased, and the device configuration is complicated and large in size.

If the driving force of one motor can be used for a plurality of purposes, the number of motors required for the construction of the device can be reduced. In the above-mentioned disc player device, however, the driving force of each motor can be reduced. Are used for their respective dedicated applications, and the number of motors cannot be reduced.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and makes it possible to use the driving force of a spindle motor for other applications of the rotating operation of a recording disk, and to provide a disk player. An object of the present invention is to provide a disk table that can reduce the number of motors required for the configuration of the device.

[0020]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a disk table according to the present invention has a positioning protrusion that fits into a circular positioning hole provided in the center of a recording disk. And a disk mounting portion projecting in a flange shape on the peripheral side of the positioning projection portion and on which the peripheral portion of the positioning hole of the recording disk is mounted, and a disk mounting portion formed coaxially with the positioning projection portion. And a gear portion, which is attached to a rotary shaft along the central axis of the disc positioning protrusion to be rotationally operated.

[0021]

The disk table according to the present invention is provided with a positioning projection which fits into a circular positioning hole provided in the central portion of the recording disk, and a flange-like projection provided around the positioning projection. A disk mounting portion on which a peripheral portion of the positioning hole is mounted, and a gear portion formed coaxially with the positioning protrusion, and a rotary shaft along a central axis of the disc positioning protrusion. Since it is attached and rotated, not only the recording disk placed on the disk placing section and positioned by the positioning protrusions is rotated, but also the disk table is rotated via the gear section. The driving force for driving can be transmitted to the outside.

[0022]

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

This example is an example in which the disc table according to the present invention is applied to a disc player device for recording and reproducing information signals using a disc cartridge.

The disc cartridge used in this disc player device is constructed by rotatably housing a recording disc for recording information signals such as a so-called optical disc or magneto-optical disc in a thin casing cartridge.

A magneto-optical disk, which is a recording disk used as a recording medium (medium) for information signals in this disk player device, has a disk substrate made of a transparent synthetic resin material such as polycarbonate having a diameter of, for example, about 64 mm, and a magnetic material. A signal recording layer composed of is deposited and formed.

This signal recording layer is locally heated to a temperature higher than the so-called Curie temperature by means of irradiation of a focused laser beam or the like, and an external magnetic field is applied to this heated portion, whereby the information signal Written. The information signal thus written irradiates the signal recording layer with a linearly polarized light beam such as a laser beam, and detects the rotation of the reflected light beam of this light beam in the signal recording layer due to the so-called Kerr effect. Thereby, it can be read.

An optical disc, which is a recording disc used as a recording medium for information signals in this disc player device, has a reflective layer made of a metal material such as aluminum on a disc substrate similar to the disc substrate of the magneto-optical disc. It is formed by deposition. On the disc substrate of this optical disc, fine pit rows corresponding to the information signals are formed by means such as injection molding.

The information signal written on the optical disk irradiates the pit train with a coherent light beam such as a laser beam, and changes the light amount of the reflected light beam of the light beam due to diffusion or interference in the signal recording layer. It can be read by detecting.

As shown in FIGS. 6 to 9, the magneto-optical disk and the optical disk are used as the cartridge 20.
5, 216 are rotatably housed to form a disk cartridge.

The cartridge 205, which constitutes the recording / reproducing disk cartridge 220 by accommodating the magneto-optical disk, has a thin casing having a rectangular main surface portion whose one side substantially corresponds to the diameter of the magneto-optical disk. It is constructed like a body. As shown in FIG. 6, the cartridge 205 has a magnetic head opening 223 for exposing a part of the signal recording surface of the magneto-optical disk to the outside on the main surface on the upper surface side. In addition, this cartridge 205
As shown in FIG. 7, an optical pickup opening 222 is provided at a position facing the magnetic head opening 223 on the main surface portion on the lower surface side, and a chuck is provided at a substantially central portion of the main surface portion on the lower surface side. It has a king opening 213. The recording / reproducing disc cartridge 220 is inserted and mounted in the front direction in the disc player device as shown by an arrow M in FIGS. 6 and 7.

The above-mentioned recording / reproducing disc cartridge 2
In the cartridge 205 of No. 20, the magnetic head opening 223 and the optical pickup opening 222.
Can be opened and closed by the shutter member 206. The shutter member 206 has these openings 223,
A shutter plate part corresponding to 222 and facing each other in parallel, and a connecting part connecting one end sides of these shutter plate parts to each other are made of a synthetic resin material or a metal material.
It is configured integrally. This shutter member 206 is
The connecting portion is slidably supported by a supporting groove portion 207 formed on one side of the cartridge 205. That is, the shutter member 206 slides rearward along one side of the cartridge 205 to open the openings 223 and 222, and slides forward from the rear side to return to the initial position. Then, the shutter plates close the openings 223, 222.

The cartridge 216, which constitutes the read-only disc cartridge 221, in which the above-mentioned optical disc is housed, has a thin casing shape having a rectangular main surface portion whose one side substantially corresponds to the diameter of the optical disc. It is configured. As shown in FIG. 8, this cartridge 216 does not have an opening in the main surface portion on the upper surface side. As shown in FIG. 9, the cartridge 216 has an optical pickup opening 222 on the main surface on the lower surface side, and the chucking opening 2 on the substantially central portion of the main surface on the lower surface side.
13. The reproduction-only disc cartridge 221 is inserted and mounted in the front direction in the disc player device as shown by an arrow M in FIGS. 8 and 9.

The reproduction-only disc cartridge 221.
In the cartridge 216, the optical pickup opening 222 can be opened and closed by a shutter member 217. The shutter member 217 has a shutter plate portion corresponding to the optical pickup opening 222 and a support portion provided on one end side of the shutter plate portion, and is integrally made of a synthetic resin material or a metal material. Is configured. The shutter member 217 has the support portion slidably supported by a support groove portion 207 formed in one side portion of the cartridge 216. That is,
The shutter member 217 slides backward along one side of the cartridge 216 to open the optical pickup opening 222, and slides forward from the rear side to return to the initial position. The shutter plate portion closes the optical pickup opening 222.

Each of the shutter members 206 and 217 has a
A shutter closing hole 208 is provided at a substantially central position of the connecting portion or the supporting portion, facing the side. The shutter closing hole 208 is for engagement with a member for closing the shutter members 206 and 217 in the disc player device.

A circular positioning hole (chucking hole) 20 is formed at the center of the magneto-optical disk and the optical disk.
4 have been established. The positioning hole 204 is closed by the chucking plate 202 from the upper surface side. The chucking plate 202 is formed of a magnetic metal material such as iron or stainless steel into a disk shape having a diameter substantially corresponding to the positioning hole 204. The positioning hole 204 and the chucking plate 202 are inserted through the chucking opening 213.
The cartridges 205 and 216 are exposed to the outside.

The cartridges 205 and 21 are
A pair of front side and rear side positioning holes 209 and 210 are formed in the lower main surface portion of 6. The front side positioning hole 209 has the optical pickup opening 222.
Is located in the vicinity of the edge of the main surface portion on the front side, and is formed in an oval shape with the major axis direction being the front-rear direction. Also,
The rear-side positioning hole 210 is located in the vicinity of the edge of the rear-side main surface portion of the optical pickup opening 222, and is formed in a circular shape.

Further, the cartridges 205 and 216 described above
A plurality of identification holes 224 are formed in the vicinity of the edge on the other side of the lower main surface portion on the rear side. These identification holes 224
Is for identifying the type and state of the disks housed in these cartridges 205 and 216, for example, whether or not information signals can be recorded. In the cartridge 205 of the recording / playback disk cartridge 220, a save notch 214 is provided in the rear side surface portion corresponding to the identification hole 224. This save notch 21
4 is moved and operated to identify the identification hole 224.
One of the two is moved back and forth, the depth of the identification hole 224 is changed, and the identification state of whether or not the information signal can be recorded is switched. Further, the engaged concave portion 212 is formed at the edge portion on the other side of the lower main surface portion front side of each of the cartridges 205 and 216.
Are formed.

The recording / reproducing disc cartridge 2
In the No. 20 cartridge 205, a magneto-optical disc identifying recess 211 is formed at the front side edge of the lower main surface. In addition, the reproduction-only disc cartridge 22
In the cartridge 216 of No. 1, the optical disk disc identification concave portion 218 is formed at the front side edge portion of the lower main surface portion. The magneto-optical disc identifying concave portion 211 and the optical disc identifying concave portion 218 have different depths from the lower main surface portion. Due to the difference in depth, whether the accommodated disc is the magneto-optical disc or the optical disc. It is designed to be able to identify.

Then, as shown in FIG. 2, the disc player device includes the disc cartridges 220,
The chassis 18 has a size substantially corresponding to the size of 221.

The disk cartridges 220 and 221 are positioned and mounted on the chassis 18. That is, the chassis 18 has a pair of front and rear locating pins on the upper surface thereof, and by fitting the locating pins in correspondence with the locating holes 209 and 210, the disc cartridges 220 and 221 can be fitted.
Position.

Each of the disk cartridges 220, 22 described above
1 is mounted on the chassis 18 by
This is performed by inserting the disc cartridges 220 and 221 into a cartridge holder (not shown) which is disposed above and above the chassis 18 so as to be able to come into contact with and separate from the chassis 18.
That is, with respect to the cartridge holder separated from the chassis 18, the disc cartridge 22
0, 221 is inserted in the front direction to hold the disk cartridges 220, 221 in the cartridge holder, and the cartridge holder is set in the chassis 18
The disk cartridge 22
0 and 221 are mounted on the chassis 18.

The disk cartridge 220,
When the cartridge 221 is inserted into the cartridge holder, the shutter members 206 and 217 are opened.

The disc player device has an openable / closable lid portion above the cartridge holder. When the lid is closed, the cartridge holder is brought close to the chassis 18, and the disk cartridges 220 and 221 held by the cartridge holder are mounted on the chassis 18. The lid body is locked in the closed state and unlocked by an eject operation described later.

When the lid is opened, the cartridge holder is separated from the chassis 18, and the disk cartridges 220 and 221 held by the cartridge holder are separated from the chassis 18.

A disk table according to the present invention is arranged substantially in the center of the chassis 18.

As shown in FIG. 1, this disc table has a table member 10 whose central portion is attached to a drive shaft of a spindle motor 1 attached to the chassis 18, that is, a spindle shaft 2 which is a rotating shaft. Composed. The table member 10 is formed into a substantially disc shape, and a fitting hole 1 into which the spindle shaft 2 is fitted and engaged in the center portion along the disc axis formed by the table member 10.
One. The table member 10 is attached to the spindle shaft 2 by fittingly engaging the spindle shaft 2 in the fitting hole 11. Therefore,
When the spindle shaft 2 is rotationally driven, the disc table is rotated together with the spindle shaft 2.

In this disc table, the positioning hole 20 for the recording disc is formed on the upper surface of the table member 10.
4 has a positioning protrusion 12 that fits into the position 4. The positioning protrusion 12 is formed in a substantially truncated cone shape so that it can be smoothly fitted into the positioning hole 204. The positioning protrusion 12 is formed coaxially with a fitting hole 11 into which the spindle shaft 2 is fitted and engaged.

The positioning protrusion 12 has an elastic displacement portion 17 on the outer peripheral edge as shown in FIGS. 2 and 3. The elastic displacement portion 17 is provided so as to project toward the outer side of the positioning projection portion 12, and is elastically displaced so that it is projected and retracted with respect to the outer peripheral surface of the positioning projection portion 12. There is. That is, when the positioning protrusion 12 is fitted into the positioning hole 204, the elastic displacement portion 17 elastically presses the inner peripheral portion of the positioning hole 204, so that the recording disk 201 is pressed against the disk table. To hold.

A magnet mounting recess 14 into which an annular magnet 13 is fitted and mounted is formed on the upper surface of the positioning protrusion 12. This magnet mounting recess 1
4 is formed in an annular shape corresponding to the shape of the magnet 13.

On the peripheral side of the positioning protrusion 12, a peripheral side portion of the table member 10 is projected in a flange shape, and the peripheral portion of the positioning hole 204 of the recording disk 201 is mounted. A disc mounting portion 15 to be placed is formed.

A gear portion 16 is formed on the outer peripheral edge of the table member 10. This gear part 16
Is formed coaxially with the positioning protrusion 12.

The disc cartridges 220 and 221
Is mounted on the chassis 18, the recording disks 201 of the disk cartridges 220 and 221.
As shown in FIG. 1, the chucking opening 21
3, the positioning protrusion 12 is fitted into the positioning hole 204, and the peripheral portion of the positioning hole 204 is placed on the disc mounting portion 15 and then placed on the disc table. Positioned and retained. At this time, the magnet 13 attracts the chucking plate 202 to the disc table side and holds the recording disc 201 on the disc table, as indicated by arrow A in FIG.

The spindle motor 1 has an outer cylinder portion 8, and the outer cylinder portion 8 is fixedly attached to the chassis 18 with a fixing screw 9. In this spindle motor 1, the spindle shaft 2 has the chassis 18
It is attached to the chassis 18 so as to stand upright with respect to the chassis 18.

In this spindle motor 1, the spindle shaft 2 is arranged in the outer cylinder portion 8 and a support member 4 attached to the outer cylinder portion 8 via rotary bearings (bearings) 3 and 3. Is rotatably supported by.
In this spindle motor 1, the spindle shaft 2
A pair of disk-shaped yoke members 5 and 5 to which a ring-shaped multi-pole magnet 6 is attached are attached to each. The yoke members 5 and 5 face the multi-pole magnets 6 and 6 with each other. A printed circuit board 7 to which a drive coil is attached is interposed between the multi-pole magnets 6 and 6. This printed circuit board 7
Is supported by the outer tubular portion 8 and the outer tubular portion 8
To the connection terminal portion 22 located on the outer side of.

In this spindle motor 1, a drive current is supplied to the drive coil mounted on the printed circuit board 7 via the connection terminal portion 22, so that the spindle shaft 2 is rotated in the forward and reverse directions. Can be selectively rotated in either direction.

In this disc player device, an optical pickup device 19 is arranged on the chassis 18. This optical pickup device 19
Has an optical block part, and in this optical block part,
A light source such as a laser diode, various optical devices for guiding a light beam emitted by the light source, an objective lens for condensing and emitting the light beam, and a photodetector for detecting a reflected light beam of the light beam emitted from the objective lens. It is built in.

The optical pickup device 19 writes or reads an information signal on the recording disc 201 by irradiating the signal recording surface of the recording disc 201 with a light beam emitted from the objective lens. .

The optical pickup device 19
2 is disposed on the chassis 18 so as to be movable in the contact and separation directions with respect to the disk table, as indicated by an arrow T in FIG. This optical pickup device 19
Is driven by a driving force of a pickup feed motor 20 arranged on the chassis 18 via a screw shaft 21 serving as a driving force transmission member.

When the optical pickup device 19 is fed on the chassis 18, the recording disc 20 is rotated by being held by the disc table through the optical pickup opening 222.
The information signal is written or read on the entire surface of the signal recording area 1.

A magnetic head device (not shown) is attached to the optical pickup device 19 so as to face the objective lens. The disc cartridge 22
When 0, 221 are mounted on the chassis 18, the recording disk 201 is positioned between the objective lens and the magnetic head device. This magnetic head device
It faces the recording disk 201 through the magnetic head opening 223.

In this disc player device, as shown in FIGS. 3 to 5, the recording disc 201 held on the disc table by releasing the lock of the lid body in the closed state is removed from the disc table. An eject mechanism is provided that enables an eject operation to be removed.

Further, in this disc player device, as shown in FIGS. 3 to 5, there is provided a driving force transmission mechanism for transmitting the rotational force of the disc table to the eject mechanism through the gear portion 16. There is.

The eject mechanism corresponds to the chassis 18
The first eject slider 43 and the second eject slider 44 are slidably supported by. Each of these eject sliders 43, 44
Are slidably supported along the outer surface of the outer casing of the disc player device.

On the first eject slider 43,
Eject knob 4 for manual slide operation
2 are provided. With this eject knob 42,
As indicated by arrow K in FIG. 3, when the first eject slider 43 is slid in one direction, the first eject slider 43 moves through the eject intermediary lever 40 as indicated by arrow L in FIG. Then, the second eject slider 44 is slid.

That is, the first eject slider 43 pushes the eject mediating piece 41 of the eject mediating lever 40 to move the eject mediating lever 40, and the eject mediating piece 41 is used as the second eject slider 43.
Then, the eject slider 44 is pressed and moved.
The first eject slider 43 cannot slide to a position where it directly presses the second eject slider 44. If the eject mediating piece 41 is not interposed, the second eject slider 4 can be used.
4 cannot be slid.

When the second eject slider 44 is slid through the eject mediating piece 41, the second eject slider 44 releases the lock for keeping the lid closed.
The cartridge holder can be separated from the chassis 18 to enable an ejecting operation of separating the recording disk 201 from the disk table.

The eject intermediary lever 40 is movably disposed on the eject prohibiting lever 33 disposed on the chassis 18, and the eject intermediary piece 41 is disposed.
To the outer side of the outer casing to allow the first and second
Of the eject sliders 43 and 44.

The eject intermediary lever 40 has a support hole 39, and the supporting shaft 38 is planted on the eject prohibiting lever 33, so that the eject intermediating lever 40 is arranged on the eject prohibiting lever 33. It is set up.
The eject intermediary lever 40 has a spring retaining portion 32, and the spring retaining portion 32 and the eject prohibiting lever 3 are provided.
As shown by an arrow J in FIG. 3, the eject intermediary piece 41 is connected to the eject sliders 43,
It is positioned so as to be urged in the direction of entering between the 44.

The eject prohibiting lever 33 has support slits 36 and 37, and these support slits 36 and 3 are provided.
The support shafts 34 and 35 provided on the chassis 18 are inserted into the shaft 7, so that the chassis 7 is slidably supported on the chassis 18. This eject prohibition lever 33
3, as shown in FIG. 3, an eject permission position where the eject mediating piece 41 is inserted between the eject sliders 43 and 44, and as shown in FIG. 5, the eject mediating piece 41 is ejected. It is slidable between the sliders 43 and 44 and the eject prohibition position where the slider 43 and 44 are retracted.

The eject prohibiting lever 33 is provided with a toggle spring retaining portion 46. One arm portion of the toggle spring 45 is hooked on the toggle spring hooking portion 46. The other arm portion of the toggle spring 45 is
It is hooked on a hooking portion on the chassis 18.

The toggle spring 45 has an elastic force in the direction of increasing the distance between the arms, and the toggle spring retaining portion 46 of the eject prohibiting lever 33 and the chassis 1 are provided.
It is interposed between the hooking portion 8 and the hooking portion.

The distance between the toggle spring hooking portion 46 of the eject prohibiting lever 33 and the hooking portion of the chassis 18 is set between the eject allowing lever 33 and the eject prohibiting position. It is designed to be the narrowest when it is in some intermediate position. That is, when the eject prohibiting lever 33 is in the eject permitting position or the eject prohibiting position, the distance between the toggle spring locking portion 46 of the eject inhibiting lever 33 and the locking portion of the chassis 18 is It is wider than when the eject prohibiting lever 33 is in the intermediate position.

Therefore, when the eject prohibiting lever 33 is located closer to the eject permitting position than the intermediate position, the toggle spring 45 causes the eject prohibiting lever 33 to move to the eject permitting position as shown by an arrow H in FIG. To the side of the eject prohibiting lever 3
When 3 is closer to the eject prohibiting position than the intermediate position, the eject prohibiting lever 33 is urged to move toward the eject prohibiting position, as indicated by arrow G in FIG.

Then, in this disc player device, during writing or reading of the information signal to or from the recording disc, the eject prohibiting lever 33 causes the driving force to be described later, as shown in FIG. It is slid to the eject prohibition position by the transmission mechanism. At this time, even if the first eject slider 43 is slid toward the second eject slider 44 as shown by an arrow K in FIG. 5, the second eject slider 44 can be slid. And the eject operation cannot be executed.

In this disc player device, when the information signal is not written in or read from the recording disc, the eject prohibiting lever 33 is driven by a driving force transmitting mechanism described later, as shown in FIG. , Is slid to the eject permission position. At this time, the first eject slider 43 is
As indicated by an arrow K in FIG. 3, when the slide operation is performed to the second eject slider 44 side, the second eject is performed through the eject mediating piece 41 as indicated by an arrow L in FIG. The slider 44 is slid to execute the eject operation.

Then, the driving force transmitting mechanism applies the rotational force of the disc table to the eject inhibiting lever 33.
It is configured to have a gear train that transmits to.

That is, the driving force transmission mechanism is rotatably supported on the chassis 18 and is supported by the table member 1.
It has a first transmission gear 23 that meshes with the gear unit 16 of No. 0. A second transmission gear 24 having a diameter smaller than that of the first transmission gear 23 is coaxially and integrally attached to the first transmission gear 23. A third transmission gear 25, which is rotatably supported on the chassis 18, meshes with the second transmission gear 24. This third transmission gear 25
A fourth transmission gear 26 having a smaller diameter than the third transmission gear 25 is coaxially and integrally attached to the. This fourth
A fifth transmission gear 27 rotatably supported on the chassis 18 is meshed with the transmission gear 26. A sixth transmission gear 28 having a diameter smaller than that of the fifth transmission gear 27 is coaxially and integrally attached to the fifth transmission gear 27.

A rotating lever 29 is rotatably attached to the fifth transmission gear 27 via a friction member. The pivot lever 29 has a base end side,
It is rotatably supported around the support shaft of the transmission gear 27. That is, the rotation lever 29 is rotated by the driving force transmitted from the fifth transmission gear 27 via the friction member in a direction following the rotation direction of the fifth transmission gear 27. It

A seventh transmission gear 31 is rotatably attached to the tip end side of the rotating lever 29. This seventh
The transmission gear 31 of is meshed with the sixth transmission gear 28.

The seventh transmission gear 31 is the rack gear 32 provided on the eject prohibiting lever 33.
Mesh with. The rack gear 32 is formed along the slidable direction of the eject prohibiting lever 33.

The eject prohibiting lever 33 is slidable within a range of, for example, ± 2 mm between the eject permitting position and the eject prohibiting position, with the intermediate position as 0 point. The slidable distance of the eject prohibiting lever 33 is X (mm) (that is,
± (X / 2) (mm)), the length of the rack gear 32 is L (mm), and the moving distance of the seventh transmission gear 31 due to the rotation of the rotating lever 29 is P (mm). Then, P> (L−X) ≧ 0 holds.

The seventh transmission gear 31 shown in FIG.
As shown in FIG. 3, when the eject prohibiting lever 33 is in the eject permitting position, it is closer to the eject prohibiting position than the rack gear 32.
As shown in FIG. 5, from the position where the rack gear 32 is not meshed with the rack gear 32 to the eject permission position side of the rack gear 32 when the eject prohibition lever 33 is in the eject prohibition position. It can be moved.

The seventh transmission gear 31 is shown in FIGS.
As shown in FIG. 5, when the eject prohibiting lever 33 is in the eject permitting position, the spindle motor 1 causes the disc table to move to the recording disc 20.
When the sixth transmission gear 28 is rotated in the forward rotation direction indicated by the arrow D in FIG. 4, which is the rotation direction when the recording or reproduction of the information signal for 1 is performed, the sixth transmission gear 28 is rotated in the reverse rotation direction indicated by the arrow E in FIG. When the rack gear 3 is rotated by
It moves to the eject permission position side while meshing with 2, and is further rotated as shown by an arrow F in FIG. 5 to move the eject prohibition lever 33 to the eject prohibition position side. At this time, the eject prohibiting lever 33 is moved to the eject prohibiting position side beyond the intermediate position, and by the biasing force of the toggle spring 45, as shown by an arrow G in FIG. The slide operation is performed.

That is, as shown in FIG. 5, the eject mechanism prohibits the eject operation when the disc table is rotated in the normal direction.

The seventh transmission gear 31 shown in FIG.
As shown in FIG. 3, when the eject prohibiting lever 33 is in the eject prohibiting position, the spindle motor 1 rotates the disk table in the reverse direction indicated by the arrow B in FIG. Then, the sixth transmission gear 28 is rotated in the forward direction indicated by the arrow C in FIG. 3 to move to the eject prohibition position side while meshing with the rack gear 32, and then to the eject prohibition position. The lever 33 is moved to the eject permission position side. At this time, the eject prohibiting lever 33
Is moved to the eject permitting position side beyond the intermediate position, and is slid to the eject permitting position by the biasing force of the toggle spring 45, as shown by an arrow H in FIG.

That is, as shown in FIG. 3, this eject mechanism enables the eject operation when the disk table is rotated in the reverse direction indicated by the arrow B in FIG.

[0087]

As described above, in the disc table according to the present invention, the positioning protrusion that fits into the circular positioning hole provided in the central portion of the recording disc, and the flange on the peripheral side of the positioning protrusion. A disk mounting portion on which the peripheral portion of the positioning hole of the recording disk is mounted, and a gear portion formed coaxially with the positioning protrusion, It is attached to a rotating shaft along the central axis of and is operated to rotate.

Therefore, the disc table is not only used for rotating the recording disc which is positioned by the positioning protrusions and placed on the disc mounting portion, but is also rotated by the gear portion. The driving force to be operated can be transmitted to the outside.

That is, according to the present invention, the driving force of the spindle motor can be used for other purposes such as the rotating operation of the recording disk, and the number of motors required for the structure of the disk player device can be reduced. It is possible to provide a disk table as follows.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a configuration of a disc table according to the present invention.

FIG. 2 is a plan view showing a part of a structure of a main part of a disc player device having the disc table in a see-through manner.

FIG. 3 is a plan view of relevant parts showing a part of a state where the disc player device is in a stop mode in a see-through manner.

FIG. 4 is a plan view of relevant parts showing a part of the disc player device at the start of a recording mode in a partially transparent manner.

FIG. 5 is a plan view of relevant parts showing a part of a state of the disc player device in a recording mode in a see-through manner.

FIG. 6 is a perspective view of the recording / reproducing disc cartridge used in the disc player device as seen from the upper surface side.

FIG. 7 is a perspective view of the recording / reproducing disk cartridge as viewed from the bottom side.

FIG. 8 is a perspective view of a read-only disc cartridge used in the disc player device as seen from the upper surface side.

FIG. 9 is a perspective view of the reproduction-only disc cartridge as viewed from the bottom side.

FIG. 10 is a plan view showing a configuration of a main part of a conventional disc player device.

[Explanation of symbols]

 2 spindle shaft 10 table member 12 positioning protrusion 15 disc mounting portion 16 gear portion 201 recording disc

Claims (1)

[Claims] 1. A positioning protrusion that fits into a circular positioning hole provided in the central portion of a recording disk, and a flange-like protrusion that is provided on the peripheral side of the positioning protrusion.
The recording disk includes a disk mounting portion on which a peripheral portion of the positioning hole is mounted, and a gear portion formed coaxially with the positioning protrusion, and along a central axis of the disc positioning protrusion. A disk table that is designed to be mounted on a rotating shaft and operated to rotate.